widget.cpp

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00001 /* $Id: widget.cpp 24915 2013-01-14 21:16:56Z smatz $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "company_func.h"
00014 #include "window_gui.h"
00015 #include "viewport_func.h"
00016 #include "zoom_func.h"
00017 #include "strings_func.h"
00018 #include "transparency.h"
00019 #include "core/geometry_func.hpp"
00020 #include "settings_type.h"
00021 #include "querystring_gui.h"
00022 
00023 #include "table/sprites.h"
00024 #include "table/strings.h"
00025 #include "table/palettes.h"
00026 
00027 static const char *UPARROW   = "\xEE\x8A\xA0"; 
00028 static const char *DOWNARROW = "\xEE\x8A\xAA"; 
00029 
00039 static Point HandleScrollbarHittest(const Scrollbar *sb, int top, int bottom, bool horizontal)
00040 {
00041   /* Base for reversion */
00042   int rev_base = top + bottom;
00043   int button_size;
00044   if (horizontal) {
00045     button_size = NWidgetScrollbar::GetHorizontalDimension().width;
00046   } else {
00047     button_size = NWidgetScrollbar::GetVerticalDimension().height;
00048   }
00049   top += button_size;    // top    points to just below the up-button
00050   bottom -= button_size; // bottom points to top of the down-button
00051 
00052   int height = (bottom - top);
00053   int pos = sb->GetPosition();
00054   int count = sb->GetCount();
00055   int cap = sb->GetCapacity();
00056 
00057   if (count != 0) top += height * pos / count;
00058 
00059   if (cap > count) cap = count;
00060   if (count != 0) bottom -= (count - pos - cap) * height / count;
00061 
00062   Point pt;
00063   if (horizontal && _current_text_dir == TD_RTL) {
00064     pt.x = rev_base - bottom;
00065     pt.y = rev_base - top;
00066   } else {
00067     pt.x = top;
00068     pt.y = bottom;
00069   }
00070   return pt;
00071 }
00072 
00082 static void ScrollbarClickPositioning(Window *w, NWidgetScrollbar *sb, int x, int y, int mi, int ma)
00083 {
00084   int pos;
00085   int button_size;
00086   bool rtl = false;
00087 
00088   if (sb->type == NWID_HSCROLLBAR) {
00089     pos = x;
00090     rtl = _current_text_dir == TD_RTL;
00091     button_size = NWidgetScrollbar::GetHorizontalDimension().width;
00092   } else {
00093     pos = y;
00094     button_size = NWidgetScrollbar::GetVerticalDimension().height;
00095   }
00096   if (pos < mi + button_size) {
00097     /* Pressing the upper button? */
00098     SetBit(sb->disp_flags, NDB_SCROLLBAR_UP);
00099     if (_scroller_click_timeout <= 1) {
00100       _scroller_click_timeout = 3;
00101       sb->UpdatePosition(rtl ? 1 : -1);
00102     }
00103     w->scrolling_scrollbar = sb->index;
00104   } else if (pos >= ma - button_size) {
00105     /* Pressing the lower button? */
00106     SetBit(sb->disp_flags, NDB_SCROLLBAR_DOWN);
00107 
00108     if (_scroller_click_timeout <= 1) {
00109       _scroller_click_timeout = 3;
00110       sb->UpdatePosition(rtl ? -1 : 1);
00111     }
00112     w->scrolling_scrollbar = sb->index;
00113   } else {
00114     Point pt = HandleScrollbarHittest(sb, mi, ma, sb->type == NWID_HSCROLLBAR);
00115 
00116     if (pos < pt.x) {
00117       sb->UpdatePosition(rtl ? 1 : -1, Scrollbar::SS_BIG);
00118     } else if (pos > pt.y) {
00119       sb->UpdatePosition(rtl ? -1 : 1, Scrollbar::SS_BIG);
00120     } else {
00121       _scrollbar_start_pos = pt.x - mi - button_size;
00122       _scrollbar_size = ma - mi - button_size * 2;
00123       w->scrolling_scrollbar = sb->index;
00124       _cursorpos_drag_start = _cursor.pos;
00125     }
00126   }
00127 
00128   w->SetDirty();
00129 }
00130 
00139 void ScrollbarClickHandler(Window *w, NWidgetCore *nw, int x, int y)
00140 {
00141   int mi, ma;
00142 
00143   if (nw->type == NWID_HSCROLLBAR) {
00144     mi = nw->pos_x;
00145     ma = nw->pos_x + nw->current_x;
00146   } else {
00147     mi = nw->pos_y;
00148     ma = nw->pos_y + nw->current_y;
00149   }
00150   ScrollbarClickPositioning(w, dynamic_cast<NWidgetScrollbar*>(nw), x, y, mi, ma);
00151 }
00152 
00161 int GetWidgetFromPos(const Window *w, int x, int y)
00162 {
00163   NWidgetCore *nw = w->nested_root->GetWidgetFromPos(x, y);
00164   return (nw != NULL) ? nw->index : -1;
00165 }
00166 
00176 void DrawFrameRect(int left, int top, int right, int bottom, Colours colour, FrameFlags flags)
00177 {
00178   assert(colour < COLOUR_END);
00179 
00180   uint dark         = _colour_gradient[colour][3];
00181   uint medium_dark  = _colour_gradient[colour][5];
00182   uint medium_light = _colour_gradient[colour][6];
00183   uint light        = _colour_gradient[colour][7];
00184 
00185   if (flags & FR_TRANSPARENT) {
00186     GfxFillRect(left, top, right, bottom, PALETTE_TO_TRANSPARENT, FILLRECT_RECOLOUR);
00187   } else {
00188     uint interior;
00189 
00190     if (flags & FR_LOWERED) {
00191       GfxFillRect(left,                 top,                left,                   bottom,                   dark);
00192       GfxFillRect(left + WD_BEVEL_LEFT, top,                right,                  top,                      dark);
00193       GfxFillRect(right,                top + WD_BEVEL_TOP, right,                  bottom - WD_BEVEL_BOTTOM, light);
00194       GfxFillRect(left + WD_BEVEL_LEFT, bottom,             right,                  bottom,                   light);
00195       interior = (flags & FR_DARKENED ? medium_dark : medium_light);
00196     } else {
00197       GfxFillRect(left,                 top,                left,                   bottom - WD_BEVEL_BOTTOM, light);
00198       GfxFillRect(left + WD_BEVEL_LEFT, top,                right - WD_BEVEL_RIGHT, top,                      light);
00199       GfxFillRect(right,                top,                right,                  bottom - WD_BEVEL_BOTTOM, dark);
00200       GfxFillRect(left,                 bottom,             right,                  bottom,                   dark);
00201       interior = medium_dark;
00202     }
00203     if (!(flags & FR_BORDERONLY)) {
00204       GfxFillRect(left + WD_BEVEL_LEFT, top + WD_BEVEL_TOP, right - WD_BEVEL_RIGHT, bottom - WD_BEVEL_BOTTOM, interior);
00205     }
00206   }
00207 }
00208 
00217 static inline void DrawImageButtons(const Rect &r, WidgetType type, Colours colour, bool clicked, SpriteID img)
00218 {
00219   assert(img != 0);
00220   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
00221 
00222   if ((type & WWT_MASK) == WWT_IMGBTN_2 && clicked) img++; // Show different image when clicked for #WWT_IMGBTN_2.
00223   DrawSprite(img, PAL_NONE, r.left + WD_IMGBTN_LEFT + clicked, r.top + WD_IMGBTN_TOP + clicked);
00224 }
00225 
00233 static inline void DrawLabel(const Rect &r, WidgetType type, bool clicked, StringID str)
00234 {
00235   if (str == STR_NULL) return;
00236   if ((type & WWT_MASK) == WWT_TEXTBTN_2 && clicked) str++;
00237   Dimension d = GetStringBoundingBox(str);
00238   int offset = max(0, ((int)(r.bottom - r.top + 1) - (int)d.height) / 2); // Offset for rendering the text vertically centered
00239   DrawString(r.left + clicked, r.right + clicked, r.top + offset + clicked, str, TC_FROMSTRING, SA_HOR_CENTER);
00240 }
00241 
00248 static inline void DrawText(const Rect &r, TextColour colour, StringID str)
00249 {
00250   Dimension d = GetStringBoundingBox(str);
00251   int offset = max(0, ((int)(r.bottom - r.top + 1) - (int)d.height) / 2); // Offset for rendering the text vertically centered
00252   if (str != STR_NULL) DrawString(r.left, r.right, r.top + offset, str, colour);
00253 }
00254 
00261 static inline void DrawInset(const Rect &r, Colours colour, StringID str)
00262 {
00263   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, FR_LOWERED | FR_DARKENED);
00264   if (str != STR_NULL) DrawString(r.left + WD_INSET_LEFT, r.right - WD_INSET_RIGHT, r.top + WD_INSET_TOP, str);
00265 }
00266 
00274 static inline void DrawMatrix(const Rect &r, Colours colour, bool clicked, uint16 data)
00275 {
00276   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
00277 
00278   int num_columns = GB(data, MAT_COL_START, MAT_COL_BITS);  // Lower 8 bits of the widget data: Number of columns in the matrix.
00279   int column_width = (r.right - r.left + 1) / num_columns; // Width of a single column in the matrix.
00280 
00281   int num_rows = GB(data, MAT_ROW_START, MAT_ROW_BITS); // Upper 8 bits of the widget data: Number of rows in the matrix.
00282   int row_height = (r.bottom - r.top + 1) / num_rows; // Height of a single row in the matrix.
00283 
00284   int col = _colour_gradient[colour & 0xF][6];
00285 
00286   int x = r.left;
00287   for (int ctr = num_columns; ctr > 1; ctr--) {
00288     x += column_width;
00289     GfxFillRect(x, r.top + 1, x, r.bottom - 1, col);
00290   }
00291 
00292   x = r.top;
00293   for (int ctr = num_rows; ctr > 1; ctr--) {
00294     x += row_height;
00295     GfxFillRect(r.left + 1, x, r.right - 1, x, col);
00296   }
00297 
00298   col = _colour_gradient[colour & 0xF][4];
00299 
00300   x = r.left - 1;
00301   for (int ctr = num_columns; ctr > 1; ctr--) {
00302     x += column_width;
00303     GfxFillRect(x, r.top + 1, x, r.bottom - 1, col);
00304   }
00305 
00306   x = r.top - 1;
00307   for (int ctr = num_rows; ctr > 1; ctr--) {
00308     x += row_height;
00309     GfxFillRect(r.left + 1, x, r.right - 1, x, col);
00310   }
00311 }
00312 
00322 static inline void DrawVerticalScrollbar(const Rect &r, Colours colour, bool up_clicked, bool bar_dragged, bool down_clicked, const Scrollbar *scrollbar)
00323 {
00324   int centre = (r.right - r.left) / 2;
00325   int height = NWidgetScrollbar::GetVerticalDimension().height;
00326 
00327   /* draw up/down buttons */
00328   DrawFrameRect(r.left, r.top, r.right, r.top + height - 1, colour, (up_clicked) ? FR_LOWERED : FR_NONE);
00329   DrawString(r.left + up_clicked, r.right + up_clicked, r.top + up_clicked, UPARROW, TC_BLACK, SA_HOR_CENTER);
00330 
00331   DrawFrameRect(r.left, r.bottom - (height - 1), r.right, r.bottom, colour, (down_clicked) ? FR_LOWERED : FR_NONE);
00332   DrawString(r.left + down_clicked, r.right + down_clicked, r.bottom - (height - 1) + down_clicked, DOWNARROW, TC_BLACK, SA_HOR_CENTER);
00333 
00334   int c1 = _colour_gradient[colour & 0xF][3];
00335   int c2 = _colour_gradient[colour & 0xF][7];
00336 
00337   /* draw "shaded" background */
00338   GfxFillRect(r.left, r.top + height, r.right, r.bottom - height, c2);
00339   GfxFillRect(r.left, r.top + height, r.right, r.bottom - height, c1, FILLRECT_CHECKER);
00340 
00341   /* draw shaded lines */
00342   GfxFillRect(r.left + centre - 3, r.top + height, r.left + centre - 3, r.bottom - height, c1);
00343   GfxFillRect(r.left + centre - 2, r.top + height, r.left + centre - 2, r.bottom - height, c2);
00344   GfxFillRect(r.left + centre + 2, r.top + height, r.left + centre + 2, r.bottom - height, c1);
00345   GfxFillRect(r.left + centre + 3, r.top + height, r.left + centre + 3, r.bottom - height, c2);
00346 
00347   Point pt = HandleScrollbarHittest(scrollbar, r.top, r.bottom, false);
00348   DrawFrameRect(r.left, pt.x, r.right, pt.y, colour, bar_dragged ? FR_LOWERED : FR_NONE);
00349 }
00350 
00360 static inline void DrawHorizontalScrollbar(const Rect &r, Colours colour, bool left_clicked, bool bar_dragged, bool right_clicked, const Scrollbar *scrollbar)
00361 {
00362   int centre = (r.bottom - r.top) / 2;
00363   int width = NWidgetScrollbar::GetHorizontalDimension().width;
00364 
00365   DrawFrameRect(r.left, r.top, r.left + width - 1, r.bottom, colour, left_clicked ? FR_LOWERED : FR_NONE);
00366   DrawSprite(SPR_ARROW_LEFT, PAL_NONE, r.left + 1 + left_clicked, r.top + 1 + left_clicked);
00367 
00368   DrawFrameRect(r.right - (width - 1), r.top, r.right, r.bottom, colour, right_clicked ? FR_LOWERED : FR_NONE);
00369   DrawSprite(SPR_ARROW_RIGHT, PAL_NONE, r.right - (width - 2) + right_clicked, r.top + 1 + right_clicked);
00370 
00371   int c1 = _colour_gradient[colour & 0xF][3];
00372   int c2 = _colour_gradient[colour & 0xF][7];
00373 
00374   /* draw "shaded" background */
00375   GfxFillRect(r.left + width, r.top, r.right - width, r.bottom, c2);
00376   GfxFillRect(r.left + width, r.top, r.right - width, r.bottom, c1, FILLRECT_CHECKER);
00377 
00378   /* draw shaded lines */
00379   GfxFillRect(r.left + width, r.top + centre - 3, r.right - width, r.top + centre - 3, c1);
00380   GfxFillRect(r.left + width, r.top + centre - 2, r.right - width, r.top + centre - 2, c2);
00381   GfxFillRect(r.left + width, r.top + centre + 2, r.right - width, r.top + centre + 2, c1);
