[cp-patches] Patch: BasicTreeUI painting fix

[Lillian Angel]

Roman noticed that JTree painting was rather inefficent with big trees.
This was due to the recursion. I fixed this to only paint the rows
contained in the clip, using a loop.

Also,  I did a bit of cleaning up in the class.

2005-11-15  Lillian Angel  <address@hidden>

        * javax/swing/plaf/basic/BasicTreeUI.java:
        Removed unneeded field.
        (getPathBounds): Reimplemented to use getNodeDimensions.
        (getRowCount): Removed call to updateCurrentVisiblePath.
        (uninstallKeyboardActions): Implemented.
        (paint): Reimplemented to only paint rows contained in clip.
        No longer uses recursion.
        (mousePressed): If control icon is clicked, should scroll to 
        that path.
        (getNodeDimensions): Implemented.
        (getRowX): Implemented.
        (getCellBounds): Removed.
        (getCellLocation): Removed.
        (paintRecursive): Removed.
        (paintControlIcons): Removed.
        (getPreviousVisibleNode): Removed call to 
        updateCurrentVisiblePath.
        (getLevel): Added check for invisible root.
        (paintVerticalLine): Set graphics color.
        (paintHorizontalLine): Likewise.
        (drawCentered): Added negative check.
        (drawDashedHorizontalLine): Set graphics color.
        (drawDashedVerticalLine): Likewise.
        (paintExpandControl): Implemented.
        (paintHorizontalPartOfLeg): Likewise.
        (paintVerticalPartOfLeg): Likewise.
        (paintRow): Added call to paint the control icons.
        (updateCurrentVisiblePath): Cleaned up function.

patch.diff
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