CurveEditor: Fix bounding rect computation for the graphicsscene

Task-number: QDS-2957
Change-Id: I0019d538e7460e923b35024bd02f7186e1935f6b
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/curveeditor/curveeditormodel.cpp

@@ -39,10 +39,10 @@
 
 namespace DesignTools {
 
-CurveEditorModel::CurveEditorModel(double minTime, double maxTime, QObject *parent)
+CurveEditorModel::CurveEditorModel(QObject *parent)
     : TreeModel(parent)
-    , m_minTime(minTime)
-    , m_maxTime(maxTime)
+    , m_minTime(CurveEditorStyle::defaultTimeMin)
+    , m_maxTime(CurveEditorStyle::defaultTimeMax)
 {}
 
 CurveEditorModel::~CurveEditorModel() {}

src/plugins/qmldesigner/components/curveeditor/curveeditormodel.h

@@ -57,7 +57,7 @@ signals:
     void curveChanged(PropertyTreeItem *item);
 
 public:
-    CurveEditorModel(double minTime, double maxTime, QObject *parent = nullptr);
+    CurveEditorModel(QObject *parent = nullptr);
 
     ~CurveEditorModel() override;
 

src/plugins/qmldesigner/components/curveeditor/curveeditorstyle.h

@@ -105,6 +105,13 @@ struct Shortcuts
 
 struct CurveEditorStyle
 {
+    static constexpr double defaultTimeMin = 0.0;
+    static constexpr double defaultTimeMax = 100.0;
+    static constexpr double defaultValueMin = -1.0;
+    static constexpr double defaultValueMax = 1.0;
+
+    static double defaultValueRange() { return std::abs(defaultValueMin - defaultValueMax); }
+
     Shortcuts shortcuts;
 
     QBrush backgroundBrush = QBrush(QColor(5, 0, 100));
@@ -124,7 +131,7 @@ struct CurveEditorStyle
     double valueAxisWidth = 60.0;
     double valueOffsetTop = 10.0;
     double valueOffsetBottom = 10.0;
-    double labelDensityY = 1.5;
+    double labelDensityY = 2.0;
 
     HandleItemStyleOption handleStyle;
     KeyframeItemStyleOption keyframeStyle;

src/plugins/qmldesigner/components/curveeditor/curveeditorview.cpp

@@ -42,7 +42,7 @@ namespace QmlDesigner {
 CurveEditorView::CurveEditorView(QObject *parent)
     : AbstractView(parent)
     , m_block(false)
-    , m_model(new DesignTools::CurveEditorModel(0., 500.))
+    , m_model(new DesignTools::CurveEditorModel())
     , m_editor(new DesignTools::CurveEditor(m_model))
 {
     Q_UNUSED(parent);
@@ -267,7 +267,7 @@ ModelNode getTargetNode1(DesignTools::PropertyTreeItem *item, const QmlTimeline
         QString targetId = nodeItem->name();
         if (timeline.isValid()) {
             for (auto &&target : timeline.allTargets()) {
-                if (target.displayName() == targetId)
+                if (target.isValid() && target.displayName() == targetId)
                     return target;
             }
         }

src/plugins/qmldesigner/components/curveeditor/detail/curveitem.cpp

@@ -87,6 +87,16 @@ QRectF CurveItem::boundingRect() const
     for (auto *item : m_keyframes)
         bbox(bounds, item->keyframe());
 
+    if (auto *s = qobject_cast<GraphicsScene *>(scene())) {
+        bounds.setLeft(s->animationRangeMin());
+        bounds.setRight(s->animationRangeMax());
+    }
+
+    if (qFuzzyCompare(bounds.height(), 0.0)) {
+        auto tmp = CurveEditorStyle::defaultValueRange() / 2.0;
+        bounds.adjust(0.0, -tmp, 0.0, tmp);
+    }
+
     return m_transform.mapRect(bounds);
 }
 

src/plugins/qmldesigner/components/curveeditor/detail/graphicsscene.cpp

@@ -114,9 +114,29 @@ double GraphicsScene::maximumValue() const
     return limits().top();
 }
 
+double GraphicsScene::animationRangeMin() const
+{
+    if (GraphicsView *gview = graphicsView())
+        return gview->minimumTime();
+
+    return minimumTime();
+}
+
+double GraphicsScene::animationRangeMax() const
+{
+    if (GraphicsView *gview = graphicsView())
+        return gview->maximumTime();
+
+    return maximumTime();
+}
+
 QRectF GraphicsScene::rect() const
 {
-    return sceneRect();
+    QRectF rect;
+    for (auto *curve : curves())
+        rect |= curve->boundingRect();
+
+    return rect;
 }
 
 QVector<CurveItem *> GraphicsScene::curves() const
@@ -410,6 +430,11 @@ QRectF GraphicsScene::limits() const
         }
 
         m_limits = QRectF(QPointF(min.x(), max.y()), QPointF(max.x(), min.y()));
+        if (qFuzzyCompare(m_limits.height(), 0.0)) {
+            auto tmp = CurveEditorStyle::defaultValueRange() / 2.0;
+            m_limits.adjust(0.0, tmp, 0.0, -tmp);
+        }
+
         m_dirty = false;
     }
     return m_limits;

src/plugins/qmldesigner/components/curveeditor/detail/graphicsscene.h

@@ -67,6 +67,10 @@ public:
 
     double maximumValue() const;
 
+    double animationRangeMin() const;
+
+    double animationRangeMax() const;
+
     QRectF rect() const;
 
     QVector<CurveItem *> curves() const;

src/plugins/qmldesigner/components/curveeditor/detail/graphicsview.cpp

@@ -126,12 +126,12 @@ double GraphicsView::maximumTime() const
 
 double GraphicsView::minimumValue() const
 {
-    return m_scene->empty() ? -1.0 : m_scene->minimumValue();
+    return m_scene->empty() ? CurveEditorStyle::defaultValueMin : m_scene->minimumValue();
 }
 
 double GraphicsView::maximumValue() const
 {
-    return m_scene->empty() ? 1.0 : m_scene->maximumValue();
+    return m_scene->empty() ? CurveEditorStyle::defaultValueMax : m_scene->maximumValue();
 }
 
 double GraphicsView::zoomX() const