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-rw-r--r--examples/charts/legend/mainwidget.cpp247
1 files changed, 247 insertions, 0 deletions
diff --git a/examples/charts/legend/mainwidget.cpp b/examples/charts/legend/mainwidget.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mainwidget.h"
+#include <QChart>
+#include <QChartView>
+#include <QPushButton>
+#include <QLabel>
+#include <QDebug>
+#include <QBarSet>
+#include <QBarSeries>
+#include <QLegend>
+#include <QFormLayout>
+
+QT_CHARTS_USE_NAMESPACE
+
+MainWidget::MainWidget(QWidget *parent) :
+ QWidget(parent)
+{
+ // Create buttons for ui
+ m_buttonLayout = new QGridLayout();
+ QPushButton *detachLegendButton = new QPushButton("Toggle attached");
+ connect(detachLegendButton, SIGNAL(clicked()), this, SLOT(toggleAttached()));
+ m_buttonLayout->addWidget(detachLegendButton, 0, 0);
+
+ QPushButton *addSetButton = new QPushButton("add barset");
+ connect(addSetButton, SIGNAL(clicked()), this, SLOT(addBarset()));
+ m_buttonLayout->addWidget(addSetButton, 2, 0);
+ QPushButton *removeBarsetButton = new QPushButton("remove barset");
+ connect(removeBarsetButton, SIGNAL(clicked()), this, SLOT(removeBarset()));
+ m_buttonLayout->addWidget(removeBarsetButton, 3, 0);
+
+ QPushButton *alignButton = new QPushButton("Align (Bottom)");
+ connect(alignButton, SIGNAL(clicked()), this, SLOT(setLegendAlignment()));
+ m_buttonLayout->addWidget(alignButton, 4, 0);
+
+ QPushButton *boldButton = new QPushButton("Toggle bold");
+ connect(boldButton, SIGNAL(clicked()), this, SLOT(toggleBold()));
+ m_buttonLayout->addWidget(boldButton, 8, 0);
+
+ QPushButton *italicButton = new QPushButton("Toggle italic");
+ connect(italicButton, SIGNAL(clicked()), this, SLOT(toggleItalic()));
+ m_buttonLayout->addWidget(italicButton, 9, 0);
+
+ m_legendPosX = new QDoubleSpinBox();
+ m_legendPosY = new QDoubleSpinBox();
+ m_legendWidth = new QDoubleSpinBox();
+ m_legendHeight = new QDoubleSpinBox();
+
+ connect(m_legendPosX, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
+ connect(m_legendPosY, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
+ connect(m_legendWidth, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
+ connect(m_legendHeight, SIGNAL(valueChanged(double)), this, SLOT(updateLegendLayout()));
+
+ QFormLayout *legendLayout = new QFormLayout();
+ legendLayout->addRow("HPos", m_legendPosX);
+ legendLayout->addRow("VPos", m_legendPosY);
+ legendLayout->addRow("Width", m_legendWidth);
+ legendLayout->addRow("Height", m_legendHeight);
+ m_legendSettings = new QGroupBox("Detached legend");
+ m_legendSettings->setLayout(legendLayout);
+ m_buttonLayout->addWidget(m_legendSettings);
+ m_legendSettings->setVisible(false);
+
+ // Create chart view with the chart
+ m_chart = new QChart();
+ m_chartView = new QChartView(m_chart, this);
+
+ // Create spinbox to modify font size
+ m_fontSize = new QDoubleSpinBox();
+ m_fontSize->setValue(m_chart->legend()->font().pointSizeF());
+ connect(m_fontSize, SIGNAL(valueChanged(double)), this, SLOT(fontSizeChanged()));
+
+ QFormLayout *fontLayout = new QFormLayout();
+ fontLayout->addRow("Legend font size", m_fontSize);
+
+ // Create layout for grid and detached legend
+ m_mainLayout = new QGridLayout();
+ m_mainLayout->addLayout(m_buttonLayout, 0, 0);
+ m_mainLayout->addLayout(fontLayout, 1, 0);
+ m_mainLayout->addWidget(m_chartView, 0, 1, 3, 1);
+ setLayout(m_mainLayout);
+
+ createSeries();
+}
+
