koolish@bbn.com (Dick Koolish) (06/13/90)
A question about the cursor color... XRecolorCursor takes two XColor structures, one for foreground and one for background colors. The structures specify the color number and the RGB values. I have an application that uses three color maps that share some colors, and I want the cursor to be one of the shared colors so it won't change color when I change colormaps. Whatever I do, it seems like the cursor is always using colors 0 and 1 regardless of what XRecolor Cursor says. In looking through the sources, I found the _Cursor structure in src/server/include/cursorstr.h. It holds the RGB values for foreground and background but doesn't seem to have the color number in there. Does this mean that the color number is ignored?
rws@EXPO.LCS.MIT.EDU (Bob Scheifler) (06/13/90)
In looking through the sources, I found the _Cursor structure in
src/server/include/cursorstr.h.
You would have been better off looking at the RecolorCursor request
definition in the X Protocol specification.
Does this mean that the color number is ignored?
Yes. Xlib uses XColor structures here because it was more "convenient"
than defining another structure.stroyan@hpfcso.HP.COM (Mike Stroyan) (06/14/90)
> XRecolorCursor takes two XColor structures, one for foreground > and one for background colors. The structures specify the color > number and the RGB values. I have an application that uses three > color maps that share some colors, and I want the cursor to be one > of the shared colors so it won't change color when I change colormaps. The cursor may not be displayed in the colormap of the current colormap focus window. Some servers have separate hardware cursors that use a different colormap. Given this possibility it is wise that the cursor colors are set in RGB values. If a server draws a cursor in the frame buffer it should recompute the cursor indices to match the requested RGB values whenever it installs a new colormap. If the X server doesn't update the cursor to match the colormap, then there isn't much that a client can do about it. Mike Stroyan