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
|
/**
* 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 "AdjustedCartesianAxis.h"
#include <KChartCartesianCoordinatePlane>
#include <KChartChart>
#include <KChartGridAttributes>
#include <KChartLegend>
#include <KChartLineDiagram>
#include <KChartTextAttributes>
#include <QDebug>
#include <QLinearGradient>
#include <QTextDocument>
MainWindow::MainWindow( QWidget* parent ) :
QWidget( parent )
{
setupUi( this );
QHBoxLayout* chartLayout = new QHBoxLayout( m_chartFrame );
m_chart = new KChart::Chart;
chartLayout->addWidget( m_chart );
m_model.loadFromCSV( ":/data" );
// Set up the diagram
m_lines = new KChart::LineDiagram();
m_lines->setModel( &m_model );
m_xAxis = new KChart::CartesianAxis( m_lines );
KChart::TextAttributes ta( m_xAxis->textAttributes() );
AdjustedCartesianAxis *yAxis = new AdjustedCartesianAxis( m_lines );
yAxis->setBounds( 3, 6 );
m_xAxis->setPosition( KChart::CartesianAxis::Bottom );
yAxis->setPosition( KChart::CartesianAxis::Left );
// set the following to 0, to see the default Abscissa labels (== X headers, as read from the data file)
#if 1
QStringList daysOfWeek;
daysOfWeek << "Monday" << "Tuesday" << "Wednesday" << "Thursday" << "Friday" << "Saturday" << "Sunday";
m_xAxis->setLabels( daysOfWeek );
//QStringList shortDays;
//shortDays << "Mon" << "Tue" << "Wed" << "Thu" << "Fri" << "Sat" << "Sun";
//m_xAxis->setShortLabels( shortDays );
#endif
// Use HTML for drawing the text in the axis labels.
#if 0
QStringList htmlStyles;
htmlStyles << "<b>Bold</b>" << "<i>Italic</i>" << "<u>Underline</u>" << "<font color='red'>Red</font>";
m_xAxis->setLabels( htmlStyles );
ta.setTextDocument(new QTextDocument);
#endif
// Illustration of custom ticks
QList<qreal> ticks;
ticks.append( 0.5 );
ticks.append( 3.5 );
ticks.append( 4.2 );
ticks.append( 6.5 );
m_xAxis->setCustomTicks(ticks);
yAxis->setCustomTicks(ticks);
// rotate abscissa labels by -60 degrees:
ta.setRotation( -60 );
m_xAxis->setTextAttributes( ta );
m_lines->addAxis( m_xAxis );
m_lines->addAxis( yAxis );
m_chart->coordinatePlane()->replaceDiagram( m_lines );
// Set up the legend
m_xAxis->setCustomTickLength( 11 );
yAxis->setCustomTickLength( 11 );
m_legend = new KChart::Legend( m_lines, m_chart );
m_legend->setPosition( KChart::Position::East );
m_legend->setAlignment( Qt::AlignTop );
m_chart->addLegend( m_legend );
connect( m_annotations, SIGNAL(toggled(bool)), SLOT(annotationsToggled(bool)) );
connect( m_linesOnAnnotations, SIGNAL(toggled(bool)), SLOT(gridLinesOnAnnotationsToggled(bool)) );
}
void MainWindow::annotationsToggled( bool showAnnotations )
{
QMap< qreal, QString > annotations;
if ( showAnnotations ) {
// set custom axis labels at custom positions
annotations[ 0.5 ] = "Left";
annotations[ 3.5 ] = "Center";
annotations[ 4.2 ] = "Off Center";
annotations[ 6.5 ] = "Right";
}
m_xAxis->setAnnotations( annotations );
m_chart->update();
}
void MainWindow::gridLinesOnAnnotationsToggled( bool onAnnotations )
{
// Draw grid lines where the annotations are
KChart::CartesianCoordinatePlane* plane =
static_cast< KChart::CartesianCoordinatePlane* >( m_chart->coordinatePlane() );
KChart::GridAttributes ga = plane->gridAttributes( Qt::Horizontal );
ga.setLinesOnAnnotations( onAnnotations );
plane->setGridAttributes( Qt::Horizontal, ga );
m_chart->update();
}
|
