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.