void ScreenValues::setDp(float dp)
{
if (m_dp == dp)
return;
m_dp = dp;
emit dpChanged();
}
void UnitsAttached::screenChanged(QScreen *screen)
{
if (screen != m_screen) {
QScreen *oldScreen = m_screen;
m_screen = screen;
if (oldScreen)
oldScreen->disconnect(this);
if (oldScreen == nullptr || screen == nullptr ||
screen->physicalDotsPerInch() != oldScreen->physicalDotsPerInch() ||
screen->logicalDotsPerInch() != oldScreen->logicalDotsPerInch() ||
screen->devicePixelRatio() != oldScreen->devicePixelRatio()) {
updateDPI();
emit dpChanged();
}
}
}
MyDevice::MyDevice(QObject *parent) : QObject(parent)
{
m_screen = qApp->primaryScreen();
m_dpi = m_screen->physicalDotsPerInch() * m_screen->devicePixelRatio();
m_isMobile = false;
#if defined(Q_OS_IOS)
m_dpi = m_screen->physicalDotsPerInch();
m_isMobile = true;
#elif defined(Q_OS_ANDROID)
QAndroidJniEnvironment env;
QAndroidJniObject activity = QtAndroid::androidActivity();
QAndroidJniObject resources = activity.callObjectMethod("getResources", "()Landroid/content/res/Resources;");
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
env->ExceptionClear();
//return EXIT_FAILURE;
}
QAndroidJniObject displayMetrics = resources.callObjectMethod("getDisplayMetrics", "()Landroid/util/DisplayMetrics;");
if (env->ExceptionCheck()) {
env->ExceptionDescribe();
env->ExceptionClear();
//return EXIT_FAILURE;
}
m_dpi = displayMetrics.getField<int>("densityDpi");
m_isMobile = true;
#else
// standard dpi
m_dpi = m_screen->logicalDotsPerInch() * m_screen->devicePixelRatio();
#endif
m_dp = m_dpi / 160.f;
emit dpChanged(m_dp);
emit isMobileChanged(m_isMobile);
//qDebug() << "*** dp:"<<m_dp<<" dpi:"<<m_dpi;
}
