window.cpp 范例文件

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "circlewidget.h"
#include "window.h"
#include <QtWidgets>
Window::Window()
{
    aliasedLabel = createLabel(tr("Aliased"));
    antialiasedLabel = createLabel(tr("Antialiased"));
    intLabel = createLabel(tr("Int"));
    floatLabel = createLabel(tr("Float"));
    QGridLayout *layout = new QGridLayout;
    layout->addWidget(aliasedLabel, 0, 1);
    layout->addWidget(antialiasedLabel, 0, 2);
    layout->addWidget(intLabel, 1, 0);
    layout->addWidget(floatLabel, 2, 0);
    QTimer *timer = new QTimer(this);
    for (int i = 0; i < 2; ++i) {
        for (int j = 0; j < 2; ++j) {
            circleWidgets[i][j] = new CircleWidget;
            circleWidgets[i][j]->setAntialiased(j != 0);
            circleWidgets[i][j]->setFloatBased(i != 0);
            connect(timer, SIGNAL(timeout()),
                    circleWidgets[i][j], SLOT(nextAnimationFrame()));
            layout->addWidget(circleWidgets[i][j], i + 1, j + 1);
        }
    }
    timer->start(100);
    setLayout(layout);
    setWindowTitle(tr("Concentric Circles"));
}
QLabel *Window::createLabel(const QString &text)
{
    QLabel *label = new QLabel(text);
    label->setAlignment(Qt::AlignCenter);
    label->setMargin(2);
    label->setFrameStyle(QFrame::Box | QFrame::Sunken);
    return label;
}