Version: (using KDE 4.1.3) Installed from: SuSE RPMs The widget gets stretched over all the available space in the panel. It overlaps the properties button of the panel as well.
Created attachment 30631 [details] screen shot
Cannot reproduce on current trunk (r954149). Probably it has been fixed.
Here using: Qt: 4.5.0 + qt-copy-patches-942255 KDE: 4.2.70 (KDE 4.2.70 (KDE 4.3 >= 20090415)) kdelibs svn rev. 958964 / kdebase svn rev. 958965 on ArchLinux i686 - Kernel 2.6.29.1 I can reproduce this, the Color picker widget takes all the space available on a horizontal or vertical panel.
@Dario: probably I've missed the "in the panel" part :-) Anyway, today Aaron fixed the same problem on system tray. Colorpicker and probably even other plasmoids suffer of the same bug.
SVN commit 961642 by mart: transparently add and remove a spacer in the panel when an applet with expanding sizepolicy is added-removed, this should avoid horrendously stretched applets BUG: 181999 M +61 -2 containments/panel/panel.cpp M +4 -0 containments/panel/panel.h M +9 -4 shells/desktop/panelappletoverlay.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=961642