added settings

widgets/signallabel.h

@@ -3,21 +3,48 @@
 
 #include <QFlags>
 #include <QLabel>
+#include <QMouseEvent>
 #include <QWidget>
 
 class SignalLabel : public QLabel
 {
     Q_OBJECT
+
 public:
     explicit SignalLabel(QWidget *parent = 0, Qt::WindowFlags f = 0)
-        : QLabel(parent, f) {}
+        : QLabel(parent, f)
+    {
+    }
     virtual ~SignalLabel() = default;
+
 signals:
     void mouseDoubleClick(QMouseEvent *ev);
+
+    void mouseDown();
+    void mouseUp();
+
 protected:
-    virtual void mouseDoubleClickEvent(QMouseEvent *ev) override {
+    virtual void
+    mouseDoubleClickEvent(QMouseEvent *ev) override
+    {
         emit this->mouseDoubleClick(ev);
     }
+
+    virtual void
+    mousePressEvent(QMouseEvent *event) override
+    {
+        if (event->button() == Qt::LeftButton) {
+            emit mouseDown();
+        }
+    }
+
+    void
+    mouseReleaseEvent(QMouseEvent *event) override
+    {
+        if (event->button() == Qt::LeftButton) {
+            emit mouseUp();
+        }
+    }
 };
 
-#endif // SIGNALLABEL_H
+#endif  // SIGNALLABEL_H