mobile/debug: simulate zooming through mouse wheel on desktop

And allow touchpad gestures to be recognized as well. This has no
negative impact on the mobile platforms, but makes it much easier to
test profile scaling / panning on the desktop.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qml/DiveDetailsView.qml

@@ -277,6 +277,16 @@ Item {
 						// pass events through to the parent and eventually into the ListView
 						propagateComposedEvents: true
 
+						// for testing / debugging on a desktop
+						scrollGestureEnabled: true
+						onWheel: {
+							manager.appendTextToLog("wheel " + wheel.angleDelta)
+							if (wheel.angleDelta.y > 0)
+								qmlProfile.scale += 0.2
+							if (wheel.angleDelta.y < 0 && qmlProfile.scale > 1.1)
+								qmlProfile.scale -= 0.2
+						}
+
 						anchors.fill: parent
 						drag.target: qmlProfile
 						drag.axis: Drag.XAndYAxis