00382   GfxFillRect(r.left + width, r.top + centre + 3, r.right - width, r.top + centre + 3, c2);
00383 
00384   /* draw actual scrollbar */
00385   Point pt = HandleScrollbarHittest(scrollbar, r.left, r.right, true);
00386   DrawFrameRect(pt.x, r.top, pt.y, r.bottom, colour, bar_dragged ? FR_LOWERED : FR_NONE);
00387 }
00388 
00395 static inline void DrawFrame(const Rect &r, Colours colour, StringID str)
00396 {
00397   int x2 = r.left; // by default the left side is the left side of the widget
00398 
00399   if (str != STR_NULL) x2 = DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top, str);
00400 
00401   int c1 = _colour_gradient[colour][3];
00402   int c2 = _colour_gradient[colour][7];
00403 
00404   /* If the frame has text, adjust the top bar to fit half-way through */
00405   int dy1 = 4;
00406   if (str != STR_NULL) dy1 = FONT_HEIGHT_NORMAL / 2 - 1;
00407   int dy2 = dy1 + 1;
00408 
00409   if (_current_text_dir == TD_LTR) {
00410     /* Line from upper left corner to start of text */
00411     GfxFillRect(r.left, r.top + dy1, r.left + 4, r.top + dy1, c1);
00412     GfxFillRect(r.left + 1, r.top + dy2, r.left + 4, r.top + dy2, c2);
00413 
00414     /* Line from end of text to upper right corner */
00415     GfxFillRect(x2, r.top + dy1, r.right - 1, r.top + dy1, c1);
00416     GfxFillRect(x2, r.top + dy2, r.right - 2, r.top + dy2, c2);
00417   } else {
00418     /* Line from upper left corner to start of text */
00419     GfxFillRect(r.left, r.top + dy1, x2 - 2, r.top + dy1, c1);
00420     GfxFillRect(r.left + 1, r.top + dy2, x2 - 2, r.top + dy2, c2);
00421 
00422     /* Line from end of text to upper right corner */
00423     GfxFillRect(r.right - 5, r.top + dy1, r.right - 1, r.top + dy1, c1);
00424     GfxFillRect(r.right - 5, r.top + dy2, r.right - 2, r.top + dy2, c2);
00425   }
00426 
00427   /* Line from upper left corner to bottom left corner */
00428   GfxFillRect(r.left, r.top + dy2, r.left, r.bottom - 1, c1);
00429   GfxFillRect(r.left + 1, r.top + dy2 + 1, r.left + 1, r.bottom - 2, c2);
00430 
00431   /* Line from upper right corner to bottom right corner */
00432   GfxFillRect(r.right - 1, r.top + dy2, r.right - 1, r.bottom - 2, c1);
00433   GfxFillRect(r.right, r.top + dy1, r.right, r.bottom - 1, c2);
00434 
00435   GfxFillRect(r.left + 1, r.bottom - 1, r.right - 1, r.bottom - 1, c1);
00436   GfxFillRect(r.left, r.bottom, r.right, r.bottom, c2);
00437 }
00438 
00445 static inline void DrawShadeBox(const Rect &r, Colours colour, bool clicked)
00446 {
00447   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
00448   DrawSprite((clicked) ? SPR_WINDOW_SHADE : SPR_WINDOW_UNSHADE, PAL_NONE, r.left + WD_SHADEBOX_LEFT + clicked, r.top + WD_SHADEBOX_TOP + clicked);
00449 }
00450 
00457 static inline void DrawStickyBox(const Rect &r, Colours colour, bool clicked)
00458 {
00459   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
00460   DrawSprite((clicked) ? SPR_PIN_UP : SPR_PIN_DOWN, PAL_NONE, r.left + WD_STICKYBOX_LEFT + clicked, r.top + WD_STICKYBOX_TOP + clicked);
00461 }
00462 
00469 static inline void DrawDebugBox(const Rect &r, Colours colour, bool clicked)
00470 {
00471   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
00472   DrawSprite(SPR_WINDOW_DEBUG, PAL_NONE, r.left + WD_DEBUGBOX_LEFT + clicked, r.top + WD_DEBUGBOX_TOP + clicked);
00473 }
00474 
00482 static inline void DrawResizeBox(const Rect &r, Colours colour, bool at_left, bool clicked)
00483 {
00484   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
00485   if (at_left) {
00486     DrawSprite(SPR_WINDOW_RESIZE_LEFT, PAL_NONE, r.left + WD_RESIZEBOX_RIGHT + clicked,
00487          r.bottom - WD_RESIZEBOX_BOTTOM - GetSpriteSize(SPR_WINDOW_RESIZE_LEFT).height + clicked);
00488   } else {
00489     DrawSprite(SPR_WINDOW_RESIZE_RIGHT, PAL_NONE, r.left + WD_RESIZEBOX_LEFT + clicked,
00490          r.bottom - WD_RESIZEBOX_BOTTOM - GetSpriteSize(SPR_WINDOW_RESIZE_RIGHT).height + clicked);
00491   }
00492 }
00493 
00500 static inline void DrawCloseBox(const Rect &r, Colours colour, StringID str)
00501 {
00502   assert(str == STR_BLACK_CROSS || str == STR_SILVER_CROSS); // black or silver cross
00503   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, FR_NONE);
00504   DrawString(r.left + WD_CLOSEBOX_LEFT, r.right - WD_CLOSEBOX_RIGHT, r.top + WD_CLOSEBOX_TOP, str, TC_FROMSTRING, SA_HOR_CENTER);
00505 }
00506 
00514 void DrawCaption(const Rect &r, Colours colour, Owner owner, StringID str)
00515 {
00516   DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, FR_BORDERONLY);
00517   DrawFrameRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, colour, (owner == INVALID_OWNER) ? FR_LOWERED | FR_DARKENED : FR_LOWERED | FR_DARKENED | FR_BORDERONLY);
00518 
00519   if (owner != INVALID_OWNER) {
00520     GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, _colour_gradient[_company_colours[owner]][4]);
00521   }
00522 
00523   if (str != STR_NULL) {
00524     Dimension d = GetStringBoundingBox(str);
00525     int offset = max(0, ((int)(r.bottom - r.top + 1) - (int)d.height) / 2); // Offset for rendering the text vertically centered
00526     DrawString(r.left + WD_CAPTIONTEXT_LEFT, r.right - WD_CAPTIONTEXT_RIGHT, r.top + offset, str, TC_FROMSTRING, SA_HOR_CENTER);
00527   }
00528 }
00529 
00540 static inline void DrawButtonDropdown(const Rect &r, Colours colour, bool clicked_button, bool clicked_dropdown, StringID str)
00541 {
00542   int text_offset = max(0, ((int)(r.bottom - r.top + 1) - FONT_HEIGHT_NORMAL) / 2); // Offset for rendering the text vertically centered
00543 
00544   if (_current_text_dir == TD_LTR) {
00545     DrawFrameRect(r.left, r.top, r.right - 12, r.bottom, colour, clicked_button ? FR_LOWERED : FR_NONE);
00546     DrawFrameRect(r.right - 11, r.top, r.right, r.bottom, colour, clicked_dropdown ? FR_LOWERED : FR_NONE);
00547     DrawString(r.right - (clicked_dropdown ? 10 : 11), r.right, r.top + (clicked_dropdown ? 2 : 1), DOWNARROW, TC_BLACK, SA_HOR_CENTER);
00548     if (str != STR_NULL) DrawString(r.left + WD_DROPDOWNTEXT_LEFT + clicked_button, r.right - WD_DROPDOWNTEXT_RIGHT + clicked_button, r.top + text_offset + clicked_button, str, TC_BLACK);
00549   } else {
00550     DrawFrameRect(r.left + 12, r.top, r.right, r.bottom, colour, clicked_button ? FR_LOWERED : FR_NONE);
00551     DrawFrameRect(r.left, r.top, r.left + 11, r.bottom, colour, clicked_dropdown ? FR_LOWERED : FR_NONE);
00552     DrawString(r.left + clicked_dropdown, r.left + 11, r.top + (clicked_dropdown ? 2 : 1), DOWNARROW, TC_BLACK, SA_HOR_CENTER);
00553     if (str != STR_NULL) DrawString(r.left + WD_DROPDOWNTEXT_RIGHT + clicked_button, r.right - WD_DROPDOWNTEXT_LEFT + clicked_button, r.top + text_offset + clicked_button, str, TC_BLACK);
00554   }
00555 }
00556 
00564 static inline void DrawDropdown(const Rect &r, Colours colour, bool clicked, StringID str)
00565 {
00566   DrawButtonDropdown(r, colour, false, clicked, str);
00567 }
00568 
00572 void Window::DrawWidgets() const
00573 {
00574   this->nested_root->Draw(this);
00575 
00576   if (this->flags & WF_WHITE_BORDER) {
00577     DrawFrameRect(0, 0, this->width - 1, this->height - 1, COLOUR_WHITE, FR_BORDERONLY);
00578   }
00579 
00580   if (this->flags & WF_HIGHLIGHTED) {
00581     extern bool _window_highlight_colour;
00582     for (uint i = 0; i < this->nested_array_size; i++) {
00583       const NWidgetBase *widget = this->GetWidget<NWidgetBase>(i);
00584       if (widget == NULL || !widget->IsHighlighted()) continue;
00585 
00586       int left = widget->pos_x;
00587       int top  = widget->pos_y;
00588       int right  = left + widget->current_x - 1;
00589       int bottom = top  + widget->current_y - 1;
00590 
00591       int colour = _string_colourmap[_window_highlight_colour ? widget->GetHighlightColour() : TC_WHITE];
00592 
00593       GfxFillRect(left,                 top,    left,                   bottom - WD_BEVEL_BOTTOM, colour);
00594       GfxFillRect(left + WD_BEVEL_LEFT, top,    right - WD_BEVEL_RIGHT, top,                      colour);
00595       GfxFillRect(right,                top,    right,                  bottom - WD_BEVEL_BOTTOM, colour);
00596       GfxFillRect(left,                 bottom, right,                  bottom,                   colour);
00597     }
00598   }
00599 }
00600 
00606 void Window::DrawSortButtonState(int widget, SortButtonState state) const
00607 {
00608   if (state == SBS_OFF) return;
00609 
00610   assert(this->nested_array != NULL);
00611   const NWidgetBase *nwid = this->GetWidget<NWidgetBase>(widget);
00612 
00613   int offset = this->IsWidgetLowered(widget) ? 1 : 0;
00614   int base = offset + nwid->pos_x + (_current_text_dir == TD_LTR ? nwid->current_x - WD_SORTBUTTON_ARROW_WIDTH : 0);
00615   int top = nwid->pos_y;
00616 
00617   DrawString(base, base + WD_SORTBUTTON_ARROW_WIDTH, top + 1 + offset, state == SBS_DOWN ? DOWNARROW : UPARROW, TC_BLACK, SA_HOR_CENTER);
00618 }
00619 
00620 
00678 NWidgetBase::NWidgetBase(WidgetType tp) : ZeroedMemoryAllocator()
00679 {
00680   this->type = tp;
00681 }
00682 
00683 /* ~NWidgetContainer() takes care of #next and #prev data members. */
00684 
00732 void NWidgetBase::SetDirty(const Window *w) const
00733 {
00734   int abs_left = w->left + this->pos_x;
00735   int abs_top = w->top + this->pos_y;
00736   SetDirtyBlocks(abs_left, abs_top, abs_left + this->current_x, abs_top + this->current_y);
00737 }
00738 
00752 NWidgetBase *NWidgetBase::GetWidgetOfType(WidgetType tp)
00753 {
00754   return (this->type == tp) ? this : NULL;
00755 }
00756 
00763 NWidgetResizeBase::NWidgetResizeBase(WidgetType tp, uint fill_x, uint fill_y) : NWidgetBase(tp)
00764 {
00765   this->fill_x = fill_x;
00766   this->fill_y = fill_y;
00767 }
00768 
00774 void NWidgetResizeBase::SetMinimalSize(uint min_x, uint min_y)
00775 {
00776   this->min_x = min_x;
00777   this->min_y = min_y;
00778 }
00779 
00786 void NWidgetResizeBase::SetMinimalTextLines(uint8 min_lines, uint8 spacing, FontSize size)
00787 {
00788   this->min_y = min_lines * GetCharacterHeight(size) + spacing;
00789 }
00790 
00796 void NWidgetResizeBase::SetFill(uint fill_x, uint fill_y)
00797 {
00798   this->fill_x = fill_x;
00799   this->fill_y = fill_y;
00800 }
00801 
00807 void NWidgetResizeBase::SetResize(uint resize_x, uint resize_y)
00808 {
00809   this->resize_x = resize_x;
00810   this->resize_y = resize_y;
00811 }
00812 
00813 void NWidgetResizeBase::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
00814 {
00815   this->StoreSizePosition(sizing, x, y, given_width, given_height);
00816 }
00817 
00827 NWidgetCore::NWidgetCore(WidgetType tp, Colours colour, uint fill_x, uint fill_y, uint32 widget_data, StringID tool_tip) : NWidgetResizeBase(tp, fill_x, fill_y)
00828 {
00829   this->colour = colour;
00830   this->index = -1;
00831   this->widget_data = widget_data;
00832   this->tool_tip = tool_tip;
00833   this->scrollbar_index = -1;
00834 }
00835 
00840 void NWidgetCore::SetIndex(int index)
00841 {
00842   assert(index >= 0);
00843   this->index = index;
00844 }
00845 
00851 void NWidgetCore::SetDataTip(uint32 widget_data, StringID tool_tip)
00852 {
00853   this->widget_data = widget_data;
00854   this->tool_tip = tool_tip;
00855 }
00856 
00857 void NWidgetCore::FillNestedArray(NWidgetBase **array, uint length)
00858 {
00859   if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
00860 }
00861 
00862 NWidgetCore *NWidgetCore::GetWidgetFromPos(int x, int y)
00863 {
00864   return (IsInsideBS(x, this->pos_x, this->current_x) && IsInsideBS(y, this->pos_y, this->current_y)) ? this : NULL;
00865 }
00866 
00871 NWidgetContainer::NWidgetContainer(WidgetType tp) : NWidgetBase(tp)
00872 {
00873   this->head = NULL;
00874   this->tail = NULL;
00875 }
00876 
00877 NWidgetContainer::~NWidgetContainer()
00878 {
00879   while (this->head != NULL) {
00880     NWidgetBase *wid = this->head->next;
00881     delete this->head;
00882     this->head = wid;
00883   }
00884   this->tail = NULL;
00885 }
00886 
00887 NWidgetBase *NWidgetContainer::GetWidgetOfType(WidgetType tp)
00888 {
00889   if (this->type == tp) return this;
00890   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
00891     NWidgetBase *nwid = child_wid->GetWidgetOfType(tp);
00892     if (nwid != NULL) return nwid;
00893   }
00894   return NULL;
00895 }
00896 
00901 void NWidgetContainer::Add(NWidgetBase *wid)
00902 {
