Ubuntu Manpage: xcb_change_window_attributes

Provided by: libxcb-doc_1.13-2~ubuntu18.04_all

NAME

       xcb_change_window_attributes - change window attributes

SYNOPSIS

       #include <xcb/xproto.h>

   Request function
       xcb_void_cookie_t xcb_change_window_attributes(xcb_connection_t *conn, xcb_window_t window,
              uint32_t value_mask, const void *value_list);

REQUEST ARGUMENTS

conn The XCB connection to X11.

window The window to change.

value_mask
One of the following values:

XCB_CW_BACK_PIXMAP
Overrides the default background-pixmap. The background pixmap and window must have
the same root and same depth. Any size pixmap can be used, although some sizes may be
faster than others.

If XCB_BACK_PIXMAP_NONE is specified, the window has no defined background. The
server may fill the contents with the previous screen contents or with contents of
its own choosing.

If XCB_BACK_PIXMAP_PARENT_RELATIVE is specified, the parent's background is used, but
the window must have the same depth as the parent (or a Match error results). The
parent's background is tracked, and the current version is used each time the window
background is required.

XCB_CW_BACK_PIXEL
Overrides BackPixmap. A pixmap of undefined size filled with the specified background
pixel is used for the background. Range-checking is not performed, the background
pixel is truncated to the appropriate number of bits.

XCB_CW_BORDER_PIXMAP
Overrides the default border-pixmap. The border pixmap and window must have the same
root and the same depth. Any size pixmap can be used, although some sizes may be
faster than others.

The special value XCB_COPY_FROM_PARENT means the parent's border pixmap is copied
(subsequent changes to the parent's border attribute do not affect the child), but
the window must have the same depth as the parent.

XCB_CW_BORDER_PIXEL
Overrides BorderPixmap. A pixmap of undefined size filled with the specified border
pixel is used for the border. Range checking is not performed on the border-pixel
value, it is truncated to the appropriate number of bits.

XCB_CW_BIT_GRAVITY
Defines which region of the window should be retained if the window is resized.

XCB_CW_WIN_GRAVITY
Defines how the window should be repositioned if the parent is resized (see
ConfigureWindow).

XCB_CW_BACKING_STORE
A backing-store of WhenMapped advises the server that maintaining contents of
obscured regions when the window is mapped would be beneficial. A backing-store of
Always advises the server that maintaining contents even when the window is unmapped
would be beneficial. In this case, the server may generate an exposure event when the
window is created. A value of NotUseful advises the server that maintaining contents
is unnecessary, although a server may still choose to maintain contents while the
window is mapped. Note that if the server maintains contents, then the server should
maintain complete contents not just the region within the parent boundaries, even if
the window is larger than its parent. While the server maintains contents, exposure
events will not normally be generated, but the server may stop maintaining contents
at any time.

XCB_CW_BACKING_PLANES
The backing-planes indicates (with bits set to 1) which bit planes of the window hold
dynamic data that must be preserved in backing-stores and during save-unders.

XCB_CW_BACKING_PIXEL
The backing-pixel specifies what value to use in planes not covered by backing-
planes. The server is free to save only the specified bit planes in the backing-store
or save-under and regenerate the remaining planes with the specified pixel value. Any
bits beyond the specified depth of the window in these values are simply ignored.

XCB_CW_OVERRIDE_REDIRECT
The override-redirect specifies whether map and configure requests on this window
should override a SubstructureRedirect on the parent, typically to inform a window
manager not to tamper with the window.

XCB_CW_SAVE_UNDER
If 1, the server is advised that when this window is mapped, saving the contents of
windows it obscures would be beneficial.

XCB_CW_EVENT_MASK
The event-mask defines which events the client is interested in for this window (or
for some event types, inferiors of the window).

XCB_CW_DONT_PROPAGATE
The do-not-propagate-mask defines which events should not be propagated to ancestor
windows when no client has the event type selected in this window.

XCB_CW_COLORMAP
The colormap specifies the colormap that best reflects the true colors of the window.
Servers capable of supporting multiple hardware colormaps may use this information,
and window man- agers may use it for InstallColormap requests. The colormap must have
the same visual type and root as the window (or a Match error results). If
CopyFromParent is specified, the parent's colormap is copied (subsequent changes to
the parent's colormap attribute do not affect the child). However, the window must
have the same visual type as the parent (or a Match error results), and the parent
must not have a colormap of None (or a Match error results). For an explanation of
None, see FreeColormap request. The colormap is copied by sharing the colormap object
between the child and the parent, not by making a complete copy of the colormap
contents.

XCB_CW_CURSOR
If a cursor is specified, it will be used whenever the pointer is in the window. If
None is speci- fied, the parent's cursor will be used when the pointer is in the
window, and any change in the parent's cursor will cause an immediate change in the
displayed cursor.

value_list
Values for each of the attributes specified in the bitmask value_mask. The order has to
correspond to the order of possible value_mask bits. See the example.

DESCRIPTION

       Changes the attributes specified by value_mask for the specified window.

RETURN VALUE

       Returns an xcb_void_cookie_t. Errors (if any) have to be handled in the event loop.

       If you want to handle errors directly with xcb_request_check instead, use
       xcb_change_window_attributes_checked. See xcb-requests(3) for details.

ERRORS

       xcb_access_error_t
                 TODO: reasons?

       xcb_colormap_error_t
                 TODO: reasons?

       xcb_cursor_error_t
                 TODO: reasons?

       xcb_match_error_t
                 TODO: reasons?

       xcb_pixmap_error_t
                 TODO: reasons?

       xcb_value_error_t
                 TODO: reasons?

       xcb_window_error_t
                 The specified window does not exist.

AUTHOR

       Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.