Move signallabel code out from its header

src/widgets/helper/signallabel.cpp

@@ -0,0 +1,34 @@
+#include "widgets/helper/signallabel.hpp"
+
+SignalLabel::SignalLabel(QWidget *parent, Qt::WindowFlags f)
+    : QLabel(parent, f)
+{
+}
+
+void SignalLabel::mouseDoubleClickEvent(QMouseEvent *ev)
+{
+    emit this->mouseDoubleClick(ev);
+}
+
+void SignalLabel::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        emit mouseDown();
+    }
+
+    event->ignore();
+}
+
+void SignalLabel::mouseReleaseEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        emit mouseUp();
+    }
+
+    event->ignore();
+}
+
+void SignalLabel::mouseMoveEvent(QMouseEvent *event)
+{
+    event->ignore();
+}