Playhead range check and status bar improvements

- distinguish between playhead and keyframe value on the status bar.
- update the status bar frame value when a keyframe is being moved.
- when changing or deleting timelines, update the status bar.
- when changing timelines, make sure the playhead is within the new
timeline's range.
- keep playhead in range after changing timeline's start/end.

Task-number: QDS-1071
Change-Id: Id9758e3097d34df9334d6284a6a56ba38b509a31
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

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

@@ -54,7 +54,8 @@ const char timelineInsertKeyframesDisplayName[] = QT_TRANSLATE_NOOP("QmlDesigner
 const char timelineDeleteKeyframesDisplayName[] = QT_TRANSLATE_NOOP("QmlDesignerContextMenu",
                                                                     "Delete All Keyframes");
 
-const char timelineStatusBarFrameNumber[] = QT_TRANSLATE_NOOP("QmlDesignerTimeline", "Frame %1");
+const char statusBarPlayheadFrame[] = QT_TRANSLATE_NOOP("QmlDesignerTimeline", "Playhead frame %1");
+const char statusBarKeyframe[]      = QT_TRANSLATE_NOOP("QmlDesignerTimeline", "Keyframe %1");
 
 const char C_QMLTIMELINE[] = "QmlDesigner::Timeline";
 const char C_SETTINGS[] = "QmlDesigner.Settings";

src/plugins/qmldesigner/components/timelineeditor/timelinegraphicsscene.cpp

@@ -194,7 +194,7 @@ void TimelineGraphicsScene::setCurrentFrame(int frame)
 
     invalidateCurrentValues();
 
-    emitStatusBarFrameMessageChanged(frame);
+    emitStatusBarPlayheadFrameChanged(frame);
 }
 
 void TimelineGraphicsScene::setStartFrame(int frame)
@@ -318,7 +318,7 @@ void TimelineGraphicsScene::commitCurrentFrame(qreal frame)
         setCurrenFrame(timeline, qRound(frame));
         invalidateCurrentValues();
     }
-    emitStatusBarFrameMessageChanged(int(frame));
+    emitStatusBarPlayheadFrameChanged(int(frame));
 }
 
 QList<TimelineKeyframeItem *> TimelineGraphicsScene::selectedKeyframes() const
@@ -700,10 +700,10 @@ void TimelineGraphicsScene::emitScrollOffsetChanged()
         TimelineMovableAbstractItem::emitScrollOffsetChanged(item);
 }
 
-void TimelineGraphicsScene::emitStatusBarFrameMessageChanged(int frame)
+void TimelineGraphicsScene::emitStatusBarPlayheadFrameChanged(int frame)
 {
     emit statusBarMessageChanged(
-        QString(TimelineConstants::timelineStatusBarFrameNumber).arg(frame));
+        tr(TimelineConstants::statusBarPlayheadFrame).arg(frame));
 }
 
 bool TimelineGraphicsScene::event(QEvent *event)

src/plugins/qmldesigner/components/timelineeditor/timelinegraphicsscene.h

@@ -160,7 +160,7 @@ private:
     ModelNode timelineModelNode() const;
 
     void emitScrollOffsetChanged();
-    void emitStatusBarFrameMessageChanged(int frame);
+    void emitStatusBarPlayheadFrameChanged(int frame);
 
     QList<QGraphicsItem *> itemsAt(const QPointF &pos);
 

src/plugins/qmldesigner/components/timelineeditor/timelinemovetool.cpp

@@ -100,6 +100,9 @@ void TimelineMoveTool::mouseMoveEvent(TimelineMovableAbstractItem *item,
 
         current->setPosition(sourceFrame + deltaFrame);
 
+        scene()->statusBarMessageChanged(tr(TimelineConstants::statusBarKeyframe)
+                                         .arg(sourceFrame + deltaFrame));
+
         for (auto *keyframe : scene()->selectedKeyframes()) {
             if (keyframe != current) {
                 qreal pos = std::round(current->mapFromSceneToFrame(keyframe->rect().center().x()));
@@ -125,30 +128,37 @@ void TimelineMoveTool::mouseReleaseEvent(TimelineMovableAbstractItem *item,
             double start = current->mapFromFrameToScene(scene()->startFrame());
             double end = current->mapFromFrameToScene(scene()->endFrame());
 
