720 lines
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20 KiB
HTML
720 lines
No EOL
20 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Application Window Properties</TITLE
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HREF="x208.html"><LINK
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TITLE="Window Manager Protocols"
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HREF="x340.html"></HEAD
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="AEN225"
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>5. Application Window Properties</A
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></H1
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN227"
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>5.1. _NET_WM_NAME</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_NAME, UTF8_STRING</PRE
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><P
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>The Client SHOULD set this to the title of the window in UTF-8 encoding. If
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set, the Window Manager should use this in preference to WM_NAME.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN231"
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>5.2. _NET_WM_VISIBLE_NAME</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_VISIBLE_NAME, UTF8_STRING</PRE
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><P
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>If the Window Manager displays a window name other than _NET_WM_NAME the Window Manager MUST set this to the title displayed in UTF-8 encoding.
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</P
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><P
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>Rationale: For window managers that display a title different from the _NET_WM_NAME or WM_NAME of the window (i.e. xterm <1>, xterm <2>, ... is shown, but _NET_WM_NAME / WM_NAME is still xterm for each window). This property allows taskbars / pagers to display the same title as the window manager.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN236"
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>5.3. _NET_WM_ICON_NAME</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_ICON_NAME, UTF8_STRING</PRE
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><P
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>The Client SHOULD set this to the title of the icon for this window in UTF-8
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encoding. If set, the Window Manager should use this in preference to
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WM_ICON_NAME.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN240"
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>5.4. _NET_WM_VISIBLE_ICON_NAME</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_VISIBLE_ICON_NAME, UTF8_STRING</PRE
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><P
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>If the Window Manager displays an icon name other than _NET_WM_ICON_NAME
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the Window Manager MUST set this to the title displayed in UTF-8 encoding.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN244"
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>5.5. _NET_WM_DESKTOP</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_DESKTOP desktop, CARDINAL/32</PRE
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><P
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>Cardinal to determine the desktop the window is in (or wants to be) starting
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with 0 for the first desktop. A Client MAY choose not to set this property,
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in which case the Window Manager SHOULD place as it wishes. 0xFFFFFFFF
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indicates that the window SHOULD appear on all desktops/workspaces.
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</P
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><P
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>The Window Manager should honor _NET_WM_DESKTOP whenever a withdrawn window
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requests to be mapped.
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</P
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><P
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>The Window Manager should remove the property whenever
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a window is withdrawn, but it should leave the property in place when it is
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shutting down, e.g. in response to losing ownership of the WM_Sn manager
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selection.
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</P
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><P
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>Rationale: Removing the property upon window withdrawal helps legacy
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applications which want to reuse withdrawn windows. Not removing the property
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upon shutdown allows the next Window Manager to restore windows to their
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previous desktops.
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</P
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><P
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>A Client can request a change of desktop for a non-withdrawn window by sending
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a _NET_WM_DESKTOP client message to the root window:
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_DESKTOP
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window = the respective client window
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message_type = _NET_WM_DESKTOP
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format = 32
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data.l[0] = new_desktop</PRE
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><P
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> The Window Manager MUST keep this property updated on all windows.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN254"
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>5.6. _NET_WM_WINDOW_TYPE</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_WINDOW_TYPE, ATOM[]/32</PRE
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><P
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>This SHOULD be set by the Client before mapping, to a list of atoms indicating
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the functional type of the window. This property SHOULD be used by the window
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manager in determining the decoration, stacking position and other behaviour
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of the window. The Client SHOULD specify window types in order of preference
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(the first being most preferable), but MUST include at least one of the basic
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window type atoms from the list below. This is to allow for extension of the
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list of types, whilst providing default behaviour for window managers that do
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not recognise the extensions.
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</P
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><P
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>Rationale: This hint is intend to replace the MOTIF hints. One of the
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objections to the MOTIF hints is that they are a purely visual description of
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the window decoration. By describing the function of the window, the window
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manager can apply consistent decoration and behaviour to windows of the same
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type. Possible examples of behaviour include keeping dock/panels on top or
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allowing pinnable menus / toolbars to only be hidden when another window has
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focus (NextStep style).
