NAME¶
XCreateWindow, XCreateSimpleWindow, XSetWindowAttributes - create windows and
window attributes structure
SYNTAX¶
Window
XCreateWindow(Display * display, Window parent, int x,
int y, unsigned int width, unsigned int height, unsigned
int border_width, int depth, unsigned int class, Visual
*visual, unsigned long valuemask, XSetWindowAttributes
*attributes);
Window
XCreateSimpleWindow(Display * display, Window parent, int
x, int y, unsigned int width, unsigned int height,
unsigned int border_width, unsigned long border, unsigned long
background);
ARGUMENTS¶
- attributes
- Specifies the structure from which the values (as specified
by the value mask) are to be taken. The value mask should have the
appropriate bits set to indicate which attributes have been set in the
structure.
- background
- Specifies the background pixel value of the window.
- border
- Specifies the border pixel value of the window.
- border_width
- Specifies the width of the created window's border in
pixels.
- class
- Specifies the created window's class. You can pass
InputOutput, InputOnly, or CopyFromParent. A class of
CopyFromParent means the class is taken from the parent.
- depth
- Specifies the window's depth. A depth of
CopyFromParent means the depth is taken from the parent.
- display
- Specifies the connection to the X server.
- parent
- Specifies the parent window.
- valuemask
- Specifies which window attributes are defined in the
attributes argument. This mask is the bitwise inclusive OR of the valid
attribute mask bits. If valuemask is zero, the attributes are ignored and
are not referenced.
- visual
- Specifies the visual type. A visual of
CopyFromParent means the visual type is taken from the parent.
- width
-
- height
- Specify the width and height, which are the created
window's inside dimensions and do not include the created window's
borders.
- x
-
- y
- Specify the x and y coordinates, which are the top-left
outside corner of the window's borders and are relative to the inside of
the parent window's borders.
DESCRIPTION¶
The
XCreateWindow function creates an unmapped subwindow for a specified
parent window, returns the window ID of the created window, and causes the X
server to generate a
CreateNotify event. The created 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 upper-left corner. Coordinates are integral, in terms of
pixels, and coincide with pixel centers. Each window and pixmap has its own
coordinate system. For a window, the origin is inside the border at the
inside, upper-left corner.
The border_width for an
InputOnly window must be zero, or a
BadMatch error results. For class
InputOutput, the visual type
and depth must be a combination supported for the screen, or a
BadMatch
error results. The depth need not be the same as the parent, but the parent
must not be a window of class
InputOnly, or a
BadMatch error
results. For an
InputOnly window, the depth must be zero, and the
visual must be one supported by the screen. If either condition is not met, a
BadMatch error results. The parent window, however, may have any depth
and class. If you specify any invalid window attribute for a window, a
BadMatch error results.
The created window is not yet displayed (mapped) on the user's display. To
display the window, call
XMapWindow. The new window initially uses the
same cursor as its parent. A new cursor can be defined for the new window by
calling
XDefineCursor. The window will not be visible on the screen
unless it and all of its ancestors are mapped and it is not obscured by any of
its ancestors.
XCreateWindow can generate
BadAlloc BadColor,
BadCursor,
BadMatch,
BadPixmap,
BadValue, and
BadWindow errors.
The
XCreateSimpleWindow function creates an unmapped
InputOutput
subwindow for a specified parent window, returns the window ID of the created
window, and causes the X server to generate a
CreateNotify event. The
created window is placed on top in the stacking order with respect to
siblings. Any part of the window that extends outside its parent window is
clipped. The border_width for an
InputOnly window must be zero, or a
BadMatch error results.
XCreateSimpleWindow inherits its depth,
class, and visual from its parent. All other window attributes, except
background and border, have their default values.
XCreateSimpleWindow can generate
BadAlloc,
BadMatch,
BadValue, and
BadWindow errors.
STRUCTURES¶
The
XSetWindowAttributes structure contains:
/* Window attribute value mask bits */
#define |
CWBackPixmap |
(1L<<0) |
#define |
CWBackPixel |
(1L<<1) |
#define |
CWBorderPixmap |
(1L<<2) |
#define |
CWBorderPixel |
(1L<<3) |
#define |
CWBitGravity |
(1L<<4) |
#define |
CWWinGravity |
(1L<<5) |
#define |
CWBackingStore |
(1L<<6) |
#define |
CWBackingPlanes |
(1L<<7) |
#define |
CWBackingPixel |
(1L<<8) |
#define |
CWOverrideRedirect |
(1L<<9) |
#define |
CWSaveUnder |
(1L<<10) |
#define |
CWEventMask |
(1L<<11) |
#define |
CWDontPropagate |
(1L<<12) |
#define |
CWColormap |
(1L<<13) |
#define |
CWCursor |
(1L<<14) |
/* Values */
typedef struct {
Pixmap background_pixmap; /* background, None, or ParentRelative */
unsigned long background_pixel; /* background pixel */
Pixmap border_pixmap; /* border of the window or CopyFromParent */
unsigned long border_pixel; /* border pixel value */
int bit_gravity; /* one of bit gravity values */
int win_gravity; /* one of the window gravity values */
int backing_store; /* NotUseful, WhenMapped, Always */
unsigned long backing_planes; /* planes to be preserved if possible */
unsigned long backing_pixel; /* value to use in restoring planes */
Bool save_under; /* should bits under be saved? (popups) */
long event_mask; /* set of events that should be saved */
long do_not_propagate_mask; /* set of events that should not propagate */
Bool override_redirect; /* boolean value for override_redirect */
Colormap colormap; /* color map to be associated with window */
Cursor cursor; /* cursor to be displayed (or None) */
} XSetWindowAttributes;
For a detailed explanation of the members of this structure, see
Xlib - C
Language X Interface.
DIAGNOSTICS¶
- BadAlloc
- The server failed to allocate the requested resource or
server memory.
- BadColor
- A value for a Colormap argument does not name a defined
Colormap.
- BadCursor
- A value for a Cursor argument does not name a defined
Cursor.
- BadMatch
- The values do not exist for an InputOnly
window.
- BadMatch
- Some argument or pair of arguments has the correct type and
range but fails to match in some other way required by the request.
- BadPixmap
- A value for a Pixmap argument does not name a defined
Pixmap.
- BadValue
- Some numeric value falls outside the range of values
accepted by the request. Unless a specific range is specified for an
argument, the full range defined by the argument's type is accepted. Any
argument defined as a set of alternatives can generate this error.
- BadWindow
- A value for a Window argument does not name a defined
Window.
SEE ALSO¶
XChangeWindowAttributes(3),
XConfigureWindow(3),
XDefineCursor(3),
XDestroyWindow(3),
XMapWindow(3),
XRaiseWindow(3),
XUnmapWindow(3)
Xlib - C Language X Interface