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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt 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 Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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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 <QChart>
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#include <QChartView>
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#include <QPushButton>
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#include <QLabel>
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#include <QDebug>
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#include <QLegend>
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#include <QFormLayout>
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#include <QPieSeries>
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#include <QPieSlice>
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#include <QLegendMarker>
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QTCOMMERCIALCHART_USE_NAMESPACE
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MainWidget::MainWidget(QWidget *parent) :
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QWidget(parent)
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{
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// Create buttons for ui
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m_buttonLayout = new QGridLayout();
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QPushButton *detachLegendButton = new QPushButton("Toggle attached");
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connect(detachLegendButton, SIGNAL(clicked()), this, SLOT(toggleAttached()));
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m_buttonLayout->addWidget(detachLegendButton, 0, 0);
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QPushButton *addSliceButton = new QPushButton("add slice");
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connect(addSliceButton, SIGNAL(clicked()), this, SLOT(addSlice()));
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m_buttonLayout->addWidget(addSliceButton, 2, 0);
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QPushButton *removeSliceButton = new QPushButton("remove slice");
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connect(removeSliceButton, SIGNAL(clicked()), this, SLOT(removeSlice()));
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m_buttonLayout->addWidget(removeSliceButton, 3, 0);
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QPushButton *alignButton = new QPushButton("Align (Bottom)");
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connect(alignButton, SIGNAL(clicked()), this, SLOT(setLegendAlignment()));
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m_buttonLayout->addWidget(alignButton, 4, 0);
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QPushButton *boldButton = new QPushButton("Toggle bold");
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connect(boldButton, SIGNAL(clicked()), this, SLOT(toggleBold()));
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m_buttonLayout->addWidget(boldButton, 5, 0);
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QPushButton *italicButton = new QPushButton("Toggle italic");
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connect(italicButton, SIGNAL(clicked()), this, SLOT(toggleItalic()));
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m_buttonLayout->addWidget(italicButton, 6, 0);
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QPushButton *infoButton = new QPushButton("Debug info");
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connect(infoButton, SIGNAL(clicked()), this, SLOT(showDebugInfo()));
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m_buttonLayout->addWidget(infoButton, 7, 0);
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QPushButton *connectButton = new QPushButton("Connect markers");
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connect(connectButton, SIGNAL(clicked()), this, SLOT(connectMarkers()));
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m_buttonLayout->addWidget(connectButton, 8, 0);
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QPushButton *disConnectButton = new QPushButton("Disconnect markers");
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connect(disConnectButton, SIGNAL(clicked()), this, SLOT(disconnectMarkers()));
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m_buttonLayout->addWidget(disConnectButton, 9, 0);
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m_legendPosX = new QDoubleSpinBox();
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m_legendPosY = new QDoubleSpinBox();
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m_legendWidth = new QDoubleSpinBox();
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m_legendHeight = new QDoubleSpinBox();
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connect(m_legendPosX, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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connect(m_legendPosY, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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connect(m_legendWidth, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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connect(m_legendHeight, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
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QFormLayout* legendLayout = new QFormLayout();
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legendLayout->addRow("HPos", m_legendPosX);
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legendLayout->addRow("VPos", m_legendPosY);
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legendLayout->addRow("Width", m_legendWidth);
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legendLayout->addRow("Height", m_legendHeight);
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m_legendSettings = new QGroupBox("Detached legend");
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m_legendSettings->setLayout(legendLayout);
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m_buttonLayout->addWidget(m_legendSettings);
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m_legendSettings->setVisible(false);
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// Create chart view with the chart
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m_chart = new QChart();
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m_chartView = new QChartView(m_chart, this);
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// Create spinbox to modify font size
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m_fontSize = new QDoubleSpinBox();
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m_fontSize->setValue(m_chart->legend()->font().pointSizeF());
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connect(m_fontSize, SIGNAL(valueChanged(double)), this, SLOT(fontSizeChanged()));
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QFormLayout* fontLayout = new QFormLayout();
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fontLayout->addRow("Legend font size", m_fontSize);
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// Create layout for grid and detached legend
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m_mainLayout = new QGridLayout();
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m_mainLayout->addLayout(m_buttonLayout, 0, 0);
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m_mainLayout->addLayout(fontLayout,1,0);
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m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
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setLayout(m_mainLayout);
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createSeries();
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}
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void MainWidget::createSeries()
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{
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m_series = new QPieSeries();
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addSlice();
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addSlice();
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addSlice();
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addSlice();
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m_chart->addSeries(m_series);
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m_chart->setTitle("Legend detach example");
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m_chart->createDefaultAxes();
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//![1]
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m_chart->legend()->setVisible(true);
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m_chart->legend()->setAlignment(Qt::AlignBottom);
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//![1]
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m_chartView->setRenderHint(QPainter::Antialiasing);
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}
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void MainWidget::showLegendSpinbox()
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{
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m_legendSettings->setVisible(true);
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QRectF chartViewRect = m_chartView->rect();
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m_legendPosX->setMinimum(0);
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m_legendPosX->setMaximum(chartViewRect.width());
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m_legendPosX->setValue(150);
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m_legendPosY->setMinimum(0);
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m_legendPosY->setMaximum(chartViewRect.height());
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m_legendPosY->setValue(150);
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m_legendWidth->setMinimum(0);
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m_legendWidth->setMaximum(chartViewRect.width());
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m_legendWidth->setValue(150);
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m_legendHeight->setMinimum(0);
