Examples: enable HighDPI scaling for examples on Android

These examples show very tiny UI elements on Android devices,
thus enabling HighDPI.

Task-number: QTBUG-80717
Change-Id: I813801d5249dc1fcfc6f61a8d146f60dd19901f6
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

examples/widgets/graphicsview/collidingmice/main.cpp

@@ -58,6 +58,9 @@ static constexpr int MouseCount = 7;
 //! [0]
 int main(int argc, char **argv)
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
 //! [0]
 

examples/widgets/graphicsview/diagramscene/main.cpp

@@ -55,6 +55,9 @@
 int main(int argv, char *args[])
 {
     Q_INIT_RESOURCE(diagramscene);
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
 
     QApplication app(argv, args);
     MainWindow mainWindow;

examples/widgets/itemviews/addressbook/main.cpp

@@ -55,6 +55,9 @@
 //! [0]
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     MainWindow mw;
     mw.show();

examples/widgets/itemviews/spreadsheet/main.cpp

@@ -56,6 +56,10 @@
 int main(int argc, char **argv)
 {
     Q_INIT_RESOURCE(spreadsheet);
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+
     QApplication app(argc, argv);
     SpreadSheet sheet(10, 6);
     sheet.setWindowIcon(QPixmap(":/images/interview.png"));

examples/widgets/mainwindows/application/main.cpp

@@ -58,6 +58,9 @@
 int main(int argc, char *argv[])
 {
     Q_INIT_RESOURCE(application);
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
 
     QApplication app(argc, argv);
     QCoreApplication::setOrganizationName("QtProject");

examples/widgets/mainwindows/dockwidgets/main.cpp

@@ -54,6 +54,9 @@
 
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     Q_INIT_RESOURCE(dockwidgets);
     MainWindow mainWin;

examples/widgets/painting/affine/main.cpp

@@ -55,7 +55,9 @@
 int main(int argc, char **argv)
 {
     Q_INIT_RESOURCE(affine);
-
+#ifdef Q_OS_ANDROID
+    qputenv("QT_SCALE_FACTOR", "2");
+#endif
     QApplication app(argc, argv);
 
     XFormWidget xformWidget(nullptr);

examples/widgets/painting/concentriccircles/main.cpp

@@ -54,6 +54,9 @@
 
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     Window window;
     window.show();

examples/widgets/painting/fontsampler/main.cpp

@@ -54,6 +54,9 @@
 
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     MainWindow window;
     window.show();

examples/widgets/painting/gradients/main.cpp

@@ -55,6 +55,9 @@
 int main(int argc, char *argv[])
 {
     Q_INIT_RESOURCE(gradients);
+#ifdef Q_OS_ANDROID
+    qputenv("QT_SCALE_FACTOR", "2");
+#endif
 
     QApplication app(argc, argv);
 

examples/widgets/painting/pathstroke/main.cpp

@@ -55,6 +55,9 @@
 int main(int argc, char **argv)
 {
     Q_INIT_RESOURCE(pathstroke);
+#ifdef Q_OS_ANDROID
+    qputenv("QT_SCALE_FACTOR", "2");
+#endif
 
     QApplication app(argc, argv);
 

examples/widgets/tools/undo/main.cpp

@@ -54,6 +54,9 @@
 int main(int argc, char **argv)
 {
     Q_INIT_RESOURCE(undo);
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
 
     QApplication app(argc, argv);
 

examples/widgets/widgets/calculator/main.cpp

@@ -54,6 +54,9 @@
 
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     Calculator calc;
     calc.show();

examples/widgets/widgets/elidedlabel/main.cpp

@@ -55,6 +55,9 @@
 //! [0]
 int main( int argc, char *argv[] )
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication application( argc, argv );
     TestWidget w;
     w.showFullScreen();

examples/widgets/widgets/scribble/main.cpp

@@ -54,6 +54,9 @@
 
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     MainWindow window;
     window.show();

examples/widgets/widgets/sliders/main.cpp

@@ -54,6 +54,9 @@
 
 int main(int argc, char *argv[])
 {
+#ifdef Q_OS_ANDROID
+    QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
     QApplication app(argc, argv);
     Window window;
     window.show();