diff options
Diffstat (limited to 'examples/charts/chartsgallery/lightmarkerswidget.cpp')
| -rw-r--r-- | examples/charts/chartsgallery/lightmarkerswidget.cpp | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/examples/charts/chartsgallery/lightmarkerswidget.cpp b/examples/charts/chartsgallery/lightmarkerswidget.cpp new file mode 100644 index 00000000..ddb9b759 --- /dev/null +++ b/examples/charts/chartsgallery/lightmarkerswidget.cpp @@ -0,0 +1,211 @@ +// Copyright (C) 2023 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only + +#include "lightmarkerswidget.h" + +#include <QBrush> +#include <QChart> +#include <QChartView> +#include <QCheckBox> +#include <QComboBox> +#include <QGraphicsLayout> +#include <QGridLayout> +#include <QHBoxLayout> +#include <QLabel> +#include <QList> +#include <QPainter> +#include <QPainterPath> +#include <QSplineSeries> + +LightMarkersWidget::LightMarkersWidget(QWidget *parent) + : ContentWidget(parent) +{ + //![1] + constexpr qreal marker_size = 20.; + + auto series = new QSplineSeries; + series->append({QPointF(0., 0.), + QPointF(0.5, 2.27), + QPointF(1.5, 2.2), + QPointF(3.3, 1.7), + QPointF(4.23, 3.1), + QPointF(5.3, 2.3), + QPointF(6.47, 4.1) + }); + series->setMarkerSize(marker_size); + series->setLightMarker(rectangle(marker_size, Qt::red)); + series->setSelectedLightMarker(blueTriangle(marker_size)); + + QObject::connect(series, &QXYSeries::clicked, series, [=](const QPointF &point) { + int index = series->points().indexOf(point); + if (index != -1) + series->toggleSelection({index}); + }); + //![1] + + //![2] + auto chart = new QChart; + chart->addSeries(series); + chart->createDefaultAxes(); + chart->legend()->setVisible(false); + chart->layout()->setContentsMargins(0, 0, 0, 0); + chart->setTitle("Select points with mouse click"); + + auto chartView = new QChartView(chart, this); + chartView->setRenderHint(QPainter::Antialiasing); + + auto controlWidget = new QWidget(this); + auto controlLayout = new QGridLayout(controlWidget); + //![2] + + //![3] + auto charPointCombobox = new QComboBox(controlWidget); + auto charPointSelectedCombobox = new QComboBox(controlWidget); + auto lineColorCombobox = new QComboBox(controlWidget); + auto showUnselectedPointsCheckbox = new QCheckBox(controlWidget); + //![3] + + //![4] + auto charPoint = new QLabel(tr("Char point: "), controlWidget); + charPointCombobox->addItems({tr("Red rectangle"), + tr("Green triangle"), + tr("Orange circle") + }); + QObject::connect(charPointCombobox, &QComboBox::currentIndexChanged, series, [=](const int index) { + if (showUnselectedPointsCheckbox->isChecked()) + series->setLightMarker(getPointRepresentation(PointType(index), marker_size)); + }); + //![4] + + //![5] + auto charPointSelected = new QLabel(tr("Char point selected: "), controlWidget); + charPointSelectedCombobox->addItems({tr("Blue triangle"), + tr("Yellow rectangle"), + tr("Lavender circle") + }); + QObject::connect(charPointSelectedCombobox, &QComboBox::currentIndexChanged, series, [=](const int index) { + series->setSelectedLightMarker(getSelectedPointRepresentation(SelectedPointType(index), marker_size)); + }); + + auto lineColorLabel = new QLabel(tr("Line color: "), controlWidget); + lineColorCombobox->addItems({tr("Blue"), + tr("Black"), + tr("Mint") + }); + QObject::connect(lineColorCombobox, &QComboBox::currentIndexChanged, series, [=](const int index) { + series->setColor(makeLineColor(LineColor(index))); + }); + //![5] + + //![6] + auto showUnselectedPointsLabel = new QLabel(tr("Display unselected points: "), controlWidget); + showUnselectedPointsCheckbox->setChecked(true); + QObject::connect(showUnselectedPointsCheckbox, &QCheckBox::stateChanged, series, [=](const int state) { + if (state) + series->setLightMarker(getPointRepresentation(PointType(charPointCombobox->currentIndex()), marker_size)); + else + series->setLightMarker(QImage()); + }); + //![6] + + //![7] + controlLayout->addWidget(charPoint, 0, 0); + controlLayout->addWidget(charPointCombobox, 0, 1); + + controlLayout->addWidget(charPointSelected, 1, 0); + controlLayout->addWidget(charPointSelectedCombobox, 1, 1); + + controlLayout->addWidget(lineColorLabel, 2, 0); + controlLayout->addWidget(lineColorCombobox, 2, 1); + + controlLayout->addWidget(showUnselectedPointsLabel, 3, 0); + controlLayout->addWidget(showUnselectedPointsCheckbox, 3, 1, 1, 2); + + m_mainWidget = new QWidget(this); + auto mainLayout = new QHBoxLayout(m_mainWidget); + mainLayout->addWidget(chartView); + mainLayout->addWidget(controlWidget); + //![7] +} + +void LightMarkersWidget::resizeEvent(QResizeEvent *) +{ + m_mainWidget->resize(size()); +} + +QImage LightMarkersWidget::rectangle(qreal imageSize, const QColor &color) +{ + QImage image(imageSize, imageSize, QImage::Format_RGB32); + QPainter painter; + painter.begin(&image); + painter.fillRect(0, 0, imageSize, imageSize, color); + painter.end(); + return image; +} + +QImage LightMarkersWidget::circle(qreal imageSize, const QColor &color) +{ + QImage image(imageSize, imageSize, QImage::Format_ARGB32); + image.fill(QColor(0, 0, 0, 0)); + QPainter paint; + paint.begin(&image); + paint.setBrush(color); + QPen pen = paint.pen(); + pen.setWidth(0); + paint.setPen(pen); + paint.drawEllipse(0, 0, imageSize * 0.9, imageSize * 0.9); + paint.end(); + return image; +} + +QImage LightMarkersWidget::blueTriangle(qreal imageSize) +{ + return QImage(":/blue_triangle").scaled(imageSize, imageSize); +} + +QImage LightMarkersWidget::greenTriangle(qreal imageSize) +{ + return QImage(":/green_triangle").scaled(imageSize, imageSize); +} + +QImage LightMarkersWidget::getPointRepresentation(PointType pointType, int imageSize) +{ + switch (pointType) { + case PointType::RedRectangle: + return rectangle(imageSize, Qt::red); + case PointType::GreenTriangle: + return greenTriangle(imageSize); + case PointType::OrangeCircle: + return circle(imageSize, QColor(255, 127, 80)); + default: + return rectangle(imageSize, Qt::red); + } +} + +QImage LightMarkersWidget::getSelectedPointRepresentation(SelectedPointType pointType, int imageSize) +{ + switch (pointType) { + case SelectedPointType::BlueTriangle: + return blueTriangle(imageSize); + case SelectedPointType::YellowRectangle: + return rectangle(imageSize, Qt::yellow); + case SelectedPointType::LavenderCircle: + return circle(imageSize, QColor(147, 112, 219)); + default: + return blueTriangle(imageSize); + } +} + +QColor LightMarkersWidget::makeLineColor(LineColor lineColor) +{ + switch (lineColor) { + case LineColor::Blue: + return QColor(65, 105, 225); + case LineColor::Black: + return QColor(0, 0, 0); + case LineColor::Mint: + return QColor(70, 203, 155); + default: + return QColor(0, 0, 0); + } +} |