Improve stretching (RELATIVE) toolbar items

The available space is distributed reg. the preferred width
of items (spacers and the iconbar ;-) instead of evenly.

The preferred width of the iconbar is calculated from its buttons.

This allows to align the iconbar using spacers and makes better use of
the available space

1 files changed, 1 insertions, 0 deletions

diff --git a/src/IconbarTool.hh b/src/IconbarTool.hh
index 118eacf..1680f5c 100644
--- a/src/IconbarTool.hh
+++ b/src/IconbarTool.hh
@@ -60,6 +60,7 @@ public:
     void parentMoved() { m_icon_container.parentMoved(); }
 
     unsigned int width() const;
+    unsigned int preferredWidth() const;
     unsigned int height() const;
     unsigned int borderWidth() const;