widget.cpp

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00001 /* $Id: widget.cpp 11988 2008-01-26 20:55:04Z peter1138 $ */
00002 
00005 #include "stdafx.h"
00006 #include "openttd.h"
00007 #include "core/math_func.hpp"
00008 #include "player_func.h"
00009 #include "gfx_func.h"
00010 #include "window_gui.h"
00011 #include "window_func.h"
00012 #include "widgets/dropdown_func.h"
00013 
00014 #include "table/sprites.h"
00015 #include "table/strings.h"
00016 
00017 static const char *UPARROW   = "\xEE\x8A\xA0";
00018 static const char *DOWNARROW = "\xEE\x8A\xAA";
00019 
00020 static Point HandleScrollbarHittest(const Scrollbar *sb, int top, int bottom)
00021 {
00022   Point pt;
00023   int height, count, pos, cap;
00024 
00025   top += 10;
00026   bottom -= 9;
00027 
00028   height = (bottom - top);
00029 
00030   pos = sb->pos;
00031   count = sb->count;
00032   cap = sb->cap;
00033 
00034   if (count != 0) top += height * pos / count;
00035 
00036   if (cap > count) cap = count;
00037   if (count != 0) bottom -= (count - pos - cap) * height / count;
00038 
00039   pt.x = top;
00040   pt.y = bottom - 1;
00041   return pt;
00042 }
00043 
00051 void ScrollbarClickHandler(Window *w, const Widget *wi, int x, int y)
00052 {
00053   int mi, ma, pos;
00054   Scrollbar *sb;
00055 
00056   switch (wi->type) {
00057     case WWT_SCROLLBAR: {
00058       /* vertical scroller */
00059       w->flags4 &= ~WF_HSCROLL;
00060       w->flags4 &= ~WF_SCROLL2;
00061       mi = wi->top;
00062       ma = wi->bottom;
00063       pos = y;
00064       sb = &w->vscroll;
00065       break;
00066     }
00067     case WWT_SCROLL2BAR: {
00068       /* 2nd vertical scroller */
00069       w->flags4 &= ~WF_HSCROLL;
00070       w->flags4 |= WF_SCROLL2;
00071       mi = wi->top;
00072       ma = wi->bottom;
00073       pos = y;
00074       sb = &w->vscroll2;
00075       break;
00076     }
00077     case  WWT_HSCROLLBAR: {
00078       /* horizontal scroller */
00079       w->flags4 &= ~WF_SCROLL2;
00080       w->flags4 |= WF_HSCROLL;
00081       mi = wi->left;
00082       ma = wi->right;
00083       pos = x;
00084       sb = &w->hscroll;
00085       break;
00086     }
00087     default: return; //this should never happen
00088   }
00089   if (pos <= mi+9) {
00090     /* Pressing the upper button? */
00091     w->flags4 |= WF_SCROLL_UP;
00092     if (_scroller_click_timeout == 0) {
00093       _scroller_click_timeout = 6;
00094       if (sb->pos != 0) sb->pos--;
00095     }
00096     _left_button_clicked = false;
00097   } else if (pos >= ma-10) {
00098     /* Pressing the lower button? */
00099     w->flags4 |= WF_SCROLL_DOWN;
00100 
00101     if (_scroller_click_timeout == 0) {
00102       _scroller_click_timeout = 6;
00103       if ((byte)(sb->pos + sb->cap) < sb->count)
00104         sb->pos++;
00105     }
00106     _left_button_clicked = false;
00107   } else {
00108     Point pt = HandleScrollbarHittest(sb, mi, ma);
00109 
00110     if (pos < pt.x) {
00111       sb->pos = max(sb->pos - sb->cap, 0);
00112     } else if (pos > pt.y) {
00113       sb->pos = min(
00114         sb->pos + sb->cap,
00115         max(sb->count - sb->cap, 0)
00116       );
00117     } else {
00118       _scrollbar_start_pos = pt.x - mi - 9;
00119       _scrollbar_size = ma - mi - 23;
00120       w->flags4 |= WF_SCROLL_MIDDLE;
00121       _scrolling_scrollbar = true;
00122       _cursorpos_drag_start = _cursor.pos;
00123     }
00124   }
00125 
00126   SetWindowDirty(w);
00127 }
00128 
00136 int GetWidgetFromPos(const Window *w, int x, int y)
00137 {
00138   uint index;
00139   int found_index = -1;
00140 
00141   /* Go through the widgets and check if we find the widget that the coordinate is
00142    * inside. */
00143   for (index = 0; index < w->widget_count; index++) {
00144     const Widget *wi = &w->widget[index];
00145     if (wi->type == WWT_EMPTY || wi->type == WWT_FRAME) continue;
00146 
