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Re: 256 color mode and ximtool
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Re: 256 color mode and ximtool


  • Subject: Re: 256 color mode and ximtool
  • From: Jeremy Huddleston <email@hidden>
  • Date: Wed, 17 Sep 2008 09:16:02 -0700

First, are you using 256 color mode option? Check X11->Preferences- >Output? 8bit visuals in TrueColor mode don't work right yet (there are some problems with the color maps that I haven't traced down yet, so the colors will be off).

Did this "color to grey" work in X11 on Tiger? I don't think we supported an 8bit grayscale visual. Or is it actually using PseudoColor 8bit grey colormap?

Is your problem that the switch is happening "on click" rather than "on mouse over"? If so, I come back to wondering if this worked on Tiger or not. The window should be getting notifications of mouse entering or leaving just like any other X11 application does.

On Sep 17, 2008, at 05:18, Bruce Truax wrote:

I just tried ximtool with the new 256 color mode and it does not work
properly. Ximtool is a display tool for astronomy which operates only in
256 color mode. Normally when you put your mouse within the window the
color map gets switched to 256 greys, when you go out of the window the
colors get remapped to the color mode used by the active window. With the
latest release of X11 the color map will not switch when you activate the
ximtool window. It will switch if you use the mouse to draw a cursor on the
image, then the redrawn area within the cursor will have the correct color
map. But it will not automatically switch when the mouse enters the window.


There is another feature of ximtool which also does not work and is probably
related. When the cursor is within the image area and you press on the
right mouse button and move the mouse the color map is supposed to update in
real time changing the greyscale mapping (it adjusts the contrast and
display range). The right mouse button does get sent to the program because
other right mouse button functions work as expected but the remapping of the
colors does not function.


Jeremy, I apologize for not testing this during the rc phase but I was using
X11 for some critical work and I did not want to take the chance of breaking
anything. This is not a critical issue for me because I have migrated to
ds9 for most display tasks but I would like to see ximtool work once again
if possible (it has not worked since the old tiger 256 color mode was
nixed).




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