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PenPointRecorder
category: Graphics-Primitives
superclass: Pen
subclasses:
This class is a special kind of Pen that instead of actually drawing lines records the destination points for those lines. These points can later be accessed through my accessing method #points.
This can be useful when determining the boundaries of a drawing session.
Example:
| pen |
pen _ PenPointRecorder new.
pen up; goto: 100@100; down; goto: 120@120.
Transcript cr;
show: 'Bounding box for drawing: ';
show: (Rectangle encompassing: pen points)
Implementation note: Shouldn't we override #drawFrom:to:withFirstPoint: instead, and what about #drawLoopX:Y:? Aren't we missing those calls?
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