Double click in file tree open file

filesystemwidget.cpp

@@ -122,3 +122,13 @@ void Filetree::contextMenuEvent(QContextMenuEvent *event)
         emit indexDirectory(m_fileSystemModel->filePath(index));
     }
 }
+
+void Filetree::mouseDoubleClickEvent(QMouseEvent *event)
+{
+    QModelIndex index = indexAt(event->pos());
+    QFileInfo info = m_fileSystemModel->fileInfo(index);
+    if(info.isFile())
+        emit fileSelected(info.filePath());
+    else
+        QTreeView::mouseDoubleClickEvent(event);
+}

filesystemwidget.h

@@ -30,6 +30,7 @@ public:
     explicit Filetree(QWidget *parent = nullptr);
     ~Filetree();
     void contextMenuEvent(QContextMenuEvent *event);
+    void mouseDoubleClickEvent(QMouseEvent *event);
 signals:
     void fileSelected(const QString &path);
     void copyFiles(const QString &path);