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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/**
* SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
*
* This file is part of the KD Chart library.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "mainwindow.h"
#include <KChartChart>
#include <KChartPlotter>
#include <KChartDataValueAttributes>
#include <KChartTextAttributes>
#include <KChartMarkerAttributes>
#include <QStandardItemModel>
#include <QTimer>
using namespace KChart;
static const int nBubbles = 7;
// we display seven bubbles using the following data structure:
// 0: Y
// 1: X
// 2: size
struct DataType{
DataType( qreal x_,
qreal y_,
qreal size_ )
: x(x_)
, y(y_)
, size(size_)
{}
qreal x;
qreal y;
qreal size;
};
static const DataType bubblesData[nBubbles] = {
DataType(0.5, 1.0, 100),
DataType(1.0, 0.5, 60 ),
DataType(1.6, 2.0, 28 ),
DataType(0.7, 0.3, 55 ),
DataType(1.3, 2.0, 95 ),
DataType(2.0, 1.0, 75 ),
DataType(1.4, 1.1, 85 )
};
#define ROLE_SIZE Qt::UserRole + 1
MainWindow::MainWindow( QWidget* parent ) :
QWidget( parent ),
m_model(nullptr)
{
setupUi( this );
QHBoxLayout* chartLayout = new QHBoxLayout( chartFrame );
m_chart = new Chart();
chartLayout->addWidget( m_chart );
// Set up the data
initializeDataModel();
// Set up the diagram
m_plotter = new Plotter();
// Register the data model at the diagram
m_plotter->setModel( m_model );
// Add axes to the diagram
CartesianAxis *xAxis = new CartesianAxis( m_plotter );
CartesianAxis *xAxis2 = new CartesianAxis( m_plotter );
CartesianAxis *yAxis = new CartesianAxis ( m_plotter );
CartesianAxis *yAxis2 = new CartesianAxis ( m_plotter );
xAxis->setPosition ( KChart::CartesianAxis::Bottom );
xAxis2->setPosition( KChart::CartesianAxis::Top );
yAxis->setPosition ( KChart::CartesianAxis::Left );
yAxis2->setPosition( KChart::CartesianAxis::Right );
m_plotter->addAxis( xAxis );
m_plotter->addAxis( xAxis2 );
m_plotter->addAxis( yAxis );
m_plotter->addAxis( yAxis2 );
connect( threeDEnabled, SIGNAL(toggled(bool)), this, SLOT(setMarkerAttributes()) );
m_chart->coordinatePlane()->replaceDiagram( m_plotter );
m_chart->setGlobalLeading( 20, 20, 20, 20 );
setMarkerAttributes();
}
void MainWindow::initializeDataModel()
{
m_model = new QStandardItemModel( nBubbles, 2 );
m_model->setHeaderData(0, Qt::Horizontal, tr("Some Bubbles"));
for ( int i=0; i < nBubbles; ++i ) {
const QModelIndex indexX = m_model->index(i, 0);
const QModelIndex indexY = m_model->index(i, 1);
m_model->setData(indexX, QVariant( bubblesData[i].x ), Qt::DisplayRole);
m_model->setData(indexY, QVariant( bubblesData[i].y ), Qt::DisplayRole);
m_model->setData(indexY, bubblesData[i].size, ROLE_SIZE );
}
}
void MainWindow::setMarkerAttributes()
{
// disable the connecting line
KChart::LineAttributes la = m_plotter->lineAttributes();
la.setVisible(false);
m_plotter->setLineAttributes(la);
for ( int iRow = 0; iRow<nBubbles; ++iRow ) {
const QModelIndex indexX = m_plotter->model()->index(iRow, 0);
const QModelIndex indexY = m_plotter->model()->index(iRow, 1);
DataValueAttributes dva( m_plotter->dataValueAttributes( indexX ) );
dva.setVisible( true );
TextAttributes ta( dva.textAttributes() );
ta.setVisible( false );
MarkerAttributes ma( dva.markerAttributes() );
ma.setVisible( true );
ma.setMarkerStyle( MarkerAttributes::MarkerCircle );
ma.setThreeD( threeDEnabled->isChecked() );
// set the size
const qreal d = m_model->data( indexY, ROLE_SIZE ).toReal();
ma.setMarkerSize( QSizeF(d,d) );
RelativePosition pos( dva.positivePosition() );
pos.setAlignment( Qt::AlignCenter );
pos.setHorizontalPadding(0);
dva.setPositivePosition( pos );
dva.setMarkerAttributes( ma );
dva.setTextAttributes( ta );
// note: The KChart::Plotter looks at the X cell
// for data value attributes,
// any attrs set at the Y cell are ignored.
m_plotter->setDataValueAttributes( indexX, dva );
}
m_chart->update();
}
|
