gdkPointerGrab: gdkPointerGrab
Description
Grabs the pointer (usually a mouse) so that all events are passed to this
application until the pointer is ungrabbed with gdkPointerUngrab, or
the grab window becomes unviewable.
This overrides any previous pointer grab by this client.Usage
gdkPointerGrab(window, owner.events = FALSE, event.mask = 0, confine.to = NULL, cursor = NULL, time = "GDK_CURRENT_TIME")
Value
[GdkGrabStatus] GDK_GRAB_SUCCESS if the grab was successful.Details
Pointer grabs are used for operations which need complete control over mouse
events, even if the mouse leaves the application.
For example in GTK+ it is used for Drag and Drop, for dragging the handle in
the GtkHPaned and GtkVPaned widgets, and for resizing columns in GtkCList
widgets.
Note that if the event mask of an X window has selected both button press and
button release events, then a button press event will cause an automatic
pointer grab until the button is released.
X does this automatically since most applications expect to receive button
press and release events in pairs.
It is equivalent to a pointer grab on the window with owner.events set to
TRUE.
If you set up anything at the time you take the grab that needs to be cleaned
up when the grab ends, you should handle the GdkEventGrabBroken events that
are emitted when the grab ends unvoluntarily.