Cooperate with Look & Feel better

[sandialabs]

Cooperate with Look & Feel better

[frothga]

• Fixed equation tree to update font. A related issue is that the size of cells depends on font size. The sequencing of actions during updateUI() can cause the cell size to not match the new font size. Fixed that for equation tree as well. There appears to be a similar problem with references, but don't have time to hunt it down now.
• The Look & Feel tab itself does not start up with the chosen font size (when different than 1). However, it does change font size correctly.
• To address the color issue, it may be necessary to define foreground colors specific to each L&F. Blue, Black and Red only work well for L&Fs which use light colors. Maybe define a dark background version and a light background version, and switch between them based on the current background color.

[frothga]

Fixed most issues with L&F. However, one outstanding problems is that the highlight color in equation trees and graph node titles is not updated correctly. This is particularly noticeable in Nimbus, where the lack of a proper highlight beneath a white title makes it invisible.

[frothga]

Nimbus seems to be the only remaining problem. Highlighting actually works correctly when switching between all other available L&Fs. However, after switching to Nimbus, the highlight remains screwed up when changing between other L&Fs.

[frothga]

Nimbus sets Tree.rendererFillBackground to false, effectively disabling the highlight in DefaultTreeCellRenderer. (Probably Nimbus paints the highlight in the TreeUI itself.) This explains the disappearing highlight, but not why the highlight remains screwed up after switching away from Nimbus.

[frothga]

Added a fix to use Nimbus' background painter when it is present and the cell is not in a tree.

Also fixed the lingering highlight problem. The issue was that DefaultTreeCellRenderer would not update the color if it was not currently a UIResource.