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Public Member Functions
NWidgetViewport Class Reference

Nested widget to display a viewport in a window. More...

#include <widget_type.h>

Inheritance diagram for NWidgetViewport:
NWidgetCore NWidgetResizeBase NWidgetBase ZeroedMemoryAllocator

Public Member Functions

 NWidgetViewport (int index)
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.
void InitializeViewport (Window *w, uint32 follow_flags, ZoomLevel zoom)
 Initialize the viewport of the window.
void UpdateViewportCoordinates (Window *w)
 Update the position and size of the viewport (after eg a resize).
- Public Member Functions inherited from NWidgetCore
 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)
NWidgetCoreGetWidgetFromPos (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.
- Public Member Functions inherited from NWidgetResizeBase
 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.
- Public Member Functions inherited from NWidgetBase
 NWidgetBase (WidgetType tp)
 Base class constructor.
virtual NWidgetBaseGetWidgetOfType (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).
- Public Member Functions inherited from ZeroedMemoryAllocator
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.

Additional Inherited Members

- Data Fields inherited from NWidgetCore
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.
- Protected Member Functions inherited from NWidgetBase
void StoreSizePosition (SizingType sizing, uint x, uint y, uint given_width, uint given_height)
 Store size and position.

Detailed Description

Nested widget to display a viewport in a window.

After initializing the nested widget tree, call InitializeViewport(). After changing the window size, call UpdateViewportCoordinates() eg from Window::OnResize(). If the #display_flags field contains the ND_NO_TRANSPARENCY bit, the viewport will disable transparency. Shading to grey-scale is controlled with the ND_SHADE_GREY bit (used for B&W news papers), the ND_SHADE_DIMMED gives dimmed colours (for colour news papers).

Todo:
Class derives from NWidgetCore, but does not use colour, widget_data, or tool_tip.

Definition at line 575 of file widget_type.h.

Member Function Documentation

void NWidgetViewport::Draw ( const Window w)
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.

Parameters
wWindow that owns the tree.

Implements NWidgetBase.

Definition at line 1903 of file widget.cpp.

References _transparency_opt, NWidgetBase::current_x, NWidgetBase::current_y, NWidgetCore::disp_flags, Window::DrawViewport(), FILLRECT_RECOLOUR, GfxFillRect(), ND_NO_TRANSPARENCY, ND_SHADE_DIMMED, ND_SHADE_GREY, PALETTE_NEWSPAPER, PALETTE_TO_TRANSPARENT, NWidgetBase::pos_x, NWidgetBase::pos_y, TO_LOADING, and TO_SIGNS.

void NWidgetViewport::InitializeViewport ( Window w,
uint32  follow_flags,
ZoomLevel  zoom 
)

Initialize the viewport of the window.

Parameters
wWindow owning the viewport.
follow_flagsType of viewport, see InitializeWindowViewport().
zoomZoom level.

Definition at line 1927 of file widget.cpp.

References NWidgetBase::current_x, NWidgetBase::current_y, InitializeWindowViewport(), NWidgetBase::pos_x, and NWidgetBase::pos_y.

Referenced by WaypointWindow::WaypointWindow().

void NWidgetViewport::SetupSmallestSize ( Window w,
bool  init_array 
)
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.

Parameters
wWindow owning the widget.
init_arrayInitialize the w->nested_array.
Note
After the computation, the results can be queried by accessing the smallest_x and smallest_y data members of the widget.

Implements NWidgetBase.

Definition at line 1893 of file widget.cpp.

References NWidgetCore::index, NWidgetResizeBase::min_x, NWidgetResizeBase::min_y, Window::nested_array, Window::nested_array_size, NWidgetBase::smallest_x, and NWidgetBase::smallest_y.

void NWidgetViewport::UpdateViewportCoordinates ( Window w)

The documentation for this class was generated from the following files: