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4. Other Root Window Messages

4.1. _NET_CLOSE_WINDOW

_NET_CLOSE_WINDOW

Pagers wanting to close a window MUST send a _NET_CLOSE_WINDOW client - message request to the root window: -

_NET_CLOSE_WINDOW
-  window = window to close
-  message_type = _NET_CLOSE_WINDOW
-  format = 32
-  data.l[0] = 0 /* may be used later */

The Window Manager MUST then attempt to close the window specified. -

Rationale: A Window Manager might be more clever than the usual method (send WM_DELETE message if the protocol is selected, XKillClient otherwise). It might introduce a timeout, for example. Instead of duplicating the code, the Window Manager can easily do the job. -

4.2. _NET_WM_MOVERESIZE

_NET_WM_MOVERESIZE
-  window = window to be moved or resized
-  message_type = _NET_WM_MOVERESIZE
-  format = 32
-  data.l[0] = x_root 
-  data.l[1] = y_root
-  data.l[2] = direction
-  data.l[3] = button

This message allows an application to initiate window movement or - resizing. This allows the application to define its own move and size - "grips", whilst letting the window manager control the actual operation. - This means that all moves/resizes can happen in a consistent manner as - defined by the WM. -

When sending this message in response to a button press event, button - SHOULD indicate the button which was pressed, x_root and y_root MUST - indicate the position of the button press with respect to the root - window and direction MUST indicate whether this is a move or resize - event, and if it is a resize event, which edges of the window the size - grip applies to. When sending this message in response to a key event, - the direction MUST indicate wether this this is a move or resize event - and the other fields are unused. -

#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT      0
-#define _NET_WM_MOVERESIZE_SIZE_TOP          1
-#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT     2
-#define _NET_WM_MOVERESIZE_SIZE_RIGHT        3
-#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT  4
-#define _NET_WM_MOVERESIZE_SIZE_BOTTOM       5
-#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT   6
-#define _NET_WM_MOVERESIZE_SIZE_LEFT         7
-#define _NET_WM_MOVERESIZE_MOVE              8   /* movement only */
-#define _NET_WM_MOVERESIZE_SIZE_KEYBOARD     9   /* size via keyboard */
-#define _NET_WM_MOVERESIZE_MOVE_KEYBOARD    10   /* move via keyboard */

The Client MUST release all grabs prior to sending such message. -

The Window Manager can use the button field to determine the - events on which it terminates the operation initiated by the - _NET_WM_MOVERESIZE message. Since there is a race condition between - client sending the _NET_WM_MOVERESIZE message and the user releasing - the button, Window Managers are advised to offer some other means to - terminate the operation, e.g. by pressing the ESC key. -

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