68 lines
2.8 KiB
C++
68 lines
2.8 KiB
C++
/*
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* MIT License
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*
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* Copyright (C) 2020 by wangwenx190 (Yuhang Zhao)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "widget.h"
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#include <QApplication>
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#include <QStyleOption>
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int main(int argc, char *argv[])
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{
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QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
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// High DPI scaling is enabled by default from Qt 6
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#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
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// Windows: we are using the manifest file to get maximum compatibility
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// because some APIs are not supprted on old systems such as Windows 7
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// and Windows 8. And once we have set the DPI awareness level in the
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// manifest file, any attemptation to try to change it through API will
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// fail. In other words, Qt won't be able to enable or disable high DPI
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// scaling or change the DPI awareness level once we have set it in the
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// manifest file. So the following two lines are uesless actually (However,
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// they are still useful on other platforms).
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QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
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QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
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#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
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// Don't round the scale factor.
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// This will break QWidget applications because they can't render correctly.
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// Qt Quick applications won't have this issue.
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QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
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Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
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#endif
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#endif
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QApplication application(argc, argv);
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QApplication::setFont({QString::fromUtf8("Microsoft YaHei")});
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Widget widget;
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QStyleOption option;
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option.initFrom(&widget);
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widget.setWindowIcon(widget.style()->standardIcon(QStyle::SP_ComputerIcon, &option));
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widget.setWindowTitle(QObject::tr("Hello, World!"));
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widget.show();
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return QApplication::exec();
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}
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