00147     if (x >= wi->left && x <= wi->right && y >= wi->top &&  y <= wi->bottom &&
00148         !w->IsWidgetHidden(index)) {
00149       found_index = index;
00150     }
00151   }
00152 
00153   return found_index;
00154 }
00155 
00156 
00157 void DrawFrameRect(int left, int top, int right, int bottom, int ctab, FrameFlags flags)
00158 {
00159   uint dark         = _colour_gradient[ctab][3];
00160   uint medium_dark  = _colour_gradient[ctab][5];
00161   uint medium_light = _colour_gradient[ctab][6];
00162   uint light        = _colour_gradient[ctab][7];
00163 
00164   if (flags & FR_TRANSPARENT) {
00165     GfxFillRect(left, top, right, bottom, PALETTE_TO_TRANSPARENT | (1 << USE_COLORTABLE));
00166   } else {
00167     uint interior;
00168 
00169     if (flags & FR_LOWERED) {
00170       GfxFillRect(left,     top,     left,  bottom,     dark);
00171       GfxFillRect(left + 1, top,     right, top,        dark);
00172       GfxFillRect(right,    top + 1, right, bottom - 1, light);
00173       GfxFillRect(left + 1, bottom,  right, bottom,     light);
00174       interior = (flags & FR_DARKENED ? medium_dark : medium_light);
00175     } else {
00176       GfxFillRect(left,     top,    left,      bottom - 1, light);
00177       GfxFillRect(left + 1, top,    right - 1, top,        light);
00178       GfxFillRect(right,    top,    right,     bottom - 1, dark);
00179       GfxFillRect(left,     bottom, right,     bottom,     dark);
00180       interior = medium_dark;
00181     }
00182     if (!(flags & FR_BORDERONLY)) {
00183       GfxFillRect(left + 1, top + 1, right - 1, bottom - 1, interior);
00184     }
00185   }
00186 }
00187 
00188 
00189 void DrawWindowWidgets(const Window *w)
00190 {
00191   const DrawPixelInfo* dpi = _cur_dpi;
00192 
00193   for (uint i = 0; i < w->widget_count; i++) {
00194     const Widget *wi = &w->widget[i];
00195     bool clicked = w->IsWidgetLowered(i);
00196     Rect r;
00197 
00198     if (dpi->left > (r.right = wi->right) ||
00199         dpi->left + dpi->width <= (r.left = wi->left) ||
00200         dpi->top > (r.bottom = wi->bottom) ||
00201         dpi->top + dpi->height <= (r.top = wi->top) ||
00202         w->IsWidgetHidden(i)) {
00203       continue;
00204     }
00205 
00206     switch (wi->type & WWT_MASK) {
00207     case WWT_IMGBTN:
00208     case WWT_IMGBTN_2: {
00209       SpriteID img = wi->data;
00210       assert(img != 0);
00211       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00212 
00213       /* show different image when clicked for WWT_IMGBTN_2 */
00214       if ((wi->type & WWT_MASK) == WWT_IMGBTN_2 && clicked) img++;
00215       DrawSprite(img, PAL_NONE, r.left + 1 + clicked, r.top + 1 + clicked);
00216       break;
00217     }
00218 
00219     case WWT_PANEL: {
00220       assert(wi->data == 0);
00221       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00222       break;
00223     }
00224 
00225     case WWT_TEXTBTN:
00226     case WWT_TEXTBTN_2: {
00227       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00228       }
00229     /* fall through */
00230 
00231     case WWT_LABEL: {
00232       StringID str = wi->data;
00233 
00234       if ((wi->type & WWT_MASK) == WWT_TEXTBTN_2 && clicked) str++;
00235 
00236       DrawStringCentered(((r.left + r.right + 1) >> 1) + clicked, ((r.top + r.bottom + 1) >> 1) - 5 + clicked, str, TC_FROMSTRING);
00237       break;
00238     }
00239 
00240     case WWT_TEXT: {
00241       const StringID str = wi->data;
00242 
00243       if (str != STR_NULL) DrawStringTruncated(r.left, r.top, str, wi->color, r.right - r.left);
00244       break;
00245     }
00246 
00247     case WWT_INSET: {
00248       const StringID str = wi->data;
00249       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_LOWERED | FR_DARKENED);
00250 
00251       if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 1, str, TC_FROMSTRING, r.right - r.left - 10);
00252       break;
00253     }
00254 
