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#include <QProcess>
#include <QApplication>
#include <QDesktopWidget>
#include <QDebug>
#include "util/autohidpi.h"
#ifdef __WINDOWS__
double AutoHiDpi::getScaleFactor() {
// Windows 10 has a percentage setting in preferences, which
// finally changes the screen DPI setting
// 96 dpi = 100%
// 120 dpi = 125%
// 144 dpi = 150%
// 192 dpi = 200%
// 240 dpi = 250%
// 288 dpi = 300%
int dpiX = QApplication::desktop()->logicalDpiX();
qDebug() << "AutoHiDpi::getScaleFactor()" << dpiX;
// This follows the strategy used in Gnome/Unity
// that the widget size is doubled once the font size
// reaches the double vale threshold
if (dpiX < 96) {
return -1;
} else if (dpiX < 192) {
return 1;
} else if (dpiX < 288) {
return 2;
} else if (dpiX == 288) {
return 3;
}
return -1;
}
#elif __APPLE__
double AutoHiDpi::getScaleFactor() {
return -1;
}
#else
double AutoHiDpi::getScaleFactor() {
QProcess gsettingsProcess;
QStringList args;
args.append("get");
args.append("org.gnome.desktop.interface");
args.append("scaling-factor");
gsettingsProcess.start("gsettings", args);
gsettingsProcess.waitForFinished();
QString output = gsettingsProcess.readAllStandardOutput();
// output is now "uint32 1" or "" if gsettings is not installed
bool ok;
double value = output.remove(0, 7).toDouble(&ok);
if (ok && value > 0) {
return value;
}
return 0;
}
#endif // __LINUX__
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