* app/image_map.[ch]: new function image_map_clear that removes
the preview without freeing the image_map.
* app/brightness_contrast.c
* app/color_balance.c
* app/curves.c
* app/hue_saturation.c
* app/levels.c
* app/posterize.c
* app/threshold.c: Add a call to image_map_clear in the
preview toggle button callback. This makes the preview toggle
button behave as expected.
* app/histogram_tool: remove an unnecessary include.
Wed Apr 7 22:44:02 BST 1999 Andy Thomas <alt@gimp.org>
Changed:-
* app/curves.c
* app/image_map.c
* app/image_map.h
Curves dialog now has "interactive feedback". Press and drag the
mouse button in the image window and a marker will appear in the
curves dialog showing the channel value at that point.