digiKam from KDE3 : Adjust Curves usuability improvements : port first image plugin to new Editor Tool API.

The tool is now embedded in editor window.
There is no external dialog to show for this tool. Tool settings is placed on editor right sidebar and tool preview in editor canvas stack.

The look of editor sound like more professional application (as Aperture, LightZone, or LightRoom).
Look the screenshot:
<a href="/issues/2008-08-24/files/2785923199_a87e6b017d_o.png">http://farm4.static.flickr.com/3199/2785923199_a87e6b017d_o.png</a>;