table of contents
XGrabButton(3) | XLIB FUNCTIONS | XGrabButton(3) |
NAME¶
XGrabButton, XUngrabButton - grab pointer buttonsSYNTAX¶
int XGrabButton(Display *display, unsigned int
button, unsigned int modifiers, Window grab_window, Bool
owner_events, unsigned int event_mask, int pointer_mode,
keyboard_mode, Window confine_to, Cursor cursor);
int XUngrabButton(Display *display, unsigned int
button, unsigned int modifiers, Window
grab_window);
ARGUMENTS¶
- button
- Specifies the pointer button that is to be grabbed or released or AnyButton.
- confine_to
- Specifies the window to confine the pointer in or None.
- cursor
- Specifies the cursor that is to be displayed or None.
- display
- Specifies the connection to the X server.
- event_mask
- Specifies which pointer events are reported to the client. The mask is the bitwise inclusive OR of the valid pointer event mask bits.
- grab_window
- Specifies the grab window.
- keyboard_mode
- Specifies further processing of keyboard events. You can pass GrabModeSync or GrabModeAsync.
- modifiers
- Specifies the set of keymasks or AnyModifier. The mask is the bitwise inclusive OR of the valid keymask bits.
- owner_events
- Specifies a Boolean value that indicates whether the pointer events are to be reported as usual or reported with respect to the grab window if selected by the event mask.
- pointer_mode
- Specifies further processing of pointer events. You can pass GrabModeSync or GrabModeAsync.
DESCRIPTION¶
The XGrabButton function establishes a passive grab. In the future, the pointer is actively grabbed (as for XGrabPointer), the last-pointer-grab time is set to the time at which the button was pressed (as transmitted in the ButtonPress event), and the ButtonPress event is reported if all of the following conditions are true:- •
- The pointer is not grabbed, and the specified button is logically pressed when the specified modifier keys are logically down, and no other buttons or modifier keys are logically down.
- •
- The grab_window contains the pointer.
- •
- The confine_to window (if any) is viewable.
- •
- A passive grab on the same button/key combination does not exist on any ancestor of grab_window.
DIAGNOSTICS¶
- BadCursor
- A value for a Cursor argument does not name a defined Cursor.
- BadValue
- Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.
- BadWindow
- A value for a Window argument does not name a defined Window.
SEE ALSO¶
XAllowEvents(3), XGrabPointer(3), XGrabKey(3), XGrabKeyboard(3),libX11 1.6.2 | X Version 11 |