+void MainWidget::createSeries()
+{
+ m_series = new QBarSeries();
+ addBarset();
+ addBarset();
+ addBarset();
+ addBarset();
+
+ m_chart->addSeries(m_series);
+ m_chart->setTitle("Legend detach example");
+ m_chart->createDefaultAxes();
+//![1]
+ m_chart->legend()->setVisible(true);
+ m_chart->legend()->setAlignment(Qt::AlignBottom);
+//![1]
+
+ m_chartView->setRenderHint(QPainter::Antialiasing);
+}
+
+void MainWidget::showLegendSpinbox()
+{
+ m_legendSettings->setVisible(true);
+ QRectF chartViewRect = m_chartView->rect();
+
+ m_legendPosX->setMinimum(0);
+ m_legendPosX->setMaximum(chartViewRect.width());
+ m_legendPosX->setValue(150);
+
+ m_legendPosY->setMinimum(0);
+ m_legendPosY->setMaximum(chartViewRect.height());
+ m_legendPosY->setValue(150);
+
+ m_legendWidth->setMinimum(0);
+ m_legendWidth->setMaximum(chartViewRect.width());
+ m_legendWidth->setValue(150);
+
+ m_legendHeight->setMinimum(0);
+ m_legendHeight->setMaximum(chartViewRect.height());
+ m_legendHeight->setValue(75);
+}
+
+void MainWidget::hideLegendSpinbox()
+{
+ m_legendSettings->setVisible(false);
+}
+
+
+void MainWidget::toggleAttached()
+{
+ QLegend *legend = m_chart->legend();
+ if (legend->isAttachedToChart()) {
+ //![2]
+ legend->detachFromChart();
+ m_chart->legend()->setBackgroundVisible(true);
+ m_chart->legend()->setBrush(QBrush(QColor(128, 128, 128, 128)));
+ m_chart->legend()->setPen(QPen(QColor(192, 192, 192, 192)));
+ //![2]
+ showLegendSpinbox();
+ updateLegendLayout();
+ } else {
+ //![3]
+ legend->attachToChart();
+ legend->setBackgroundVisible(false);
+ //![3]
+ hideLegendSpinbox();
+ }
+ update();
+}
+
+void MainWidget::addBarset()
+{
+ QBarSet *barSet = new QBarSet(QString("set ") + QString::number(m_series->count()));
+ qreal delta = m_series->count() * 0.1;
+ *barSet << 1 + delta << 2 + delta << 3 + delta << 4 + delta;
+ m_series->append(barSet);
+}
+
+void MainWidget::removeBarset()
+{
+ QList<QBarSet *> sets = m_series->barSets();
+ if (sets.count() > 0) {
+ m_series->remove(sets.at(sets.count() - 1));
+ }
+}
+
+void MainWidget::setLegendAlignment()
+{
+ QPushButton *button = qobject_cast<QPushButton *>(sender());
+
+ switch (m_chart->legend()->alignment()) {
+ case Qt::AlignTop:
+ m_chart->legend()->setAlignment(Qt::AlignLeft);
+ if (button)
+ button->setText("Align (Left)");
+ break;
+ case Qt::AlignLeft:
+ m_chart->legend()->setAlignment(Qt::AlignBottom);
+ if (button)
+ button->setText("Align (Bottom)");
+ break;
+ case Qt::AlignBottom:
+ m_chart->legend()->setAlignment(Qt::AlignRight);
+ if (button)
+ button->setText("Align (Right)");
+ break;
+ default:
+ if (button)
+ button->setText("Align (Top)");
+ m_chart->legend()->setAlignment(Qt::AlignTop);
+ break;
+ }
+}
+
+void MainWidget::toggleBold()
+{
+ QFont font = m_chart->legend()->font();
+ font.setBold(!font.bold());
+ m_chart->legend()->setFont(font);
+}
+
+void MainWidget::toggleItalic()
+{
+ QFont font = m_chart->legend()->font();
+ font.setItalic(!font.italic());
+ m_chart->legend()->setFont(font);
+}
+
+void MainWidget::fontSizeChanged()
+{
+ QFont font = m_chart->legend()->font();
+ font.setPointSizeF(m_fontSize->value());
+ m_chart->legend()->setFont(font);
+}
+
+void MainWidget::updateLegendLayout()
+{
+//![4]
+ m_chart->legend()->setGeometry(QRectF(m_legendPosX->value(),
+ m_legendPosY->value(),
+ m_legendWidth->value(),
+ m_legendHeight->value()));
+ m_chart->legend()->update();
+//![4]
+}
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