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// 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);
}
}
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