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_WINDOW_TYPE_DESKTOP, ATOM
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_NET_WM_WINDOW_TYPE_DOCK, ATOM
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_NET_WM_WINDOW_TYPE_TOOLBAR, ATOM
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_NET_WM_WINDOW_TYPE_MENU, ATOM
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_NET_WM_WINDOW_TYPE_UTILITY, ATOM
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_NET_WM_WINDOW_TYPE_SPLASH, ATOM
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_NET_WM_WINDOW_TYPE_DIALOG, ATOM
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_NET_WM_WINDOW_TYPE_NORMAL, ATOM</PRE
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><P
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>_NET_WM_WINDOW_TYPE_DESKTOP indicates a desktop feature. This can include a
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single window containing desktop icons with the same dimensions as the screen,
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allowing the desktop environment to have full control of the desktop, without
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the need for proxying root window clicks.
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</P
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><P
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>_NET_WM_WINDOW_TYPE_DOCK indicates a dock or panel feature. Typically a
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window manager would keep such windows on top of all other windows.
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</P
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><P
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>_NET_WM_WINDOW_TYPE_TOOLBAR and _NET_WM_WINDOW_TYPE_MENU indicate toolbar and
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pinnable menu windows, respectively (i.e. toolbars and menus "torn off" from
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the main application). Windows of this type may set the WM_TRANSIENT_FOR
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hint indicating the main application window.
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</P
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><P
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>_NET_WM_WINDOW_TYPE_UTILITY indicates a small persistent utility window, such as
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a palette or toolbox. It is distinct from type TOOLBAR because it does not
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correspond to a toolbar torn off from the main application. It's distinct from
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type DIALOG because it isn't a transient dialog, the user will probably keep it
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open while they're working. Windows of this type may set the WM_TRANSIENT_FOR
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hint indicating the main application window.
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</P
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><P
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>_NET_WM_WINDOW_TYPE_SPLASH indicates that the window is a splash screen
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displayed as an application is starting up.
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</P
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><P
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>_NET_WM_WINDOW_TYPE_DIALOG indicates that this is a dialog window. If
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_NET_WM_WINDOW_TYPE is not set, then windows with WM_TRANSIENT_FOR set MUST
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be taken as this type.
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</P
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><P
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>_NET_WM_WINDOW_TYPE_NORMAL indicates that this is a normal, top-level window.
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Windows with neither _NET_WM_WINDOW_TYPE nor WM_TRANSIENT_FOR are set MUST
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be taken as this type.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN267"
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>5.7. _NET_WM_STATE</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_STATE, ATOM[]</PRE
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><P
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>A list of hints describing the window state. Atoms present in the list MUST be
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considered set, atoms not present in the list MUST be considered not set. The
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Window Manager SHOULD honor
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_NET_WM_STATE whenever a withdrawn window requests to be mapped. A Client
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wishing to change the state of a window MUST send a _NET_WM_STATE client
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message to the root window (see below). The Window Manager MUST keep this
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property updated to reflect the current state of the window.
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</P
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><P
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>The Window Manager should remove the property whenever
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a window is withdrawn, but it should leave the property in place when it is
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shutting down, e.g. in response to losing ownership of the WM_Sn manager
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selection.
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</P
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><P
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>Rationale: Removing the property upon window withdrawal helps legacy
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applications which want to reuse withdrawn windows. Not removing the property
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upon shutdown allows the next Window Manager to restore windows to their
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previous state.
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</P
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><P
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>Possible atoms are:
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_STATE_MODAL, ATOM
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_NET_WM_STATE_STICKY, ATOM
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_NET_WM_STATE_MAXIMIZED_VERT, ATOM
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_NET_WM_STATE_MAXIMIZED_HORZ, ATOM
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_NET_WM_STATE_SHADED, ATOM
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_NET_WM_STATE_SKIP_TASKBAR, ATOM
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_NET_WM_STATE_SKIP_PAGER, ATOM
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_NET_WM_STATE_HIDDEN, ATOM
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_NET_WM_STATE_FULLSCREEN, ATOM
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_NET_WM_STATE_FLOATING, ATOM</PRE
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><P
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>An implementation MAY add new atoms to this list. Implementations
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without extensions MUST ignore any unknown atoms, effectively removing
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them from the list. These extension atoms MUST NOT start with the prefix
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_NET.