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m_legendHeight->setMaximum(chartViewRect.height());
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m_legendHeight->setValue(75);
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}
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void MainWidget::hideLegendSpinbox()
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{
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m_legendSettings->setVisible(false);
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}
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void MainWidget::toggleAttached()
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{
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QLegend *legend = m_chart->legend();
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if (legend->isAttachedToChart()) {
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//![2]
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legend->detachFromChart();
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m_chart->legend()->setBackgroundVisible(true);
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m_chart->legend()->setBrush(QBrush(QColor(128,128,128,128)));
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m_chart->legend()->setPen(QPen(QColor(192,192,192,192)));
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//![2]
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showLegendSpinbox();
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updateLegendLayout();
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} else {
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//![3]
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legend->attachToChart();
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legend->setBackgroundVisible(false);
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//![3]
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hideLegendSpinbox();
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}
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update();
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}
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void MainWidget::addSlice()
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{
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QPieSlice* slice = new QPieSlice(QString("slice " + QString::number(m_series->count())), m_series->count()+1);
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m_series->append(slice);
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}
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void MainWidget::removeSlice()
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{
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QList<QPieSlice*> slices = m_series->slices();
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if (slices.count() > 0) {
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m_series->remove(slices.at(slices.count()-1));
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}
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}
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void MainWidget::connectMarkers()
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{
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// Example use case.
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// Explode slice via marker.
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// Should be doable via public api.
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foreach (QLegendMarker* marker, m_chart->legend()->markers()) {
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// Disconnect possible existing connection to avoid multiple connections
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QObject::disconnect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked()));
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QObject::connect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked()));
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}
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}
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void MainWidget::disconnectMarkers()
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{
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foreach (QLegendMarker* marker, m_chart->legend()->markers()) {
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QObject::disconnect(marker, SIGNAL(clicked()), this, SLOT(handleMarkerClicked()));
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}
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}
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void MainWidget::setLegendAlignment()
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{
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QPushButton *button = qobject_cast<QPushButton *>(sender());
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switch (m_chart->legend()->alignment()) {
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case Qt::AlignTop:
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m_chart->legend()->setAlignment(Qt::AlignLeft);
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if (button)
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button->setText("Align (Left)");
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break;
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case Qt::AlignLeft:
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m_chart->legend()->setAlignment(Qt::AlignBottom);
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if (button)
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button->setText("Align (Bottom)");
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break;
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case Qt::AlignBottom:
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m_chart->legend()->setAlignment(Qt::AlignRight);
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if (button)
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button->setText("Align (Right)");
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break;
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default:
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if (button)
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button->setText("Align (Top)");
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m_chart->legend()->setAlignment(Qt::AlignTop);
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break;
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}
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}
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void MainWidget::toggleBold()
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{
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QFont font = m_chart->legend()->font();
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font.setBold(!font.bold());
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m_chart->legend()->setFont(font);
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}
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void MainWidget::toggleItalic()
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{
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QFont font = m_chart->legend()->font();
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font.setItalic(!font.italic());
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m_chart->legend()->setFont(font);
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}
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void MainWidget::showDebugInfo()
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{
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qDebug() << "marker count:" << m_chart->legend()->markers().count();
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foreach (QLegendMarker* marker, m_chart->legend()->markers()) {
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qDebug() << "marker series type:" << marker->series()->type();
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qDebug() << "peer object:" << marker->peerObject();
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qDebug() << "label:" << marker->label();
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}
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}
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void MainWidget::fontSizeChanged()
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{
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QFont font = m_chart->legend()->font();
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font.setPointSizeF(m_fontSize->value());
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m_chart->legend()->setFont(font);
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}
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void MainWidget::updateLegendLayout()
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{
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//![4]
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m_chart->legend()->setGeometry(QRectF(m_legendPosX->value()
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,m_legendPosY->value()
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,m_legendWidth->value()
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,m_legendHeight->value()));
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m_chart->legend()->update();
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//![4]
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}
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void MainWidget::handleMarkerClicked()
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{
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QLegendMarker* marker = qobject_cast<QLegendMarker*> (sender());
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qDebug() << "marker clicked:" << marker;
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QPieSlice* slice = qobject_cast<QPieSlice*> (marker->peerObject());
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Q_ASSERT(slice);
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slice->setExploded(!slice->isExploded());
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}
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