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legend example update
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r1273:096757dada5b
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1 #include "mainwidget.h"
1 #include "mainwidget.h"
2 #include <QChart>
2 #include <QChart>
3 #include <QChartView>
3 #include <QChartView>
4 #include <QPushButton>
4 #include <QPushButton>
5 #include <QLabel>
5 #include <QLabel>
6 #include <QDebug>
6 #include <QDebug>
7 #include <QBarSet>
7 #include <QBarSet>
8 #include <QBarSeries>
8 #include <QBarSeries>
9 #include <QLegend>
9 #include <QLegend>
10
10
11 QTCOMMERCIALCHART_USE_NAMESPACE
11 QTCOMMERCIALCHART_USE_NAMESPACE
12
12
13 MainWidget::MainWidget(QWidget *parent) :
13 MainWidget::MainWidget(QWidget *parent) :
14 QWidget(parent)
14 QWidget(parent)
15 {
15 {
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()));
22 m_buttonLayout->addWidget(detachLegendButton, 0, 0);
23 m_buttonLayout->addWidget(detachLegendButton, 0, 0);
23 QPushButton *attachLegendButton = new QPushButton("attach legend");
24 QPushButton *attachLegendButton = new QPushButton("attach legend");
24 connect(attachLegendButton, SIGNAL(clicked()), this, SLOT(attachLegend()));
25 connect(attachLegendButton, SIGNAL(clicked()), this, SLOT(attachLegend()));
25 m_buttonLayout->addWidget(attachLegendButton, 1, 0);
26 m_buttonLayout->addWidget(attachLegendButton, 1, 0);
26
27
27 QPushButton *addSetButton = new QPushButton("add barset");
28 QPushButton *addSetButton = new QPushButton("add barset");
28 connect(addSetButton, SIGNAL(clicked()), this, SLOT(addBarset()));
29 connect(addSetButton, SIGNAL(clicked()), this, SLOT(addBarset()));
29 m_buttonLayout->addWidget(addSetButton, 2, 0);
30 m_buttonLayout->addWidget(addSetButton, 2, 0);
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();
48 m_mainLayout->addLayout(m_buttonLayout, 0, 0);
48 m_mainLayout->addLayout(m_buttonLayout, 0, 0);
49 m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
49 m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
50 m_mainLayout->addWidget(m_customView, 0, 2, 3, 1);
50 m_mainLayout->addWidget(m_customView, 0, 2, 3, 1);
51 setLayout(m_mainLayout);
51 setLayout(m_mainLayout);
52
52
53 createSeries();
53 createSeries();
54 }
54 }
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);
116 this->resize(this->size() - size);
110 this->resize(this->size() - size);
117 }
111 }
118
112
119 void MainWidget::addBarset()
113 void MainWidget::addBarset()
120 {
114 {
121 QBarSet *barSet = new QBarSet(QString("set ") + QString::number(m_setCount));
115 QBarSet *barSet = new QBarSet(QString("set ") + QString::number(m_setCount));
122 m_setCount++;
116 m_setCount++;
123 qreal delta = m_series->barsetCount() * 0.1;
117 qreal delta = m_series->barsetCount() * 0.1;
124 *barSet << QPointF(0.0 + delta, 1 + delta) << QPointF(1.0 + delta, 2 + delta) << QPointF(2.0 + delta, 3 + delta) << QPointF(3.0 + delta, 4 + delta);
118 *barSet << QPointF(0.0 + delta, 1 + delta) << QPointF(1.0 + delta, 2 + delta) << QPointF(2.0 + delta, 3 + delta) << QPointF(3.0 + delta, 4 + delta);
125 m_series->append(barSet);
119 m_series->append(barSet);
126 }
120 }
127
121
128 void MainWidget::removeBarset()
122 void MainWidget::removeBarset()
129 {
123 {
130 QList<QBarSet*> sets = m_series->barSets();
124 QList<QBarSet*> sets = m_series->barSets();
131 if (sets.count() > 0) {
125 if (sets.count() > 0) {
132 m_series->remove(sets.at(sets.count()-1));
126 m_series->remove(sets.at(sets.count()-1));
133 }
127 }
134 }
128 }
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@@ -1,49 +1,49
1 #ifndef MAINWIDGET_H
1 #ifndef MAINWIDGET_H
2 #define MAINWIDGET_H
2 #define MAINWIDGET_H
3
3
4 #include "qchartglobal.h"
4 #include "qchartglobal.h"
5 #include "qchart.h"
5 #include "qchart.h"
6 #include "qchartview.h"
6 #include "qchartview.h"
7 #include <QWidget>
7 #include <QWidget>
8 #include <QGraphicsWidget>
8 #include <QGraphicsWidget>
9 #include <QGridLayout>
9 #include <QGridLayout>
10 #include <QGraphicsGridLayout>
10 #include <QGraphicsGridLayout>
11
11
12 QTCOMMERCIALCHART_USE_NAMESPACE
12 QTCOMMERCIALCHART_USE_NAMESPACE
13
13
14 class MainWidget : public QWidget
14 class MainWidget : public QWidget
15 //class MainWidget : public QGraphicsWidget
15 //class MainWidget : public QGraphicsWidget
16 {
16 {
17 Q_OBJECT
17 Q_OBJECT
18 public:
18 public:
19 explicit MainWidget(QWidget *parent = 0);
19 explicit MainWidget(QWidget *parent = 0);
20
20
21 void createSeries();
21 void createSeries();
22
22
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
31 private:
31 private:
32
32
33 QChart *m_chart;
33 QChart *m_chart;
34 QBarSeries *m_series;
34 QBarSeries *m_series;
35
35
36 QGraphicsScene *m_scene;
36 QGraphicsScene *m_scene;
37 QChartView *m_chartView;
37 QChartView *m_chartView;
38 QGridLayout *m_mainLayout;
38 QGridLayout *m_mainLayout;
39 QGridLayout *m_buttonLayout;
39 QGridLayout *m_buttonLayout;
40
40
41 QGraphicsView *m_customView;
41 QGraphicsView *m_customView;
42 QGraphicsScene *m_customScene;
42 QGraphicsScene *m_customScene;
43 QGraphicsGridLayout *m_customLayout;
43 QGraphicsGridLayout *m_customLayout;
44
44
45
45
46 int m_setCount;
46 int m_setCount;
47 };
47 };
48
48
49 #endif // MAINWIDGET_H
49 #endif // MAINWIDGET_H
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