Add support for custom styles and runtime change of style

Styles can now co-exist in plugin resources and file system.
All the built-in styles are now embedded into plugin resources
and therefore available at runtime. Furthermore, custom styles
can be installed independently to the target system by copying
them into Styles directory:

$$[QT_INSTALL_QML]/QtQuick/Enterprise/VirtualKeyboard/Styles

The default built-in style is still configured at build time
and changed with CONFIG+=retro-style as before.

The runtime style can be changed by setting an environment
variable QT_VIRTUALKEYBOARD_STYLE to the name of the style.
The style name can be one of the built-in styles or custom
styles currently available in the system. However, there is
an limitation that the custom style cannot have the same
name as any of the built-in styles.

Added new child module QtQuick.Enterprise.VirtualKeyboard.Settings,
which provides VirtualKeyboardSettings instance.

Change-Id: Ide076529c2c6d6944d8c0532d0b5daa5a56cae76
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/src/virtualkeyboard/settings.h b/src/virtualkeyboard/settings.h
new file mode 100644
index 00000000..6092bc43
--- /dev/null
+++ b/src/virtualkeyboard/settings.h
@@ -0,0 +1,48 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Virtual Keyboard add-on for Qt Enterprise.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+**
+****************************************************************************/
+
+#ifndef SETTINGS_H
+#define SETTINGS_H
+
+#include <QObject>
+
+class SettingsPrivate;
+
+class Settings : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(Settings)
+    Q_DECLARE_PRIVATE(Settings)
+
+    Settings(QObject *parent = 0);
+
+public:
+    static Settings *instance();
+
+    QString style() const;
+    void setStyle(const QString &style);
+
+    QString styleName() const;
+    void setStyleName(const QString &name);
+
+signals:
+    void styleChanged();
+    void styleNameChanged();
+};
+
+#endif // SETTINGS_H