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</P
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><P
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>_NET_WM_STATE_MODAL indicates that this is a modal dialog box. The
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WM_TRANSIENT_FOR hint MUST be set to indicate which window the dialog is a
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modal for, or set to the root window if the dialog is a modal for its window
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group.
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</P
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><P
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>_NET_WM_STATE_STICKY indicates that the Window Manager SHOULD keep the
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window's position fixed on the screen, even when the virtual desktop scrolls.
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</P
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><P
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>_NET_WM_STATE_MAXIMIZED_{VERT,HORZ} indicates that the window is
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{vertically,horizontally} maximised.
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</P
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><P
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>_NET_WM_STATE_SHADED indicates that the window is shaded.
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</P
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><P
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>_NET_WM_STATE_SKIP_TASKBAR indicates that the window should not be
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included on a taskbar. This hint should be requested by the
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application, i.e. it indicates that the window by nature is never
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in the taskbar. Applications should not set this hint if
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_NET_WM_WINDOW_TYPE already conveys the exact nature of the
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window.
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</P
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><P
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>_NET_WM_STATE_SKIP_PAGER indicates that the window should not be
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included on a Pager. This hint should be requested by the application,
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i.e. it indicates that the window by nature is never in the
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Pager. Applications should not set this hint if _NET_WM_WINDOW_TYPE
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already conveys the exact nature of the window.
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</P
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><P
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>_NET_WM_STATE_HIDDEN should be set by the window manager to indicate
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that a window would not be visible on the screen if its
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desktop/viewport were active and its coordinates were within the
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screen bounds. The canonical example is that minimized windows should
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be in the _NET_WM_STATE_HIDDEN state. Pagers and similar applications
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should use _NET_WM_STATE_HIDDEN instead of WM_STATE to decide whether
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to display a window in miniature representations of the windows on a
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desktop.
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<A
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NAME="AEN283"
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HREF="#FTN.AEN283"
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>[1]</A
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>
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</P
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><P
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>_NET_WM_STATE_FULLSCREEN indicates that the window should fill the entire screen
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and have no window decorations. For example, a presentation program would use
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this hint.
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</P
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><P
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>_NET_WM_STATE_FLOATING indicates that the window should be on top of other
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windows of the same type. Applications should not set this hint
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if _NET_WM_WINDOW_TYPE already conveys the exact nature of the window.
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Windows in this state would typically appear above other windows of the same
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_NET_WM_WINDOW_TYPE.
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</P
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><P
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>To change the state of a mapped window, a Client MUST send a _NET_WM_STATE
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client message to the root window (window is the respective window, type
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_NET_WM_STATE, format 32, l[0]=<the action, as listed below>,
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l[1]=<First property to alter>, l[2]=<Second property to alter>).
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This message allows two properties to be changed simultaneously, specifically
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to allow both horizontal and vertical maximisation to be altered together.
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l[2] MUST be set to zero if only one property is to be changed. l[0], the
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action, MUST be one of:
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_STATE_REMOVE 0 /* remove/unset property */
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_NET_WM_STATE_ADD 1 /* add/set property */
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_NET_WM_STATE_TOGGLE 2 /* toggle property */</PRE
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><P
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> See also the implementation notes on <A
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HREF="x351.html#URGENCY"
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>urgency</A
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> and <A
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HREF="x351.html#NORESIZE"
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>fixed size windows</A
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>.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN292"
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>5.8. _NET_WM_ALLOWED_ACTIONS</A
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></H2
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_ALLOWED_ACTIONS, ATOM[]</PRE
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><P
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>A list of atoms indicating user operations that the window manager supports for
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this window. Atoms present in the list indicate allowed actions, atoms not
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present in the list indicate actions that are not supported for this window.
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The window manager MUST keep this property updated to reflect the
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actions which are currently "active" or "sensitive" for a window.
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Taskbars, Pagers, and other tools use _NET_WM_ALLOWED_ACTIONS to
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decide which actions should be made available to the user.
