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| XmtPatchVisualInheritance(3) | FreeBSD Library Functions Manual | XmtPatchVisualInheritance(3) |
NAME
XmtPatchVisualInheritance() - apply a runtime patch to the Shell widget class so that it handles non-default visuals better.SYNOPSIS
void XmtPatchVisualInheritance(void)
ARGUMENTS
None.DESCRIPTION
The Xt Shell widget class inherits the value of its XtNvisual resource from the shell's parent window-the root window. This means by default shell widgets will always use the default visual of the screen. If you are writing an application that uses a non-default visual, then you will probably want all of your application's windows to use the same visual, to minimize color-flashing as the pointer moves from window to window.Because the Shell widget inherits its XtNvisual resource from its parent window rather than its parent widget, you must explicitly set this resource on all shells that you create. This includes dialog box shell widgets, which are often automatically created for you by convenience routines, and which can be difficult to set resources on.
A simpler solution is to call XmtPatchVisualInheritance() before you call XtAppInitialize() or XmtInitialize(). This function applies a patch to the Shell widget class initialize method so that if its XtNvisual resource is unset, it will inherit its value from its nearest shell widget ancestor (if it has one) rather than from the screen's root window.
Once you have called this function, you need only set the XtNvisual resource for your initial root shell widget; all other shells will inherit this non-default visual.
SEE ALSO
Chapter 4, Using Color,Shell.
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