X Utilities to assist the X11 classes. More...

#include <X11Util.h>

Public Member Functions
Bool	X11TestColormapAlloc (::XDisplay *display, XColormap colormap, Bool contig, uInt nColors)
	returns true if nColors can be allocated on the colormap of the display using or not using a contiguous color method.
uInt	X11QueryColorsAvailable (::XDisplay *display, XColormap colormap, Bool contig)
	returns the number of colors presently available on the passed colormap, and display, possibly using contiguous mapping.
const char *	X11DefaultDisplayName ()
	returns a default display name First, search for the DISPLAY environment Else it returns ":0"
::XDisplay *	X11DefaultDisplay ()
	returns an opened display on the default name as above
Screen *	X11DefaultScreen ()
	returns a default screen opened on the default display
Visual *	X11BestVisual (Screen *screen, uInt c_class)
	function returns best visual in given class.
uInt	X11DepthOfVisual (::XDisplay display, Visual visual)
	returns depth of given visual.
Visual *	X11VisualIdToVisual (::XDisplay *display, uInt visualId)
	maps a visualId to a visual
XVisualInfo	X11VisualInfoFromVisual (::XDisplay display, Visual visual)
	gets XVisualInfo for the given Visual
ostream &	operator<< (ostream &os, const XStandardColormap &mapInfo)
	print info on a standard colormap
ostream &	operator<< (ostream &os, Visual *visual)
	print visual information
ostream &	operator<< (ostream &os, Screen *screen)
	print screen information
Bool	X11InitializeStandardColormap (Screen screen, Visual visual, Atom property, XStandardColormap **mapInfo)
	Initialize a Standard Colormap.
Widget	X11TopLevelWidget (Widget w)
	Return the widget that is the top-level widget of this widget.
Widget	X11ContainingShell (Widget w)
	Return the shell widget that contains this widget.

Detailed Description

X Utilities to assist the X11 classes.

Intended use:

Public interface

nope

Prerequisite

Knowledge of X internals

Etymology

Name subject to change

Synopsis

Motivation

Offload some complex functions to utility library, making it a bit easier to manage the X11 code.

Definition at line 76 of file X11Util.h.

Member Function Documentation

ostream& casa::X11Util_global_functions_X11_Utility_Functions::operator<<	(	ostream &	os,
		const XStandardColormap &	mapInfo
	)

print info on a standard colormap

ostream& casa::X11Util_global_functions_X11_Utility_Functions::operator<<	(	ostream &	os,
		Visual *	visual
	)

print visual information

ostream& casa::X11Util_global_functions_X11_Utility_Functions::operator<<	(	ostream &	os,
		Screen *	screen
	)

print screen information

Visual* casa::X11Util_global_functions_X11_Utility_Functions::X11BestVisual	(	Screen *	screen,
		uInt	c_class
	)

function returns best visual in given class.

Best is determined by largest depth

Widget casa::X11Util_global_functions_X11_Utility_Functions::X11ContainingShell ( Widget w )

Return the shell widget that contains this widget.

::XDisplay* casa::X11Util_global_functions_X11_Utility_Functions::X11DefaultDisplay ( )

returns an opened display on the default name as above

const char* casa::X11Util_global_functions_X11_Utility_Functions::X11DefaultDisplayName ( )

returns a default display name First, search for the DISPLAY environment Else it returns ":0"

Screen* casa::X11Util_global_functions_X11_Utility_Functions::X11DefaultScreen ( )

returns a default screen opened on the default display

uInt casa::X11Util_global_functions_X11_Utility_Functions::X11DepthOfVisual	(	::XDisplay *	display,
		Visual *	visual
	)

returns depth of given visual.

The safest way to get the right depth is to match it with XGetVisualInfo and return its depth

Bool casa::X11Util_global_functions_X11_Utility_Functions::X11InitializeStandardColormap	(	Screen *	screen,
		Visual *	visual,
		Atom	property,
		XStandardColormap **	mapInfo
	)

Initialize a Standard Colormap.

If the function succeeds, The passed mapInfo structure will be filled with information about the color cube.

uInt casa::X11Util_global_functions_X11_Utility_Functions::X11QueryColorsAvailable	(	::XDisplay *	display,
		XColormap	colormap,
		Bool	contig
	)

returns the number of colors presently available on the passed colormap, and display, possibly using contiguous mapping.

Bool casa::X11Util_global_functions_X11_Utility_Functions::X11TestColormapAlloc	(	::XDisplay *	display,
		XColormap	colormap,
		Bool	contig,
		uInt	nColors
	)

returns true if nColors can be allocated on the colormap of the display using or not using a contiguous color method.

Widget casa::X11Util_global_functions_X11_Utility_Functions::X11TopLevelWidget ( Widget w )

Return the widget that is the top-level widget of this widget.

Visual* casa::X11Util_global_functions_X11_Utility_Functions::X11VisualIdToVisual	(	::XDisplay *	display,
		uInt	visualId
	)

maps a visualId to a visual

XVisualInfo casa::X11Util_global_functions_X11_Utility_Functions::X11VisualInfoFromVisual	(	::XDisplay *	display,
		Visual *	visual
	)

gets XVisualInfo for the given Visual

The documentation for this struct was generated from the following file:

code/graphics/X11/X11Util.h