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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "mainwidget.h"
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#include "dataseriedialog.h"
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#include <QtCharts/QChartView>
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#include <QtCharts/QPieSeries>
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#include <QtCharts/QScatterSeries>
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#include <QtCharts/QLineSeries>
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#include <QtCharts/QAreaSeries>
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#include <QtCharts/QSplineSeries>
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#include <QtCharts/QBarSet>
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#include <QtCharts/QBarSeries>
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#include <QtCharts/QStackedBarSeries>
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#include <QtCharts/QPercentBarSeries>
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#include <QtWidgets/QPushButton>
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#include <QtWidgets/QComboBox>
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#include <QtWidgets/QSpinBox>
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#include <QtWidgets/QCheckBox>
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#include <QtWidgets/QGridLayout>
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#include <QtWidgets/QHBoxLayout>
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#include <QtWidgets/QLabel>
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#include <QtWidgets/QSpacerItem>
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#include <QtWidgets/QMessageBox>
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#include <cmath>
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#include <QtCore/QDebug>
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#include <QtGui/QStandardItemModel>
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#include <QtCharts/QBarCategoryAxis>
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#include <QtWidgets/QOpenGLWidget>
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QT_CHARTS_USE_NAMESPACE
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MainWidget::MainWidget(QWidget *parent) :
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QWidget(parent),
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m_addSerieDialog(0),
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m_chart(0)
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{
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m_chart = new QChart();
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// Grid layout for the controls for configuring the chart widget
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QGridLayout *grid = new QGridLayout();
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QPushButton *addSeriesButton = new QPushButton("Add series");
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connect(addSeriesButton, SIGNAL(clicked()), this, SLOT(addSeries()));
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grid->addWidget(addSeriesButton, 0, 1);
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initBackroundCombo(grid);
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initScaleControls(grid);
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initThemeCombo(grid);
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initCheckboxes(grid);
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// add row with empty label to make all the other rows static
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grid->addWidget(new QLabel(""), grid->rowCount(), 0);
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grid->setRowStretch(grid->rowCount() - 1, 1);
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// Create chart view with the chart
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m_chartView = new QChartView(m_chart, this);
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m_chartView->setRubberBand(QChartView::HorizontalRubberBand);
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// Another grid layout as a main layout
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QGridLayout *mainLayout = new QGridLayout();
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mainLayout->addLayout(grid, 0, 0);
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mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
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setLayout(mainLayout);
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}
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// Combo box for selecting the chart's background
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void MainWidget::initBackroundCombo(QGridLayout *grid)
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{
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QComboBox *backgroundCombo = new QComboBox(this);
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backgroundCombo->addItem("Color");
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backgroundCombo->addItem("Gradient");
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backgroundCombo->addItem("Image");
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connect(backgroundCombo, SIGNAL(currentIndexChanged(int)),
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this, SLOT(backgroundChanged(int)));
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grid->addWidget(new QLabel("Background:"), grid->rowCount(), 0);
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grid->addWidget(backgroundCombo, grid->rowCount() - 1, 1);
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}
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// Scale related controls (auto-scale vs. manual min-max values)
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void MainWidget::initScaleControls(QGridLayout *grid)
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{
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m_autoScaleCheck = new QCheckBox("Automatic scaling");
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connect(m_autoScaleCheck, SIGNAL(stateChanged(int)), this, SLOT(autoScaleChanged(int)));
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// Allow setting also non-sense values (like -2147483648 and 2147483647)
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m_xMinSpin = new QSpinBox();
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m_xMinSpin->setMinimum(INT_MIN);
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m_xMinSpin->setMaximum(INT_MAX);
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m_xMinSpin->setValue(0);
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connect(m_xMinSpin, SIGNAL(valueChanged(int)), this, SLOT(xMinChanged(int)));
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m_xMaxSpin = new QSpinBox();
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m_xMaxSpin->setMinimum(INT_MIN);
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m_xMaxSpin->setMaximum(INT_MAX);
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m_xMaxSpin->setValue(10);
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connect(m_xMaxSpin, SIGNAL(valueChanged(int)), this, SLOT(xMaxChanged(int)));
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m_yMinSpin = new QSpinBox();
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m_yMinSpin->setMinimum(INT_MIN);
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m_yMinSpin->setMaximum(INT_MAX);
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m_yMinSpin->setValue(0);
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connect(m_yMinSpin, SIGNAL(valueChanged(int)), this, SLOT(yMinChanged(int)));
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m_yMaxSpin = new QSpinBox();
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m_yMaxSpin->setMinimum(INT_MIN);
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m_yMaxSpin->setMaximum(INT_MAX);
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m_yMaxSpin->setValue(10);
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connect(m_yMaxSpin, SIGNAL(valueChanged(int)), this, SLOT(yMaxChanged(int)));
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grid->addWidget(m_autoScaleCheck, grid->rowCount(), 0);
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grid->addWidget(new QLabel("x min:"), grid->rowCount(), 0);
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grid->addWidget(m_xMinSpin, grid->rowCount() - 1, 1);
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grid->addWidget(new QLabel("x max:"), grid->rowCount(), 0);
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grid->addWidget(m_xMaxSpin, grid->rowCount() - 1, 1);
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grid->addWidget(new QLabel("y min:"), grid->rowCount(), 0);
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grid->addWidget(m_yMinSpin, grid->rowCount() - 1, 1);
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grid->addWidget(new QLabel("y max:"), grid->rowCount(), 0);
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grid->addWidget(m_yMaxSpin, grid->rowCount() - 1, 1);
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m_autoScaleCheck->setChecked(true);
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}
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// Combo box for selecting theme
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void MainWidget::initThemeCombo(QGridLayout *grid)
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{
