Polish the image gestures example.

- Add a command line parser to properly evaluate help option and
  directory argument, add options to disable gestures.
- Add logging category so that the user can actually see what is
  happening.
- Scale large images.
- Use qreal instead of float.
- Minor polishing: set window title, position file dialog at
  pictures location.

Task-number: QTBUG-37759
Task-number: QTBUG-37203

Change-Id: Ibaf54a13034b150386a8aee476f83a9eba298298
Reviewed-by: Indrajit Tapadar <indrajit.tapadar@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/examples/widgets/gestures/imagegestures/mainwidget.cpp b/examples/widgets/gestures/imagegestures/mainwidget.cpp
index 105cdf184e..74c2cc5bb1 100644
--- a/examples/widgets/gestures/imagegestures/mainwidget.cpp
+++ b/examples/widgets/gestures/imagegestures/mainwidget.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -41,15 +41,28 @@
 #include "imagewidget.h"
 #include "mainwidget.h"
 
+#include <QScreen>
+#include <QGuiApplication>
+#include <QDir>
+
 MainWidget::MainWidget(QWidget *parent)
     : QMainWindow(parent)
+    , imageWidget(new ImageWidget(this))
 {
-    resize(400, 300);
-    imageWidget = new ImageWidget(this);
     setCentralWidget(imageWidget);
+    const QRect screenGeometry = QGuiApplication::primaryScreen()->availableGeometry();
+    QRect geometry(QPoint(0, 0), QSize(screenGeometry.width() * 3 / 4, screenGeometry.height() * 3 / 4));
+    geometry.moveCenter(screenGeometry.center());
+    setGeometry(geometry);
 }
 
 void MainWidget::openDirectory(const QString &path)
 {
+    setWindowTitle(QDir::toNativeSeparators(path));
     imageWidget->openDirectory(path);
 }
+
+void MainWidget::grabGestures(const QList<Qt::GestureType> &gestures)
+{
+    imageWidget->grabGestures(gestures);
+}