Polish the SVG viewer example.

- Use Qt 5 connection syntax, demonstrating lambdas.
- Use QCommandLineParser.
- Improve error handling.
- Use Mime API of QFileDialog, point to pictures location initially.
- Prevent the application from shrinking when loading small images.
- Minor polishing, status messages on loading, About Qt dialog.

Change-Id: I76f14001c9ab12cbfaaacc2ca4828b404e4b13b2
Reviewed-by: aavit <eirik.aavitsland@theqtcompany.com>

1 files changed, 16 insertions, 5 deletions

diff --git a/examples/svg/svgviewer/main.cpp b/examples/svg/svgviewer/main.cpp
index 671262c..9155c87 100644
--- a/examples/svg/svgviewer/main.cpp
+++ b/examples/svg/svgviewer/main.cpp
@@ -39,7 +39,9 @@
 ****************************************************************************/
 
 #include <QApplication>
-#include <QString>
+#include <QCommandLineParser>
+#include <QCommandLineOption>
+#include <QStringList>
 #ifndef QT_NO_OPENGL
 #include <QGLFormat>
 #endif
@@ -51,12 +53,21 @@ int main(int argc, char **argv)
     Q_INIT_RESOURCE(svgviewer);
 
     QApplication app(argc, argv);
+    QCoreApplication::setApplicationName("SVG Viewer");
+    QGuiApplication::setApplicationDisplayName(QCoreApplication::applicationName());
+    QCoreApplication::setOrganizationName("QtProject");
+    QCoreApplication::setApplicationVersion(QT_VERSION_STR);
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription("Qt SVG Viewer");
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.addPositionalArgument("file", "The file to open.");
+    parser.process(app);
 
     MainWindow window;
-    if (argc == 2)
-        window.openFile(argv[1]);
-    else
-        window.openFile(":/files/bubbles.svg");
+    if (!window.loadFile(parser.positionalArguments().value(0, QLatin1String(":/files/bubbles.svg"))))
+        return -1;
     window.show();
     return app.exec();
 }