Detailed Description

The following are functions and macros related to GDI (Graphics Device Interface) access.

Related class group: Graphics Device Interface (GDI)

Defines
#define	wxDROP_ICON(name)
	This macro creates either a cursor (MSW) or an icon (elsewhere) with the given name (of type `const char*`).
#define	wxBITMAP(bitmapName)
	This macro loads a bitmap from either application resources (on the platforms for which they exist, i.e.
#define	wxICON(iconName)
	This macro loads an icon from either application resources (on the platforms for which they exist, i.e.
Functions
bool	wxIsDragResultOk (wxDragResult res)
	Returns true if res indicates that something was done during a DnD operation, i.e.
bool	wxColourDisplay ()
	Returns true if the display is colour, false otherwise.
int	wxDisplayDepth ()
	Returns the depth of the display (a value of 1 denotes a monochrome display).
void	wxSetCursor (const wxCursor &cursor)
	Globally sets the cursor; only has an effect on Windows, Mac and GTK+.
void	wxClientDisplayRect (int x, int y, int width, int height)
	Returns the dimensions of the work area on the display.
wxRect	wxGetClientDisplayRect ()
wxSize	wxGetDisplayPPI ()
	Returns the display resolution in pixels per inch.
void	wxDisplaySize (int width, int height)
	Returns the display size in pixels.
wxSize	wxGetDisplaySize ()
void	wxDisplaySizeMM (int width, int height)
	Returns the display size in millimeters.
wxSize	wxGetDisplaySizeMM ()
bool	wxMakeMetafilePlaceable (const wxString &filename, int minX, int minY, int maxX, int maxY, float scale=1.0)
	Given a filename for an existing, valid metafile (as constructed using wxMetafileDC) makes it into a placeable metafile by prepending a header containing the given bounding box.

Define Documentation

#define wxBITMAP ( bitmapName )

This macro loads a bitmap from either application resources (on the platforms for which they exist, i.e.

Windows and OS2) or from an XPM file. This can help to avoid using #ifdef when creating bitmaps.

参照:: Bitmaps and Icons, wxICON()

Include file:

#include <wx/gdicmn.h>

#define wxDROP_ICON ( name )

This macro creates either a cursor (MSW) or an icon (elsewhere) with the given name (of type const char*).

Under MSW, the cursor is loaded from the resource file and the icon is loaded from XPM file under other platforms.

This macro should be used with wxDropSource::wxDropSource().

Returns:: wxCursor on MSW, otherwise returns a wxIcon

Include file:

#include <wx/dnd.h>

#define wxICON ( iconName )

This macro loads an icon from either application resources (on the platforms for which they exist, i.e.

Windows and OS2) or from an XPM file. This can help to avoid using #ifdef when creating icons.

参照:: Bitmaps and Icons, wxBITMAP()

Include file:

#include <wx/gdicmn.h>

Function Documentation

void wxClientDisplayRect	(	int *	x,
		int *	y,
		int *	width,
		int *	height
	)

Returns the dimensions of the work area on the display.

On Windows this means the area not covered by the taskbar, etc. Other platforms are currently defaulting to the whole display until a way is found to provide this info for all window managers, etc.

Include file:

#include <wx/gdicmn.h>

bool wxColourDisplay ( )

Returns true if the display is colour, false otherwise.

Include file:

#include <wx/gdicmn.h>

int wxDisplayDepth ( )

Returns the depth of the display (a value of 1 denotes a monochrome display).

Include file:

#include <wx/gdicmn.h>

void wxDisplaySize	(	int *	width,
		int *	height
	)

Returns the display size in pixels.

For the version taking width and header arguments, either of them can be NULL if the caller is not interested in the returned value.

Include file:

#include <wx/gdicmn.h>

void wxDisplaySizeMM	(	int *	width,
		int *	height
	)

Returns the display size in millimeters.

For the version taking width and header arguments, either of them can be NULL if the caller is not interested in the returned value.

参照:: wxGetDisplayPPI()

Include file:

#include <wx/gdicmn.h>

wxRect wxGetClientDisplayRect ( )

wxSize wxGetDisplayPPI ( )

Returns the display resolution in pixels per inch.

The x component of the returned wxSize object contains the horizontal resolution and the y one -- the vertical resolution.

Include file:

#include <wx/gdicmn.h>

Since:: 2.9.0

wxSize wxGetDisplaySize ( )

wxSize wxGetDisplaySizeMM ( )

bool wxIsDragResultOk ( wxDragResult res )

Returns true if res indicates that something was done during a DnD operation, i.e.

is neither error nor none nor cancel.

bool wxMakeMetafilePlaceable	(	const wxString &	filename,
		int	minX,
		int	minY,
		int	maxX,
		int	maxY,
		float	scale = `1.0`
	)

Given a filename for an existing, valid metafile (as constructed using wxMetafileDC) makes it into a placeable metafile by prepending a header containing the given bounding box.

The bounding box may be obtained from a device context after drawing into it, using the functions wxDC::MinX(), wxDC::MinY(), wxDC::MaxX() and wxDC::MaxY().

In addition to adding the placeable metafile header, this function adds the equivalent of the following code to the start of the metafile data:

    SetMapMode(dc, MM_ANISOTROPIC);
    SetWindowOrg(dc, minX, minY);
    SetWindowExt(dc, maxX - minX, maxY - minY);

This simulates the wxMM_TEXT mapping mode, which wxWidgets assumes.

Placeable metafiles may be imported by many Windows applications, and can be used in RTF (Rich Text Format) files.

scale allows the specification of scale for the metafile.

This function is only available under Windows.

Include file:

#include <wx/metafile.h>

void wxSetCursor ( const wxCursor & cursor )

Globally sets the cursor; only has an effect on Windows, Mac and GTK+.

You should call this function with wxNullCursor to restore the system cursor.

参照:: wxCursor, wxWindow::SetCursor()

Include file:

#include <wx/gdicmn.h>

Detailed Description

Defines

Functions

Define Documentation

Function Documentation