4.2 Translating Screen Coordinates

Applications sometimes need to perform a coordinate transformation from the coordinate space of one window to another window or need to determine which window the pointing device is in. XTranslateCoordinates() and XQueryPointer() fulfill these needs (and avoid any race conditions) by asking the X server to perform these operations.

To obtain the screen coordinates of the pointer or to determine the pointer coordinates relative to a specified window, use XQueryPointer().

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Christophe Tronche, ch@tronche.com