#ifndef _GUICONTROLER_H_
#define _GUICONTROLER_H_

#include <QList>
#include <QtXml>
#include <QKeyEvent>

namespace projection
{
class ProjectionModel;
class Channel;
class QDesignViewWindow;
class QDesignViewWidget;
class QClientWindow;
class QProjectorWindow;
class QSceneViewerWindow;
class QPreferenceDialog;
class QCalibrationDialog;

/**
 * GUI control class.
 */
class GUIControler
{
public:

    /**
     * Constructor.
     *
     * @param pModel Projection model.
     */
    GUIControler(ProjectionModel* pModel);

    /**
     * Destructor.
     */
    virtual ~GUIControler();

    /**
     * Initialize GUIs.
     *
     * @param bServer True if this program is a server, false if it is a client.
     */
    void init(bool bServer);

    /**
     * Load projection settings from a file.
     *
     * @param fileName File name to load.
     * @return True if successfully loaded.
     */
    bool loadFile(const QString& fileName);

    /**
     * Save the current projection settings to a file.
     *
     * @param fileName File name to save.
     * @return True if successfully saved.
     */
    bool saveFile(const QString& fileName);

    /**
     * Retrieve main window.
     *
     * @return DesignViewWindow in server, ClientWindow in Client.
     */
    QWidget* getMainWindow();

    /**
     * Retrieve QGLWidget for sharing OpenGL context.
     *
     * @return QGLWidget for sharing OpenGL context.
     */
    QGLWidget* getGLWidget();

    /**
     * Retrieve DesignView widget.
     *
     * @return DesignView widget.
     */
    QDesignViewWidget* getDesignView();

    /**
     * Select a channel.
     *
     * @param pChannel Channel object to select.
     */
    void selectChannel(Channel* pChannel);

    /**
     * Remove the specified channel.
     *
     * @param pChannel Channel object to remove.
     */
    void removeChannel(Channel* pChannel);

    /**
     * Process key event for channel.
     *
     * @param pChannel Channel to process key event.
     * @param pEvent Key event.
     */
    void processChannelKeyEvent(Channel* pChannel, QKeyEvent* pEvent);

    /**
     * Update the channel list in GUI.
     */
    void updateChannelsGUI();

    /**
     * Update the name of channels in GUI.
     */
    void updateChannelNamesGUI();

    /**
     * Update the channel in GUI.
     */
    void updateChannelGUI();

    /**
     * Update GUI.
     */
    void updateGUI();

    /**
     * Redraw SceneViewer.
     */
    void updateSceneViewer();

    /**
     * Put the camera at the center of the scene.
     */
    void sceneCenterView();

    /**
     * Set camera to view all the scene.
     */
    void sceneViewAll();

    /**
     * Redraw DesignViewWindow and ProjectorWindows.
     */
    void updateViews();

    /**
     * Set scene size for SceneViewer.
     *
     * @param radius Radius of the scene.
     */
    void setSceneSize(float radius);

    /**
     * Create (if not exist) and show a ProjectorWindow for the specified channel.
     *
     * @param pChannel Channel object for the ProjectorWindow.
     */
    void showProjectorWindow(Channel* pChannel);

    /**
     * Create (if not exist) and show a SceneViewerWindow.
     */
    void showSceneViewerWindow();

    /**
     * Create (if not exist) and show a PreferenceDialog.
     */
    void showPreferenceDialog();

    /**
     * Create (if not exist) and show a CalibrationWindow for the specified channel.
     *
     * @param pChannel Channel object for the CalibrationWindow.
     */
    void showCalibrationDialog(Channel* pChannel);

    /**
     * Show an instant message in status bar of the DesignViewWindow.
     *
     * @param message Message to show.
     * @param timeout Time out interval to disappear in micro seconds.
     */
    void showStatusBarMessage(const QString& message, int timeout=0);

    /**
     * Append log to Client Window.
     *
     * @param log Log text.
     */
    void appendClientLog(const QString& log);

    /**
     * Close all windows to quit the application.
     */
    void closeAllWindows();

    /**
     * Restore settings of the DesignView and the SceneViewer.
     *
     * @param Parent XML element of the DesignView and the SceneViewer settings.
     */
    bool initFromDOMElement(const QDomElement& element);

    /**
     * Store the current DesignView and SceneViewer as XML data.
     *
     * @param name XML node name of the data.
     * @param doc XML document to store the data.
     * @return Current DesignView and SceneViewersettings as XML data.
     */
    QDomElement domElement(const QString& name, QDomDocument& doc);

protected:

    QDesignViewWindow* m_pDesignViewWindow;         //!< DesignViewWindow.
    QClientWindow* m_pClientWindow;                 //!< ClientWindow.
    QList<QProjectorWindow*> m_pProjectorWindows;   //!< ProjectorWindows.
    QSceneViewerWindow* m_pSceneViewerWindow;       //!< SceneViewerWindow.
    QPreferenceDialog* m_pPreferenceDialog;         //!< PreferenceDialog.

    QDomElement m_sceneViewerSettings;              //!< SceneViewer settings.

    ProjectionModel* m_pModel;                      //!< Projection Model.
};

}; // projection

#endif // _GUICONTROLER_H_