00255     case WWT_MATRIX: {
00256       int c, d, ctr;
00257       int x, amt1, amt2;
00258       int color;
00259 
00260       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00261 
00262       c = GB(wi->data, 0, 8);
00263       amt1 = (wi->right - wi->left + 1) / c;
00264 
00265       d = GB(wi->data, 8, 8);
00266       amt2 = (wi->bottom - wi->top + 1) / d;
00267 
00268       color = _colour_gradient[wi->color & 0xF][6];
00269 
00270       x = r.left;
00271       for (ctr = c; ctr > 1; ctr--) {
00272         x += amt1;
00273         GfxFillRect(x, r.top + 1, x, r.bottom - 1, color);
00274       }
00275 
00276       x = r.top;
00277       for (ctr = d; ctr > 1; ctr--) {
00278         x += amt2;
00279         GfxFillRect(r.left + 1, x, r.right - 1, x, color);
00280       }
00281 
00282       color = _colour_gradient[wi->color & 0xF][4];
00283 
00284       x = r.left - 1;
00285       for (ctr = c; ctr > 1; ctr--) {
00286         x += amt1;
00287         GfxFillRect(x, r.top + 1, x, r.bottom - 1, color);
00288       }
00289 
00290       x = r.top - 1;
00291       for (ctr = d; ctr > 1; ctr--) {
00292         x += amt2;
00293         GfxFillRect(r.left + 1, x, r.right - 1, x, color);
00294       }
00295 
00296       break;
00297     }
00298 
00299     /* vertical scrollbar */
00300     case WWT_SCROLLBAR: {
00301       Point pt;
00302       int c1, c2;
00303 
00304       assert(wi->data == 0);
00305       assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
00306 
00307       /* draw up/down buttons */
00308       clicked = ((w->flags4 & (WF_SCROLL_UP | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_UP);
00309       DrawFrameRect(r.left, r.top, r.right, r.top + 9, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00310       DoDrawString(UPARROW, r.left + 2 + clicked, r.top + clicked, TC_BLACK);
00311 
00312       clicked = (((w->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_DOWN));
00313       DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00314       DoDrawString(DOWNARROW, r.left + 2 + clicked, r.bottom - 9 + clicked, TC_BLACK);
00315 
00316       c1 = _colour_gradient[wi->color & 0xF][3];
00317       c2 = _colour_gradient[wi->color & 0xF][7];
00318 
00319       /* draw "shaded" background */
00320       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c2);
00321       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c1 | (1 << PALETTE_MODIFIER_GREYOUT));
00322 
00323       /* draw shaded lines */
00324       GfxFillRect(r.left + 2, r.top + 10, r.left + 2, r.bottom - 10, c1);
00325       GfxFillRect(r.left + 3, r.top + 10, r.left + 3, r.bottom - 10, c2);
00326       GfxFillRect(r.left + 7, r.top + 10, r.left + 7, r.bottom - 10, c1);
00327       GfxFillRect(r.left + 8, r.top + 10, r.left + 8, r.bottom - 10, c2);
00328 
00329       pt = HandleScrollbarHittest(&w->vscroll, r.top, r.bottom);
00330       DrawFrameRect(r.left, pt.x, r.right, pt.y, wi->color, (w->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_MIDDLE ? FR_LOWERED : FR_NONE);
00331       break;
00332     }
00333     case WWT_SCROLL2BAR: {
00334       Point pt;
00335       int c1, c2;
00336 
00337       assert(wi->data == 0);
00338       assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
00339 
00340       /* draw up/down buttons */
00341       clicked = ((w->flags4 & (WF_SCROLL_UP | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_UP | WF_SCROLL2));
00342       DrawFrameRect(r.left, r.top, r.right, r.top + 9, wi->color,  (clicked) ? FR_LOWERED : FR_NONE);
00343       DoDrawString(UPARROW, r.left + 2 + clicked, r.top + clicked, TC_BLACK);
00344 
00345       clicked = ((w->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_DOWN | WF_SCROLL2));
00346       DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, wi->color,  (clicked) ? FR_LOWERED : FR_NONE);
00347       DoDrawString(DOWNARROW, r.left + 2 + clicked, r.bottom - 9 + clicked, TC_BLACK);
00348 
