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Switches to an alternative to window(), for older Qt support.

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This commit is contained in:
Thomas Harte 2020-07-02 21:53:30 -04:00
parent f7e13356c4
commit b850183a1e
1 changed files with 10 additions and 2 deletions
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12
OSBindings/Qt/scantargetwidget.cpp
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@ -1,6 +1,9 @@
#include "scantargetwidget.h"
#include <QApplication>
#include <QDebug>
#include <QDesktopWidget>
#include <QGuiApplication>
#include <QOpenGLContext>
#include <QScreen>
#include <QTimer>
@ -24,12 +27,16 @@ void ScanTargetWidget::paintGL() {
requested_redraw_time_ = 0;
}
const float newOutputScale = float(window()->screen()->devicePixelRatio());
// TODO: if Qt 5.14 can be guaranteed, just use window()->screen().
const auto screenNumber = QApplication::desktop()->screenNumber(this);
QScreen *const screen = QGuiApplication::screens()[screenNumber];
const float newOutputScale = float(screen->devicePixelRatio());
if(outputScale != newOutputScale) {
outputScale = newOutputScale;
resize();
}
vsyncPredictor.set_frame_rate(float(window()->screen()->refreshRate()));
vsyncPredictor.set_frame_rate(float(screen->refreshRate()));
glClear(GL_COLOR_BUFFER_BIT);
@ -115,6 +122,7 @@ void ScanTargetWidget::stop() {
setDefaultClearColour();
vsyncPredictor.pause();
requested_redraw_time_ = 0;
repaint();
}
void ScanTargetWidget::setDefaultClearColour() {