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QComboBox *chartTheme = new QComboBox();
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chartTheme->addItem("Default");
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chartTheme->addItem("Light");
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chartTheme->addItem("Blue Cerulean");
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chartTheme->addItem("Dark");
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chartTheme->addItem("Brown Sand");
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chartTheme->addItem("Blue NCS");
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chartTheme->addItem("High Contrast");
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chartTheme->addItem("Blue Icy");
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chartTheme->addItem("Qt");
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connect(chartTheme, SIGNAL(currentIndexChanged(int)),
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this, SLOT(changeChartTheme(int)));
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grid->addWidget(new QLabel("Chart theme:"), 8, 0);
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grid->addWidget(chartTheme, 8, 1);
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}
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// Different check boxes for customizing chart
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void MainWidget::initCheckboxes(QGridLayout *grid)
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{
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// TODO: setZoomEnabled slot has been removed from QChartView -> Re-implement zoom on/off
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QCheckBox *zoomCheckBox = new QCheckBox("Drag'n drop Zoom");
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// connect(zoomCheckBox, SIGNAL(toggled(bool)), m_chartView, SLOT(setZoomEnabled(bool)));
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zoomCheckBox->setChecked(true);
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grid->addWidget(zoomCheckBox, grid->rowCount(), 0);
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QCheckBox *aliasCheckBox = new QCheckBox("Anti-alias");
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connect(aliasCheckBox, SIGNAL(toggled(bool)), this, SLOT(antiAliasToggled(bool)));
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aliasCheckBox->setChecked(false);
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grid->addWidget(aliasCheckBox, grid->rowCount(), 0);
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QCheckBox *openGLCheckBox = new QCheckBox("Use QOpenGLWidget");
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connect(openGLCheckBox, SIGNAL(toggled(bool)), this, SLOT(openGLToggled(bool)));
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openGLCheckBox->setChecked(false);
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grid->addWidget(openGLCheckBox, grid->rowCount(), 0);
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}
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void MainWidget::antiAliasToggled(bool enabled)
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{
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m_chartView->setRenderHint(QPainter::Antialiasing, enabled);
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}
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void MainWidget::openGLToggled(bool enabled)
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{
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if (enabled) {
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QSurfaceFormat f = QSurfaceFormat::defaultFormat();
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f.setSamples(4);
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QSurfaceFormat::setDefaultFormat(f);
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QOpenGLWidget *g = new QOpenGLWidget();
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m_chartView->setViewport(g);
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} else {
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m_chartView->setViewport(0);
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}
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}
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void MainWidget::addSeries()
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{
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if (!m_addSerieDialog) {
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m_addSerieDialog = new DataSerieDialog(this);
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connect(m_addSerieDialog, SIGNAL(accepted(QString,int,int,QString,bool)),
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this, SLOT(addSeries(QString,int,int,QString,bool)));
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}
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m_addSerieDialog->exec();
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}
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QList<RealList> MainWidget::generateTestData(int columnCount, int rowCount, QString dataCharacteristics)
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{
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QList<RealList> testData;
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for (int j(0); j < columnCount; j++) {
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QList <qreal> newColumn;
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for (int i(0); i < rowCount; i++) {
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if (dataCharacteristics == "Sin") {
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newColumn.append(std::abs(sin(3.14159265358979 / 50 * i) * 100));
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} else if (dataCharacteristics == "Sin + random") {
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newColumn.append(std::abs(sin(3.14159265358979 / 50 * i) * 100) + (rand() % 5));
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} else if (dataCharacteristics == "Random") {
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newColumn.append(rand() % 10 + (qreal) rand() / (qreal) RAND_MAX);
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} else if (dataCharacteristics == "Linear") {
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//newColumn.append(i * (j + 1.0));
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// TODO: temporary hack to make pie work; prevent zero values:
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newColumn.append(i * (j + 1.0) + 0.1);
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} else { // "constant"
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newColumn.append((j + 1.0));
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}
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}
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testData.append(newColumn);
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}
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return testData;
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}
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QStringList MainWidget::generateLabels(int count)
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{
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QStringList result;
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for (int i(0); i < count; i++)
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result.append("label" + QString::number(i));
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return result;
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}
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void MainWidget::addSeries(QString seriesName, int columnCount, int rowCount, QString dataCharacteristics, bool labelsEnabled)
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{
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qDebug() << "addSeries: " << seriesName
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<< " columnCount: " << columnCount
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<< " rowCount: " << rowCount
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<< " dataCharacteristics: " << dataCharacteristics
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<< " labels enabled: " << labelsEnabled;
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m_defaultSeriesName = seriesName;
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QList<RealList> data = generateTestData(columnCount, rowCount, dataCharacteristics);
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// Line series and scatter series use similar data
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if (seriesName == "Line") {
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for (int j(0); j < data.count(); j ++) {
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QList<qreal> column = data.at(j);
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QLineSeries *series = new QLineSeries();
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series->setName("line" + QString::number(j));
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for (int i(0); i < column.count(); i++)
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series->append(i, column.at(i));
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m_chart->addSeries(series);
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}
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} else if (seriesName == "Area") {
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// TODO: lower series for the area?
