QmlDesigner.PropertyEditor: Select new created gradient stop

Task-number: QTCREATORBUG-12507
Change-Id: I2d2bc4d478e53b5b5a0faeeda68cd95d7c85377e
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>

share/qtcreator/qmldesigner/propertyEditorQmlSources/HelperWidgets/GradientLine.qml

@@ -122,8 +122,11 @@ Item {
                 onClicked: {
                     var currentPosition = mouseX / colorLine.effectiveWidth
 
-                    gradientModel.addStop(currentPosition, currentColor)
-                    colorLine.select(gradientModel.count - 1)
+                    var newIndex = gradientModel.addStop(currentPosition, currentColor)
+
+                    if (newIndex > 0)
+                        colorLine.select(newIndex)
+
                     colorLine.invalidate()
                 }
                 Item {

src/plugins/qmldesigner/components/propertyeditor/gradientmodel.cpp

@@ -94,13 +94,13 @@ QVariant GradientModel::data(const QModelIndex &index, int role) const
     return QVariant();
 }
 
-void GradientModel::addStop(qreal position, const QColor &color)
+int GradientModel::addStop(qreal position, const QColor &color)
 {
     if (m_lock)
-        return;
+        return -1;
 
     if (!m_itemNode.isValid() || gradientPropertyName().isEmpty())
-        return;
+        return -1;
 
     if (m_itemNode.modelNode().hasNodeProperty(gradientPropertyName().toUtf8())) {
         //QmlDesigner::RewriterTransaction transaction = m_itemNode.modelNode().view()->beginRewriterTransaction();
@@ -125,7 +125,11 @@ void GradientModel::addStop(qreal position, const QColor &color)
         gradientNode.nodeListProperty("stops").slide(stopNodes.count() - 1, properPos);
 
         setupModel();
+
+        return properPos;
     }
+
+    return -1;
 }
 
 void GradientModel::addGradient()

src/plugins/qmldesigner/components/propertyeditor/gradientmodel.h

@@ -53,7 +53,7 @@ public:
     QHash<int, QByteArray> roleNames() const;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
 
-    Q_INVOKABLE void addStop(qreal position, const QColor &color);
+    Q_INVOKABLE int addStop(qreal position, const QColor &color);
     Q_INVOKABLE void addGradient();
 
     Q_INVOKABLE void setColor(int index, const QColor &color);