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, 7 insertions, 6 deletions

diff --git a/examples/svg/svgviewer/svgview.h b/examples/svg/svgviewer/svgview.h
index b6d1b01..41c0ca5 100644
--- a/examples/svg/svgviewer/svgview.h
+++ b/examples/svg/svgviewer/svgview.h
@@ -46,7 +46,6 @@
 QT_BEGIN_NAMESPACE
 class QWheelEvent;
 class QPaintEvent;
-class QFile;
 QT_END_NAMESPACE
 
 class SvgView : public QGraphicsView
@@ -56,11 +55,13 @@ class SvgView : public QGraphicsView
 public:
     enum RendererType { Native, OpenGL, Image };
 
-    SvgView(QWidget *parent = 0);
+    explicit SvgView(QWidget *parent = nullptr);
 
-    void openFile(const QFile &file);
+    bool openFile(const QString &fileName);
     void setRenderer(RendererType type = Native);
-    void drawBackground(QPainter *p, const QRectF &rect);
+    void drawBackground(QPainter *p, const QRectF &rect) override;
+
+    QSize svgSize() const;
 
 public slots:
     void setHighQualityAntialiasing(bool highQualityAntialiasing);
@@ -68,8 +69,8 @@ public slots:
     void setViewOutline(bool enable);
 
 protected:
-    void wheelEvent(QWheelEvent *event);
-    void paintEvent(QPaintEvent *event);
+    void wheelEvent(QWheelEvent *event) override;
+    void paintEvent(QPaintEvent *event) override;
 
 private:
     RendererType m_renderer;