Mouse when moving picture out of imageview doesn't wraps like in KDE4. This is very useful.

Reproducible: Always

Steps to Reproduce:
Move the image by mouse out of image view.

Actual Results:  
Mouse doesn't wrap.

Expected Results:  
Mouse wraps like in KDE4.

Patch tested on Arch Linux, Qt 5.4.2:

--- abstractimageview.cpp.orig  2015-06-03 16:00:49.241659454 +0200
+++ abstractimageview.cpp       2015-06-03 16:00:55.708326391 +0200
@@ -306,7 +306,6 @@
     QPointF mousePos = event->pos();
     QPointF newScrollPos = d->mScrollPos + d->mLastDragPos - mousePos;
 
-#if 0 // commented out due to mouse pointer warping around, bug in Qt?
     // Wrap mouse pos
     qreal maxWidth = boundingRect().width();
     qreal maxHeight = boundingRect().height();
@@ -315,22 +314,28 @@
     // The mouse get placed 1 pixel before/after the margin to avoid getting
     // considered as needing to wrap the other way in next mouseMoveEvent
     // (because we don't check the move vector)
+    bool setCursorPos = false;
     const int margin = 5;
     if (mousePos.x() <= margin) {
         mousePos.setX(maxWidth - margin - 1);
+        setCursorPos = true;
     } else if (mousePos.x() >= maxWidth - margin) {
         mousePos.setX(margin + 1);
+        setCursorPos = true;
     }
     if (mousePos.y() <= margin) {
         mousePos.setY(maxHeight - margin - 1);
+        setCursorPos = true;
     } else if (mousePos.y() >= maxHeight - margin) {
         mousePos.setY(margin + 1);
+        setCursorPos = true;
     }
 
-    // Set mouse pos (Hackish translation to screen coords!)
-    QPointF screenDelta = event->screenPos() - event->pos();
-    QCursor::setPos((mousePos + screenDelta).toPoint());
-#endif
+    if (setCursorPos) {
+        // Set mouse pos (Hackish translation to screen coords!)
+        QPointF screenDelta = event->screenPos() - event->pos();
+        QCursor::setPos((mousePos + screenDelta).toPoint());
+    }
 
     d->mLastDragPos = mousePos;
     d->setScrollPos(newScrollPos);