Navigation Tree View: Fix width of column

We want to have the width both to be at least the contents size
but also stretch to width of the viewport.

Reviewed-By: con

src/libs/utils/navigationtreeview.cpp

@@ -61,8 +61,8 @@ NavigationTreeView::NavigationTreeView(QWidget *parent)
     setAttribute(Qt::WA_MacShowFocusRect, false);
 
     setHeaderHidden(true);
-
-    // show horizontal scrollbar
+    // We let the column adjust to contents, but note
+    // the setting of a minimum size in resizeEvent()
     header()->setResizeMode(QHeaderView::ResizeToContents);
     header()->setStretchLastSection(false);
 }
@@ -82,6 +82,12 @@ void NavigationTreeView::focusOutEvent(QFocusEvent *event)
         QTreeView::focusOutEvent(event);
 }
 
+void NavigationTreeView::resizeEvent(QResizeEvent *event)
+{
+    header()->setMinimumSectionSize(viewport()->width());
+    QTreeView::resizeEvent(event);
+}
+
 #ifdef Q_WS_MAC
 void NavigationTreeView::keyPressEvent(QKeyEvent *event)
 {

src/libs/utils/navigationtreeview.h

@@ -49,6 +49,7 @@ public:
 protected:
     void focusInEvent(QFocusEvent *event);
     void focusOutEvent(QFocusEvent *event);
+    void resizeEvent(QResizeEvent *event);
 
 #ifdef Q_WS_MAC
     void keyPressEvent(QKeyEvent *event);

src/plugins/classview/classviewnavigationwidget.cpp

@@ -83,7 +83,6 @@ NavigationWidget::NavigationWidget(QWidget *parent) :
 
     // tree model
     d_ptr->treeModel = new TreeItemModel(this);
-    d_ptr->ui->treeView->header()->setStretchLastSection(true);
     d_ptr->ui->treeView->setModel(d_ptr->treeModel);
 
     // connect signal/slots

src/plugins/projectexplorer/projecttreewidget.cpp

@@ -116,7 +116,6 @@ ProjectTreeWidget::ProjectTreeWidget(QWidget *parent)
             this, SLOT(filesAboutToBeRemoved(FolderNode *, const QList<FileNode*> &)));
 
     m_view = new ProjectTreeView;
-    m_view->header()->setStretchLastSection(true);
     m_view->setModel(m_model);
     setFocusProxy(m_view);
     initView();