Solve Doubleclick issue

deselectabletreeview.h

@@ -4,6 +4,7 @@
 #include "QMouseEvent"
 #include "QTreeView"
 #include "mainwindow.h"
+#include <QTime>
 
 /**
  * @brief The DeselectableTreeView class
@@ -31,22 +32,41 @@ class DeselectableTreeView : public QTreeView {
   void emptyClicked();
 
 private:
+  bool DoubleClickHappened;
+
   /**
-   * @brief mousePressEvent now deselects on second click
+   * @brief mouseReleaseEvent now deselects on click on empty space
    * @param event
    */
-  virtual void mousePressEvent(QMouseEvent *event) {
-    QModelIndex item = indexAt(event->pos());
-    bool selected = selectionModel()->isSelected(indexAt(event->pos()));
-    QTreeView::mousePressEvent(event);
-    if ((item.row() == -1 && item.column() == -1) || selected) {
-      clearSelection();
-      const QModelIndex index;
-      selectionModel()->setCurrentIndex(index, QItemSelectionModel::Select);
-      emit emptyClicked();
-      // QTreeView::mousePressEvent(event);
+  void mouseReleaseEvent(QMouseEvent *event) {
+    DoubleClickHappened = false;
+    // The timer is to distinguish between single and double click
+    QTime dieTime= QTime::currentTime().addMSecs(200);
+    while (QTime::currentTime() < dieTime)
+        QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
+    if (!DoubleClickHappened){
+      QModelIndex item = indexAt(event->pos());
+      bool selected = selectionModel()->isSelected(indexAt(event->pos()));
+      QTreeView::mouseReleaseEvent(event);
+      if ((item.row() == -1 && item.column() == -1) || selected) {
+        clearSelection();
+        const QModelIndex index;
+        selectionModel()->setCurrentIndex(index, QItemSelectionModel::Select);
+        emit emptyClicked();
+      }
     }
   }
+
+
+  /**
+   * @brief mouseDoubleClickEvent
+   * @param event
+   */
+  void mouseDoubleClickEvent(QMouseEvent *event){
+    DoubleClickHappened = true;
+    QTreeView::mouseDoubleClickEvent(event);
+  }
+
 };
 
 #endif // DESELECTABLETREEVIEW_H