Color legend misleading when not mapping scalars
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When you draw data with unsigned char vectors, ParaView by default treats those as color vectors and draws them directly as colors rather than sending them through a color map (which can be toggled with the "Map Scalars" display option).
That behavior is correct, but when that is happening, the user can still click the Color Legend and Edit Colors toolbar buttons to display the scalar bar and edit the colors in it. This is misleading as those colors are meaningless for the current rendering of the data. When viewing data with the "Map Scalars" option on, these two toolbar buttons should be grayed out. If Map Scalars is turned off and the color bar is visible, it should be implicitly made invisible.
To replicate, load in the Arrow.png baseline image in the ParaViewData directory, apply, then turn on the color map. Misleading as those colors have nothing to do with those shown.