/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the examples of the Qt Toolkit.
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**
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**     notice, this list of conditions and the following disclaimer.
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**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
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****************************************************************************/

#include "qwaylandcompositor.h"
#include "qwaylandsurface.h"
#include "qwaylandsurfaceitem.h"

#include <QGuiApplication>
#include <QTimer>
#include <QPainter>
#include <QMouseEvent>

#include <QQmlContext>

#include <QQuickItem>
#include <QQuickView>

class QmlCompositor : public QQuickView, public QWaylandCompositor
{
    Q_OBJECT
    Q_PROPERTY(QWaylandSurface* fullscreenSurface READ fullscreenSurface WRITE setFullscreenSurface NOTIFY fullscreenSurfaceChanged)

public:
    QmlCompositor()
        : QWaylandCompositor(this, 0, static_cast<ExtensionFlag>(DefaultExtensions | SubSurfaceExtension))
        , m_fullscreenSurface(0)
    {
        setSource(QUrl("main.qml"));
        setResizeMode(QQuickView::SizeRootObjectToView);
        setColor(Qt::black);
        winId();

	connect(this, SIGNAL(frameSwapped()), this, SLOT(frameSwappedSlot()));
    }

    QWaylandSurface *fullscreenSurface() const
    {
        return m_fullscreenSurface;
    }

signals:
    void windowAdded(QVariant window);
    void windowDestroyed(QVariant window);
    void windowResized(QVariant window);
    void fullscreenSurfaceChanged();

public slots:
    void destroyWindow(QVariant window) {
        qvariant_cast<QObject *>(window)->deleteLater();
    }

    void destroyClientForWindow(QVariant window) {
        QWaylandSurface *surface = qobject_cast<QWaylandSurfaceItem *>(qvariant_cast<QObject *>(window))->surface();
        destroyClientForSurface(surface);
    }

    void setFullscreenSurface(QWaylandSurface *surface) {
        if (surface == m_fullscreenSurface)
            return;
        m_fullscreenSurface = surface;
        emit fullscreenSurfaceChanged();
    }

private slots:
    void surfaceMapped() {
        QWaylandSurface *surface = qobject_cast<QWaylandSurface *>(sender());
        //Ignore surface if it's not a window surface
        if (!surface->hasShellSurface())
            return;

        QWaylandSurfaceItem *item = surface->surfaceItem();
        //Create a WaylandSurfaceItem if we have not yet
        if (!item)
            item = new QWaylandSurfaceItem(surface, rootObject());

        item->setTouchEventsEnabled(true);
        //item->takeFocus();
        emit windowAdded(QVariant::fromValue(static_cast<QQuickItem *>(item)));
    }
    void surfaceUnmapped() {
        QWaylandSurface *surface = qobject_cast<QWaylandSurface *>(sender());
        if (surface == m_fullscreenSurface)
            m_fullscreenSurface = 0;
        QQuickItem *item = surface->surfaceItem();
        emit windowDestroyed(QVariant::fromValue(item));
    }

    void surfaceDestroyed(QObject *object) {
        QWaylandSurface *surface = static_cast<QWaylandSurface *>(object);
        if (surface == m_fullscreenSurface)
            m_fullscreenSurface = 0;
        QQuickItem *item = surface->surfaceItem();
        emit windowDestroyed(QVariant::fromValue(item));
    }

    void frameSwappedSlot() {
        frameFinished(m_fullscreenSurface);
    }

protected:
    void resizeEvent(QResizeEvent *event)
    {
        QQuickView::resizeEvent(event);
        QWaylandCompositor::setOutputGeometry(QRect(0, 0, width(), height()));
    }

    void surfaceCreated(QWaylandSurface *surface) {
        connect(surface, SIGNAL(destroyed(QObject *)), this, SLOT(surfaceDestroyed(QObject *)));
        connect(surface, SIGNAL(mapped()), this, SLOT(surfaceMapped()));
        connect(surface,SIGNAL(unmapped()), this,SLOT(surfaceUnmapped()));
    }

private:
    QWaylandSurface *m_fullscreenSurface;
};

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QmlCompositor compositor;
    compositor.setTitle(QLatin1String("QML Compositor"));
    compositor.setGeometry(0, 0, 1024, 768);
    compositor.show();

    compositor.rootContext()->setContextProperty("compositor", &compositor);

    QObject::connect(&compositor, SIGNAL(windowAdded(QVariant)), compositor.rootObject(), SLOT(windowAdded(QVariant)));
    QObject::connect(&compositor, SIGNAL(windowDestroyed(QVariant)), compositor.rootObject(), SLOT(windowDestroyed(QVariant)));
    QObject::connect(&compositor, SIGNAL(windowResized(QVariant)), compositor.rootObject(), SLOT(windowResized(QVariant)));

    return app.exec();
}

#include "main.moc"