00903   assert(wid->next == NULL && wid->prev == NULL);
00904 
00905   if (this->head == NULL) {
00906     this->head = wid;
00907     this->tail = wid;
00908   } else {
00909     assert(this->tail != NULL);
00910     assert(this->tail->next == NULL);
00911 
00912     this->tail->next = wid;
00913     wid->prev = this->tail;
00914     this->tail = wid;
00915   }
00916 }
00917 
00918 void NWidgetContainer::FillNestedArray(NWidgetBase **array, uint length)
00919 {
00920   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
00921     child_wid->FillNestedArray(array, length);
00922   }
00923 }
00924 
00928 NWidgetStacked::NWidgetStacked() : NWidgetContainer(NWID_SELECTION)
00929 {
00930   this->index = -1;
00931 }
00932 
00933 void NWidgetStacked::SetIndex(int index)
00934 {
00935   this->index = index;
00936 }
00937 
00938 void NWidgetStacked::SetupSmallestSize(Window *w, bool init_array)
00939 {
00940   if (this->index >= 0 && init_array) { // Fill w->nested_array[]
00941     assert(w->nested_array_size > (uint)this->index);
00942     w->nested_array[this->index] = this;
00943   }
00944 
00945   /* Zero size plane selected */
00946   if (this->shown_plane >= SZSP_BEGIN) {
00947     Dimension size    = {0, 0};
00948     Dimension padding = {0, 0};
00949     Dimension fill    = {(this->shown_plane == SZSP_HORIZONTAL), (this->shown_plane == SZSP_VERTICAL)};
00950     Dimension resize  = {(this->shown_plane == SZSP_HORIZONTAL), (this->shown_plane == SZSP_VERTICAL)};
00951     /* Here we're primarily interested in the value of resize */
00952     if (this->index >= 0) w->UpdateWidgetSize(this->index, &size, padding, &fill, &resize);
00953 
00954     this->smallest_x = size.width;
00955     this->smallest_y = size.height;
00956     this->fill_x = fill.width;
00957     this->fill_y = fill.height;
00958     this->resize_x = resize.width;
00959     this->resize_y = resize.height;
00960     return;
00961   }
00962 
00963   /* First sweep, recurse down and compute minimal size and filling. */
00964   this->smallest_x = 0;
00965   this->smallest_y = 0;
00966   this->fill_x = (this->head != NULL) ? 1 : 0;
00967   this->fill_y = (this->head != NULL) ? 1 : 0;
00968   this->resize_x = (this->head != NULL) ? 1 : 0;
00969   this->resize_y = (this->head != NULL) ? 1 : 0;
00970   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
00971     child_wid->SetupSmallestSize(w, init_array);
00972 
00973     this->smallest_x = max(this->smallest_x, child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right);
00974     this->smallest_y = max(this->smallest_y, child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom);
00975     this->fill_x = LeastCommonMultiple(this->fill_x, child_wid->fill_x);
00976     this->fill_y = LeastCommonMultiple(this->fill_y, child_wid->fill_y);
00977     this->resize_x = LeastCommonMultiple(this->resize_x, child_wid->resize_x);
00978     this->resize_y = LeastCommonMultiple(this->resize_y, child_wid->resize_y);
00979   }
00980 }
00981 
00982 void NWidgetStacked::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
00983 {
00984   assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
00985   this->StoreSizePosition(sizing, x, y, given_width, given_height);
00986 
00987   if (this->shown_plane >= SZSP_BEGIN) return;
00988 
00989   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
00990     uint hor_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetHorizontalStepSize(sizing);
00991     uint child_width = ComputeMaxSize(child_wid->smallest_x, given_width - child_wid->padding_left - child_wid->padding_right, hor_step);
00992     uint child_pos_x = (rtl ? child_wid->padding_right : child_wid->padding_left);
00993 
00994     uint vert_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetVerticalStepSize(sizing);
00995     uint child_height = ComputeMaxSize(child_wid->smallest_y, given_height - child_wid->padding_top - child_wid->padding_bottom, vert_step);
00996     uint child_pos_y = child_wid->padding_top;
00997 
00998     child_wid->AssignSizePosition(sizing, x + child_pos_x, y + child_pos_y, child_width, child_height, rtl);
00999   }
01000 }
01001 
01002 void NWidgetStacked::FillNestedArray(NWidgetBase **array, uint length)
01003 {
01004   if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
01005   NWidgetContainer::FillNestedArray(array, length);
01006 }
01007 
01008 void NWidgetStacked::Draw(const Window *w)
01009 {
01010   if (this->shown_plane >= SZSP_BEGIN) return;
01011 
01012   int plane = 0;
01013   for (NWidgetBase *child_wid = this->head; child_wid != NULL; plane++, child_wid = child_wid->next) {
01014     if (plane == this->shown_plane) {
01015       child_wid->Draw(w);
01016       return;
01017     }
01018   }
01019 
01020   NOT_REACHED();
01021 }
01022 
01023 NWidgetCore *NWidgetStacked::GetWidgetFromPos(int x, int y)
01024 {
01025   if (this->shown_plane >= SZSP_BEGIN) return NULL;
01026 
01027   if (!IsInsideBS(x, this->pos_x, this->current_x) || !IsInsideBS(y, this->pos_y, this->current_y)) return NULL;
01028   int plane = 0;
01029   for (NWidgetBase *child_wid = this->head; child_wid != NULL; plane++, child_wid = child_wid->next) {
01030     if (plane == this->shown_plane) {
01031       return child_wid->GetWidgetFromPos(x, y);
01032     }
01033   }
01034   return NULL;
01035 }
01036 
01041 void NWidgetStacked::SetDisplayedPlane(int plane)
01042 {
01043   this->shown_plane = plane;
01044 }
01045 
01046 NWidgetPIPContainer::NWidgetPIPContainer(WidgetType tp, NWidContainerFlags flags) : NWidgetContainer(tp)
01047 {
01048   this->flags = flags;
01049 }
01050 
01060 void NWidgetPIPContainer::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
01061 {
01062   this->pip_pre = pip_pre;
01063   this->pip_inter = pip_inter;
01064   this->pip_post = pip_post;
01065 }
01066 
01067 void NWidgetPIPContainer::Draw(const Window *w)
01068 {
01069   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01070     child_wid->Draw(w);
01071   }
01072 }
01073 
01074 NWidgetCore *NWidgetPIPContainer::GetWidgetFromPos(int x, int y)
01075 {
01076   if (!IsInsideBS(x, this->pos_x, this->current_x) || !IsInsideBS(y, this->pos_y, this->current_y)) return NULL;
01077 
01078   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01079     NWidgetCore *nwid = child_wid->GetWidgetFromPos(x, y);
01080     if (nwid != NULL) return nwid;
01081   }
01082   return NULL;
01083 }
01084 
01086 NWidgetHorizontal::NWidgetHorizontal(NWidContainerFlags flags) : NWidgetPIPContainer(NWID_HORIZONTAL, flags)
01087 {
01088 }
01089 
01090 void NWidgetHorizontal::SetupSmallestSize(Window *w, bool init_array)
01091 {
01092   this->smallest_x = 0; // Sum of minimal size of all children.
01093   this->smallest_y = 0; // Biggest child.
01094   this->fill_x = 0;     // smallest non-zero child widget fill step.
01095   this->fill_y = 1;     // smallest common child fill step.
01096   this->resize_x = 0;   // smallest non-zero child widget resize step.
01097   this->resize_y = 1;   // smallest common child resize step.
01098 
01099   /* 1a. Forward call, collect biggest nested array index, and longest/widest child length. */
01100   uint longest = 0; // Longest child found.
01101   uint max_vert_fill = 0; // Biggest vertical fill step.
01102   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01103     child_wid->SetupSmallestSize(w, init_array);
01104     longest = max(longest, child_wid->smallest_x);
01105     max_vert_fill = max(max_vert_fill, child_wid->GetVerticalStepSize(ST_SMALLEST));
01106     this->smallest_y = max(this->smallest_y, child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom);
01107   }
01108   /* 1b. Make the container higher if needed to accommodate all children nicely. */
01109   uint max_smallest = this->smallest_y + 3 * max_vert_fill; // Upper limit to computing smallest height.
01110   uint cur_height = this->smallest_y;
01111   for (;;) {
01112     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01113       uint step_size = child_wid->GetVerticalStepSize(ST_SMALLEST);
01114       uint child_height = child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom;
01115       if (step_size > 1 && child_height < cur_height) { // Small step sizes or already fitting children are not interesting.
01116         uint remainder = (cur_height - child_height) % step_size;
01117         if (remainder > 0) { // Child did not fit entirely, widen the container.
01118           cur_height += step_size - remainder;
01119           assert(cur_height < max_smallest); // Safeguard against infinite height expansion.
01120           /* Remaining children will adapt to the new cur_height, thus speeding up the computation. */
01121         }
01122       }
01123     }
01124     if (this->smallest_y == cur_height) break;
01125     this->smallest_y = cur_height; // Smallest height got changed, try again.
01126   }
01127   /* 2. For containers that must maintain equal width, extend child minimal size. */
01128   if (this->flags & NC_EQUALSIZE) {
01129     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01130       if (child_wid->fill_x == 1) child_wid->smallest_x = longest;
01131     }
01132   }
01133   /* 3. Move PIP space to the children, compute smallest, fill, and resize values of the container. */
01134   if (this->head != NULL) this->head->padding_left += this->pip_pre;
01135   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01136     if (child_wid->next != NULL) {
01137       child_wid->padding_right += this->pip_inter;
01138     } else {
01139       child_wid->padding_right += this->pip_post;
01140     }
01141 
01142     this->smallest_x += child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right;
01143     if (child_wid->fill_x > 0) {
01144       if (this->fill_x == 0 || this->fill_x > child_wid->fill_x) this->fill_x = child_wid->fill_x;
01145     }
01146     this->fill_y = LeastCommonMultiple(this->fill_y, child_wid->fill_y);
01147 
01148     if (child_wid->resize_x > 0) {
01149       if (this->resize_x == 0 || this->resize_x > child_wid->resize_x) this->resize_x = child_wid->resize_x;
01150     }
01151     this->resize_y = LeastCommonMultiple(this->resize_y, child_wid->resize_y);
01152   }
01153   /* We need to zero the PIP settings so we can re-initialize the tree. */
01154   this->pip_pre = this->pip_inter = this->pip_post = 0;
01155 }
01156 
01157 void NWidgetHorizontal::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
01158 {
01159   assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
01160 
01161   /* Compute additional width given to us. */
01162   uint additional_length = given_width;
01163   if (sizing == ST_SMALLEST && (this->flags & NC_EQUALSIZE)) {
01164     /* For EQUALSIZE containers this does not sum to smallest_x during initialisation */
01165     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01166       additional_length -= child_wid->smallest_x + child_wid->padding_right + child_wid->padding_left;
01167     }
01168   } else {
01169     additional_length -= this->smallest_x;
01170   }
01171 
01172   this->StoreSizePosition(sizing, x, y, given_width, given_height);
01173 
01174   /* In principle, the additional horizontal space is distributed evenly over the available resizable children. Due to step sizes, this may not always be feasible.
01175    * To make resizing work as good as possible, first children with biggest step sizes are done. These may get less due to rounding down.
01176    * This additional space is then given to children with smaller step sizes. This will give a good result when resize steps of each child is a multiple
01177    * of the child with the smallest non-zero stepsize.
01178    *
01179    * Since child sizes are computed out of order, positions cannot be calculated until all sizes are known. That means it is not possible to compute the child
01180    * size and position, and directly call child->AssignSizePosition() with the computed values.
01181    * Instead, computed child widths and heights are stored in child->current_x and child->current_y values. That is allowed, since this method overwrites those values
01182    * then we call the child.
01183    */
01184 
01185   /* First loop: Find biggest stepsize, find number of children that want a piece of the pie, handle vertical size for all children,
01186    * handle horizontal size for non-resizing children.
01187    */
01188   int num_changing_childs = 0; // Number of children that can change size.
