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tk_getrootcoords(3) [redhat man page]

Tk_GetRootCoords(3)					       Tk Library Procedures					       Tk_GetRootCoords(3)

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NAME
Tk_GetRootCoords - Compute root-window coordinates of window 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 Tk Tk_GetRootCoords(3)

Check Out this Related Man Page

Tk_GetVRootGeometry(3)					       Tk Library Procedures					    Tk_GetVRootGeometry(3)

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NAME
Tk_GetVRootGeometry - Get location and size of virtual root for window SYNOPSIS
#include <tk.h> Tk_GetVRootGeometry(tkwin, xPtr, yPtr, widthPtr, heightPtr) ARGUMENTS
Tk_Window tkwin (in) Token for window whose virtual root is to be queried. int xPtr (out) Points to word in which to store x-offset of virtual root. int yPtr (out) Points to word in which to store y-offset of virtual root. int widthPtr (out) Points to word in which to store width of virtual root. int heightPtr (out) Points to word in which to store height of virtual root. _________________________________________________________________ DESCRIPTION
Tk_GetVRootGeometry returns geometry information about the virtual root window associated with tkwin. The "associated" virtual root is the one in which tkwin's nearest top-level ancestor (or tkwin itself if it is a top-level window) has been reparented by the window manager. This window is identified by a __SWM_ROOT or __WM_ROOT property placed on the top-level window by the window manager. If tkwin is not associated with a virtual root (e.g. because the window manager does not use virtual roots) then *xPtr and *yPtr will be set to 0 and *widthPtr and *heightPtr will be set to the dimensions of the screen containing tkwin. KEYWORDS
geometry, height, location, virtual root, width, window manager Tk 4.0 Tk_GetVRootGeometry(3)

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