00349       c1 = _colour_gradient[wi->color & 0xF][3];
00350       c2 = _colour_gradient[wi->color & 0xF][7];
00351 
00352       /* draw "shaded" background */
00353       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c2);
00354       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c1 | (1 << PALETTE_MODIFIER_GREYOUT));
00355 
00356       /* draw shaded lines */
00357       GfxFillRect(r.left + 2, r.top + 10, r.left + 2, r.bottom - 10, c1);
00358       GfxFillRect(r.left + 3, r.top + 10, r.left + 3, r.bottom - 10, c2);
00359       GfxFillRect(r.left + 7, r.top + 10, r.left + 7, r.bottom - 10, c1);
00360       GfxFillRect(r.left + 8, r.top + 10, r.left + 8, r.bottom - 10, c2);
00361 
00362       pt = HandleScrollbarHittest(&w->vscroll2, r.top, r.bottom);
00363       DrawFrameRect(r.left, pt.x, r.right, pt.y, wi->color, (w->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_MIDDLE | WF_SCROLL2) ? FR_LOWERED : FR_NONE);
00364       break;
00365     }
00366 
00367     /* horizontal scrollbar */
00368     case WWT_HSCROLLBAR: {
00369       Point pt;
00370       int c1, c2;
00371 
00372       assert(wi->data == 0);
00373       assert(r.bottom - r.top == 11); // XXX - to ensure the same sizes are used everywhere!
00374 
00375       clicked = ((w->flags4 & (WF_SCROLL_UP | WF_HSCROLL)) == (WF_SCROLL_UP | WF_HSCROLL));
00376       DrawFrameRect(r.left, r.top, r.left + 9, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00377       DrawSprite(SPR_ARROW_LEFT, PAL_NONE, r.left + 1 + clicked, r.top + 1 + clicked);
00378 
00379       clicked = ((w->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL)) == (WF_SCROLL_DOWN | WF_HSCROLL));
00380       DrawFrameRect(r.right - 9, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00381       DrawSprite(SPR_ARROW_RIGHT, PAL_NONE, r.right - 8 + clicked, r.top + 1 + clicked);
00382 
00383       c1 = _colour_gradient[wi->color & 0xF][3];
00384       c2 = _colour_gradient[wi->color & 0xF][7];
00385 
00386       /* draw "shaded" background */
00387       GfxFillRect(r.left + 10, r.top, r.right - 10, r.bottom, c2);
00388       GfxFillRect(r.left + 10, r.top, r.right - 10, r.bottom, c1 | (1 << PALETTE_MODIFIER_GREYOUT));
00389 
00390       /* draw shaded lines */
00391       GfxFillRect(r.left + 10, r.top + 2, r.right - 10, r.top + 2, c1);
00392       GfxFillRect(r.left + 10, r.top + 3, r.right - 10, r.top + 3, c2);
00393       GfxFillRect(r.left + 10, r.top + 7, r.right - 10, r.top + 7, c1);
00394       GfxFillRect(r.left + 10, r.top + 8, r.right - 10, r.top + 8, c2);
00395 
00396       /* draw actual scrollbar */
00397       pt = HandleScrollbarHittest(&w->hscroll, r.left, r.right);
00398       DrawFrameRect(pt.x, r.top, pt.y, r.bottom, wi->color, (w->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL)) == (WF_SCROLL_MIDDLE | WF_HSCROLL) ? FR_LOWERED : FR_NONE);
00399 
00400       break;
00401     }
00402 
00403     case WWT_FRAME: {
00404       const StringID str = wi->data;
00405       int c1, c2;
00406       int x2 = r.left; // by default the left side is the left side of the widget
00407 
00408       if (str != STR_NULL) x2 = DrawString(r.left + 6, r.top, str, TC_FROMSTRING);
00409 
00410       c1 = _colour_gradient[wi->color][3];
00411       c2 = _colour_gradient[wi->color][7];
00412 
00413       /* Line from upper left corner to start of text */
00414       GfxFillRect(r.left, r.top + 4, r.left + 4, r.top + 4, c1);
00415       GfxFillRect(r.left + 1, r.top + 5, r.left + 4, r.top + 5, c2);
00416 
00417       /* Line from end of text to upper right corner */
00418       GfxFillRect(x2, r.top + 4, r.right - 1, r.top + 4, c1);
00419       GfxFillRect(x2, r.top + 5, r.right - 2, r.top + 5, c2);
00420 
00421       /* Line from upper left corner to bottom left corner */
00422       GfxFillRect(r.left, r.top + 5, r.left, r.bottom - 1, c1);
00423       GfxFillRect(r.left + 1, r.top + 6, r.left + 1, r.bottom - 2, c2);
00424 
