mirror of
https://github.com/crystalidea/qt6windows7.git
synced 2024-11-24 04:20:46 +08:00
109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
// Copyright (C) 2020 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include <QtWidgets>
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class ScreenWidget : public QWidget
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{
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public:
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ScreenWidget(QWidget *parent)
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: QWidget(parent, Qt::Window)
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{
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textEdit = new QTextEdit;
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textEdit->setReadOnly(true);
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QHBoxLayout *layout = new QHBoxLayout;
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layout->addWidget(textEdit);
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setLayout(layout);
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}
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void updateText()
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{
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QString text = "<html><body>";
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text += QString("<p>Screen: %1\n</p>").arg(screen()->name());
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text += QString("<p>DPR: %1\n</p>").arg(screen()->devicePixelRatio());
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text += QString("</body></html>");
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textEdit->setText(text);
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}
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private:
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QTextEdit *textEdit;
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};
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class Controller : public QDialog
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{
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Q_OBJECT
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public:
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Controller()
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{
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QPushButton *screenButton = new QPushButton;
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screenButton->setText("Show on Screen");
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screenButton->setEnabled(false);
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connect(screenButton, &QAbstractButton::clicked, this, &Controller::setScreen);
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QPushButton *exitButton = new QPushButton;
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exitButton->setText("E&xit");
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connect(exitButton, &QAbstractButton::clicked, QApplication::instance(), &QCoreApplication::quit);
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QHBoxLayout *actionLayout = new QHBoxLayout;
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actionLayout->addWidget(screenButton);
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actionLayout->addWidget(exitButton);
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QGroupBox *radioGroup = new QGroupBox;
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radioGroup->setTitle(QLatin1String("Select target screen"));
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QVBoxLayout *groupLayout = new QVBoxLayout;
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const auto screens = QGuiApplication::screens();
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int count = 0;
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for (const auto &screen : screens) {
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QRadioButton *choice = new QRadioButton;
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choice->setText(QString(QLatin1String("%1: %2")).arg(count).arg(screen->name()));
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connect(choice, &QAbstractButton::toggled, this, [=](bool on){
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if (on)
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targetScreen = count;
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screenButton->setEnabled(targetScreen != -1);
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});
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groupLayout->addWidget(choice);
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++count;
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}
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radioGroup->setLayout(groupLayout);
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QVBoxLayout *layout = new QVBoxLayout;
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layout->addWidget(radioGroup);
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layout->addLayout(actionLayout);
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setLayout(layout);
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}
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private slots:
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void setScreen()
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{
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QScreen *screen = QGuiApplication::screens().at(targetScreen);
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if (!widget) {
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widget = new ScreenWidget(this);
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widget->setAttribute(Qt::WA_DeleteOnClose);
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widget->setWindowTitle("Normal Window");
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}
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widget->setScreen(screen);
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widget->show();
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widget->updateText();
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}
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private:
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QPointer<ScreenWidget> widget = nullptr;
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int targetScreen = -1;
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};
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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Controller controller;
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controller.show();
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return app.exec();
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}
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#include "main.moc"
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