QmlDesigner: Allow to assign custom colors to the timeline bar items

Cherry-picked from: ac0cf3ecacf84b87a6b654d6bbcbed6103458bd9

Note that there need to be changes to the auxiliary-data-mechanism
in order to make persistence of these color settings reliable

Change-Id: Id88e4e862ad00bef1c3830c0468691c5aa46ec67
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/qmldesignerextension/timelineeditor/timelineconstants.h

@@ -69,6 +69,8 @@ const char C_CURVE_PICKER[] = "QmlDesigner.CurvePicker";
 const char C_ZOOM_IN[] = "QmlDesigner.ZoomIn";
 const char C_ZOOM_OUT[] = "QmlDesigner.ZoomOut";
 
+const char C_BAR_ITEM_OVERRIDE[] = "Timeline.OverrideColor";
+
 const int keyFrameSize = 17;
 const int keyFrameMargin = 2;
 } // namespace TimelineConstants

src/plugins/qmldesigner/qmldesignerextension/timelineeditor/timelinesectionitem.cpp

@@ -44,6 +44,7 @@
 #include <utils/qtcassert.h>
 
 #include <QAction>
+#include <QColorDialog>
 #include <QComboBox>
 #include <QGraphicsProxyWidget>
 #include <QGraphicsScene>
@@ -200,6 +201,11 @@ bool TimelineSectionItem::isSelected() const
     return m_targetNode.isValid() && m_targetNode.isSelected();
 }
 
+ModelNode TimelineSectionItem::targetNode() const
+{
+    return m_targetNode;
+}
+
 QVector<qreal> TimelineSectionItem::keyframePositions() const
 {
     QVector<qreal> out;
@@ -841,17 +847,24 @@ void TimelineBarItem::scrollOffsetChanged()
     sectionItem()->invalidateBar();
 }
 
-void TimelineBarItem::paint(QPainter *painter,
+void TimelineBarItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
-                            const QStyleOptionGraphicsItem *option,
-                            QWidget *widget)
 {
     Q_UNUSED(option);
     Q_UNUSED(widget);
 
-    const QColor brushColorSelected = Theme::getColor(Theme::QmlDesigner_HighlightColor);
+    QColor brushColorSelected = Theme::getColor(Theme::QmlDesigner_HighlightColor);
-    const QColor brushColor = Theme::getColor(Theme::QmlDesigner_HighlightColor).darker(120);
+    QColor brushColor = Theme::getColor(Theme::QmlDesigner_HighlightColor).darker(120);
     const QColor indicatorColor = Theme::getColor(Theme::PanelTextColorLight);
 
+    ModelNode target = sectionItem()->targetNode();
+    if (target.isValid()) {
+        QColor overrideColor = target.auxiliaryData(TimelineConstants::C_BAR_ITEM_OVERRIDE).value<QColor>();
+        if (overrideColor.isValid()) {
+            brushColorSelected = overrideColor;
+            brushColor = brushColorSelected.darker(120);
+        }
+    }
+
     const QRectF itemRect = rect();
 
     painter->save();
@@ -902,6 +915,34 @@ void TimelineBarItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
     }
 }
 
+void TimelineBarItem::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
+{
+    QMenu menu;
+    QAction* overrideColor = menu.addAction(tr("Override Color"));
+
+    auto setColor = [this] () {
+        ModelNode target = sectionItem()->targetNode();
+        if (target.isValid()) {
+            QColor current = target.auxiliaryData(TimelineConstants::C_BAR_ITEM_OVERRIDE).value<QColor>();
+            QColor color = QColorDialog::getColor(current, nullptr);
+            if (color.isValid())
+                target.setAuxiliaryData(TimelineConstants::C_BAR_ITEM_OVERRIDE, color);
+        }
+    };
+
+    QObject::connect(overrideColor, &QAction::triggered, setColor);
+
+    QAction* resetColor = menu.addAction(tr("Reset Color"));
+    auto reset = [this]() {
+        ModelNode target = sectionItem()->targetNode();
+        if (target.isValid())
+            target.removeAuxiliaryData(TimelineConstants::C_BAR_ITEM_OVERRIDE);
+    };
+    QObject::connect(resetColor, &QAction::triggered, reset);
+
+    menu.exec(event->screenPos());
+}
+
 TimelineSectionItem *TimelineBarItem::sectionItem() const
 {
     /* The parentItem is always a TimelineSectionItem. See constructor */

src/plugins/qmldesigner/qmldesignerextension/timelineeditor/timelinesectionitem.h

@@ -54,7 +54,7 @@ protected:
                const QStyleOptionGraphicsItem *option,
                QWidget *widget = nullptr) override;
     void hoverMoveEvent(QGraphicsSceneHoverEvent *) override;
-
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent * event) override;
 private:
     TimelineSectionItem *sectionItem() const;
 
@@ -105,6 +105,7 @@ public:
     AbstractView *view() const;
     bool isSelected() const;
 
+    ModelNode targetNode() const;
     QVector<qreal> keyframePositions() const;
 
 protected: