If not @nil,
no pixels outside this area are affected. The area of the entire device
is the intersection of the union of the area's of all graphicals and the
clip_area.
The variable is defined at the level of class device
for technical reasons. The clip_area mechanism is activated at the level
of class figure.
Defaults: @nil
(no clipping is done).
When not @nil,
the positions of the graphicals displayed on the device is computed
using the attached format.
If a device has a device<-format,
graphicals cannot be moved any more. Also, the position argument of device->display
is simply ignored.
- See also
- class format
Chain of graphicals displayed on the device. The first graphical is the
one that is entirely in the background; the last is entirely in the
foreground. See graphical->expose
and friends to change the stacking order of overlapping graphicals.
The contents of this chain may be queried but not changed. Use the
manipulation behaviour defined on devices and graphicals to change the
contents of the device. Note that the collection enumeration
methods
device->for_all
and device->for_some
are also available for devices. The following example changes the pen
thickness of all graphicals of a device to 2:
send(Device, for_some, @default,
message(@arg1, pen, 2)),
- See also
- - device
<-contains
- graphical-device
- device<-member
- device->for_some
- device->for_all
Nesting depth from the window. The window itself has device<-level
equals 0. Used for quick detection of a common device for two
graphicals.
See also device->reparent.
Chain of (graphical) members whose bounding-box overlap the position of
the mouse. Internally used to generate area_enter and area_exit events
and perform event-dispatching. May be used from code that handles an
event to detect which graphicals overlap the mouse-position.
The first element of this chain is the top-most graphical. The others
are further and further in the background.
- See also
- - device
->update_pointed
- device<-pointed_objects
