Add ability to move result widget with middle button

src/represent/resultwidget.cpp

@@ -150,19 +150,35 @@ void ResultWidget::updateSettings()
 
 bool ResultWidget::eventFilter(QObject *watched, QEvent *event)
 {
-  if (event->type() == QEvent::MouseButtonPress) {
+  if (event->type() == QEvent::WindowDeactivate)
-    const auto button = static_cast<QMouseEvent *>(event)->button();
-    if (button == Qt::RightButton) {
-      contextMenu_->exec(QCursor::pos());
-    } else {
-      hide();
-    }
-  } else if (event->type() == QEvent::WindowDeactivate) {
     hide();
-  }
   return QWidget::eventFilter(watched, event);
 }
 
+void ResultWidget::mousePressEvent(QMouseEvent *event)
+{
+  const auto button = event->button();
+  if (button == Qt::RightButton) {
+    contextMenu_->exec(QCursor::pos());
+    return;
+  }
+
+  if (button == Qt::MiddleButton) {
+    lastPos_ = event->pos();
+    return;
+  }
+
+  hide();
+}
+
+void ResultWidget::mouseMoveEvent(QMouseEvent *event)
+{
+  if (!(event->buttons() & Qt::MiddleButton))
+    return;
+
+  move(pos() + event->pos() - lastPos_);
+}
+
 void ResultWidget::edit()
 {
   representer_.edit(task_);

src/represent/resultwidget.h

@@ -21,6 +21,10 @@ public:
 
   bool eventFilter(QObject* watched, QEvent* event) override;
 
+protected:
+  void mousePressEvent(QMouseEvent* event) override;
+  void mouseMoveEvent(QMouseEvent* event) override;
+
 private:
   void edit();
   void copyImage();
@@ -34,4 +38,5 @@ private:
   QLabel* separator_;
   QLabel* translated_;
   QMenu* contextMenu_;
+  QPoint lastPos_;
 };