mirror of
https://github.com/crystalidea/qt6windows7.git
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137 lines
3.3 KiB
C++
137 lines
3.3 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "openglwindow.h"
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#include <QApplication>
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#include <QFocusEvent>
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#include <QHBoxLayout>
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#include <QKeyEvent>
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#include <QLineEdit>
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#include <QMouseEvent>
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#include <QPainter>
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#include <QWidget>
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// Making use of the class from the openglwindow example
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class Window : public OpenGLWindow
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{
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Q_OBJECT
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public:
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using OpenGLWindow::OpenGLWindow;
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void render(QPainter *p) override
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{
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QLinearGradient g(0, 0, 0, height());
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g.setColorAt(0, QColor("lightsteelblue"));
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g.setColorAt(1, Qt::black);
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p->fillRect(0, 0, width(), height(), g);
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p->setPen(Qt::white);
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p->drawText(20, 30, QLatin1String("This is an OpenGL based QWindow"));
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if (m_key.trimmed().length() > 0) {
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QRect bounds = p->boundingRect(QRect(0, 0, width(), height()), Qt::AlignTop | Qt::AlignLeft, m_key);
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p->save();
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p->translate(width() / 2.0, height() / 2.0);
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p->scale(10, 10);
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p->translate(-bounds.width() / 2.0, -bounds.height() / 2.0);
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p->drawText(bounds, Qt::AlignCenter, m_key);
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p->restore();
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}
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if (m_focus)
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p->drawText(20, height() - 20, QLatin1String("Window has focus!"));
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p->setRenderHint(QPainter::Antialiasing);
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p->drawPolyline(m_polygon);
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}
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void mousePressEvent(QMouseEvent *e) override
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{
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if (!m_mouseDown) {
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m_mouseDown = true;
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m_polygon.clear();
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m_polygon.append(e->position().toPoint());
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renderLater();
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}
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}
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void mouseMoveEvent(QMouseEvent *e) override
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{
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if (m_mouseDown) {
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m_polygon.append(e->position().toPoint());
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renderLater();
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}
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}
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void mouseReleaseEvent(QMouseEvent *e) override
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{
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if (m_mouseDown) {
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m_mouseDown = false;
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m_polygon.append(e->position().toPoint());
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renderLater();
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}
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}
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void focusInEvent(QFocusEvent *) override
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{
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m_focus = true;
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renderLater();
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}
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void focusOutEvent(QFocusEvent *) override
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{
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m_focus = false;
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m_polygon.clear();
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renderLater();
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}
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void keyPressEvent(QKeyEvent *e) override
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{
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m_key = e->text();
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renderLater();
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}
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void keyReleaseEvent(QKeyEvent *) override
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{
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m_key = QString();
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renderLater();
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}
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private:
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QPolygon m_polygon;
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QString m_key;
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bool m_mouseDown = false;
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bool m_focus = false;
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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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QWidget *widget = new QWidget;
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QHBoxLayout *layout = new QHBoxLayout(widget);
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Window *window = new Window;
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QWidget *container = QWidget::createWindowContainer(window);
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container->setMinimumSize(300, 300);
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container->setMaximumSize(600, 600);
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container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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container->setFocusPolicy(Qt::StrongFocus);
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window->setGeometry(100, 100, 300, 200);
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layout->addWidget(new QLineEdit(QLatin1String("A QLineEdit")));
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layout->addWidget(container);
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layout->addWidget(new QLineEdit(QLatin1String("A QLabel")));
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widget->show();
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return app.exec();
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}
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#include "windowcontainer.moc"
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