Canvas
Last updated at 9:50 pm UTC on 29 September 2017
Abstract class used by Morphic. Contains the interface to draw Morphs.
A canvas is a two-dimensional medium on which morphs are drawn in a device-independent manner. Canvases keep track of the origin and clipping rectangle, as well as the underlying drawing medium (such as a window, pixmap, or postscript script).
Subclasses must implement (at least) the following methods:
* Drawing:
#fillOval:color:borderWidth:borderColor:
#frameAndFillRectangle:fillColor:borderWidth:borderColor:
#drawPolygon:color:borderWidth:borderColor:
#image:at:sourceRect:rule:
#stencil:at:sourceRect:rule:
#line:to:width:color:
#paragraph:bounds:color:
#text:bounds:font:color:
* Support
#clipBy:during:
#translateBy:during:
#translateBy:clippingTo:during:
#transformBy:clippingTo:during:
Canvas printHierarchy '
ProtoObject #()
Object #()
NullEncoder #(''target'' ''filterSelector'')
FlattenEncoder #()
Canvas #()
ColorMappingCanvas #(''myCanvas'')
AlphaBlendingCanvas #(''alpha'')
ShadowDrawingCanvas #(''shadowColor'')
FormCanvas #(''origin'' ''clipRect'' ''form'' ''port'' ''shadowColor'')
BalloonCanvas #(''transform'' ''colorTransform'' ''engine'' ''aaLevel'' ''deferred'')
BlueFormCanvas #()
ColorPatchCanvas #(''stopMorph'' ''foundMorph'' ''doStop'')
MultiResolutionCanvas #(''deferredMorphs'')
PluggableCanvas #()
BufferedCanvas #(''remote'' ''previousVersion'' ''lastTick'' ''dirtyRect'' ''mirrorOfScreen'')
CachingCanvas #(''cacheCanvas'' ''mainCanvas'')
ClippingCanvas #(''canvas'' ''clipRect'')
MultiCanvas #(''canvases'' ''extent'' ''depth'')
NullCanvas #()
PostscriptCanvas #(''origin'' ''clipRect'' ''currentColor'' ''shadowColor'' ''currentFont'' ''morphLevel'' ''gstateStack'' ''fontMap''
''usedFonts'' ''psBounds'' ''topLevelMorph'' ''initialScale'' ''savedMorphExtent'' ''currentTransformation''
''printSpecs'' ''pages'')
DSCPostscriptCanvas #()
DSCPostscriptCanvasToDisk #()
EPSCanvas #()
RemoteCanvas #(''innerClipRect'' ''outerClipRect'' ''transform'' ''connection'' ''shadowColor'')'
