Sessions: Make manager usable again... for Linux

With the change that the activated signal switches to the current
session the manager becomes unusable e.g. in Linux/KDE with a single
click policy. This is because you can't select a session by mouse any
more in order to use one of the delete/rename/etc buttons.

Change-Id: I4e81ee21f37fba0b4f456e02e9ce2e9da14c5a88
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/projectexplorer/sessiondialog.cpp

@@ -121,6 +121,7 @@ bool SessionNameInputDialog::isSwitchToRequested() const
 SessionDialog::SessionDialog(QWidget *parent) : QDialog(parent)
 {
     m_ui.setupUi(this);
+    m_ui.sessionView->setActivationMode(Utils::DoubleClickActivation);
 
     connect(m_ui.btCreateNew, &QAbstractButton::clicked,
         m_ui.sessionView, &SessionView::createNewSession);

src/plugins/projectexplorer/sessionview.cpp

@@ -53,7 +53,7 @@ void RemoveItemFocusDelegate::paint(QPainter* painter, const QStyleOptionViewIte
 }
 
 SessionView::SessionView(QWidget *parent)
-    : QTreeView(parent)
+    : Utils::TreeView(parent)
 {
     setItemDelegate(new RemoveItemFocusDelegate(this));
     setSelectionBehavior(QAbstractItemView::SelectRows);
@@ -68,7 +68,7 @@ SessionView::SessionView(QWidget *parent)
     selectionModel()->select(firstRow, QItemSelectionModel::QItemSelectionModel::
         SelectCurrent);
 
-    connect(this, &QTreeView::activated, [this](const QModelIndex &index){
+    connect(this, &Utils::TreeView::activated, [this](const QModelIndex &index){
         emit activated(m_sessionModel.sessionAt(index.row()));
     });
     connect(selectionModel(), &QItemSelectionModel::currentRowChanged, [this]
@@ -133,7 +133,7 @@ void SessionView::selectSession(const QString &sessionName)
 
 void SessionView::showEvent(QShowEvent *event)
 {
-    QTreeView::showEvent(event);
+    Utils::TreeView::showEvent(event);
     selectActiveSession();
     setFocus();
 }

src/plugins/projectexplorer/sessionview.h

@@ -27,13 +27,14 @@
 
 #include "sessionmodel.h"
 
+#include <utils/itemviews.h>
+
 #include <QAbstractTableModel>
-#include <QTreeView>
 
 namespace ProjectExplorer {
 namespace Internal {
 
-class SessionView : public QTreeView {
+class SessionView : public Utils::TreeView {
     Q_OBJECT
 
 public: