QmlDesigner: Fix StatesEditor scroll bar

Change-Id: I241a33906d06c6011cb618b96c039dfe91323809
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

share/qtcreator/qmldesigner/newstateseditor/Main.qml

@@ -507,7 +507,6 @@ Rectangle {
                     x: scrollView.leftPadding
                     y: scrollView.height - height
                     width: scrollView.availableWidth
-                    active: scrollView.ScrollBar.vertical.active
                     orientation: Qt.Horizontal
                 }
 
@@ -516,20 +515,9 @@ Rectangle {
                     x: scrollView.mirrored ? 0 : scrollView.width - width
                     y: scrollView.topPadding
                     height: scrollView.availableHeight
-                    active: scrollView.ScrollBar.horizontal.active
                     orientation: Qt.Vertical
                 }
 
-                flickableDirection: {
-                    if (frame.contentHeight <= scrollView.height)
-                        return Flickable.HorizontalFlick
-
-                    if (frame.contentWidth <= scrollView.width)
-                        return Flickable.VerticalFlick
-
-                    return Flickable.HorizontalAndVerticalFlick
-                }
-
                 Flickable {
                     id: frame
                     boundsMovement: Flickable.StopAtBounds
@@ -543,6 +531,15 @@ Rectangle {
                         let ext = root.showExtendGroups ? (2 * root.extend) : 0
                         return innerGrid.height + ext
                     }
+                    flickableDirection: {
+                        if (frame.contentHeight <= scrollView.height)
+                            return Flickable.HorizontalFlick
+
+                        if (frame.contentWidth <= scrollView.width)
+                            return Flickable.VerticalFlick
+
+                        return Flickable.HorizontalAndVerticalFlick
+                    }
 
                     Behavior on contentY {
                         NumberAnimation {

share/qtcreator/qmldesigner/newstateseditor/StateScrollBar.qml

@@ -24,12 +24,17 @@
 ****************************************************************************/
 
 import QtQuick
-import QtQuick.Controls
+import QtQuick.Templates as T
 import StudioTheme 1.0 as StudioTheme
 
-ScrollBar {
+T.ScrollBar {
     id: scrollBar
 
+    implicitWidth: Math.max(implicitBackgroundWidth + leftInset + rightInset,
+                            implicitContentWidth + leftPadding + rightPadding)
+    implicitHeight: Math.max(implicitBackgroundHeight + topInset + bottomInset,
+                             implicitContentHeight + topPadding + bottomPadding)
+
     contentItem: Rectangle {
         implicitWidth: scrollBar.interactive ? 6 : 2
         implicitHeight: scrollBar.interactive ? 6 : 2
@@ -40,8 +45,7 @@ ScrollBar {
 
         states: State {
             name: "active"
-            when: scrollBar.policy === ScrollBar.AlwaysOn
+            when: scrollBar.active && scrollBar.size < 1.0
-                  || (scrollBar.active && scrollBar.size < 1.0)
             PropertyChanges {
                 target: scrollBar.contentItem
                 opacity: 0.75

share/qtcreator/qmldesigner/newstateseditor/StateThumbnail.qml

@@ -286,11 +286,21 @@ Item {
                 }
 
                 Flickable {
+                    id: frame
                     boundsMovement: Flickable.StopAtBounds
                     boundsBehavior: Flickable.StopAtBounds
                     interactive: true
                     contentWidth: column.width
                     contentHeight: column.height
+                    flickableDirection: {
+                        if (frame.contentHeight <= scrollView.height)
+                            return Flickable.HorizontalFlick
+
+                        if (frame.contentWidth <= scrollView.width)
+                            return Flickable.VerticalFlick
+
+                        return Flickable.HorizontalAndVerticalFlick
+                    }
 
                     // ScrollView needs an extra TapHandler on top in order to receive click
                     // events. MouseAreas below ScrollView do not let clicks through.