00425       /*Line from upper right corner to bottom right corner */
00426       GfxFillRect(r.right - 1, r.top + 5, r.right - 1, r.bottom - 2, c1);
00427       GfxFillRect(r.right, r.top + 4, r.right, r.bottom - 1, c2);
00428 
00429       GfxFillRect(r.left + 1, r.bottom - 1, r.right - 1, r.bottom - 1, c1);
00430       GfxFillRect(r.left, r.bottom, r.right, r.bottom, c2);
00431 
00432       break;
00433     }
00434 
00435     case WWT_STICKYBOX: {
00436       assert(wi->data == 0);
00437       assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
00438 
00439       clicked = !!(w->flags4 & WF_STICKY);
00440       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00441       DrawSprite((clicked) ? SPR_PIN_UP : SPR_PIN_DOWN, PAL_NONE, r.left + 2 + clicked, r.top + 3 + clicked);
00442       break;
00443     }
00444 
00445     case WWT_RESIZEBOX: {
00446       assert(wi->data == 0);
00447       assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
00448 
00449       clicked = !!(w->flags4 & WF_SIZING);
00450       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
00451       DrawSprite(SPR_WINDOW_RESIZE, PAL_NONE, r.left + 3 + clicked, r.top + 3 + clicked);
00452       break;
00453     }
00454 
00455     case WWT_CLOSEBOX: {
00456       const StringID str = wi->data;
00457 
00458       assert(str == STR_00C5 || str == STR_00C6); // black or silver cross
00459       assert(r.right - r.left == 10); // ensure the same sizes are used everywhere
00460 
00461       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_NONE);
00462       DrawString(r.left + 2, r.top + 2, str, TC_FROMSTRING);
00463       break;
00464     }
00465 
00466     case WWT_CAPTION: {
00467       assert(r.bottom - r.top == 13); // XXX - to ensure the same sizes are used everywhere!
00468       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_BORDERONLY);
00469       DrawFrameRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, wi->color, (w->caption_color == 0xFF) ? FR_LOWERED | FR_DARKENED : FR_LOWERED | FR_DARKENED | FR_BORDERONLY);
00470 
00471       if (w->caption_color != 0xFF) {
00472         GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, _colour_gradient[_player_colors[w->caption_color]][4]);
00473       }
00474 
00475       DrawStringCenteredTruncated(r.left + 2, r.right - 2, r.top + 2, wi->data, 0x84);
00476       break;
00477     }
00478 
00479     case WWT_DROPDOWN: {
00480       assert(r.bottom - r.top == 11); // ensure consistent size
00481 
00482       StringID str = wi->data;
00483       DrawFrameRect(r.left, r.top, r.right - 12, r.bottom, wi->color, FR_NONE);
00484       DrawFrameRect(r.right - 11, r.top, r.right, r.bottom, wi->color, clicked ? FR_LOWERED : FR_NONE);
00485       DrawString(r.right - (clicked ? 8 : 9), r.top + (clicked ? 2 : 1), STR_0225, TC_BLACK);
00486       if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 1, str, TC_BLACK, r.right - r.left - 12);
00487       break;
00488     }
00489 
00490     case WWT_DROPDOWNIN: {
00491       assert(r.bottom - r.top == 11); // ensure consistent size
00492 
00493       StringID str = wi->data;
00494       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_LOWERED | FR_DARKENED);
00495       DrawFrameRect(r.right - 11, r.top + 1, r.right - 1, r.bottom - 1, wi->color, clicked ? FR_LOWERED : FR_NONE);
00496       DrawString(r.right - (clicked ? 8 : 9), r.top + (clicked ? 2 : 1), STR_0225, TC_BLACK);
00497       if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 2, str, TC_BLACK, r.right - r.left - 12);
00498       break;
00499     }
00500     }
00501 
00502     if (w->IsWidgetDisabled(i)) {
00503       GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[wi->color & 0xF][2] | (1 << PALETTE_MODIFIER_GREYOUT));
00504     }
00505   }
00506 
00507 
00508   if (w->flags4 & WF_WHITE_BORDER_MASK) {
00509     DrawFrameRect(0, 0, w->width - 1, w->height - 1, 0xF, FR_BORDERONLY);
00510   }
00511 
00512 }
00513 
