Move the mouse handling from Separator to SeparatorWidget

As it's QWidget specific

src/private/multisplitter/Separator.cpp

@@ -24,8 +24,7 @@
 #include "Item_p.h"
 #include "Config.h"
 
-#include <QMouseEvent>
-#include <QApplication>
+#include <QGuiApplication>
 
 #ifdef Q_OS_WIN
 # include <windows.h>
@@ -85,7 +84,7 @@ Qt::Orientation Separator::orientation() const
     return d->orientation;
 }
 
-void Separator::mousePressEvent(QMouseEvent *)
+void Separator::onMousePress()
 {
     s_separatorBeingDragged = this;
 
@@ -97,7 +96,14 @@ void Separator::mousePressEvent(QMouseEvent *)
     }
 }
 
-void Separator::mouseMoveEvent(QMouseEvent *ev)
+void Separator::onMouseDoubleClick()
+{
+    // a double click means we'll resize the left and right neighbour so that they occupy
+    // the same size (or top/bottom, depending on orientation).
+    d->parentContainer->requestEqualSize(this);
+}
+
+void Separator::onMouseMove(QPoint pos)
 {
     if (!isBeingDragged())
         return;
@@ -118,7 +124,7 @@ void Separator::mouseMoveEvent(QMouseEvent *ev)
     }
 #endif
 
-    const int positionToGoTo = Layouting::pos(mapToParent(ev->pos()), d->orientation);
+    const int positionToGoTo = Layouting::pos(mapToParent(pos), d->orientation);
     const int minPos = d->parentContainer->minPosForSeparator_global(this);
     const int maxPos = d->parentContainer->maxPosForSeparator_global(this);
 
@@ -135,18 +141,6 @@ void Separator::mouseMoveEvent(QMouseEvent *ev)
         d->parentContainer->requestSeparatorMove(this, positionToGoTo - position());
 }
 
-void Separator::mouseReleaseEvent(QMouseEvent *)
-{
-    onMouseReleased();
-}
-
-void Separator::mouseDoubleClickEvent(QMouseEvent *)
-{
-    // a double click means we'll resize the left and right neighbour so that they occupy
-    // the same size (or top/bottom, depending on orientation).
-    d->parentContainer->requestEqualSize(this);
-}
-
 void Separator::onMouseReleased()
 {
     if (d->lazyResizeRubberBand) {

src/private/multisplitter/Separator_p.h

@@ -58,15 +58,14 @@ public:
 
 protected:
     explicit Separator(Widget *hostWidget);
-    void mousePressEvent(QMouseEvent *) override;
-    void mouseMoveEvent(QMouseEvent *) override;
-    void mouseReleaseEvent(QMouseEvent *) override;
-    void mouseDoubleClickEvent(QMouseEvent *) override;
     virtual Widget* createRubberBand(Widget *parent) { Q_UNUSED(parent); return nullptr; }
+    void onMousePress();
+    void onMouseReleased();
+    void onMouseDoubleClick();
+    void onMouseMove(QPoint pos);
 private:
     friend class Config;
 
-    void onMouseReleased();
     void setLazyPosition(int);
     bool isBeingDragged() const;
     bool usesLazyResize() const;

src/private/widgets/SeparatorWidget.cpp

@@ -25,6 +25,7 @@
 #include <QPainter>
 #include <QStyleOption>
 #include <QRubberBand>
+#include <QMouseEvent>
 
 using namespace KDDockWidgets;
 
@@ -65,6 +66,26 @@ void SeparatorWidget::leaveEvent(QEvent *)
     setCursor(Qt::ArrowCursor);
 }
 
+void SeparatorWidget::mousePressEvent(QMouseEvent *)
+{
+    onMousePress();
+}
+
+void SeparatorWidget::mouseMoveEvent(QMouseEvent *ev)
+{
+    onMouseMove(ev->pos());
+}
+
+void SeparatorWidget::mouseReleaseEvent(QMouseEvent *)
+{
+    onMouseReleased();
+}
+
+void SeparatorWidget::mouseDoubleClickEvent(QMouseEvent *)
+{
+    onMouseDoubleClick();
+}
+
 Layouting::Widget *SeparatorWidget::createRubberBand(Layouting::Widget *parent)
 {
     if (!parent) {

src/private/widgets/SeparatorWidget_p.h

@@ -40,6 +40,10 @@ protected:
     void paintEvent(QPaintEvent *) override;
     void enterEvent(QEvent *) override;
     void leaveEvent(QEvent *) override;
+    void mousePressEvent(QMouseEvent *) override;
+    void mouseMoveEvent(QMouseEvent *) override;
+    void mouseReleaseEvent(QMouseEvent *) override;
+    void mouseDoubleClickEvent(QMouseEvent *) override;
     Layouting::Widget* createRubberBand(Layouting::Widget *parent) override;
 };