Slider: fix behavior inside a flickable on touch

Do not move the handle immediately on press, but delay it until the
drag is over the threshold. This makes Slider behave inside a flickable
in a sensible way ie. the handle is not prematurely moved when flicking

Change-Id: Ie02762717156e75be9db757330a95a3f50451f1a
Reviewed-by: Caroline Chao <caroline.chao@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/src/controls/Slider.qml b/src/controls/Slider.qml
index ffea986c..0f7fc033 100644
--- a/src/controls/Slider.qml
+++ b/src/controls/Slider.qml
@@ -229,18 +229,22 @@ Control {
         onMouseXChanged: {
             if (pressed && __horizontal) {
                 var pos = clamp (mouse.x + clickOffset - fakeHandle.width/2)
-                fakeHandle.x = pos
-                if (Math.abs(mouse.x - pressX) >= Settings.dragThreshold)
+                var overThreshold = Math.abs(mouse.x - pressX) >= Settings.dragThreshold
+                if (overThreshold)
                     preventStealing = true
+                if (overThreshold || !Settings.hasTouchScreen)
+                    fakeHandle.x = pos
             }
         }
 
         onMouseYChanged: {
             if (pressed && !__horizontal) {
                 var pos = clamp (mouse.y + clickOffset- fakeHandle.height/2)
-                fakeHandle.y = pos
-                if (Math.abs(mouse.y - pressY) >= Settings.dragThreshold)
+                var overThreshold = Math.abs(mouse.y - pressY) >= Settings.dragThreshold
+                if (overThreshold)
                     preventStealing = true
+                if (overThreshold || !Settings.hasTouchScreen)
+                    fakeHandle.y = pos
             }
         }