Undo'ing causes gradient editor to display junk in preview

[Colin1000]

Version: Inkscape 0.46dev+devel, built Sep 20 2007
         for Win32

If you create a gradient and then open the gradient editor to edit it, and
then "undo" to before the gradient existed, the gradient preview in the
gradient editor dialog box displays a junk image.

Steps to reproduce:

1. Open a new document.
2. Draw a shape like a square
3. Go to Fill/Stroke
4. Select either gradient option for fill
5. Click on "Edit" to edit the gradient.
   The Gradient Editor dialog will open.
   A preview of the new gradient is shown along the top
   of the window.
6. Click back in the main window and hit Ctrl-Z to undo.
7. The preview of the gradient will turn into something
   that looks like static.

I understand why the program is doing this - it can't show a preview of a
gradient that no longer exists. I'm more reporting this because it looks
bad and in case it is a bug that leads to the program becoming unstable. It
doesn't seem to do so, but as it redisplays the gradient after the undo and
it seems to be reading junk, I would assume (and I don't know) that the
memory allocated for the gradient gets freed but the preview is still
reading from it. If this is the case then it could break things later, so I
thought I'd report it.

Otherwise I love inkscape. Thank you so much for all of this work.

Colin

[John Cliff (johncliff)]

confirmed in SVN. I know the plan is to kill the dialog, but since that hasnt happened yet this ones still valid.

[jazzynico (jazzynico)]

Reproduced on WIndows XP, Inkscape bzr rev. 9222.

[jazzynico (jazzynico)]

Fixed in the trunk with the new gradient tool.