00514 static void ResizeWidgets(Window *w, byte a, byte b)
00515 {
00516   int16 offset = w->widget[a].left;
00517   int16 length = w->widget[b].right - offset;
00518 
00519   w->widget[a].right  = (length / 2) + offset;
00520 
00521   w->widget[b].left  = w->widget[a].right + 1;
00522 }
00523 
00524 static void ResizeWidgets(Window *w, byte a, byte b, byte c)
00525 {
00526   int16 offset = w->widget[a].left;
00527   int16 length = w->widget[c].right - offset;
00528 
00529   w->widget[a].right = length / 3;
00530   w->widget[b].right = w->widget[a].right * 2;
00531 
00532   w->widget[a].right += offset;
00533   w->widget[b].right += offset;
00534 
00535   /* Now the right side of the buttons are set. We will now set the left sides next to them */
00536   w->widget[b].left  = w->widget[a].right + 1;
00537   w->widget[c].left  = w->widget[b].right + 1;
00538 }
00539 
00546 void ResizeButtons(Window *w, byte left, byte right)
00547 {
00548   int16 num_widgets = right - left + 1;
00549 
00550   if (num_widgets < 2) NOT_REACHED();
00551 
00552   switch (num_widgets) {
00553     case 2: ResizeWidgets(w, left, right); break;
00554     case 3: ResizeWidgets(w, left, left + 1, right); break;
00555     default: {
00556       /* Looks like we got more than 3 widgets to resize
00557        * Now we will find the middle of the space desinated for the widgets
00558        * and place half of the widgets on each side of it and call recursively.
00559        * Eventually we will get down to blocks of 2-3 widgets and we got code to handle those cases */
00560       int16 offset = w->widget[left].left;
00561       int16 length = w->widget[right].right - offset;
00562       byte widget = ((num_widgets - 1)/ 2) + left; // rightmost widget of the left side
00563 
00564       /* Now we need to find the middle of the widgets.
00565        * It will not always be the middle because if we got an uneven number of widgets,
00566        *   we will need it to be 2/5, 3/7 and so on
00567        * To get this, we multiply with num_widgets/num_widgets. Since we calculate in int, we will get:
00568        *
00569        *    num_widgets/2 (rounding down)
00570        *   ---------------
00571        *     num_widgets
00572        *
00573        * as multiplier to length. We just multiply before divide to that we stay in the int area though */
00574       int16 middle = ((length * num_widgets) / (2 * num_widgets)) + offset;
00575 
00576       /* Set left and right on the widgets, that's next to our "middle" */
00577       w->widget[widget].right = middle;
00578       w->widget[widget + 1].left = w->widget[widget].right + 1;
00579       /* Now resize the left and right of the middle */
00580       ResizeButtons(w, left, widget);
00581       ResizeButtons(w, widget + 1, right);
00582     }
00583   }
00584 }
00585 
00586 void ResizeWindowForWidget(Window *w, int widget, int delta_x, int delta_y)
00587 {
00588   int right  = w->widget[widget].right;
00589   int bottom = w->widget[widget].bottom;
00590 
00591   for (uint i = 0; i < w->widget_count; i++) {
00592     if (w->widget[i].left >= right) w->widget[i].left += delta_x;
00593     if (w->widget[i].right >= right) w->widget[i].right += delta_x;
00594     if (w->widget[i].top >= bottom) w->widget[i].top += delta_y;
00595     if (w->widget[i].bottom >= bottom) w->widget[i].bottom += delta_y;
00596   }
00597 
00598   w->width  += delta_x;
00599   w->height += delta_y;
00600   w->resize.width  += delta_x;
00601   w->resize.height += delta_y;
00602 }
00603 
00609 void DrawSortButtonState(const Window *w, int widget, SortButtonState state)
00610 {
00611   if (state == SBS_OFF) return;
00612 
00613   int offset = w->IsWidgetLowered(widget) ? 1 : 0;
00614   DoDrawString(state == SBS_DOWN ? DOWNARROW : UPARROW, w->widget[widget].right - 11 + offset, w->widget[widget].top + 1 + offset, TC_BLACK);
00615 }

Generated on Wed Oct 1 17:03:25 2008 for openttd by  doxygen 1.5.6