01189   uint biggest_stepsize = 0;
01190   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01191     uint hor_step = child_wid->GetHorizontalStepSize(sizing);
01192     if (hor_step > 0) {
01193       num_changing_childs++;
01194       biggest_stepsize = max(biggest_stepsize, hor_step);
01195     } else {
01196       child_wid->current_x = child_wid->smallest_x;
01197     }
01198 
01199     uint vert_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetVerticalStepSize(sizing);
01200     child_wid->current_y = ComputeMaxSize(child_wid->smallest_y, given_height - child_wid->padding_top - child_wid->padding_bottom, vert_step);
01201   }
01202 
01203   /* Second loop: Allocate the additional horizontal space over the resizing children, starting with the biggest resize steps. */
01204   while (biggest_stepsize > 0) {
01205     uint next_biggest_stepsize = 0;
01206     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01207       uint hor_step = child_wid->GetHorizontalStepSize(sizing);
01208       if (hor_step > biggest_stepsize) continue; // Already done
01209       if (hor_step == biggest_stepsize) {
01210         uint increment = additional_length / num_changing_childs;
01211         num_changing_childs--;
01212         if (hor_step > 1) increment -= increment % hor_step;
01213         child_wid->current_x = child_wid->smallest_x + increment;
01214         additional_length -= increment;
01215         continue;
01216       }
01217       next_biggest_stepsize = max(next_biggest_stepsize, hor_step);
01218     }
01219     biggest_stepsize = next_biggest_stepsize;
01220   }
01221   assert(num_changing_childs == 0);
01222 
01223   /* Third loop: Compute position and call the child. */
01224   uint position = 0; // Place to put next child relative to origin of the container.
01225   NWidgetBase *child_wid = rtl ? this->tail : this->head;
01226   while (child_wid != NULL) {
01227     uint child_width = child_wid->current_x;
01228     uint child_x = x + position + (rtl ? child_wid->padding_right : child_wid->padding_left);
01229     uint child_y = y + child_wid->padding_top;
01230 
01231     child_wid->AssignSizePosition(sizing, child_x, child_y, child_width, child_wid->current_y, rtl);
01232     position += child_width + child_wid->padding_right + child_wid->padding_left;
01233 
01234     child_wid = rtl ? child_wid->prev : child_wid->next;
01235   }
01236 }
01237 
01239 NWidgetHorizontalLTR::NWidgetHorizontalLTR(NWidContainerFlags flags) : NWidgetHorizontal(flags)
01240 {
01241   this->type = NWID_HORIZONTAL_LTR;
01242 }
01243 
01244 void NWidgetHorizontalLTR::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
01245 {
01246   NWidgetHorizontal::AssignSizePosition(sizing, x, y, given_width, given_height, false);
01247 }
01248 
01250 NWidgetVertical::NWidgetVertical(NWidContainerFlags flags) : NWidgetPIPContainer(NWID_VERTICAL, flags)
01251 {
01252 }
01253 
01254 void NWidgetVertical::SetupSmallestSize(Window *w, bool init_array)
01255 {
01256   this->smallest_x = 0; // Biggest child.
01257   this->smallest_y = 0; // Sum of minimal size of all children.
01258   this->fill_x = 1;     // smallest common child fill step.
01259   this->fill_y = 0;     // smallest non-zero child widget fill step.
01260   this->resize_x = 1;   // smallest common child resize step.
01261   this->resize_y = 0;   // smallest non-zero child widget resize step.
01262 
01263   /* 1a. Forward call, collect biggest nested array index, and longest/widest child length. */
01264   uint highest = 0; // Highest child found.
01265   uint max_hor_fill = 0; // Biggest horizontal fill step.
01266   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01267     child_wid->SetupSmallestSize(w, init_array);
01268     highest = max(highest, child_wid->smallest_y);
01269     max_hor_fill = max(max_hor_fill, child_wid->GetHorizontalStepSize(ST_SMALLEST));
01270     this->smallest_x = max(this->smallest_x, child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right);
01271   }
01272   /* 1b. Make the container wider if needed to accommodate all children nicely. */
01273   uint max_smallest = this->smallest_x + 3 * max_hor_fill; // Upper limit to computing smallest height.
01274   uint cur_width = this->smallest_x;
01275   for (;;) {
01276     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01277       uint step_size = child_wid->GetHorizontalStepSize(ST_SMALLEST);
01278       uint child_width = child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right;
01279       if (step_size > 1 && child_width < cur_width) { // Small step sizes or already fitting children are not interesting.
01280         uint remainder = (cur_width - child_width) % step_size;
01281         if (remainder > 0) { // Child did not fit entirely, widen the container.
01282           cur_width += step_size - remainder;
01283           assert(cur_width < max_smallest); // Safeguard against infinite width expansion.
01284           /* Remaining children will adapt to the new cur_width, thus speeding up the computation. */
01285         }
01286       }
01287     }
01288     if (this->smallest_x == cur_width) break;
01289     this->smallest_x = cur_width; // Smallest width got changed, try again.
01290   }
01291   /* 2. For containers that must maintain equal width, extend children minimal size. */
01292   if (this->flags & NC_EQUALSIZE) {
01293     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01294       if (child_wid->fill_y == 1) child_wid->smallest_y = highest;
01295     }
01296   }
01297   /* 3. Move PIP space to the child, compute smallest, fill, and resize values of the container. */
01298   if (this->head != NULL) this->head->padding_top += this->pip_pre;
01299   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01300     if (child_wid->next != NULL) {
01301       child_wid->padding_bottom += this->pip_inter;
01302     } else {
01303       child_wid->padding_bottom += this->pip_post;
01304     }
01305 
01306     this->smallest_y += child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom;
01307     if (child_wid->fill_y > 0) {
01308       if (this->fill_y == 0 || this->fill_y > child_wid->fill_y) this->fill_y = child_wid->fill_y;
01309     }
01310     this->fill_x = LeastCommonMultiple(this->fill_x, child_wid->fill_x);
01311 
01312     if (child_wid->resize_y > 0) {
01313       if (this->resize_y == 0 || this->resize_y > child_wid->resize_y) this->resize_y = child_wid->resize_y;
01314     }
01315     this->resize_x = LeastCommonMultiple(this->resize_x, child_wid->resize_x);
01316   }
01317   /* We need to zero the PIP settings so we can re-initialize the tree. */
01318   this->pip_pre = this->pip_inter = this->pip_post = 0;
01319 }
01320 
01321 void NWidgetVertical::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
01322 {
01323   assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
01324 
01325   /* Compute additional height given to us. */
01326   uint additional_length = given_height;
01327   if (sizing == ST_SMALLEST && (this->flags & NC_EQUALSIZE)) {
01328     /* For EQUALSIZE containers this does not sum to smallest_y during initialisation */
01329     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01330       additional_length -= child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom;
01331     }
01332   } else {
01333     additional_length -= this->smallest_y;
01334   }
01335 
01336   this->StoreSizePosition(sizing, x, y, given_width, given_height);
01337 
01338   /* Like the horizontal container, the vertical container also distributes additional height evenly, starting with the children with the biggest resize steps.
01339    * It also stores computed widths and heights into current_x and current_y values of the child.
01340    */
01341 
01342   /* First loop: Find biggest stepsize, find number of children that want a piece of the pie, handle horizontal size for all children, handle vertical size for non-resizing child. */
01343   int num_changing_childs = 0; // Number of children that can change size.
01344   uint biggest_stepsize = 0;
01345   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01346     uint vert_step = child_wid->GetVerticalStepSize(sizing);
01347     if (vert_step > 0) {
01348       num_changing_childs++;
01349       biggest_stepsize = max(biggest_stepsize, vert_step);
01350     } else {
01351       child_wid->current_y = child_wid->smallest_y;
01352     }
01353 
01354     uint hor_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetHorizontalStepSize(sizing);
01355     child_wid->current_x = ComputeMaxSize(child_wid->smallest_x, given_width - child_wid->padding_left - child_wid->padding_right, hor_step);
01356   }
01357 
01358   /* Second loop: Allocate the additional vertical space over the resizing children, starting with the biggest resize steps. */
01359   while (biggest_stepsize > 0) {
01360     uint next_biggest_stepsize = 0;
01361     for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01362       uint vert_step = child_wid->GetVerticalStepSize(sizing);
01363       if (vert_step > biggest_stepsize) continue; // Already done
01364       if (vert_step == biggest_stepsize) {
01365         uint increment = additional_length / num_changing_childs;
01366         num_changing_childs--;
01367         if (vert_step > 1) increment -= increment % vert_step;
01368         child_wid->current_y = child_wid->smallest_y + increment;
01369         additional_length -= increment;
01370         continue;
01371       }
01372       next_biggest_stepsize = max(next_biggest_stepsize, vert_step);
01373     }
01374     biggest_stepsize = next_biggest_stepsize;
01375   }
01376   assert(num_changing_childs == 0);
01377 
01378   /* Third loop: Compute position and call the child. */
01379   uint position = 0; // Place to put next child relative to origin of the container.
01380   for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
01381     uint child_x = x + (rtl ? child_wid->padding_right : child_wid->padding_left);
01382     uint child_height = child_wid->current_y;
01383 
01384     child_wid->AssignSizePosition(sizing, child_x, y + position + child_wid->padding_top, child_wid->current_x, child_height, rtl);
01385     position += child_height + child_wid->padding_top + child_wid->padding_bottom;
01386   }
01387 }
01388 
01394 NWidgetSpacer::NWidgetSpacer(int length, int height) : NWidgetResizeBase(NWID_SPACER, 0, 0)
01395 {
01396   this->SetMinimalSize(length, height);
01397   this->SetResize(0, 0);
01398 }
01399 
01400 void NWidgetSpacer::SetupSmallestSize(Window *w, bool init_array)
01401 {
01402   this->smallest_x = this->min_x;
01403   this->smallest_y = this->min_y;
01404 }
01405 
01406 void NWidgetSpacer::FillNestedArray(NWidgetBase **array, uint length)
01407 {
01408 }
01409 
01410 void NWidgetSpacer::Draw(const Window *w)
01411 {
01412   /* Spacer widget is never visible. */
01413 }
01414 
01415 void NWidgetSpacer::SetDirty(const Window *w) const
01416 {
01417   /* Spacer widget never need repainting. */
01418 }
01419 
01420 NWidgetCore *NWidgetSpacer::GetWidgetFromPos(int x, int y)
01421 {
01422   return NULL;
01423 }
01424 
01425 NWidgetMatrix::NWidgetMatrix() : NWidgetPIPContainer(NWID_MATRIX, NC_EQUALSIZE), index(-1), clicked(-1), count(-1)
01426 {
01427 }
01428 
01429 void NWidgetMatrix::SetIndex(int index)
01430 {
01431   this->index = index;
01432 }
01433 
01434 void NWidgetMatrix::SetColour(Colours colour)
01435 {
01436   this->colour = colour;
01437 }
01438 
01443 void NWidgetMatrix::SetClicked(int clicked)
01444 {
01445   this->clicked = clicked;
01446   if (this->clicked >= 0 && this->sb != NULL && this->widgets_x != 0) {
01447     int vpos = (this->clicked / this->widgets_x) * this->widget_h; // Vertical position of the top.
01448     /* Need to scroll down -> Scroll to the bottom.
01449      * However, last entry has no 'this->pip_inter' underneath, and we must stay below this->sb->GetCount() */
01450     if (this->sb->GetPosition() < vpos) vpos += this->widget_h - this->pip_inter - 1;
01451     this->sb->ScrollTowards(vpos);
01452   }
01453 }
01454 
01460 void NWidgetMatrix::SetCount(int count)
01461 {
01462   this->count = count;
01463 
01464   if (this->sb == NULL || this->widgets_x == 0) return;
01465 
01466   /* We need to get the number of pixels the matrix is high/wide.
01467    * So, determine the number of rows/columns based on the number of
01468    * columns/rows (one is constant/unscrollable).
