void 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. There are two different invocation modes of the
- 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).
annotation- the annotation to be drawn
gc- the graphics context,
nullwhen in clearing mode
textWidget- the text widget to draw on
offset- the offset of the line
length- the length of the line
color- the color of the line