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/ToolbarItem.hh b/src/ToolbarItem.hh
index bd5b38f..8759b83 100644
--- a/src/ToolbarItem.hh
+++ b/src/ToolbarItem.hh
@@ -47,6 +47,7 @@ public:
     virtual void show() = 0;
     virtual void hide() = 0;
     virtual unsigned int width() const = 0;
+    virtual unsigned int preferredWidth() const { return width(); }
     virtual unsigned int height() const = 0;
     virtual unsigned int borderWidth() const = 0;
     // some items might be there, but effectively empty, so shouldn't appear