OpenTTD
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Nested widget to display and control a scrollbar in a window. More...
#include <widget_type.h>
Public Member Functions | |
NWidgetScrollbar (WidgetType tp, Colours colour, int index) | |
Scrollbar widget. | |
void | SetupSmallestSize (Window *w, bool init_array) |
Compute smallest size needed by the widget. | |
void | Draw (const Window *w) |
Draw the widgets of the tree. | |
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NWidgetCore (WidgetType tp, Colours colour, uint fill_x, uint fill_y, uint32 widget_data, StringID tool_tip) | |
Initialization of a 'real' widget. | |
void | SetIndex (int index) |
Set index of the nested widget in the widget array. | |
void | SetDataTip (uint32 widget_data, StringID tool_tip) |
Set data and tool tip of the nested widget. | |
void | SetLowered (bool lowered) |
Lower or raise the widget. | |
bool | IsLowered () const |
Return whether the widget is lowered. | |
void | SetDisabled (bool disabled) |
Disable (grey-out) or enable the widget. | |
bool | IsDisabled () const |
Return whether the widget is disabled. | |
void | FillNestedArray (NWidgetBase **array, uint length) |
NWidgetCore * | GetWidgetFromPos (int x, int y) |
Retrieve a widget by its position. | |
bool | IsHighlighted () const |
Return whether the widget is highlighted. | |
TextColour | GetHighlightColour () const |
Return the colour of the highlight. | |
void | SetHighlighted (TextColour highlight_colour) |
Highlight the widget or not. | |
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NWidgetResizeBase (WidgetType tp, uint fill_x, uint fill_y) | |
Constructor for resizable nested widgets. | |
void | SetMinimalSize (uint min_x, uint min_y) |
Set minimal size of the widget. | |
void | SetMinimalTextLines (uint8 min_lines, uint8 spacing, FontSize size) |
Set minimal text lines for the widget. | |
void | SetFill (uint fill_x, uint fill_y) |
Set the filling of the widget from initial size. | |
void | SetResize (uint resize_x, uint resize_y) |
Set resize step of the widget. | |
void | AssignSizePosition (SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl) |
Assign size and position to the widget. | |
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NWidgetBase (WidgetType tp) | |
Base class constructor. | |
virtual NWidgetBase * | GetWidgetOfType (WidgetType tp) |
Retrieve a widget by its type. | |
void | SetPadding (uint8 top, uint8 right, uint8 bottom, uint8 left) |
Set additional space (padding) around the widget. | |
uint | GetHorizontalStepSize (SizingType sizing) const |
Get the horizontal sizing step. | |
uint | GetVerticalStepSize (SizingType sizing) const |
Get the vertical sizing step. | |
virtual void | SetDirty (const Window *w) const |
Mark the widget as 'dirty' (in need of repaint). | |
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void * | operator new (size_t size) |
Memory allocator for a single class instance. | |
void * | operator new[] (size_t size) |
Memory allocator for an array of class instances. | |
void | operator delete (void *ptr) |
Memory release for a single class instance. | |
void | operator delete[] (void *ptr) |
Memory release for an array of class instances. | |
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Scrollbar (bool is_vertical) | |
uint16 | GetCount () const |
Gets the number of elements in the list. | |
uint16 | GetCapacity () const |
Gets the number of visible elements of the scrollbar. | |
uint16 | GetPosition () const |
Gets the position of the first visible element in the list. | |
bool | IsVisible (uint16 item) const |
Checks whether given current item is visible in the list. | |
bool | IsVertical () const |
Is the scrollbar vertical or not? | |
void | SetStepSize (uint16 stepsize) |
Set the distance to scroll when using the buttons or the wheel. | |
void | SetCount (int num) |
Sets the number of elements in the list. | |
void | SetCapacity (int capacity) |
Set the capacity of visible elements. | |
void | SetCapacityFromWidget (Window *w, int widget, int padding=0) |
Set capacity of visible elements from the size and resize properties of a widget. | |