01469    * Then multiply that by the height of a widget, and add the pre
01470    * and post spacing "offsets". */
01471   count = CeilDiv(count, this->sb->IsVertical() ? this->widgets_x : this->widgets_y);
01472   count *= (this->sb->IsVertical() ? this->head->smallest_y : this->head->smallest_x) + this->pip_inter;
01473   count += -this->pip_inter + this->pip_pre + this->pip_post; // We counted an inter too much in the multiplication above
01474   this->sb->SetCount(count);
01475   this->sb->SetCapacity(this->sb->IsVertical() ? this->current_y : this->current_x);
01476   this->sb->SetStepSize(this->sb->IsVertical() ? this->widget_h  : this->widget_w);
01477 }
01478 
01483 void NWidgetMatrix::SetScrollbar(Scrollbar *sb)
01484 {
01485   this->sb = sb;
01486 }
01487 
01488 void NWidgetMatrix::SetupSmallestSize(Window *w, bool init_array)
01489 {
01490   assert(this->head != NULL);
01491   assert(this->head->next == NULL);
01492 
01493   if (this->index >= 0 && init_array) { // Fill w->nested_array[]
01494     assert(w->nested_array_size > (uint)this->index);
01495     w->nested_array[this->index] = this;
01496   }
01497 
01498   /* Reset the widget number. */
01499   SB(dynamic_cast<NWidgetCore *>(this->head)->index, 16, 16, 0);
01500   this->head->SetupSmallestSize(w, init_array);
01501 
01502   Dimension padding = {this->pip_pre + this->pip_post, this->pip_pre + this->pip_post};
01503   Dimension size    = {this->head->smallest_x + padding.width, this->head->smallest_y + padding.height};
01504   Dimension fill    = {0, 0};
01505   Dimension resize  = {this->pip_inter + this->head->smallest_x, this->pip_inter + this->head->smallest_y};
01506 
01507   if (this->index >= 0) w->UpdateWidgetSize(this->index, &size, padding, &fill, &resize);
01508 
01509   this->smallest_x = size.width;
01510   this->smallest_y = size.height;
01511   this->fill_x = fill.width;
01512   this->fill_y = fill.height;
01513   this->resize_x = resize.width;
01514   this->resize_y = resize.height;
01515 }
01516 
01517 void NWidgetMatrix::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
01518 {
01519   assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
01520 
01521   this->pos_x = x;
01522   this->pos_y = y;
01523   this->current_x = given_width;
01524   this->current_y = given_height;
01525 
01526   /* Determine the size of the widgets, and the number of visible widgets on each of the axis. */
01527   this->widget_w = this->head->smallest_x + this->pip_inter;
01528   this->widget_h = this->head->smallest_y + this->pip_inter;
01529 
01530   /* Account for the pip_inter is between widgets, so we need to account for that when
01531    * the division assumes pip_inter is used for all widgets. */
01532   this->widgets_x = CeilDiv(this->current_x - this->pip_pre - this->pip_post + this->pip_inter, this->widget_w);
01533   this->widgets_y = CeilDiv(this->current_y - this->pip_pre - this->pip_post + this->pip_inter, this->widget_h);
01534 
01535   /* When resizing, update the scrollbar's count. E.g. with a vertical
01536    * scrollbar becoming wider or narrower means the amount of rows in
01537    * the scrollbar becomes respectively smaller or higher. */
01538   this->SetCount(this->count);
01539 }
01540 
01541 void NWidgetMatrix::FillNestedArray(NWidgetBase **array, uint length)
01542 {
01543   if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
01544   NWidgetContainer::FillNestedArray(array, length);
01545 }
01546 
01547 NWidgetCore *NWidgetMatrix::GetWidgetFromPos(int x, int y)
01548 {
01549   /* Falls outside of the matrix widget. */
01550   if (!IsInsideBS(x, this->pos_x, this->current_x) || !IsInsideBS(y, this->pos_y, this->current_y)) return NULL;
01551 
01552   int start_x, start_y, base_offs_x, base_offs_y;
01553   this->GetScrollOffsets(start_x, start_y, base_offs_x, base_offs_y);
01554 
01555   /* Swap the x offset around for RTL, so it'll behave like LTR for RTL as well. */
01556   bool rtl = _current_text_dir == TD_RTL;
01557   if (rtl) base_offs_x -= (this->widgets_x - 1) * this->widget_w;
01558 
01559   int widget_col = (x - base_offs_x - (int)this->pip_pre - (int)this->pos_x) / this->widget_w;
01560   int widget_row = (y - base_offs_y - (int)this->pip_pre - (int)this->pos_y) / this->widget_h;
01561 
01562   if (widget_row * this->widgets_x + widget_col >= this->count) return NULL;
01563 
01564   NWidgetCore *child = dynamic_cast<NWidgetCore *>(this->head);
01565   child->AssignSizePosition(ST_RESIZE,
01566       this->pos_x + this->pip_pre + widget_col * this->widget_w + base_offs_x,
01567       this->pos_y + this->pip_pre + widget_row * this->widget_h + base_offs_y,
01568       child->smallest_x, child->smallest_y, rtl);
01569 
01570   /* "Undo" the RTL swap here to get the right widget index. */
01571   if (rtl) widget_col = this->widgets_x - widget_col - 1;
01572   SB(child->index, 16, 16, (widget_row + start_y) * this->widgets_x + widget_col + start_x);
01573 
01574   return child->GetWidgetFromPos(x, y);
01575 }
01576 
01577 /* virtual */ void NWidgetMatrix::Draw(const Window *w)
01578 {
01579   /* Fill the background. */
01580   GfxFillRect(this->pos_x, this->pos_y, this->pos_x + this->current_x - 1, this->pos_y + this->current_y - 1, _colour_gradient[this->colour & 0xF][5]);
01581 
01582   /* Set up a clipping area for the previews. */
01583   DrawPixelInfo tmp_dpi;
01584   if (!FillDrawPixelInfo(&tmp_dpi, this->pos_x + this->pip_pre, this->pos_y + this->pip_pre, this->current_x - this->pip_pre - this->pip_post, this->current_y - this->pip_pre - this->pip_post)) return;
01585   DrawPixelInfo *old_dpi = _cur_dpi;
01586   _cur_dpi = &tmp_dpi;
01587 
01588   /* Get the appropriate offsets so we can draw the right widgets. */
01589   NWidgetCore *child = dynamic_cast<NWidgetCore *>(this->head);
01590   bool rtl = _current_text_dir == TD_RTL;
01591   int start_x, start_y, base_offs_x, base_offs_y;
01592   this->GetScrollOffsets(start_x, start_y, base_offs_x, base_offs_y);
01593 
01594   int offs_y = base_offs_y;
01595   for (int y = start_y; y < start_y + this->widgets_y + 1; y++, offs_y += this->widget_h) {
01596     /* Are we within bounds? */
01597     if (offs_y + child->smallest_y <= 0) continue;
01598     if (offs_y >= (int)this->current_y) break;
01599 
01600     /* We've passed our amount of widgets. */
01601     if (y * this->widgets_x >= this->count) break;
01602 
01603     int offs_x = base_offs_x;
01604     for (int x = start_x; x < start_x + this->widgets_x + 1; x++, offs_x += rtl ? -this->widget_w : this->widget_w) {
01605       /* Are we within bounds? */
01606       if (offs_x + child->smallest_x <= 0) continue;
01607       if (offs_x >= (int)this->current_x) continue;
01608 
01609       /* Do we have this many widgets? */
01610       int sub_wid = y * this->widgets_x + x;
01611       if (sub_wid >= this->count) break;
01612 
01613       child->AssignSizePosition(ST_RESIZE, offs_x, offs_y, child->smallest_x, child->smallest_y, rtl);
01614       child->SetLowered(this->clicked == sub_wid);
01615       SB(child->index, 16, 16, sub_wid);
01616       child->Draw(w);
01617     }
01618   }
01619 
01620   /* Restore the clipping area. */
01621   _cur_dpi = old_dpi;
01622 }
01623 
01631 void NWidgetMatrix::GetScrollOffsets(int &start_x, int &start_y, int &base_offs_x, int &base_offs_y)
01632 {
01633   base_offs_x = 0;
01634   base_offs_y = 0;
01635   start_x = 0;
01636   start_y = 0;
01637   if (this->sb != NULL) {
01638     if (this->sb->IsVertical()) {
01639       start_y = this->sb->GetPosition() / this->widget_h;
01640       base_offs_y = -this->sb->GetPosition() + start_y * this->widget_h;
01641       if (_current_text_dir == TD_RTL) base_offs_x = this->pip_pre + this->widget_w * (this->widgets_x - 1) - this->pip_inter;
01642     } else {
01643       start_x = this->sb->GetPosition() / this->widget_w;
01644       if (_current_text_dir == TD_RTL) {
01645         base_offs_x = this->sb->GetCapacity() + this->sb->GetPosition() - (start_x + 1) * this->widget_w + this->pip_inter - this->pip_post - this->pip_pre;
01646       } else {
01647         base_offs_x = -this->sb->GetPosition() + start_x * this->widget_w;
01648       }
01649     }
01650   }
01651 }
01652 
01662 NWidgetBackground::NWidgetBackground(WidgetType tp, Colours colour, int index, NWidgetPIPContainer *child) : NWidgetCore(tp, colour, 1, 1, 0x0, STR_NULL)
01663 {
01664   assert(tp == WWT_PANEL || tp == WWT_INSET || tp == WWT_FRAME);
01665   if (index >= 0) this->SetIndex(index);
01666   this->child = child;
01667 }
01668 
01669 NWidgetBackground::~NWidgetBackground()
01670 {
01671   if (this->child != NULL) delete this->child;
01672 }
01673 
01681 void NWidgetBackground::Add(NWidgetBase *nwid)
01682 {
01683   if (this->child == NULL) {
01684     this->child = new NWidgetVertical();
01685   }
01686   this->child->Add(nwid);
01687 }
01688 
01699 void NWidgetBackground::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
01700 {
01701   if (this->child == NULL) {
01702     this->child = new NWidgetVertical();
01703   }
01704   this->child->SetPIP(pip_pre, pip_inter, pip_post);
01705 }
01706 
01707 void NWidgetBackground::SetupSmallestSize(Window *w, bool init_array)
01708 {
01709   if (init_array && this->index >= 0) {
01710     assert(w->nested_array_size > (uint)this->index);
01711     w->nested_array[this->index] = this;
01712   }
01713   if (this->child != NULL) {
01714     this->child->SetupSmallestSize(w, init_array);
01715 
01716     this->smallest_x = this->child->smallest_x;
01717     this->smallest_y = this->child->smallest_y;
01718     this->fill_x = this->child->fill_x;
01719     this->fill_y = this->child->fill_y;
01720     this->resize_x = this->child->resize_x;
01721     this->resize_y = this->child->resize_y;
01722 
01723     /* Account for the size of the frame's text if that exists */
01724     if (w != NULL && this->type == WWT_FRAME) {
01725       this->child->padding_left   = WD_FRAMETEXT_LEFT;
01726       this->child->padding_right  = WD_FRAMETEXT_RIGHT;
01727       this->child->padding_top    = max((int)WD_FRAMETEXT_TOP, this->widget_data != STR_NULL ? FONT_HEIGHT_NORMAL + WD_FRAMETEXT_TOP / 2 : 0);
01728       this->child->padding_bottom = WD_FRAMETEXT_BOTTOM;
01729 
01730       this->smallest_x += this->child->padding_left + this->child->padding_right;
01731       this->smallest_y += this->child->padding_top + this->child->padding_bottom;
01732 
01733       if (this->index >= 0) w->SetStringParameters(this->index);
01734       this->smallest_x = max(this->smallest_x, GetStringBoundingBox(this->widget_data).width + WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT);
01735     }
01736   } else {
01737     Dimension d = {this->min_x, this->min_y};
01738     Dimension fill = {this->fill_x, this->fill_y};
01739     Dimension resize  = {this->resize_x, this->resize_y};
01740     if (w != NULL) { // A non-NULL window pointer acts as switch to turn dynamic widget size on.