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</P
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><P
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>Possible atoms are:
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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>_NET_WM_ACTION_MOVE, ATOM
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_NET_WM_ACTION_RESIZE, ATOM
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_NET_WM_ACTION_SHADE, ATOM
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_NET_WM_ACTION_STICK, ATOM
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_NET_WM_ACTION_MAXIMIZE_HORZ, ATOM
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_NET_WM_ACTION_MAXIMIZE_VERT, ATOM
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_NET_WM_ACTION_FULLSCREEN, ATOM
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_NET_WM_ACTION_CHANGE_DESKTOP, ATOM
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_NET_WM_ACTION_CLOSE, ATOM</PRE
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><P
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>An implementation MAY add new atoms to this list. Implementations
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without extensions MUST ignore any unknown atoms, effectively removing
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them from the list. These extension atoms MUST NOT start with the prefix
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_NET.
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</P
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><P
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>Note that the actions listed here are those that the <SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>Window
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Manager</I
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></SPAN
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> will honor for this window. The operations must still be
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requested through the normal mechanisms outlined in this specification. For
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example, _NET_WM_ACTION_CLOSE does not mean that clients can send a
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WM_DELETE_WINDOW message to this window; it means that clients can use a
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_NET_CLOSE_WINDOW message to ask the Window Manager to do so.
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</P
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><P
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>Window Managers SHOULD ignore the value of _NET_WM_ALLOWED_ACTIONS when they
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initially manage a window. This value may be left over from a previous window
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manager with different policies.
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</P
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><P
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>_NET_WM_ACTION_MOVE indicates that the window may be moved around the screen.
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</P
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><P
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>_NET_WM_ACTION_RESIZE indicates that the window may be resized.
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(Implementation note: window managers can identify a non-resizable
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window because its minimum and maximum size in WM_NORMAL_HINTS will be the same.)
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</P
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><P
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>_NET_WM_ACTION_SHADE indicates that the window may be shaded.
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</P
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><P
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>_NET_WM_ACTION_STICK indicates that the window may have its sticky state
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toggled (as for _NET_WM_STATE_STICKY). Note that this state has to do with
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viewports, not desktops.
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</P
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><P
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>_NET_WM_ACTION_MAXIMIZE_HORZ indicates that the window may be maximized horizontally.
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</P
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><P
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>_NET_WM_ACTION_MAXIMIZE_VERT indicates that the window may be maximized vertically.
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</P
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><P
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>_NET_WM_ACTION_FULLSCREEN indicates that the window may be brought to
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fullscreen mode.
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</P
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><P
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>_NET_WM_ACTION_CHANGE_DESKTOP indicates that the window may be moved between desktops.
|
|
</P
|
|
><P
|
|
>_NET_WM_ACTION_CLOSE indicates that the window may be closed (i.e. a WM_DELETE_WINDOW
|
|
message may be sent).
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN311"
|
|
>5.9. _NET_WM_STRUT</A
|
|
></H2
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
>_NET_WM_STRUT, left, right, top, bottom, CARDINAL[4]/32</PRE
|
|
><P
|
|
>This property MUST be set by the Client if the window is to reserve space at
|
|
the edge of the screen. The property contains a 4 cardinals specifying the
|
|
width of the reserved area at each border of the screen.
|
|
The order of the borders is left, right, top, bottom.
|
|
The client MAY change this property anytime, therefore the Window Manager MUST
|
|
watch out for property notify events.
|
|
</P
|
|
><P
|
|
>The purpose of struts is to reserve space at the borders of the desktop. This
|
|
is very useful for a docking area, a taskbar or a panel, for instance. The
|
|
window manager should know about this reserved space in order to be able to
|
|
preserve the space. Also maximized windows should not cover that reserved
|
|
space.
|
|
</P
|
|
><P
|
|
>Rationale: A simple "do not cover" hint is not enough for dealing with e.g.
|
|
auto-hide panels.
|
|
</P
|
|
><P
|
|
>Notes: An auto-hide panel SHOULD set the strut to be its minimum, hidden size.
