Class: HostGraphicsDevice

• Inheritance
• Description
• Related information
• Instance protocol
  • Compatibility-Squeak
  • accessing
  • accessing & queries
  • initialization & release
  • misc
  • registration

Inheritance:

   Object
   |
   +--GraphicsDevice
      |
      +--HostGraphicsDevice
         |
         +--DeviceWorkstation

Package:

stx:libview

Category:

Interface-Graphics

Version:

rev: 1.24 date: 2006/08/07 13:06:44

user: fm

file: HostGraphicsDevice.st directory: libview

module: stx stc-classLibrary: libview

Author:

Claus Gittinger

Description:

this abstract class was inserted to provide a home for ST-80 classes
(previously, DeviceWorkstation was directly under Object).
We will (over time) move common functionality from there into this class.

In ST/X, this is mostly dummy.

Related information:

    DeviceWorkstation
    XWorkstation

Instance protocol:

 deferUpdates: aBoolean

Set the deferUpdates flag in the virtual machine.
When this flag is true, BitBlt operations on the Display are not
automatically propagated to the screen.
If this underlying platform does not support deferred updates,
this primitive will fail.
Answer the receiver if the primitive succeeds, nil if it fails.

 forceDisplayUpdate

On platforms that buffer screen updates,
force the screen to be updated immediately.
On other platforms, or if the primitive is not implemented, do nothing.

 deviceColors

return the registry keeping track of colors which were allocated
on this device.

 deviceCursors

return the registry keeping track of cursors which were allocated
on this device.

 deviceFonts

return the registry keeping track of fonts which were allocated
on this device.

 deviceForms

return the registry keeping track of forms which were allocated
on this device.

 deviceViews

return the registry keeping track of views which were allocated
on this device.

 defaultExtentForTopViews

 initializeDeviceResourceTables

 releaseDeviceColors

 releaseDeviceCursors

 releaseDeviceFonts

 recolorCursorsToFgColor: fgColor defaultBgColor: bgColor

change the colors of all existing cursors

 registerColor: aColor

 registerCursor: aCursor

 registerFont: aFont

 registerForm: aForm

 registerView: aView

 unregisterColor: aColor

 unregisterCursor: aCursor

 unregisterFont: aFont

 unregisterForm: aForm

 unregisterView: aView