Ubuntu Manpage: xcb_create_window

Provided by: libxcb-doc_1.15-1ubuntu2_all

NAME

       xcb_create_window - Creates a window

SYNOPSIS

       #include <xcb/xproto.h>

   Request function

       xcb_void_cookie_t xcb_create_window(xcb_connection_t *conn, uint8_t depth, xcb_window_t wid,
              xcb_window_t parent, int16_t x, int16_t y, uint16_t width, uint16_t height, uint16_t border_width,
              uint16_t _class, xcb_visualid_t visual, uint32_t value_mask, const void *value_list);

REQUEST ARGUMENTS

conn The XCB connection to X11.

depth Specifies the new window's depth (TODO: what unit?).

The special value XCB_COPY_FROM_PARENT means the depth is taken from the parent window.

wid The ID with which you will refer to the new window, created by xcb_generate_id.

parent The parent window of the new window.

x The X coordinate of the new window.

y The Y coordinate of the new window.

width The width of the new window.

height The height of the new window.

border_width
TODO:

Must be zero if the class is InputOnly or a xcb_match_error_t occurs.

_class One of the following values:

XCB_WINDOW_CLASS_COPY_FROM_PARENT
TODO: NOT YET DOCUMENTED.

XCB_WINDOW_CLASS_INPUT_OUTPUT
TODO: NOT YET DOCUMENTED.

XCB_WINDOW_CLASS_INPUT_ONLY
TODO: NOT YET DOCUMENTED.

visual Specifies the id for the new window's visual.

The special value XCB_COPY_FROM_PARENT means the visual is taken from the parent window.

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 Config‐
ureWindow).

XCB_CW_BACKING_STORE
A backing-store of WhenMapped advises the server that maintaining contents of ob‐
scured regions when the window is mapped would be beneficial. A backing-store of Al‐
ways 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 Copy‐
FromParent 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 be‐
tween the child and the parent, not by making a complete copy of the colormap con‐
tents.

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 win‐
dow, and any change in the parent's cursor will cause an immediate change in the dis‐
played cursor.
TODO: NOT YET DOCUMENTED.

value_list
TODO: NOT YET DOCUMENTED.

DESCRIPTION

       Creates an unmapped window as child of the specified parent window. A CreateNotify event will be generat‐
       ed. The new window is placed on top in the stacking order with respect to siblings.

       The coordinate system has the X axis horizontal and the Y axis vertical with the origin [0, 0] at the up‐
       per-left corner. Coordinates are integral, in terms of pixels, and coincide with pixel centers. Each win‐
       dow and pixmap has its own coordinate system. For a window, the origin is inside the border  at  the  in‐
       side, upper-left corner.

       The created window is not yet displayed (mapped), call xcb_map_window to display it.

       The created window will initially use the same cursor as its parent.

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_create_window_checked. See
       xcb-requests(3) for details.

ERRORS

       xcb_alloc_error_t
                 The X server could not allocate the requested resources (no memory?).

       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
                 TODO: reasons?

AUTHOR

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

X Version 11                                       libxcb 1.15                              xcb_create_window(3)