1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/******************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Charts module.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
******************************************************************************/
#include "view.h"
#include <QtGui/QResizeEvent>
#include <QtWidgets/QGraphicsScene>
#include <QtCharts/QChart>
#include <QtCharts/QLineSeries>
#include <QtCharts/QSplineSeries>
#include <QtWidgets/QGraphicsTextItem>
#include "callout.h"
#include <QtGui/QMouseEvent>
View::View(QWidget *parent)
: QGraphicsView(new QGraphicsScene, parent),
m_coordX(0),
m_coordY(0),
m_chart(0),
m_tooltip(0)
{
setDragMode(QGraphicsView::NoDrag);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
// chart
m_chart = new QChart;
m_chart->setMinimumSize(640, 480);
m_chart->setTitle("Hover the line to show callout. Click the line to make it stay");
m_chart->legend()->hide();
QLineSeries *series = new QLineSeries;
series->append(1, 3);
series->append(4, 5);
series->append(5, 4.5);
series->append(7, 1);
series->append(11, 2);
m_chart->addSeries(series);
QSplineSeries *series2 = new QSplineSeries;
series2->append(1.6, 1.4);
series2->append(2.4, 3.5);
series2->append(3.7, 2.5);
series2->append(7, 4);
series2->append(10, 2);
m_chart->addSeries(series2);
m_chart->createDefaultAxes();
m_chart->setAcceptHoverEvents(true);
setRenderHint(QPainter::Antialiasing);
scene()->addItem(m_chart);
m_coordX = new QGraphicsSimpleTextItem(m_chart);
m_coordX->setPos(m_chart->size().width()/2 - 50, m_chart->size().height());
m_coordX->setText("X: ");
m_coordY = new QGraphicsSimpleTextItem(m_chart);
m_coordY->setPos(m_chart->size().width()/2 + 50, m_chart->size().height());
m_coordY->setText("Y: ");
connect(series, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout()));
connect(series, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool)));
connect(series2, SIGNAL(clicked(QPointF)), this, SLOT(keepCallout()));
connect(series2, SIGNAL(hovered(QPointF, bool)), this, SLOT(tooltip(QPointF,bool)));
this->setMouseTracking(true);
}
void View::resizeEvent(QResizeEvent *event)
{
if (scene()) {
scene()->setSceneRect(QRect(QPoint(0, 0), event->size()));
m_chart->resize(event->size());
m_coordX->setPos(m_chart->size().width()/2 - 50, m_chart->size().height() - 20);
m_coordY->setPos(m_chart->size().width()/2 + 50, m_chart->size().height() - 20);
}
QGraphicsView::resizeEvent(event);
}
void View::mouseMoveEvent(QMouseEvent *event)
{
m_coordX->setText(QString("X: %1").arg(m_chart->mapToValue(event->pos()).x()));
m_coordY->setText(QString("Y: %1").arg(m_chart->mapToValue(event->pos()).y()));
QGraphicsView::mouseMoveEvent(event);
}
void View::keepCallout()
{
m_tooltip = new Callout(m_chart);
}
void View::tooltip(QPointF point, bool state)
{
if (m_tooltip == 0)
m_tooltip = new Callout(m_chart);
if (state) {
m_tooltip->setText(QString("X: %1 \nY: %2 ").arg(point.x()).arg(point.y()));
QXYSeries *series = qobject_cast<QXYSeries *>(sender());
m_tooltip->setAnchor(m_chart->mapToPosition(point, series));
m_tooltip->setPos(m_chart->mapToPosition(point, series) + QPoint(10, -50));
m_tooltip->setZValue(11);
m_tooltip->show();
} else {
m_tooltip->hide();
}
}
|
