QmlDesigner: Add support for timeline items

Change-Id: Ie7e05c78c2d817da9dd91c345f1949daa640c6bc
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmldesigner/designercore/include/qmltimelinekeyframes.h

@@ -70,6 +70,10 @@ public:
 
     void moveAllFrames(qreal offset);
     void scaleAllFrames(qreal factor);
+    int getSupposedTargetIndex(qreal newFrame) const;
+
+    int indexOfFrame(const ModelNode &frame) const;
+    void slideFrame(int sourceIndex, int targetIndex);
 };
 
 } //QmlDesigner

src/plugins/qmldesigner/designercore/include/qmltimelinemutator.h

@@ -54,6 +54,8 @@ public:
     qreal currentFrame() const;
     qreal duration() const;
 
+    bool isEnabled() const;
+
     qreal minActualFrame(const ModelNode &target) const;
     qreal maxActualFrame(const ModelNode &target) const;
 

src/plugins/qmldesigner/designercore/model/qmltimelinekeyframes.cpp

@@ -90,6 +90,35 @@ void QmlTimelineFrames::setPropertyName(const PropertyName &propertyName)
     modelNode().variantProperty("property").setValue(QString::fromUtf8(propertyName));
 }
 
+int QmlTimelineFrames::getSupposedTargetIndex(qreal newFrame) const
+{
+    const NodeListProperty nodeListProperty = modelNode().defaultNodeListProperty();
+    int i = 0;
+    for (auto node : nodeListProperty.toModelNodeList()) {
+        if (node.hasVariantProperty("frame")) {
+            const qreal currentFrame = node.variantProperty("frame").value().toReal();
+            if (!qFuzzyCompare(currentFrame, newFrame)) { //Ignore the frame itself
+                if (currentFrame > newFrame)
+                    return i;
+                ++i;
+            }
+        }
+    }
+
+    return nodeListProperty.count();
+}
+
+int QmlTimelineFrames::indexOfFrame(const ModelNode &frame) const
+{
+    return modelNode().defaultNodeListProperty().indexOf(frame);
+}
+
+void QmlTimelineFrames::slideFrame(int sourceIndex, int targetIndex)
+{
+    if (targetIndex != sourceIndex)
+        modelNode().defaultNodeListProperty().slide(sourceIndex, targetIndex);
+}
+
 void QmlTimelineFrames::setValue(const QVariant &value, qreal currentFrame)
 {
 
@@ -104,7 +133,14 @@ void QmlTimelineFrames::setValue(const QVariant &value, qreal currentFrame)
                                                                  {PropertyName("value"), value}};
 
     ModelNode frame = modelNode().view()->createModelNode("QtQuick.Timeline.Keyframe", 1, 0, propertyPairList);
-    modelNode().defaultNodeListProperty().reparentHere(frame);
+    NodeListProperty nodeListProperty = modelNode().defaultNodeListProperty();
+
+    const int sourceIndex = nodeListProperty.count();
+    const int targetIndex = getSupposedTargetIndex(currentFrame);
+
+    nodeListProperty.reparentHere(frame);
+
+    slideFrame(sourceIndex, targetIndex);
 }
 
 QVariant QmlTimelineFrames::value(qreal frame) const

src/plugins/qmldesigner/designercore/model/qmltimelinemutator.cpp

@@ -130,6 +130,11 @@ qreal QmlTimelineMutator::duration() const
     return endFrame() - startFrame();
 }
 
+bool QmlTimelineMutator::isEnabled() const
+{
+    return QmlObjectNode(modelNode()).modelValue("enabled").toBool();
+}
+
 qreal QmlTimelineMutator::minActualFrame(const ModelNode &target) const
 {
     qreal min = std::numeric_limits<double>::max();