Volume 6A: Motif Programming Manual

12.7 Exercise

The following exercise is intended to stimulate and encourage other creative uses of labels and buttons.

Generic X windows have a background pixmap property that can be set using

XSetWindowBackgroundPixmap(). See Volume One, Xlib Programming Manual, for details on

XSetWindowBackgroundPixmap(). Whenever the background pixmap is set, the image is tiled on the

window. If the window is larger than the image, the image is replicated in a checkerboard fashion until the

window's background is filled; if the window is the same size or smaller than the image, the image is centered

in the window. The image is automatically rendered into the window appropriately by the server whenever

necessary. Since widgets have windows, the X Toolkit Intrinsics provides a resource for the Core widget class

that allows you to set the background pixmap using XtN-backgroundPixmap. (Motif's

XmNbackgroundPixmap resource is identical except that the naming convention provides consistency

among resource names.) Write a program that displays a Label that contains both graphics and a text label by

setting both XmNlabelString and XmNbackgroundPixmap to appropriate values.

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12 Labels and Buttons 12.7 Exercise

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