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Clone from http://code.qt.io/qt/qtcharts.git

Added hovered signal to QLineSeries. Updated callout example
Marek Rosa -
r2255:31c21c535136
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@@ -14,13 +14,15 Widget::Widget(QWidget *parent)
14 14 : QWidget(parent),
15 15 m_scene(0),
16 16 m_chart(0),
17 m_view(0)
17 m_view(0),
18 m_tooltip(0)
18 19 {
19 20 // chart
20 21 m_chart = new QChart;
21 22 m_chart->setMinimumSize(640, 480);
23 m_chart->setTitle("Hover the line to show callout. Click the line to make it stay");
24 m_chart->legend()->hide();
22 25 QLineSeries *series = new QLineSeries;
23 series->setName("Click the line to create a movable callout");
24 26 series->append(1, 3);
25 27 series->append(4, 5);
26 28 series->append(5, 4.5);
@@ -38,7 +40,8 Widget::Widget(QWidget *parent)
38 40 mainLayout->addWidget(m_view);
39 41 setLayout(mainLayout);
40 42
41 connect(series, SIGNAL(clicked(QPointF)), this, SLOT(addCallout(QPointF)));
43 connect(series, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout()));
44 connect(series, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool)));
42 45 }
43 46
44 47 Widget::~Widget()
@@ -46,11 +49,23 Widget::~Widget()
46 49
47 50 }
48 51
49 void Widget::addCallout(QPointF point)
52 void Widget::keepCallout()
50 53 {
51 Callout *label = new Callout(m_chart);
52 label->setText(QString("X: %1\nY: %2").arg(point.x()).arg(point.y()));
53 label->setAnchor(m_chart->mapFromParent(m_view->mapToScene(m_view->mapFromGlobal(QCursor::pos()))));
54 label->setPos(m_chart->mapFromParent(m_view->mapToScene(m_view->mapFromGlobal(QCursor::pos() + QPoint(10, -50)))));
55 label->setZValue(11);
54 m_tooltip = new Callout(m_chart);
55 }
56
57 void Widget::tooltip(QPointF point, bool state)
58 {
59 if (m_tooltip == 0)
60 m_tooltip = new Callout(m_chart);
61
62 if (state) {
63 m_tooltip->setText(QString("X: %1\nY: %2").arg(point.x()).arg(point.y()));
64 m_tooltip->setAnchor(m_chart->mapFromParent(m_view->mapToScene(m_view->mapFromGlobal(QCursor::pos()))));
65 m_tooltip->setPos(m_chart->mapFromParent(m_view->mapToScene(m_view->mapFromGlobal(QCursor::pos() + QPoint(10, -50)))));
66 m_tooltip->setZValue(11);
67 m_tooltip->show();
68 } else {
69 m_tooltip->hide();
70 }
56 71 }
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@@ -6,6 +6,7
6 6
7 7 class QGraphicsScene;
8 8 class QGraphicsView;
9 class Callout;
9 10
10 11 QTCOMMERCIALCHART_USE_NAMESPACE
11 12
@@ -18,12 +19,14 public:
18 19 ~Widget();
19 20
20 21 public slots:
21 void addCallout(QPointF point);
22 void keepCallout();
23 void tooltip(QPointF point, bool state);
22 24
23 25 private:
24 26 QGraphicsScene *m_scene;
25 27 QChart *m_chart;
26 28 QGraphicsView *m_view;
29 Callout *m_tooltip;
27 30 };
28 31
29 32 #endif // WIDGET_H
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@@ -35,6 +35,7 LineChartItem::LineChartItem(QLineSeries *series, ChartPresenter *presenter)
35 35 m_series(series),
36 36 m_pointsVisible(false)
37 37 {
38 setAcceptHoverEvents(true);
38 39 setZValue(ChartPresenter::LineChartZValue);
39 40 QObject::connect(series->d_func(), SIGNAL(updated()), this, SLOT(handleUpdated()));
40 41 QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated()));
@@ -132,6 +133,18 void LineChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
132 133 QGraphicsItem::mousePressEvent(event);
133 134 }
134 135
136 void LineChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
137 {
138 emit XYChart::hovered(calculateDomainPoint(event->pos()), true);
139 QGraphicsItem::hoverEnterEvent(event);
140 }
141
142 void LineChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
143 {
144 emit XYChart::hovered(calculateDomainPoint(event->pos()), false);
145 QGraphicsItem::hoverEnterEvent(event);
146 }
147
135 148 #include "moc_linechartitem_p.cpp"
136 149
137 150 QTCOMMERCIALCHART_END_NAMESPACE
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@@ -60,6 +60,8 public Q_SLOTS:
60 60 protected:
61 61 void updateGeometry();
62 62 void mousePressEvent(QGraphicsSceneMouseEvent *event);
63 void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
64 void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
63 65
64 66 private:
65 67 QLineSeries *m_series;
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@@ -76,6 +76,7 public:
76 76
77 77 Q_SIGNALS:
78 78 void clicked(const QPointF &point);
79 void hovered(const QPointF &point, bool state);
79 80 void pointReplaced(int index);
80 81 void pointRemoved(int index);
81 82 void pointAdded(int index);
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@@ -47,6 +47,7 XYChart::XYChart(QXYSeries *series, ChartPresenter *presenter)
47 47 QObject::connect(series, SIGNAL(pointAdded(int)), this, SLOT(handlePointAdded(int)));
48 48 QObject::connect(series, SIGNAL(pointRemoved(int)), this, SLOT(handlePointRemoved(int)));
49 49 QObject::connect(this, SIGNAL(clicked(QPointF)), series, SIGNAL(clicked(QPointF)));
50 QObject::connect(this, SIGNAL(hovered(QPointF,bool)), series, SIGNAL(hovered(QPointF,bool)));
50 51 }
51 52
52 53 void XYChart::setGeometryPoints(const QVector<QPointF>& points)
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@@ -74,6 +74,7 public Q_SLOTS:
74 74
75 75 Q_SIGNALS:
76 76 void clicked(const QPointF &point);
77 void hovered(const QPointF &point, bool state);
77 78
78 79 protected:
79 80 virtual void updateChart(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, int index = -1);
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