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for (int j(0); j < data.count(); j ++) {
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QList<qreal> column = data.at(j);
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QLineSeries *lineSeries = new QLineSeries();
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for (int i(0); i < column.count(); i++)
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lineSeries->append(i, column.at(i));
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QAreaSeries *areaSeries = new QAreaSeries(lineSeries);
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areaSeries->setName("area" + QString::number(j));
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m_chart->addSeries(areaSeries);
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}
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} else if (seriesName == "Scatter") {
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for (int j(0); j < data.count(); j++) {
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QList<qreal> column = data.at(j);
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QScatterSeries *series = new QScatterSeries();
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series->setName("scatter" + QString::number(j));
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for (int i(0); i < column.count(); i++)
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series->append(i, column.at(i));
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m_chart->addSeries(series);
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}
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} else if (seriesName == "Pie") {
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QStringList labels = generateLabels(rowCount);
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for (int j(0); j < data.count(); j++) {
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QPieSeries *series = new QPieSeries();
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QList<qreal> column = data.at(j);
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for (int i(0); i < column.count(); i++)
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series->append(labels.at(i), column.at(i));
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m_chart->addSeries(series);
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}
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} else if (seriesName == "Bar"
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|| seriesName == "Stacked bar"
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|| seriesName == "Percent bar") {
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QStringList category;
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QStringList labels = generateLabels(rowCount);
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foreach (QString label, labels)
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category << label;
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QAbstractBarSeries* series = 0;
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if (seriesName == "Bar") {
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series = new QBarSeries(this);
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QBarCategoryAxis* axis = new QBarCategoryAxis();
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axis->append(category);
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m_chart->setAxisX(axis,series);
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} else if (seriesName == "Stacked bar") {
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series = new QStackedBarSeries(this);
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QBarCategoryAxis* axis = new QBarCategoryAxis();
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axis->append(category);
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m_chart->setAxisX(axis,series);
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} else {
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series = new QPercentBarSeries(this);
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QBarCategoryAxis* axis = new QBarCategoryAxis();
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axis->append(category);
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m_chart->setAxisX(axis,series);
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}
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for (int j(0); j < data.count(); j++) {
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QList<qreal> column = data.at(j);
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QBarSet *set = new QBarSet("set" + QString::number(j));
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for (int i(0); i < column.count(); i++)
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*set << column.at(i);
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series->append(set);
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}
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m_chart->addSeries(series);
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} else if (seriesName == "Spline") {
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for (int j(0); j < data.count(); j ++) {
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QList<qreal> column = data.at(j);
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QSplineSeries *series = new QSplineSeries();
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series->setName("spline" + QString::number(j));
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for (int i(0); i < column.count(); i++)
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series->append(i, column.at(i));
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m_chart->addSeries(series);
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}
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}
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m_chart->createDefaultAxes();
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}
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void MainWidget::backgroundChanged(int itemIndex)
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{
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qDebug() << "backgroundChanged: " << itemIndex;
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}
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void MainWidget::autoScaleChanged(int value)
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{
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if (value) {
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// TODO: enable auto scaling
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} else {
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// TODO: set scaling manually (and disable auto scaling)
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}
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m_xMinSpin->setEnabled(!value);
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m_xMaxSpin->setEnabled(!value);
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m_yMinSpin->setEnabled(!value);
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m_yMaxSpin->setEnabled(!value);
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}
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void MainWidget::xMinChanged(int value)
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{
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qDebug() << "xMinChanged: " << value;
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}
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void MainWidget::xMaxChanged(int value)
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{
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qDebug() << "xMaxChanged: " << value;
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}
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void MainWidget::yMinChanged(int value)
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{
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qDebug() << "yMinChanged: " << value;
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}
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void MainWidget::yMaxChanged(int value)
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{
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qDebug() << "yMaxChanged: " << value;
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}
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void MainWidget::changeChartTheme(int themeIndex)
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{
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qDebug() << "changeChartTheme: " << themeIndex;
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if (themeIndex == 0)
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m_chart->setTheme(QChart::ChartThemeLight);
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else
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m_chart->setTheme((QChart::ChartTheme) (themeIndex - 1));
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}
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