-            if (mousePos < start) {
-                scene()->setCurrentFrame(scene()->startFrame());
-                scene()->statusBarMessageChanged(QObject::tr("Frame %1").arg(scene()->startFrame()));
-                return;
-            } else if (mousePos > end) {
-                scene()->setCurrentFrame(scene()->endFrame());
-                scene()->statusBarMessageChanged(QObject::tr("Frame %1").arg(scene()->endFrame()));
+            double limitFrame = -999999.;
+            if (mousePos < start)
+                limitFrame = scene()->startFrame();
+            else if (mousePos > end)
+                limitFrame = scene()->endFrame();
+
+            if (limitFrame > -999999.) {
+                scene()->setCurrentFrame(limitFrame);
+                scene()->statusBarMessageChanged(
+                            tr(TimelineConstants::statusBarPlayheadFrame).arg(limitFrame));
                 return;
             }
         }
 
-        scene()->timelineView()->executeInTransaction("TimelineMoveTool::mouseReleaseEvent", [this, current](){
+        scene()->timelineView()->executeInTransaction("TimelineMoveTool::mouseReleaseEvent",
+                                                      [this, current]() {
             current->commitPosition(mapToItem(current, current->rect().center()));
 
             if (current->asTimelineKeyframeItem()) {
                 double frame = std::round(
                             current->mapFromSceneToFrame(current->rect().center().x()));
 
-                scene()->statusBarMessageChanged(QObject::tr("Frame %1").arg(frame));
+                scene()->statusBarMessageChanged(
+                            tr(TimelineConstants::statusBarKeyframe).arg(frame));
 
-                for (auto keyframe : scene()->selectedKeyframes())
+                const auto selectedKeyframes = scene()->selectedKeyframes();
+                for (auto keyframe : selectedKeyframes) {
                     if (keyframe != current)
                         keyframe->commitPosition(mapToItem(current, keyframe->rect().center()));
                 }
+            }
         });
     }
 }

src/plugins/qmldesigner/components/timelineeditor/timelinemovetool.h

@@ -37,6 +37,8 @@ class TimelineMovableAbstractItem;
 
 class TimelineMoveTool : public TimelineAbstractTool
 {
+    Q_DECLARE_TR_FUNCTIONS(TimelineMoveTool)
+
 public:
     explicit TimelineMoveTool(TimelineGraphicsScene *scene, TimelineToolDelegate *delegate);
     void mousePressEvent(TimelineMovableAbstractItem *item,

src/plugins/qmldesigner/components/timelineeditor/timelinewidget.cpp

@@ -405,14 +405,18 @@ void TimelineWidget::contextHelp(const Core::IContext::HelpCallback &callback) c
 void TimelineWidget::init()
 {
     QmlTimeline currentTimeline = m_timelineView->timelineForState(m_timelineView->currentState());
-    if (currentTimeline.isValid())
+    if (currentTimeline.isValid()) {
         setTimelineId(currentTimeline.modelNode().id());
-    else
+        m_statusBar->setText(tr(TimelineConstants::statusBarPlayheadFrame)
+                             .arg(getcurrentFrame(currentTimeline)));
+    } else {
         setTimelineId({});
+        m_statusBar->clear();
+    }
 
-    invalidateTimelineDuration(graphicsScene()->currentTimeline());
+    invalidateTimelineDuration(m_graphicsScene->currentTimeline());
 
-    graphicsScene()->setWidth(m_graphicsView->viewport()->width());
+    m_graphicsScene->setWidth(m_graphicsView->viewport()->width());
 
     // setScaleFactor uses QSignalBlocker.
     m_toolbar->setScaleFactor(0);
@@ -442,7 +446,14 @@ void TimelineWidget::invalidateTimelineDuration(const QmlTimeline &timeline)
         QmlTimeline currentTimeline = graphicsScene()->currentTimeline();
         if (currentTimeline.isValid() && currentTimeline == timeline) {
             graphicsScene()->setTimeline(timeline);
-            graphicsScene()->setCurrenFrame(timeline, getcurrentFrame(timeline));
+
+            qreal playHeadFrame = getcurrentFrame(timeline);
+            if (playHeadFrame < timeline.startKeyframe())
+                playHeadFrame = timeline.startKeyframe();
+            else if (playHeadFrame > timeline.endKeyframe())
+                playHeadFrame = timeline.endKeyframe();
+
+            graphicsScene()->setCurrentFrame(playHeadFrame);
         }
     }
 }