[PIVOT-66] Optimize Viewport by only painting the revealed area

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.1
• Fix Version/s: 1.2
• Component/s: wtk
• Assignee: Todd Volkert
• Reporter: Todd Volkert
• Created: 09/Apr/09 18:26
• Updated: 02/May/13 02:29
• Resolved: 20/Apr/09 19:14

Description

We can cache the paint results of a Viewport in a BufferedImage and re-use that image when the scroll top or scroll left changes, thus enabling us to clip the paint region to just the bounds that were revealed by the scroll change.

Issue Links

• depends upon: PIVOT-105 Create Component.getGraphics()