improve moving of layers

GUI/View/SampleDesigner/WidgetMoverButton.cpp

@@ -48,6 +48,9 @@ void WidgetMoverButton::mousePressEvent(QMouseEvent* event)
 
 void WidgetMoverButton::mouseReleaseEvent(QMouseEvent*)
 {
+    qDeleteAll(m_animations.values());
+    m_animations.clear();
+
     m_dragScrollTimer.stop();
     m_started = false;
     if (m_layoutToDeactivate != nullptr) {
@@ -107,14 +110,22 @@ void WidgetMoverButton::mouseMoveEvent(QMouseEvent* event)
                 QWidget* w = layoutItem->widget();
                 if (w == nullptr) {
                     layoutItem->setGeometry(r);
-                } else {
-                    QPropertyAnimation* animation = new QPropertyAnimation(w, "geometry");
+                } else if (!m_animations.contains(w)) {
+                    auto animation = new QPropertyAnimation(w, "geometry");
                     animation->setDuration(100);
                     animation->setEasingCurve(QEasingCurve::OutQuad);
                     animation->setStartValue(w->geometry());
                     animation->setEndValue(r);
-
                     animation->start();
+                    m_animations[w] = animation;
+                } else {
+                    auto animation = m_animations[w];
+                    if (animation->endValue() != r) {
+                        animation->stop();
+                        animation->setStartValue(w->geometry());
+                        animation->setEndValue(r);
+                        animation->start();
+                    }
                 }
             }
 

GUI/View/SampleDesigner/WidgetMoverButton.h

@@ -15,10 +15,12 @@
 #ifndef BORNAGAIN_GUI_VIEW_SAMPLEDESIGNER_WIDGETMOVERBUTTON_H
 #define BORNAGAIN_GUI_VIEW_SAMPLEDESIGNER_WIDGETMOVERBUTTON_H
 
+#include <QMap>
 #include <QTimer>
 #include <QToolButton>
 
 class QScrollArea;
+class QPropertyAnimation;
 
 //! Button to move a widget vertically in a layout.
 //!
@@ -65,6 +67,7 @@ private:
     QTimer m_dragScrollTimer;
     QScrollArea* m_scrollArea;
     QPoint m_hotSpot; //!< The mouse-down coordinates in the widget to move
+    QMap<QWidget*, QPropertyAnimation*> m_animations;
 };