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<HTML
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>Other Root Window Messages</TITLE
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><H1
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><A
NAME="AEN208"
>4. Other Root Window Messages</A
></H1
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN210"
>4.1. _NET_CLOSE_WINDOW</A
></H2
><PRE
CLASS="PROGRAMLISTING"
>_NET_CLOSE_WINDOW</PRE
><P
> Pagers wanting to close a window MUST send a _NET_CLOSE_WINDOW client
message request to the root window:
</P
><PRE
CLASS="PROGRAMLISTING"
>_NET_CLOSE_WINDOW
window = window to close
message_type = _NET_CLOSE_WINDOW
format = 32
data.l[0] = 0 /* may be used later */</PRE
><P
>The Window Manager MUST then attempt to close the window specified.
</P
><P
> 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.
</P
></DIV
><DIV
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><H2
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><A
NAME="AEN217"
>4.2. _NET_WM_MOVERESIZE</A
></H2
><PRE
CLASS="PROGRAMLISTING"
>_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</PRE
><P
> 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.
</P
><P
> 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.
</P
><PRE
CLASS="PROGRAMLISTING"
>#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 */</PRE
><P
> The Client MUST release all grabs prior to sending such message.
</P
><P
> 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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