01741       if (this->type == WWT_FRAME || this->type == WWT_INSET) {
01742         if (this->index >= 0) w->SetStringParameters(this->index);
01743         Dimension background = GetStringBoundingBox(this->widget_data);
01744         background.width += (this->type == WWT_FRAME) ? (WD_FRAMETEXT_LEFT + WD_FRAMERECT_RIGHT) : (WD_INSET_LEFT + WD_INSET_RIGHT);
01745         d = maxdim(d, background);
01746       }
01747       if (this->index >= 0) {
01748         static const Dimension padding = {0, 0};
01749         w->UpdateWidgetSize(this->index, &d, padding, &fill, &resize);
01750       }
01751     }
01752     this->smallest_x = d.width;
01753     this->smallest_y = d.height;
01754     this->fill_x = fill.width;
01755     this->fill_y = fill.height;
01756     this->resize_x = resize.width;
01757     this->resize_y = resize.height;
01758   }
01759 }
01760 
01761 void NWidgetBackground::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
01762 {
01763   this->StoreSizePosition(sizing, x, y, given_width, given_height);
01764 
01765   if (this->child != NULL) {
01766     uint x_offset = (rtl ? this->child->padding_right : this->child->padding_left);
01767     uint width = given_width - this->child->padding_right - this->child->padding_left;
01768     uint height = given_height - this->child->padding_top - this->child->padding_bottom;
01769     this->child->AssignSizePosition(sizing, x + x_offset, y + this->child->padding_top, width, height, rtl);
01770   }
01771 }
01772 
01773 void NWidgetBackground::FillNestedArray(NWidgetBase **array, uint length)
01774 {
01775   if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
01776   if (this->child != NULL) this->child->FillNestedArray(array, length);
01777 }
01778 
01779 void NWidgetBackground::Draw(const Window *w)
01780 {
01781   if (this->current_x == 0 || this->current_y == 0) return;
01782 
01783   Rect r;
01784   r.left = this->pos_x;
01785   r.right = this->pos_x + this->current_x - 1;
01786   r.top = this->pos_y;
01787   r.bottom = this->pos_y + this->current_y - 1;
01788 
01789   const DrawPixelInfo *dpi = _cur_dpi;
01790   if (dpi->left > r.right || dpi->left + dpi->width <= r.left || dpi->top > r.bottom || dpi->top + dpi->height <= r.top) return;
01791 
01792   switch (this->type) {
01793     case WWT_PANEL:
01794       assert(this->widget_data == 0);
01795       DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, this->IsLowered() ? FR_LOWERED : FR_NONE);
01796       break;
01797 
01798     case WWT_FRAME:
01799       if (this->index >= 0) w->SetStringParameters(this->index);
01800       DrawFrame(r, this->colour, this->widget_data);
01801       break;
01802 
01803     case WWT_INSET:
01804       if (this->index >= 0) w->SetStringParameters(this->index);
01805       DrawInset(r, this->colour, this->widget_data);
01806       break;
01807 
01808     default:
01809       NOT_REACHED();
01810   }
01811 
01812   if (this->index >= 0) w->DrawWidget(r, this->index);
01813   if (this->child != NULL) this->child->Draw(w);
01814 
01815   if (this->IsDisabled()) {
01816     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[this->colour & 0xF][2], FILLRECT_CHECKER);
01817   }
01818 }
01819 
01820 NWidgetCore *NWidgetBackground::GetWidgetFromPos(int x, int y)
01821 {
01822   NWidgetCore *nwid = NULL;
01823   if (IsInsideBS(x, this->pos_x, this->current_x) && IsInsideBS(y, this->pos_y, this->current_y)) {
01824     if (this->child != NULL) nwid = this->child->GetWidgetFromPos(x, y);
01825     if (nwid == NULL) nwid = this;
01826   }
01827   return nwid;
01828 }
01829 
01830 NWidgetBase *NWidgetBackground::GetWidgetOfType(WidgetType tp)
01831 {
01832   NWidgetBase *nwid = NULL;
01833   if (this->child != NULL) nwid = this->child->GetWidgetOfType(tp);
01834   if (nwid == NULL && this->type == tp) nwid = this;
01835   return nwid;
01836 }
01837 
01838 NWidgetViewport::NWidgetViewport(int index) : NWidgetCore(NWID_VIEWPORT, INVALID_COLOUR, 1, 1, 0x0, STR_NULL)
01839 {
01840   this->SetIndex(index);
01841 }
01842 
01843 void NWidgetViewport::SetupSmallestSize(Window *w, bool init_array)
01844 {
01845   if (init_array && this->index >= 0) {
01846     assert(w->nested_array_size > (uint)this->index);
01847     w->nested_array[this->index] = this;
01848   }
01849   this->smallest_x = this->min_x;
01850   this->smallest_y = this->min_y;
01851 }
01852 
01853 void NWidgetViewport::Draw(const Window *w)
01854 {
01855   if (this->disp_flags & ND_NO_TRANSPARENCY) {
01856     TransparencyOptionBits to_backup = _transparency_opt;
01857     _transparency_opt &= (1 << TO_SIGNS) | (1 << TO_LOADING); // Disable all transparency, except textual stuff
01858     w->DrawViewport();
01859     _transparency_opt = to_backup;
01860   } else {
01861     w->DrawViewport();
01862   }
01863 
01864   /* Optionally shade the viewport. */
01865   if (this->disp_flags & (ND_SHADE_GREY | ND_SHADE_DIMMED)) {
01866     GfxFillRect(this->pos_x, this->pos_y, this->pos_x + this->current_x - 1, this->pos_y + this->current_y - 1,
01867         (this->disp_flags & ND_SHADE_DIMMED) ? PALETTE_TO_TRANSPARENT : PALETTE_NEWSPAPER, FILLRECT_RECOLOUR);
01868   }
01869 }
01870 
01877 void NWidgetViewport::InitializeViewport(Window *w, uint32 follow_flags, ZoomLevel zoom)
01878 {
01879   InitializeWindowViewport(w, this->pos_x, this->pos_y, this->current_x, this->current_y, follow_flags, zoom);
01880 }
01881 
01886 void NWidgetViewport::UpdateViewportCoordinates(Window *w)
01887 {
01888   ViewPort *vp = w->viewport;
01889   if (vp != NULL) {
01890     vp->left = w->left + this->pos_x;
01891     vp->top  = w->top + this->pos_y;
01892     vp->width  = this->current_x;
01893     vp->height = this->current_y;
01894 
01895     vp->virtual_width  = ScaleByZoom(vp->width, vp->zoom);
01896     vp->virtual_height = ScaleByZoom(vp->height, vp->zoom);
01897   }
01898 }
01899 
01909 int Scrollbar::GetScrolledRowFromWidget(int clickpos, const Window * const w, int widget, int padding, int line_height) const
01910 {
01911   uint pos = w->GetRowFromWidget(clickpos, widget, padding, line_height);
01912   if (pos != INT_MAX) pos += this->GetPosition();
01913   return (pos >= this->GetCount()) ? INT_MAX : pos;
01914 }
01915 
01923 void Scrollbar::SetCapacityFromWidget(Window *w, int widget, int padding)
01924 {
01925   NWidgetBase *nwid = w->GetWidget<NWidgetBase>(widget);
01926   if (this->IsVertical()) {
01927     this->SetCapacity(((int)nwid->current_y - padding) / (int)nwid->resize_y);
01928   } else {
01929     this->SetCapacity(((int)nwid->current_x - padding) / (int)nwid->resize_x);
01930   }
01931 }
01932 
01939 NWidgetScrollbar::NWidgetScrollbar(WidgetType tp, Colours colour, int index) : NWidgetCore(tp, colour, 1, 1, 0x0, STR_NULL), Scrollbar(tp != NWID_HSCROLLBAR)
01940 {
01941   assert(tp == NWID_HSCROLLBAR || tp == NWID_VSCROLLBAR);
01942   this->SetIndex(index);
01943 
01944   switch (this->type) {
01945     case NWID_HSCROLLBAR:
01946       this->SetMinimalSize(0, NWidgetScrollbar::GetHorizontalDimension().height);
01947       this->SetResize(1, 0);
01948       this->SetFill(1, 0);
01949       this->SetDataTip(0x0, STR_TOOLTIP_HSCROLL_BAR_SCROLLS_LIST);
01950       break;
01951 
01952     case NWID_VSCROLLBAR:
01953       this->SetMinimalSize(NWidgetScrollbar::GetVerticalDimension().width, 0);
01954       this->SetResize(0, 1);
01955       this->SetFill(0, 1);
01956       this->SetDataTip(0x0, STR_TOOLTIP_VSCROLL_BAR_SCROLLS_LIST);
01957       break;
01958 
01959     default: NOT_REACHED();
01960   }
01961 }
01962 
01963 void NWidgetScrollbar::SetupSmallestSize(Window *w, bool init_array)
01964 {
01965   if (init_array && this->index >= 0) {
01966     assert(w->nested_array_size > (uint)this->index);
01967     w->nested_array[this->index] = this;
01968   }
01969   this->smallest_x = this->min_x;
01970   this->smallest_y = this->min_y;
01971 }
01972 
01973 void NWidgetScrollbar::Draw(const Window *w)
01974 {
01975   if (this->current_x == 0 || this->current_y == 0) return;
01976 
01977   Rect r;
01978   r.left = this->pos_x;
01979   r.right = this->pos_x + this->current_x - 1;
01980   r.top = this->pos_y;
01981   r.bottom = this->pos_y + this->current_y - 1;
01982 
01983   const DrawPixelInfo *dpi = _cur_dpi;
01984   if (dpi->left > r.right || dpi->left + dpi->width <= r.left || dpi->top > r.bottom || dpi->top + dpi->height <= r.top) return;
01985 
01986   bool up_lowered = HasBit(this->disp_flags, NDB_SCROLLBAR_UP);
01987   bool down_lowered = HasBit(this->disp_flags, NDB_SCROLLBAR_DOWN);
01988   bool middle_lowered = !(this->disp_flags & ND_SCROLLBAR_BTN) && w->scrolling_scrollbar == this->index;
01989 
01990   if (this->type == NWID_HSCROLLBAR) {
01991     DrawHorizontalScrollbar(r, this->colour, up_lowered, middle_lowered, down_lowered, this);
01992   } else {
01993     DrawVerticalScrollbar(r, this->colour, up_lowered, middle_lowered, down_lowered, this);
01994   }
01995 
01996   if (this->IsDisabled()) {
01997     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[this->colour & 0xF][2], FILLRECT_CHECKER);
01998   }
01999 }
02000 
02001 /* static */ void NWidgetScrollbar::InvalidateDimensionCache()
02002 {
02003   vertical_dimension.width   = vertical_dimension.height   = 0;
02004   horizontal_dimension.width = horizontal_dimension.height = 0;
02005 }
02006 
02007 /* static */ Dimension NWidgetScrollbar::GetVerticalDimension()
02008 {
02009   static const Dimension extra = {WD_SCROLLBAR_LEFT + WD_SCROLLBAR_RIGHT, WD_SCROLLBAR_TOP + WD_SCROLLBAR_BOTTOM};
02010   if (vertical_dimension.width == 0) {
02011     vertical_dimension = maxdim(GetSpriteSize(SPR_ARROW_UP), GetSpriteSize(SPR_ARROW_DOWN));
02012     vertical_dimension.width += extra.width;
02013     vertical_dimension.height += extra.height;
02014   }
02015   return vertical_dimension;
02016 }
02017 
02018 /* static */ Dimension NWidgetScrollbar::GetHorizontalDimension()
02019 {
02020   static const Dimension extra = {WD_SCROLLBAR_LEFT + WD_SCROLLBAR_RIGHT, WD_SCROLLBAR_TOP + WD_SCROLLBAR_BOTTOM};
02021   if (horizontal_dimension.width == 0) {
02022     horizontal_dimension = maxdim(GetSpriteSize(SPR_ARROW_LEFT), GetSpriteSize(SPR_ARROW_RIGHT));
02023     horizontal_dimension.width += extra.width;
02024     horizontal_dimension.height += extra.height;
02025   }
02026   return horizontal_dimension;
02027 }
02028 
02029 Dimension NWidgetScrollbar::vertical_dimension = {0, 0};
02030 Dimension NWidgetScrollbar::horizontal_dimension = {0, 0};
02031 
02033 /* static */ void NWidgetLeaf::InvalidateDimensionCache()
02034 {
02035   shadebox_dimension.width  = shadebox_dimension.height  = 0;
02036   debugbox_dimension.width  = debugbox_dimension.height  = 0;
02037   stickybox_dimension.width = stickybox_dimension.height = 0;
02038   resizebox_dimension.width = resizebox_dimension.height = 0;
02039   closebox_dimension.width  = closebox_dimension.height  = 0;
02040 }
02041 
02042 Dimension NWidgetLeaf::shadebox_dimension  = {0, 0};
02043 Dimension NWidgetLeaf::debugbox_dimension  = {0, 0};
02044 Dimension NWidgetLeaf::stickybox_dimension = {0, 0};
02045 Dimension NWidgetLeaf::resizebox_dimension = {0, 0};
02046 Dimension NWidgetLeaf::closebox_dimension  = {0, 0};
02047 
02056 NWidgetLeaf::NWidgetLeaf(WidgetType tp, Colours colour, int index, uint16 data, StringID tip) : NWidgetCore(tp, colour, 1, 1, data, tip)
02057 {
02058   assert(index >= 0 || tp == WWT_LABEL || tp == WWT_TEXT || tp == WWT_CAPTION || tp == WWT_RESIZEBOX || tp == WWT_SHADEBOX || tp == WWT_DEBUGBOX || tp == WWT_STICKYBOX || tp == WWT_CLOSEBOX);
02059   if (index >= 0) this->SetIndex(index);
02060   this->SetMinimalSize(0, 0);
02061   this->SetResize(0, 0);
02062 
02063   switch (tp) {
02064     case WWT_EMPTY:
02065       break;
02066 
02067     case WWT_PUSHBTN:
02068     case WWT_IMGBTN:
02069     case WWT_PUSHIMGBTN:
02070     case WWT_IMGBTN_2:
02071     case WWT_TEXTBTN:
02072     case WWT_PUSHTXTBTN:
02073     case WWT_TEXTBTN_2:
02074     case WWT_LABEL:
02075     case WWT_TEXT:
02076     case WWT_MATRIX:
02077     case NWID_BUTTON_DROPDOWN:
02078     case NWID_PUSHBUTTON_DROPDOWN:
02079     case WWT_ARROWBTN:
02080     case WWT_PUSHARROWBTN:
02081       this->SetFill(0, 0);
02082       break;
02083 
02084     case WWT_EDITBOX:
02085       this->SetMinimalSize(10, 0);
02086       this->SetFill(0, 0);
02087       break;
02088 
02089     case WWT_CAPTION:
02090       this->SetFill(1, 0);
02091       this->SetResize(1, 0);
02092       this->min_y = WD_CAPTION_HEIGHT;
02093       this->SetDataTip(data, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS);
02094       break;
02095 
02096     case WWT_STICKYBOX:
02097       this->SetFill(0, 0);
02098       this->SetMinimalSize(WD_STICKYBOX_WIDTH, WD_CAPTION_HEIGHT);
02099       this->SetDataTip(STR_NULL, STR_TOOLTIP_STICKY);
02100       break;
02101 
02102     case WWT_SHADEBOX:
02103       this->SetFill(0, 0);
02104       this->SetMinimalSize(WD_SHADEBOX_TOP, WD_CAPTION_HEIGHT);
02105       this->SetDataTip(STR_NULL, STR_TOOLTIP_SHADE);
02106       break;
02107 
02108     case WWT_DEBUGBOX:
02109       this->SetFill(0, 0);
02110       this->SetMinimalSize(WD_DEBUGBOX_TOP, WD_CAPTION_HEIGHT);
02111       this->SetDataTip(STR_NULL, STR_TOOLTIP_DEBUG);
02112       break;
02113 
02114     case WWT_RESIZEBOX:
02115       this->SetFill(0, 0);
02116       this->SetMinimalSize(WD_RESIZEBOX_WIDTH, 12);
02117       this->SetDataTip(STR_NULL, STR_TOOLTIP_RESIZE);
02118       break;
02119 
02120     case WWT_CLOSEBOX:
02121       this->SetFill(0, 0);
02122       this->SetMinimalSize(WD_CLOSEBOX_WIDTH, WD_CAPTION_HEIGHT);
02123       this->SetDataTip(STR_BLACK_CROSS, STR_TOOLTIP_CLOSE_WINDOW);
02124       break;
02125 
02126     case WWT_DROPDOWN:
02127       this->SetFill(0, 0);
02128       this->min_y = WD_DROPDOWN_HEIGHT;
02129       break;
02130 
02131     default:
02132       NOT_REACHED();
02133   }
02134 }
02135 
02136 void NWidgetLeaf::SetupSmallestSize(Window *w, bool init_array)
02137 {
02138   if (this->index >= 0 && init_array) { // Fill w->nested_array[]
02139     assert(w->nested_array_size > (uint)this->index);
02140     w->nested_array[this->index] = this;
02141   }
02142 
02143   Dimension size = {this->min_x, this->min_y};
02144   Dimension fill = {this->fill_x, this->fill_y};
02145   Dimension resize = {this->resize_x, this->resize_y};
02146   /* Get padding, and update size with the real content size if appropriate. */
02147   const Dimension *padding = NULL;
02148   switch (this->type) {
02149     case WWT_EMPTY: {
02150       static const Dimension extra = {0, 0};
02151       padding = &extra;
02152       break;
02153     }
02154     case WWT_MATRIX: {
02155       static const Dimension extra = {WD_MATRIX_LEFT + WD_MATRIX_RIGHT, WD_MATRIX_TOP + WD_MATRIX_BOTTOM};
02156       padding = &extra;
02157       break;
02158     }
02159     case WWT_SHADEBOX: {
02160       static const Dimension extra = {WD_SHADEBOX_LEFT + WD_SHADEBOX_RIGHT, WD_SHADEBOX_TOP + WD_SHADEBOX_BOTTOM};
02161       padding = &extra;
02162       if (NWidgetLeaf::shadebox_dimension.width == 0) {
02163         NWidgetLeaf::shadebox_dimension = maxdim(GetSpriteSize(SPR_WINDOW_SHADE), GetSpriteSize(SPR_WINDOW_UNSHADE));
02164         NWidgetLeaf::shadebox_dimension.width += extra.width;
02165         NWidgetLeaf::shadebox_dimension.height += extra.height;
02166       }
02167       size = maxdim(size, NWidgetLeaf::shadebox_dimension);
02168       break;
02169     }
02170     case WWT_DEBUGBOX:
02171       if (_settings_client.gui.newgrf_developer_tools && w->IsNewGRFInspectable()) {
02172         static const Dimension extra = {WD_DEBUGBOX_LEFT + WD_DEBUGBOX_RIGHT, WD_DEBUGBOX_TOP + WD_DEBUGBOX_BOTTOM};
02173         padding = &extra;
02174         if (NWidgetLeaf::debugbox_dimension.width == 0) {
02175           NWidgetLeaf::debugbox_dimension = GetSpriteSize(SPR_WINDOW_DEBUG);
02176           NWidgetLeaf::debugbox_dimension.width += extra.width;
02177           NWidgetLeaf::debugbox_dimension.height += extra.height;
02178         }
02179         size = maxdim(size, NWidgetLeaf::debugbox_dimension);
02180       } else {
02181         /* If the setting is disabled we don't want to see it! */
02182         size.width = 0;
02183         fill.width = 0;
02184         resize.width = 0;
02185       }
02186       break;
02187 
02188     case WWT_STICKYBOX: {
02189       static const Dimension extra = {WD_STICKYBOX_LEFT + WD_STICKYBOX_RIGHT, WD_STICKYBOX_TOP + WD_STICKYBOX_BOTTOM};
02190       padding = &extra;
02191       if (NWidgetLeaf::stickybox_dimension.width == 0) {
02192         NWidgetLeaf::stickybox_dimension = maxdim(GetSpriteSize(SPR_PIN_UP), GetSpriteSize(SPR_PIN_DOWN));
02193         NWidgetLeaf::stickybox_dimension.width += extra.width;
02194         NWidgetLeaf::stickybox_dimension.height += extra.height;
02195       }
02196       size = maxdim(size, NWidgetLeaf::stickybox_dimension);
02197       break;
02198     }
02199     case WWT_RESIZEBOX: {
02200       static const Dimension extra = {WD_RESIZEBOX_LEFT + WD_RESIZEBOX_RIGHT, WD_RESIZEBOX_TOP + WD_RESIZEBOX_BOTTOM};
02201       padding = &extra;
02202       if (NWidgetLeaf::resizebox_dimension.width == 0) {
02203         NWidgetLeaf::resizebox_dimension = maxdim(GetSpriteSize(SPR_WINDOW_RESIZE_LEFT), GetSpriteSize(SPR_WINDOW_RESIZE_RIGHT));
02204         NWidgetLeaf::resizebox_dimension.width += extra.width;
02205         NWidgetLeaf::resizebox_dimension.height += extra.height;
02206       }
02207       size = maxdim(size, NWidgetLeaf::resizebox_dimension);
02208       break;
02209     }
02210     case WWT_EDITBOX:
02211       size.height = max(size.height, GetStringBoundingBox("_").height + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM);
02212       /* FALL THROUGH */
02213     case WWT_PUSHBTN: {
02214       static const Dimension extra = {WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT, WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM};
02215       padding = &extra;
02216       break;
02217     }
02218     case WWT_IMGBTN:
02219     case WWT_IMGBTN_2:
02220     case WWT_PUSHIMGBTN: {
02221       static const Dimension extra = {WD_IMGBTN_LEFT + WD_IMGBTN_RIGHT,  WD_IMGBTN_TOP + WD_IMGBTN_BOTTOM};
02222       padding = &extra;
02223       Dimension d2 = GetSpriteSize(this->widget_data);
02224       if (this->type == WWT_IMGBTN_2) d2 = maxdim(d2, GetSpriteSize(this->widget_data + 1));
02225       d2.width += extra.width;
02226       d2.height += extra.height;
02227       size = maxdim(size, d2);
02228       break;
02229     }
02230     case WWT_ARROWBTN:
02231     case WWT_PUSHARROWBTN: {
02232       static const Dimension extra = {WD_IMGBTN_LEFT + WD_IMGBTN_RIGHT,  WD_IMGBTN_TOP + WD_IMGBTN_BOTTOM};
02233       padding = &extra;
02234       Dimension d2 = maxdim(GetSpriteSize(SPR_ARROW_LEFT), GetSpriteSize(SPR_ARROW_RIGHT));
02235       d2.width += extra.width;
02236       d2.height += extra.height;
02237       size = maxdim(size, d2);
02238       break;
02239     }
02240 
02241     case WWT_CLOSEBOX: {
02242       static const Dimension extra = {WD_CLOSEBOX_LEFT + WD_CLOSEBOX_RIGHT, WD_CLOSEBOX_TOP + WD_CLOSEBOX_BOTTOM};
02243       padding = &extra;
02244       if (NWidgetLeaf::closebox_dimension.width == 0) {
02245         NWidgetLeaf::closebox_dimension = maxdim(GetStringBoundingBox(STR_BLACK_CROSS), GetStringBoundingBox(STR_SILVER_CROSS));
02246         NWidgetLeaf::closebox_dimension.width += extra.width;
02247         NWidgetLeaf::closebox_dimension.height += extra.height;
02248       }
02249       size = maxdim(size, NWidgetLeaf::closebox_dimension);
02250       break;
02251     }
02252     case WWT_TEXTBTN:
02253     case WWT_PUSHTXTBTN:
02254     case WWT_TEXTBTN_2: {
02255       static const Dimension extra = {WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT,  WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM};
02256       padding = &extra;
02257       if (this->index >= 0) w->SetStringParameters(this->index);
02258       Dimension d2 = GetStringBoundingBox(this->widget_data);
02259       d2.width += extra.width;
02260       d2.height += extra.height;
02261       size = maxdim(size, d2);
02262       break;
02263     }
02264     case WWT_LABEL:
02265     case WWT_TEXT: {
02266       static const Dimension extra = {0, 0};
02267       padding = &extra;
02268       if (this->index >= 0) w->SetStringParameters(this->index);
02269       size = maxdim(size, GetStringBoundingBox(this->widget_data));
02270       break;
02271     }
02272     case WWT_CAPTION: {
02273       static const Dimension extra = {WD_CAPTIONTEXT_LEFT + WD_CAPTIONTEXT_RIGHT, WD_CAPTIONTEXT_TOP + WD_CAPTIONTEXT_BOTTOM};
02274       padding = &extra;
02275       if (this->index >= 0) w->SetStringParameters(this->index);
02276       Dimension d2 = GetStringBoundingBox(this->widget_data);
02277       d2.width += extra.width;
02278       d2.height += extra.height;
02279       size = maxdim(size, d2);
02280       break;
02281     }
02282     case WWT_DROPDOWN:
02283     case NWID_BUTTON_DROPDOWN:
02284     case NWID_PUSHBUTTON_DROPDOWN: {
02285       static const Dimension extra = {WD_DROPDOWNTEXT_LEFT + WD_DROPDOWNTEXT_RIGHT, WD_DROPDOWNTEXT_TOP + WD_DROPDOWNTEXT_BOTTOM};
02286       padding = &extra;
02287       if (this->index >= 0) w->SetStringParameters(this->index);
02288       Dimension d2 = GetStringBoundingBox(this->widget_data);
02289       d2.width += extra.width;
02290       d2.height += extra.height;
02291       size = maxdim(size, d2);
02292       break;
02293     }
02294     default:
02295       NOT_REACHED();
02296   }
02297 
02298   if (this->index >= 0) w->UpdateWidgetSize(this->index, &size, *padding, &fill, &resize);
02299 
02300   this->smallest_x = size.width;
02301   this->smallest_y = size.height;
02302   this->fill_x = fill.width;
02303   this->fill_y = fill.height;
02304   this->resize_x = resize.width;
02305   this->resize_y = resize.height;
02306 }
02307 
02308 void NWidgetLeaf::Draw(const Window *w)
02309 {
02310   if (this->current_x == 0 || this->current_y == 0) return;
02311 
02312   Rect r;
02313   r.left = this->pos_x;
02314   r.right = this->pos_x + this->current_x - 1;
02315   r.top = this->pos_y;
02316   r.bottom = this->pos_y + this->current_y - 1;
02317 
02318   const DrawPixelInfo *dpi = _cur_dpi;
02319   if (dpi->left > r.right || dpi->left + dpi->width <= r.left || dpi->top > r.bottom || dpi->top + dpi->height <= r.top) return;
02320 
02321   bool clicked = this->IsLowered();
02322   switch (this->type) {
02323     case WWT_EMPTY:
02324       break;
02325 
02326     case WWT_PUSHBTN:
02327       assert(this->widget_data == 0);
02328       DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, (clicked) ? FR_LOWERED : FR_NONE);
02329       break;
02330 
02331     case WWT_IMGBTN:
02332     case WWT_PUSHIMGBTN:
02333     case WWT_IMGBTN_2:
02334       DrawImageButtons(r, this->type, this->colour, clicked, this->widget_data);
02335       break;
02336 
02337     case WWT_TEXTBTN:
02338     case WWT_PUSHTXTBTN:
02339     case WWT_TEXTBTN_2:
02340       if (this->index >= 0) w->SetStringParameters(this->index);
02341       DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, (clicked) ? FR_LOWERED : FR_NONE);
02342       DrawLabel(r, this->type, clicked, this->widget_data);
02343       break;
02344 
02345     case WWT_ARROWBTN:
02346     case WWT_PUSHARROWBTN: {
02347       SpriteID sprite;
02348       switch (this->widget_data) {
02349         case AWV_DECREASE: sprite = _current_text_dir != TD_RTL ? SPR_ARROW_LEFT : SPR_ARROW_RIGHT; break;
02350         case AWV_INCREASE: sprite = _current_text_dir == TD_RTL ? SPR_ARROW_LEFT : SPR_ARROW_RIGHT; break;
02351         case AWV_LEFT:     sprite = SPR_ARROW_LEFT;  break;
02352         case AWV_RIGHT:    sprite = SPR_ARROW_RIGHT; break;
02353         default: NOT_REACHED();
02354       }
02355       DrawImageButtons(r, WWT_PUSHIMGBTN, this->colour, clicked, sprite);
02356     }
02357 
02358     case WWT_LABEL:
02359       if (this->index >= 0) w->SetStringParameters(this->index);
02360       DrawLabel(r, this->type, clicked, this->widget_data);
02361       break;
02362 
02363     case WWT_TEXT:
02364       if (this->index >= 0) w->SetStringParameters(this->index);
02365       DrawText(r, (TextColour)this->colour, this->widget_data);
02366       break;
02367 
02368     case WWT_MATRIX:
02369       DrawMatrix(r, this->colour, clicked, this->widget_data);
02370       break;
02371 
02372     case WWT_EDITBOX: {
02373       const QueryString *query = w->GetQueryString(this->index);
02374       if (query != NULL) query->DrawEditBox(w, this->index);
02375       break;
02376     }
02377 
02378     case WWT_CAPTION:
02379       if (this->index >= 0) w->SetStringParameters(this->index);
02380       DrawCaption(r, this->colour, w->owner, this->widget_data);
02381       break;
02382 
02383     case WWT_SHADEBOX:
02384       assert(this->widget_data == 0);
02385       DrawShadeBox(r, this->colour, w->IsShaded());
02386       break;
02387 
02388     case WWT_DEBUGBOX:
02389       DrawDebugBox(r, this->colour, clicked);
02390       break;
02391 
02392     case WWT_STICKYBOX:
02393       assert(this->widget_data == 0);
02394       DrawStickyBox(r, this->colour, !!(w->flags & WF_STICKY));
02395       break;
02396 
02397     case WWT_RESIZEBOX:
02398       assert(this->widget_data == 0);
02399       DrawResizeBox(r, this->colour, this->pos_x < (uint)(w->width / 2), !!(w->flags & WF_SIZING));
02400       break;
02401 
02402     case WWT_CLOSEBOX:
02403       DrawCloseBox(r, this->colour, this->widget_data);
02404       break;
02405 
02406     case WWT_DROPDOWN:
02407       if (this->index >= 0) w->SetStringParameters(this->index);
02408       DrawDropdown(r, this->colour, clicked, this->widget_data);
02409       break;
02410 
02411     case NWID_BUTTON_DROPDOWN:
02412     case NWID_PUSHBUTTON_DROPDOWN:
02413       if (this->index >= 0) w->SetStringParameters(this->index);
02414       DrawButtonDropdown(r, this->colour, clicked, (this->disp_flags & ND_DROPDOWN_ACTIVE) != 0, this->widget_data);
02415       break;
02416 
