32 lines
No EOL
1.2 KiB
C++
32 lines
No EOL
1.2 KiB
C++
#pragma once
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#ifndef GLWIDGET_FOR_HIGHDPI_H
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#define GLWIDGET_FOR_HIGHDPI_H
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#include <QGLWidget>
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#include <QApplication>
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#include <QDesktopWidget>
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// use obsolete QGLWidget instead of QOpenGLWidget for now...
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// TODO: replace with the "modern" OpenGL source and transfer to QOpenGLWidget
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class GLWidgetForHighDpi : public QGLWidget {
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public:
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GLWidgetForHighDpi(QWidget *parent = Q_NULLPTR,
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const QGLWidget *shareWidget = Q_NULLPTR,
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Qt::WindowFlags f = Qt::WindowFlags())
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: QGLWidget(parent, shareWidget, f) {}
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// returns device-pixel ratio. It is 1 for normal monitors and 2 (or higher
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// ratio) for high DPI monitors. Setting "Display > Set custom text size(DPI)"
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// for Windows corresponds to this ratio.
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int getDevPixRatio() const {
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static int devPixRatio = QApplication::desktop()->devicePixelRatio();
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return devPixRatio;
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}
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// modify sizes for high DPI monitors
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int width() const { return QGLWidget::width() * getDevPixRatio(); }
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int height() const { return QGLWidget::height() * getDevPixRatio(); }
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QRect rect() const { return QRect(0, 0, width(), height()); }
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};
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#endif |