QmlProfiler: allow interactive resizing of rows in timeline

Task-number: QTCREATORBUG-12337
Change-Id: Ib9ddb128605831841023bb3cc9aed758ed171de9
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/qml/CategoryLabel.qml

@@ -39,6 +39,8 @@ Item {
     property var extdescriptions: []
     property var eventIds: []
 
+    readonly property int dragHeight: 5
+
     function trigger(i) {
         return i * bindingTrigger * bindingTrigger;
     }
@@ -116,16 +118,28 @@ Item {
                     verticalAlignment: Text.AlignVCenter
                 }
                 MouseArea {
+                    property bool resizing: false
                     anchors.fill: parent
                     hoverEnabled: true
+                    cursorShape: (resizing || height - mouseY < dragHeight) ? Qt.SizeVerCursor :
+                                                                              Qt.ArrowCursor;
                     onEntered: changeToolTip(extdescriptions[index]);
                     onExited: changeToolTip("");
+                    onPressed: resizing = (height - mouseY < dragHeight);
+
+                    onReleased: resizing = false;
+
                     onClicked: {
                         if (mouse.modifiers & Qt.ShiftModifier)
                             view.selectPrevFromId(modelIndex,eventIds[index]);
                         else
                             view.selectNextFromId(modelIndex,eventIds[index]);
                     }
+
+                    onMouseYChanged: {
+                        if (resizing)
+                            qmlProfilerModelProxy.setRowHeight(modelIndex, index + 1, mouseY);
+                    }
                 }
             }
         }

src/plugins/qmlprofiler/timelinerenderer.cpp

@@ -53,12 +53,16 @@ TimelineRenderer::TimelineRenderer(QQuickPaintedItem *parent) :
 
 void TimelineRenderer::setProfilerModelProxy(QObject *profilerModelProxy)
 {
-    if (m_profilerModelProxy)
+    if (m_profilerModelProxy) {
         disconnect(m_profilerModelProxy, SIGNAL(expandedChanged()), this, SLOT(requestPaint()));
+        disconnect(m_profilerModelProxy, SIGNAL(rowHeightChanged()), this, SLOT(requestPaint()));
+    }
     m_profilerModelProxy = qobject_cast<TimelineModelAggregator *>(profilerModelProxy);
 
-    if (m_profilerModelProxy)
+    if (m_profilerModelProxy) {
         connect(m_profilerModelProxy, SIGNAL(expandedChanged()), this, SLOT(requestPaint()));
+        connect(m_profilerModelProxy, SIGNAL(rowHeightChanged()), this, SLOT(requestPaint()));
+    }
     emit profilerModelProxyChanged(m_profilerModelProxy);
 }