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legend example update
sauimone -
r1273:096757dada5b
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@@ -16,6 +16,7 MainWidget::MainWidget(QWidget *parent) :
16 m_setCount = 0;
16 m_setCount = 0;
17 m_chart = new QChart();
17 m_chart = new QChart();
18
18
19 //![1]
19 m_buttonLayout = new QGridLayout();
20 m_buttonLayout = new QGridLayout();
20 QPushButton *detachLegendButton = new QPushButton("detach legend");
21 QPushButton *detachLegendButton = new QPushButton("detach legend");
21 connect(detachLegendButton, SIGNAL(clicked()), this, SLOT(detachLegend()));
22 connect(detachLegendButton, SIGNAL(clicked()), this, SLOT(detachLegend()));
@@ -30,18 +31,17 MainWidget::MainWidget(QWidget *parent) :
30 QPushButton *removeBarsetButton = new QPushButton("remove barset");
31 QPushButton *removeBarsetButton = new QPushButton("remove barset");
31 connect(removeBarsetButton, SIGNAL(clicked()), this, SLOT(removeBarset()));
32 connect(removeBarsetButton, SIGNAL(clicked()), this, SLOT(removeBarset()));
32 m_buttonLayout->addWidget(removeBarsetButton, 3, 0);
33 m_buttonLayout->addWidget(removeBarsetButton, 3, 0);
33
34 //![1]
34 // add row with empty label to make all the other rows static
35 m_buttonLayout->addWidget(new QLabel(""), m_buttonLayout->rowCount(), 0);
36 m_buttonLayout->setRowStretch(m_buttonLayout->rowCount() - 1, 1);
37
35
38 // Create chart view with the chart
36 // Create chart view with the chart
39 m_chartView = new QChartView(m_chart, this);
37 m_chartView = new QChartView(m_chart, this);
40 m_chartView->setRubberBand(QChartView::HorizonalRubberBand);
38 m_chartView->setRubberBand(QChartView::HorizonalRubberBand);
41
39
40 //![2]
42 m_customView = new QGraphicsView(this);
41 m_customView = new QGraphicsView(this);
43 m_customScene = new QGraphicsScene(this);
42 m_customScene = new QGraphicsScene(this);
44 m_customView->setScene(m_customScene);
43 m_customView->setScene(m_customScene);
44 //![2]
45
45
46 // Create layout for grid and detached legend
46 // Create layout for grid and detached legend
47 m_mainLayout = new QGridLayout();
47 m_mainLayout = new QGridLayout();
@@ -55,61 +55,55 MainWidget::MainWidget(QWidget *parent) :
55
55
56 void MainWidget::createSeries()
56 void MainWidget::createSeries()
57 {
57 {
58 //![1]
59 m_series = new QBarSeries();
58 m_series = new QBarSeries();
60
61 addBarset();
59 addBarset();
62 addBarset();
60 addBarset();
63 addBarset();
61 addBarset();
64 addBarset();
62 addBarset();
65 //![1]
66
63
67 //![2]
68 m_chart->addSeries(m_series);
64 m_chart->addSeries(m_series);
69 m_chart->setTitle("Legend detach example");
65 m_chart->setTitle("Legend detach example");
70 //![2]
71
66
72 //![3]
73 m_chart->legend()->setVisible(true);
67 m_chart->legend()->setVisible(true);
74 m_chart->legend()->setAlignment(QLegend::AlignmentBottom);
68 m_chart->legend()->setAlignment(QLegend::AlignmentBottom);
75 m_chart->axisY()->setNiceNumbersEnabled(true);
69 m_chart->axisY()->setNiceNumbersEnabled(true);
76 //![3]
77
70
78 //![4]
79 m_chartView->setRenderHint(QPainter::Antialiasing);
71 m_chartView->setRenderHint(QPainter::Antialiasing);
80 //![4]
81 }
72 }
82
73
83 void MainWidget::attachLegend()
74 void MainWidget::detachLegend()
84 {
75 {
85 qDebug() << "attach legend";
76 //![3]
77 // Detach legend from chart
86 QLegend *legend = m_chart->legend();
78 QLegend *legend = m_chart->legend();
79 legend->detachFromChart();
87
80
88 if (m_customScene->items().contains(legend)) {
81 // Put legend to our custom scene
89 qDebug() << "legend removed from other scene";
82 m_customScene->addItem(legend);
90 m_customScene->removeItem(legend);
83 //![3]
91 legend->setParent(m_chart);
92 legend->attachToChart();
93 }
94
84
95 // legend->attachToChart();
96 // This causes redraw
85 // This causes redraw
97 QSize size(1,1);
86 QSize size(1,1);
98 this->resize(this->size() + size);
87 this->resize(this->size() + size);
99 this->resize(this->size() - size);
88 this->resize(this->size() - size);
100 }
89 }
101
90
102 void MainWidget::detachLegend()
91
92 void MainWidget::attachLegend()
103 {
93 {
104 qDebug() << "detach legend";
94 //![4]
105 QLegend *legend = m_chart->legend();
95 QLegend *legend = m_chart->legend();
106 legend->detachFromChart();
107
96
108 m_customScene->addItem(legend);
97 if (m_customScene->items().contains(legend)) {
109 // m_mainLayout->addWidget(legend,0,2,3,1);
98 // Remove legend from custom scene and put it back to chartview scene.
110 // setLayout(m_layout);
99 // Attach legend back to chart, so that layout works.
100 m_customScene->removeItem(legend);
101 legend->setParent(m_chart);
102 m_chartView->scene()->addItem(legend);
103 legend->attachToChart();
104 }
105 //![4]
111
106
112 // TODO: layout legend to somewhere else
113 // This causes redraw
107 // This causes redraw
114 QSize size(1,1);
108 QSize size(1,1);
115 this->resize(this->size() + size);
109 this->resize(this->size() + size);
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@@ -23,8 +23,8 public:
23 signals:
23 signals:
24
24
25 public slots:
25 public slots:
26 void attachLegend();
27 void detachLegend();
26 void detachLegend();
27 void attachLegend();
28 void addBarset();
28 void addBarset();
29 void removeBarset();
29 void removeBarset();
30
30
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