QmlProfiler: Provide a horizontal scroll bar for the timeline

This requires the consolidation of the nested Flickable elements into
one, which is probably a good idea anyway. The horizontal scroll bar is
important because people might not understand that they can use the
overview for scrolling.

Change-Id: Ie1555265fc3edafaf6e6e4f34d77b0d034d45639
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/qml/MainView.qml

@@ -66,6 +66,8 @@ Rectangle {
     property date recordingStartDate
     property real elapsedTime
 
+    color: "#dcdcdc"
+
     // ***** connections with external objects
     Connections {
         target: zoomControl
@@ -230,12 +232,51 @@ Rectangle {
     }
 
     Flickable {
-        id: vertflick
+        id: labelsflick
         flickableDirection: Flickable.VerticalFlick
-        anchors.fill: parent
-        clip: true
+        interactive: false
+        anchors.top: parent.top
+        anchors.bottom: parent.bottom
+        anchors.left: parent.left
+        width: labels.width
+        contentY: flick.contentY
+
+        Rectangle {
+            id: labels
+            anchors.left: parent.left
+            width: 150
+            color: root.color
+            height: col.height
+
+            property int rowCount: qmlProfilerModelProxy.categoryCount();
+
+            Column {
+                id: col
+                Repeater {
+                    model: labels.rowCount
+                    delegate: CategoryLabel { }
+                }
+            }
+        }
+    }
+
+    // border between labels and timeline
+    Rectangle {
+        id: labelsborder
+        anchors.left: labelsflick.right
+        anchors.top: parent.top
+        anchors.bottom: parent.bottom
+        width: 1
+        color: "#858585"
+    }
+
+    Flickable {
+        id: flick
         contentHeight: labels.height
+        contentWidth: 0
+        flickableDirection: Flickable.HorizontalAndVerticalFlick
         boundsBehavior: Flickable.StopAtBounds
+        clip:true
 
         // ScrollView will try to deinteractivate it. We don't want that
         // as the horizontal flickable is interactive, too. We do occasionally
@@ -244,41 +285,27 @@ Rectangle {
         onInteractiveChanged: interactive = stayInteractive
         onStayInteractiveChanged: interactive = stayInteractive
 
-        // ***** child items
-        TimeMarks {
-            id: backgroundMarks
-            y: vertflick.contentY
-            height: vertflick.height
-            width: root.width - labels.width
-            anchors.left: labels.right
-        }
-
-        Flickable {
         function setContentWidth() {
             var duration = Math.abs(zoomControl.endTime() - zoomControl.startTime());
             if (duration > 0)
                 contentWidth = qmlProfilerModelProxy.traceDuration() * width / duration;
         }
 
-            id: flick
-            anchors.top: parent.top
-            anchors.topMargin: labels.y
-            anchors.right: parent.right
-            anchors.left: labels.right
-            contentWidth: 0
-            height: labels.height + labelsTail.height
-            flickableDirection: Flickable.HorizontalFlick
-            boundsBehavior: Flickable.StopAtBounds
-
         onContentXChanged: view.updateZoomControl()
         onWidthChanged: setContentWidth()
 
-            clip:true
+        // ***** child items
+        TimeMarks {
+            id: backgroundMarks
+            y: flick.contentY
+            x: flick.contentX
+            height: flick.height
+            width: scroller.width
+        }
 
         SelectionRange {
             id: selectionRange
             visible: root.selectionRangeMode && creationState !== 0
-                height: parent.height
             z: 2
         }
 
@@ -288,9 +315,11 @@ Rectangle {
             profilerModelProxy: qmlProfilerModelProxy
 
             x: flick.contentX
-                y: vertflick.contentY
-                width: flick.width
-                height: vertflick.height
+            y: flick.contentY
+
+            // paint "under" the vertical scrollbar, so that it always matches with the timemarks
+            width: scroller.width
+            height: flick.height
 
             onEndTimeChanged: requestPaint()
             onYChanged: requestPaint()
@@ -360,6 +389,7 @@ Rectangle {
             width: flick.width
             height: flick.height
             x: flick.contentX
+            y: flick.contentY
             hoverEnabled: enabled
             z: 2
 
@@ -378,44 +408,13 @@ Rectangle {
         }
     }
 
-        Rectangle {
-            id: labels
-            width: 150
-            color: "#dcdcdc"
-            height: col.height
-
-            property int rowCount: qmlProfilerModelProxy.categoryCount();
-
-            Column {
-                id: col
-                Repeater {
-                    model: labels.rowCount
-                    delegate: CategoryLabel { }
-                }
-            }
-        }
-
-        Rectangle {
-            id: labelsTail
-            anchors.top: labels.bottom
-            height: Math.max(0, vertflick.height - labels.height)
-            width: labels.width
-            color: labels.color
-        }
-
-        // border between labels and timeline
-        Rectangle {
-            anchors.left: labels.right
-            anchors.top: labels.top
-            anchors.bottom: labelsTail.bottom
-            width: 1
-            color: "#858585"
-        }
-    }
-
     ScrollView {
-        contentItem: vertflick
-        anchors.fill: parent
+        id: scroller
+        contentItem: flick
+        anchors.left: labelsborder.right
+        anchors.top: parent.top
+        anchors.bottom: parent.bottom
+        anchors.right: parent.right
     }
 
     SelectionRangeDetails {

src/plugins/qmlprofiler/qml/SelectionRange.qml

@@ -107,8 +107,7 @@ RangeMover {
     // creation control
     function releasedOnCreation() {
         if (selectionRange.creationState === 2) {
-            flick.interactive = true;
-            vertflick.stayInteractive = true;
+            flick.stayInteractive = true;
             selectionRange.creationState = 3;
             selectionRangeControl.enabled = false;
         }
@@ -116,8 +115,7 @@ RangeMover {
 
     function pressedOnCreation() {
         if (selectionRange.creationState === 1) {
-            flick.interactive = false;
-            vertflick.stayInteractive = false;
+            flick.stayInteractive = false;
             selectionRange.setPos(selectionRangeControl.mouseX + flick.contentX);
             selectionRange.creationState = 2;
         }

src/plugins/qmlprofiler/qml/TimeMarks.qml

@@ -128,7 +128,7 @@ Canvas {
         // bottom
         if (height > labels.height - y) {
             context.fillStyle = "#f5f5f5";
-            context.fillRect(0, labels.height - y, width, Math.min(height - labels.height + y, labelsTail.height));
+            context.fillRect(0, labels.height - y, width, height - labels.height + y);
         }
     }
 }