02417     default:
02418       NOT_REACHED();
02419   }
02420   if (this->index >= 0) w->DrawWidget(r, this->index);
02421 
02422   if (this->IsDisabled()) {
02423     GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[this->colour & 0xF][2], FILLRECT_CHECKER);
02424   }
02425 }
02426 
02434 bool NWidgetLeaf::ButtonHit(const Point &pt)
02435 {
02436   if (_current_text_dir == TD_LTR) {
02437     int button_width = this->pos_x + this->current_x - 12;
02438     return pt.x < button_width;
02439   } else {
02440     int button_left = this->pos_x + 12;
02441     return pt.x >= button_left;
02442   }
02443 }
02444 
02445 /* == Conversion code from NWidgetPart array to NWidgetBase* tree == */
02446 
02462 static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest, bool *fill_dest, int *biggest_index)
02463 {
02464   int num_used = 0;
02465 
02466   *dest = NULL;
02467   *fill_dest = false;
02468 
02469   while (count > num_used) {
02470     switch (parts->type) {
02471       case NWID_SPACER:
02472         if (*dest != NULL) return num_used;
02473         *dest = new NWidgetSpacer(0, 0);
02474         break;
02475 
02476       case NWID_HORIZONTAL:
02477         if (*dest != NULL) return num_used;
02478         *dest = new NWidgetHorizontal(parts->u.cont_flags);
02479         *fill_dest = true;
02480         break;
02481 
02482       case NWID_HORIZONTAL_LTR:
02483         if (*dest != NULL) return num_used;
02484         *dest = new NWidgetHorizontalLTR(parts->u.cont_flags);
02485         *fill_dest = true;
02486         break;
02487 
02488       case WWT_PANEL:
02489       case WWT_INSET:
02490       case WWT_FRAME:
02491         if (*dest != NULL) return num_used;
02492         *dest = new NWidgetBackground(parts->type, parts->u.widget.colour, parts->u.widget.index);
02493         *biggest_index = max(*biggest_index, (int)parts->u.widget.index);
02494         *fill_dest = true;
02495         break;
02496 
02497       case NWID_VERTICAL:
02498         if (*dest != NULL) return num_used;
02499         *dest = new NWidgetVertical(parts->u.cont_flags);
02500         *fill_dest = true;
02501         break;
02502 
02503       case NWID_MATRIX: {
02504         if (*dest != NULL) return num_used;
02505         NWidgetMatrix *nwm = new NWidgetMatrix();
02506         *dest = nwm;
02507         *fill_dest = true;
02508         nwm->SetIndex(parts->u.widget.index);
02509         nwm->SetColour(parts->u.widget.colour);
02510         *biggest_index = max(*biggest_index, (int)parts->u.widget.index);
02511         break;
02512       }
02513 
02514       case WPT_FUNCTION: {
02515         if (*dest != NULL) return num_used;
02516         /* Ensure proper functioning even when the called code simply writes its largest index. */
02517         int biggest = -1;
02518         *dest = parts->u.func_ptr(&biggest);
02519         *biggest_index = max(*biggest_index, biggest);
02520         *fill_dest = false;
02521         break;
02522       }
02523 
02524       case WPT_RESIZE: {
02525         NWidgetResizeBase *nwrb = dynamic_cast<NWidgetResizeBase *>(*dest);
02526         if (nwrb != NULL) {
02527           assert(parts->u.xy.x >= 0 && parts->u.xy.y >= 0);
02528           nwrb->SetResize(parts->u.xy.x, parts->u.xy.y);
02529         }
02530         break;
02531       }
02532 
02533       case WPT_MINSIZE: {
02534         NWidgetResizeBase *nwrb = dynamic_cast<NWidgetResizeBase *>(*dest);
02535         if (nwrb != NULL) {
02536           assert(parts->u.xy.x >= 0 && parts->u.xy.y >= 0);
02537           nwrb->SetMinimalSize(parts->u.xy.x, parts->u.xy.y);
02538         }
02539         break;
02540       }
02541 
02542       case WPT_MINTEXTLINES: {
02543         NWidgetResizeBase *nwrb = dynamic_cast<NWidgetResizeBase *>(*dest);
02544         if (nwrb != NULL) {
02545           assert(parts->u.text_lines.size >= FS_BEGIN && parts->u.text_lines.size < FS_END);
02546           nwrb->SetMinimalTextLines(parts->u.text_lines.lines, parts->u.text_lines.spacing, parts->u.text_lines.size);
02547         }
02548         break;
02549       }
02550 
02551       case WPT_FILL: {
02552         NWidgetResizeBase *nwrb = dynamic_cast<NWidgetResizeBase *>(*dest);
02553         if (nwrb != NULL) nwrb->SetFill(parts->u.xy.x, parts->u.xy.y);
02554         break;
02555       }
02556 
02557       case WPT_DATATIP: {
02558         NWidgetCore *nwc = dynamic_cast<NWidgetCore *>(*dest);
02559         if (nwc != NULL) {
02560           nwc->widget_data = parts->u.data_tip.data;
02561           nwc->tool_tip = parts->u.data_tip.tooltip;
02562         }
02563         break;
02564       }
02565 
02566       case WPT_PADDING:
02567         if (*dest != NULL) (*dest)->SetPadding(parts->u.padding.top, parts->u.padding.right, parts->u.padding.bottom, parts->u.padding.left);
02568         break;
02569 
02570       case WPT_PIPSPACE: {
02571         NWidgetPIPContainer *nwc = dynamic_cast<NWidgetPIPContainer *>(*dest);
02572         if (nwc != NULL) nwc->SetPIP(parts->u.pip.pre,  parts->u.pip.inter, parts->u.pip.post);
02573 
02574         NWidgetBackground *nwb = dynamic_cast<NWidgetBackground *>(*dest);
02575         if (nwb != NULL) nwb->SetPIP(parts->u.pip.pre,  parts->u.pip.inter, parts->u.pip.post);
02576         break;
02577       }
02578 
02579       case WPT_SCROLLBAR: {
02580         NWidgetCore *nwc = dynamic_cast<NWidgetCore *>(*dest);
02581         if (nwc != NULL) {
02582           nwc->scrollbar_index = parts->u.widget.index;
02583         }
02584         break;
02585       }
02586 
02587       case WPT_ENDCONTAINER:
02588         return num_used;
02589 
02590       case NWID_VIEWPORT:
02591         if (*dest != NULL) return num_used;
02592         *dest = new NWidgetViewport(parts->u.widget.index);
02593         *biggest_index = max(*biggest_index, (int)parts->u.widget.index);
02594         break;
02595 
02596       case NWID_HSCROLLBAR:
02597       case NWID_VSCROLLBAR:
02598         if (*dest != NULL) return num_used;
02599         *dest = new NWidgetScrollbar(parts->type, parts->u.widget.colour, parts->u.widget.index);
02600         *biggest_index = max(*biggest_index, (int)parts->u.widget.index);
02601         break;
02602 
02603       case NWID_SELECTION: {
02604         if (*dest != NULL) return num_used;
02605         NWidgetStacked *nws = new NWidgetStacked();
02606         *dest = nws;
02607         *fill_dest = true;
02608         nws->SetIndex(parts->u.widget.index);
02609         *biggest_index = max(*biggest_index, (int)parts->u.widget.index);
02610         break;
02611       }
02612 
02613       default:
02614         if (*dest != NULL) return num_used;
02615         assert((parts->type & WWT_MASK) < WWT_LAST || (parts->type & WWT_MASK) == NWID_BUTTON_DROPDOWN);
02616         *dest = new NWidgetLeaf(parts->type, parts->u.widget.colour, parts->u.widget.index, 0x0, STR_NULL);
02617         *biggest_index = max(*biggest_index, (int)parts->u.widget.index);
02618         break;
02619     }
02620     num_used++;
02621     parts++;
02622   }
02623 
02624   return num_used;
02625 }
02626 
02636 static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase **parent, int *biggest_index)
02637 {
02638   /* If *parent == NULL, only the first widget is read and returned. Otherwise, *parent must point to either
02639    * a #NWidgetContainer or a #NWidgetBackground object, and parts are added as much as possible. */
02640   NWidgetContainer *nwid_cont = dynamic_cast<NWidgetContainer *>(*parent);
02641   NWidgetBackground *nwid_parent = dynamic_cast<NWidgetBackground *>(*parent);
02642   assert(*parent == NULL || (nwid_cont != NULL && nwid_parent == NULL) || (nwid_cont == NULL && nwid_parent != NULL));
02643 
02644   int total_used = 0;
02645   for (;;) {
02646     NWidgetBase *sub_widget = NULL;
02647     bool fill_sub = false;
02648     int num_used = MakeNWidget(parts, count - total_used, &sub_widget, &fill_sub, biggest_index);
02649     parts += num_used;
02650     total_used += num_used;
02651 
02652     /* Break out of loop when end reached */
02653     if (sub_widget == NULL) break;
02654 
02655     /* If sub-widget is a container, recursively fill that container. */
02656     WidgetType tp = sub_widget->type;
02657     if (fill_sub && (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL || tp == NWID_MATRIX
02658               || tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET || tp == NWID_SELECTION)) {
02659       NWidgetBase *sub_ptr = sub_widget;
02660       int num_used = MakeWidgetTree(parts, count - total_used, &sub_ptr, biggest_index);
02661       parts += num_used;
02662       total_used += num_used;
02663     }
02664 
02665     /* Add sub_widget to parent container if available, otherwise return the widget to the caller. */
02666     if (nwid_cont != NULL) nwid_cont->Add(sub_widget);
02667     if (nwid_parent != NULL) nwid_parent->Add(sub_widget);
02668     if (nwid_cont == NULL && nwid_parent == NULL) {
02669       *parent = sub_widget;
02670       return total_used;
02671     }
02672   }
02673 
02674   if (count == total_used) return total_used; // Reached the end of the array of parts?
02675 
02676   assert(total_used < count);
02677   assert(parts->type == WPT_ENDCONTAINER);
02678   return total_used + 1; // *parts is also 'used'
02679 }
02680 
02692 NWidgetContainer *MakeNWidgets(const NWidgetPart *parts, int count, int *biggest_index, NWidgetContainer *container)
02693 {
02694   *biggest_index = -1;
02695   if (container == NULL) container = new NWidgetVertical();
02696   NWidgetBase *cont_ptr = container;
02697   MakeWidgetTree(parts, count, &cont_ptr, biggest_index);
02698   return container;
02699 }
02700 
02714 NWidgetContainer *MakeWindowNWidgetTree(const NWidgetPart *parts, int count, int *biggest_index, NWidgetStacked **shade_select)
02715 {
02716   *biggest_index = -1;
02717 
02718   /* Read the first widget recursively from the array. */
02719   NWidgetBase *nwid = NULL;
02720   int num_used = MakeWidgetTree(parts, count, &nwid, biggest_index);
02721   assert(nwid != NULL);
02722   parts += num_used;
02723   count -= num_used;
02724 
02725   NWidgetContainer *root = new NWidgetVertical;
02726   root->Add(nwid);
02727   if (count == 0) { // There is no body at all.
02728     *shade_select = NULL;
02729     return root;
02730   }
02731 
02732   /* If the first widget looks like a titlebar, treat it as such.
02733    * If it has a shading box, silently add a shade selection widget in the tree. */
02734   NWidgetHorizontal *hor_cont = dynamic_cast<NWidgetHorizontal *>(nwid);
02735   NWidgetContainer *body;
02736   if (hor_cont != NULL && hor_cont->GetWidgetOfType(WWT_CAPTION) != NULL && hor_cont->GetWidgetOfType(WWT_SHADEBOX) != NULL) {
02737     *shade_select = new NWidgetStacked;
02738     root->Add(*shade_select);
02739     body = new NWidgetVertical;
02740     (*shade_select)->Add(body);
02741   } else {
02742     *shade_select = NULL;
02743     body = root;
02744   }
02745 
02746   /* Load the remaining parts into 'body'. */
02747   int biggest2 = -1;
02748   MakeNWidgets(parts, count, &biggest2, body);
02749 
02750   *biggest_index = max(*biggest_index, biggest2);
02751   return root;
02752 }
02753 
02764 NWidgetBase *MakeCompanyButtonRows(int *biggest_index, int widget_first, int widget_last, int max_length, StringID button_tooltip)
02765 {
02766   NWidgetVertical *vert = NULL; // Storage for all rows.
02767   NWidgetHorizontal *hor = NULL; // Storage for buttons in one row.
02768   int hor_length = 0;
02769 
02770   Dimension sprite_size = GetSpriteSize(SPR_COMPANY_ICON);
02771   sprite_size.width  += WD_MATRIX_LEFT + WD_MATRIX_RIGHT;
02772   sprite_size.height += WD_MATRIX_TOP + WD_MATRIX_BOTTOM + 1; // 1 for the 'offset' of being pressed
02773 
02774   for (int widnum = widget_first; widnum <= widget_last; widnum++) {
02775     /* Ensure there is room in 'hor' for another button. */
02776     if (hor_length == max_length) {
02777       if (vert == NULL) vert = new NWidgetVertical();
02778       vert->Add(hor);
02779       hor = NULL;
02780       hor_length = 0;
02781     }
02782     if (hor == NULL) {
02783       hor = new NWidgetHorizontal();
02784       hor_length = 0;
02785     }
02786 
02787     NWidgetBackground *panel = new NWidgetBackground(WWT_PANEL, COLOUR_GREY, widnum);
02788     panel->SetMinimalSize(sprite_size.width, sprite_size.height);
02789     panel->SetFill(1, 0);
02790     panel->SetResize(1, 0);
02791     panel->SetDataTip(0x0, button_tooltip);
02792     hor->Add(panel);
02793     hor_length++;
02794   }
02795   *biggest_index = widget_last;
02796   if (vert == NULL) return hor; // All buttons fit in a single row.
02797 
02798   if (hor_length > 0 && hor_length < max_length) {
02799     /* Last row is partial, add a spacer at the end to force all buttons to the left. */
02800     NWidgetSpacer *spc = new NWidgetSpacer(sprite_size.width, sprite_size.height);
02801     spc->SetFill(1, 0);
02802     spc->SetResize(1, 0);
02803     hor->Add(spc);
02804   }
02805   if (hor != NULL) vert->Add(hor);
02806   return vert;
02807 }