More mouse and PIC fixes and the mouse now takes of the ration between guest resolution and actual render area size, multiplied by the DPI, when returning coordinate deltas, also unified the delta return function across the various emulated mice.

src/qt/qt_renderercommon.hpp

@@ -38,8 +38,10 @@ public:
     virtual bool hasBlitFunc() { return false; }
     virtual void blit(int x, int y, int w, int h) { }
 
+    int      r_monitor_index = 0;
+
 protected:
-    bool eventDelegate(QEvent *event, bool &result);
+    bool     eventDelegate(QEvent *event, bool &result);
 
     QRect    source { 0, 0, 0, 0 };
     QRect    destination;