|
|
A "corner" panel that does not extend for the full length of a screen border
|
|
SHOULD only set one strut.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN318"
|
|
>5.10. _NET_WM_ICON_GEOMETRY</A
|
|
></H2
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
>_NET_WM_ICON_GEOMETRY, x, y, width, height, CARDINAL[4]/32</PRE
|
|
><P
|
|
>This optional property MAY be set by standalone tools like a taskbar or an
|
|
iconbox. It specifies the geometry of a possible icon in case the window is iconified.
|
|
</P
|
|
><P
|
|
>Rationale: This makes it possible for a window manager to display a nice
|
|
animation like morphing the window into its icon.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN323"
|
|
>5.11. _NET_WM_ICON</A
|
|
></H2
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
>_NET_WM_ICON CARDINAL[][2+n]/32</PRE
|
|
><P
|
|
>This is an array of possible icons for the client. This specification does
|
|
not stipulate what size these icons should be, but individual desktop
|
|
environments or toolkits may do so. The Window Manager MAY scale any of these
|
|
icons to an appropriate size.
|
|
</P
|
|
><P
|
|
>This is an array of 32bit packed CARDINAL ARGB with high byte being A, low
|
|
byte being B. First two cardinals are width, height. Data is in rows, left to
|
|
right and top to bottom.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN328"
|
|
>5.12. _NET_WM_PID</A
|
|
></H2
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
>_NET_WM_PID CARDINAL/32</PRE
|
|
><P
|
|
>If set, this property MUST contain the process ID of the client owning this
|
|
window. This MAY be used by the Window Manager to kill windows which do not
|
|
respond to the _NET_WM_PING protocol.
|
|
</P
|
|
><P
|
|
>If _NET_WM_PID is set, the ICCCM-specified property WM_CLIENT_MACHINE
|
|
MUST also be set. While the ICCCM only requests that WM_CLIENT_MACHINE is set
|
|
<SPAN
|
|
CLASS="QUOTE"
|
|
>" to a string that forms the name of the machine running the client as
|
|
seen from the machine running the server"</SPAN
|
|
> conformance to this
|
|
specification requires that WM_CLIENT_MACHINE be set to the fully-qualified domain
|
|
name of the client's host.
|
|
</P
|
|
><P
|
|
>See also the implementation notes on <A
|
|
HREF="x351.html#KILLINGWINDOWS"
|
|
>killing hung processes</A
|
|
>.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN336"
|
|
>5.13. _NET_WM_HANDLED_ICONS</A
|
|
></H2
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
>_NET_WM_HANDLED_ICONS</PRE
|
|
><P
|
|
>This property can be set by clients to indicate that the Window Manager need
|
|
not provide icons for iconified windows, for example if the client is a taskbar
|
|
and provides buttons for iconified windows.
|
|
</P
|
|
></DIV
|
|
></DIV
|
|
><H3
|
|
CLASS="FOOTNOTES"
|
|
>Notes</H3
|
|
><TABLE
|
|
BORDER="0"
|
|
CLASS="FOOTNOTES"
|
|
WIDTH="100%"
|
|
><TR
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
WIDTH="5%"
|
|
><A
|
|
NAME="FTN.AEN283"
|
|
HREF="x225.html#AEN283"
|
|
>[1]</A
|
|
></TD
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
WIDTH="95%"
|
|
><P
|
|
>Implementation note: if an application asks to toggle
|
|
_NET_WM_STATE_HIDDEN the window manager should probably just ignore
|
|
the request, since _NET_WM_STATE_HIDDEN is a function of some other
|
|
aspect of the window such as minimization, rather than an independent
|
|
state.</P
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
><DIV
|
|
CLASS="NAVFOOTER"
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"><TABLE
|
|
SUMMARY="Footer navigation table"
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="x208.html"
|
|
ACCESSKEY="P"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="index.html"
|
|
ACCESSKEY="H"
|
|
>Home</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="x340.html"
|
|
ACCESSKEY="N"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
>Other Root Window Messages</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
> </TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>Window Manager Protocols</TD
|
|
></TR
|
|
></TABLE
|
|
></DIV
|
|
></BODY
|
|
></HTML
|
|
> |