tcldoc Tcl/Tk 9.0.4
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Tk_GetRootCoords C API

Compute root-window coordinates of window

literal type exactly as shown argument replace with your value ?optional? may be omitted

Synopsis#

#include <tk.h>

Tk_GetRootCoords(tkwin, xPtr, yPtr)#

Arguments#

Tk_Window tkwin (in)

Token for window.

int *xPtr (out)

Pointer to location in which to store root-window x-coordinate corresponding to left edge of tkwin's border.

int *yPtr (out)

Pointer to location in which to store root-window y-coordinate corresponding to top edge of tkwin's border.

Description#

This procedure scans through the structural information maintained by Tk to compute the root-window coordinates corresponding to the upper-left corner of tkwin's border. If tkwin has no border, then Tk_GetRootCoords returns the root-window coordinates corresponding to location (0,0) in tkwin. Tk_GetRootCoords is relatively efficient, since it does not have to communicate with the X server.

Keywords#

coordinates · root window

Copyright#