Class: GraphicsMedium

• Inheritance
• Description
• Instance protocol
  • Compatibility-Squeak
  • accessing
  • copying
  • filling
  • initialization

Inheritance:

   Object
   |
   +--GraphicsContext
      |
      +--DeviceGraphicsContext
         |
         +--GraphicsMedium
            |
            +--DisplaySurface
            |
            +--Form
            |
            +--PrinterContext

Package:

stx:libview

Category:

Graphics-Support

Version:

rev: 1.19 date: 2009/08/07 10:52:03

user: sr

file: GraphicsMedium.st directory: libview

module: stx stc-classLibrary: libview

Author:

Claus Gittinger

Description:

this is an abstract superclass for all kinds of drawables which
have a physical representation (i.e. have an extent). Dont use messages
from here - it will vanish soon.

[Instance variables:]

    width           <SmallInteger>  the width (device dependent, usually pixels or inches)
    height          <SmallInteger>  the height (device dependent, usually pixels or inches)

Instance protocol:

 copyBits: aRectangle from: aForm at: srcOrigin clippingBox: clippingBox rule: rule fillColor: fillColor

 fill: aRectangle fillColor: aColor

fill the rectangular area specified by aRectangle with the black color

 fillBlack: aRectangle

fill the rectangular area specified by aRectangle with the black color

 fillColor: something

fill the receiver with something;
something may be a Form, Color or colorIndex

 fillWhite: aRectangle

fill the rectangular area specified by aRectangle with the white color

 bottomCenter

return the topCenter point

 bottomLeft

return the bottomLeft point

 boundingBox

 center

return the point at the center of the receiver

 corner

return the corner point i.e. the bottom-right point

 corner: aPoint

set the corner point i.e. change extent so that corner will be
aPoint while leaving the origin unchanging

 extent

return the extent i.e. a point with width as x, height as y
coordinate

 extent: extent

set the extent

 height

return the height of the receiver

 height: anInteger

set the height of the receiver

 left

return the left i.e. x-coordinate of top-left of the receiver

 leftCenter

return the leftCenter point

 origin

return the origin i.e. coordinate of top-left of the receiver

 realized

return true, if the receiver is realized.
The receiver may still be unmapped, if the container is unrealized.
Use reallyRealized to make certain that I am really mapped.

 reallyRealized

return true, if the receiver is realized and all containers
are realized.

 rightCenter

return the leftCenter point

 setWidth: w height: h

set both width and height - not to be redefined

 top

return the top i.e. y-coordinate of top-left of the receiver

 topCenter

return the topCenter point

 topRight

return the topRight point

 viewBackground

for protocol compatibility with view; return my background paint color here

 width

return the width of the receiver

 width: anInteger

set the width of the receiver

 width: w height: h

set both width and height of the receiver

 postCopy

this may not be enough to allow copying of views ...

 postDeepCopy

 black

fill the receiver with black

 clear

clear the receiver with background

 clearInside

clear the receiver with background - ST-80 compatibility

 clearRectangle: aRectangle

clear the rectangular area in the receiver to background

 clearRectangleX: left y: top width: w height: h

clear the rectangular area in the receiver to background

 clearView

clear the receiver with background

 fill: something

fill the receiver with something;
something may be a Form, Color or colorIndex

 invertRectangle: aRectangle

invert a rectangle in the receiver

 white

fill the receiver with white

 initialize

set up some useful default values

 setRealized: aBoolean

low level special interface to manipulate the realized state.
Non-public interface, only to be used by experts.
(use to pretend a view has been realized - for example with alien views)