void | SetPosition (int position) |
Sets the position of the first visible element. | |
void | UpdatePosition (int difference, ScrollbarStepping unit=SS_SMALL) |
Updates the position of the first visible element by the given amount. | |
void | ScrollTowards (int position) |
Scroll towards the given position; if the item is visible nothing happens, otherwise it will be shown either at the bottom or top of the window depending on where in the list it was. | |
int | GetScrolledRowFromWidget (int clickpos, const Window *const w, int widget, int padding=0, int line_height=-1) const |
Compute the row of a scrolled widget that a user clicked in. |
Static Public Member Functions | |
static void | InvalidateDimensionCache () |
static Dimension | GetVerticalDimension () |
static Dimension | GetHorizontalDimension () |
Static Private Attributes | |
static Dimension | vertical_dimension = {0, 0} |
Cached size of vertical scrollbar button. | |
static Dimension | horizontal_dimension = {0, 0} |
Cached size of horizontal scrollbar button. |
Additional Inherited Members | |
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enum | ScrollbarStepping { SS_RAW, SS_SMALL, SS_BIG } |
Stepping sizes when scrolling. More... | |
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NWidgetDisplay | disp_flags |
Flags that affect display and interaction with the widget. | |
Colours | colour |
Colour of this widget. | |
int | index |
Index of the nested widget in the widget array of the window (-1 means 'not used'). | |
uint32 | widget_data |
Data of the widget. | |
StringID | tool_tip |
Tooltip of the widget. | |
int | scrollbar_index |
Index of an attached scrollbar. | |
TextColour | highlight_colour |
Colour of highlight. | |
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void | StoreSizePosition (SizingType sizing, uint x, uint y, uint given_width, uint given_height) |
Store size and position. |
Nested widget to display and control a scrollbar in a window.
Also assign the scrollbar to other widgets using SetScrollbar() to make the mousewheel work.
Definition at line 750 of file widget_type.h.
NWidgetScrollbar::NWidgetScrollbar | ( | WidgetType | tp, |
Colours | colour, | ||
int | index | ||
) |
Scrollbar widget.
tp | Scrollbar type. (horizontal/vertical) |
colour | Colour of the scrollbar. |
index | Index in the widget array used by the window system. |
Definition at line 1988 of file widget.cpp.
References NWID_HSCROLLBAR, NWID_VSCROLLBAR, and NWidgetCore::SetIndex().
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virtual |
Draw the widgets of the tree.
The function calls Window::DrawWidget for each widget with a non-negative index, after the widget itself is painted.
w | Window that owns the tree. |
Implements NWidgetBase.
Definition at line 2025 of file widget.cpp.
References _colour_gradient, NWidgetCore::colour, NWidgetBase::current_x, NWidgetBase::current_y, NWidgetCore::disp_flags, DrawHorizontalScrollbar(), DrawVerticalScrollbar(), FILLRECT_CHECKER, GfxFillRect(), HasBit(), NWidgetCore::IsDisabled(), ND_SCROLLBAR_BTN, NDB_SCROLLBAR_DOWN, NDB_SCROLLBAR_UP, NWID_HSCROLLBAR, NWidgetBase::pos_x, NWidgetBase::pos_y, Window::scrolling_scrollbar, and NWidgetBase::type.
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virtual |
Compute smallest size needed by the widget.
The smallest size of a widget is the smallest size that a widget needs to display itself properly. In addition, filling and resizing of the widget are computed. The function calls Window::UpdateWidgetSize for each leaf widget and background widget without child with a non-negative index.
w | Window owning the widget. |
init_array | Initialize the w->nested_array . |
Implements NWidgetBase.
Definition at line 1994 of file widget.cpp.
References NWidgetCore::index, NWidgetResizeBase::min_x, NWidgetResizeBase::min_y, Window::nested_array, Window::nested_array_size, NWID_HSCROLLBAR, NWID_VSCROLLBAR, NWidgetCore::SetDataTip(), NWidgetResizeBase::SetFill(), NWidgetResizeBase::SetMinimalSize(), NWidgetResizeBase::SetResize(), NWidgetBase::smallest_x, NWidgetBase::smallest_y, and NWidgetBase::type.