Package org.eclipse.jface.text.source
Interface AnnotationPainter.IDrawingStrategy
- All Known Implementing Classes:
AnnotationPainter.NullStrategy
,AnnotationPainter.SquigglesStrategy
- Enclosing class:
- AnnotationPainter
public static interface AnnotationPainter.IDrawingStrategy
A drawing strategy draws the decoration for an annotation onto the text widget.
- Since:
- 3.0
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Method Summary
Modifier and TypeMethodDescriptionvoid
draw
(Annotation annotation, GC gc, StyledText textWidget, int offset, int length, Color color) Draws a decoration for an annotation onto the specified GC at the given text range.
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Method Details
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draw
Draws a decoration for an annotation onto the specified GC at the given text range. There are two different invocation modes of thedraw
method:- drawing mode: the passed GC is the graphics context of a paint event occurring on the text widget. The strategy should draw the decoration onto the graphics context, such that the decoration appears at the given range in the text widget.
- clearing mode: the passed GC is
null
. In this case the strategy must invalidate enough of the text widget's client area to cover any decoration drawn in drawing mode. This can usually be accomplished by calling textWidget.redrawRange(offset, length, true).
- Parameters:
annotation
- the annotation to be drawngc
- the graphics context,null
when in clearing modetextWidget
- the text widget to draw onoffset
- the offset of the linelength
- the length of the linecolor
- the color of the line
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