When there isn't enough room to display all the crumbs, collapse from the left.

src/libtomahawk/widgets/breadcrumbbar.cpp

@@ -26,6 +26,8 @@
 #include <QItemSelectionModel>
 #include <QLabel>
 #include <QPropertyAnimation>
+#include <QResizeEvent>
+#include <QPushButton>
 
 #include "utils/logger.h"
 
@@ -198,12 +200,30 @@ void BreadcrumbBar::updateButtons()
     }
     m_navButtons.erase(itBegin, m_navButtons.end());
 
-    foreach (BreadcrumbButtonBase *button, m_navButtons)
-        button->show();
+    collapseButtons();
 
     adjustSize();
 }
 
+void BreadcrumbBar::collapseButtons()
+{
+    foreach (BreadcrumbButtonBase *button, m_navButtons) {
+        button->show();
+    }
+
+    const int desired_width = size().width();
+    int current_width = sizeHint().width();
+
+    QLinkedList<BreadcrumbButtonBase*>::iterator it = m_navButtons.begin();
+    QLinkedList<BreadcrumbButtonBase*>::const_iterator const itEnd = m_navButtons.end();
+    it = m_navButtons.begin();
+    while( current_width > desired_width && it != itEnd ) {
+        (*it)->hide();
+        ++it;
+        current_width = sizeHint().width();
+    }
+}
+
 void BreadcrumbBar::clearButtons()
 {
     foreach (BreadcrumbButtonBase *button, m_navButtons)
@@ -287,3 +307,7 @@ void BreadcrumbBar::currentChangedTriggered(QModelIndex const& index)
     m_selectionModel->setCurrentIndex( index, QItemSelectionModel::SelectCurrent);
 }
 
+void BreadcrumbBar::resizeEvent ( QResizeEvent * event )
+{
+    collapseButtons();
+}

src/libtomahawk/widgets/breadcrumbbar.h

@@ -34,6 +34,7 @@ class QAbstractItemModel;
 class QAbstractProxyModel;
 class QHBoxLayout;
 class QItemSelectionModel;
+class QResizeEvent;
 
 /**
  * \brief A breadcrumb view for a QAbstractItemModel
@@ -144,6 +145,17 @@ protected:
      */
     void deleteButton(BreadcrumbButtonBase *button);
 
+    /**
+     * \brief collapses crumbs when there isnt enough room for all of them
+     * Starts hiding from the left until we can fit all the buttons.
+     */
+    void collapseButtons();
+    /**
+     * \brief reimpl from QWidget
+     */
+    void resizeEvent ( QResizeEvent * event );
+
+
 protected slots:
 
     /**