#ifndef INTERFACES_H
#define INTERFACES_H

#include <QtGui>
#include <QWidget>
#include <QtXml>
//#include <QGLViewer/frame.h>

class ProjectorWidget;
class ProjectorData;

/**
 * Projector plugin interface class to have common interface with all projector plugins.
 *
 */
class ProjectorInterface
{

public:


    /**
     * Destructor (virtual because the class is pure virtual).
     *
     */
    virtual ~ProjectorInterface() {}


    /**
     * Gets the name of the plugin.
     *
     * @return The name of the plugin.
     *
     */
    virtual QString name(void) const = 0;


    /**
     * Gets the list of the available projectors.
     *
     * @return The list of the available projectors.
     *
     */
    virtual QStringList projectors(void) const = 0;


    /**
     * Instanciates a new ProjectorWidget for the specified projector.
     * This function is called by the QChannelWidget constructor, when the 
     * stackedWidget is built. 
     *
     * @param projector A const reference on a string that contains the name of
     *                  the projector, such as projectors() has returned it.
     *
     * @return A pointer on the new instanciated ProjectorWidget.
     *
     */
    virtual ProjectorWidget *newProjectorWidget(const QString& projector) = 0;


    /**
     * Instanciates a new ProjectorData for the specified projector.
     * This function is called by the Channel when it needs to create or copy 
     * some ProjectorData.
     *
     * @param projector A const reference on a string that contains the name of
     *                  the projector, such as projectors() has returned it.
     *
     * @return A pointer on the new instanciated ProjectorData.
     *
     */
    virtual ProjectorData *newProjectorData(const QString& projector) = 0;

};


/**
 * Projector data class to store informations about Projectors.
 * This class is not a pure virtual class, so projector plugins does not need to
 * instanciate it if it is not necessary.
 *
 */
class ProjectorData
{

public:


    /**
     * Constructor.
     *
     * @param plugin A pointer on the plugin that owns the projector.
     *
     */
    ProjectorData(ProjectorInterface *plugin):
	m_bShow(true),
	m_bShowArea(true),
	m_plugin(plugin)
	{
	    Q_ASSERT(NULL!=plugin);
	}


    /**
     * Copy constructor.
     *
     * @param data A const reference on the source data.
     *
     */
    ProjectorData (const ProjectorData& data)
	{
	    copy_from(data);
	}


    /**
     * Destructor.
     *
     */
    virtual ~ProjectorData() {}


    /**
     * Gets the ProjectorInterface which instanciated the ProjectorData.
     *
     * @return A pointer on the ProjectorInterface which instanciated the
     *         ProjectorData.
     *
     */
    ProjectorInterface* plugin() {return m_plugin;}


    /**
     * Gets the ProjectorInterface which instanciated the ProjectorData.
     * This fonction differs from the previous one by the "const" attribute.
     *
     * @return A const pointer on the ProjectorInterface which instanciated the
     *         ProjectorData.
     *
     */
    const ProjectorInterface* plugin() const {return m_plugin;}


    /**
     * Draws the projector.
     * This method draws the geometric projector data. For instance, for a 
     * standard projector, it draws the frustum in the scene.
     *
     * @param bSelected true if the projector is selected.
     *
     */
    virtual void draw(bool bSelected) {Q_UNUSED(bSelected);}


    /**
     * Starts the rendering through the projector.
     * For a standard projector, this is the call to 'glFrustum()'.
     *
     */
    virtual void beginDraw(void){}


    /**
     * Ends the rendering through the projector.
     * For a standard projector, this is the call to 'glPop...()'.
     * This method restores the state of OpenGL before the call to beginDraw().
     *
     */
    virtual void endDraw(void){}


    /**
     * Starts the projection of the image.
     * This is used by Screen::draw(source) when source is 
     * PROJECT_SOURCE_PROJECTORAREA or PROJECT_SOURCE_EXPORT_BLENDING
     *
     */
    virtual void beginProjection(void){}


    /**
     * Ends the projection of the image.
     * This is used by Screen::draw(source) when source is 
     * PROJECT_SOURCE_PROJECTORAREA or PROJECT_SOURCE_EXPORT_BLENDING
     *
     */
    virtual void endProjection(void){}


    /**
     * Sets the VisibleFar distance parameter.
     *
     * The Visible Far dist is used for the representation of the projector from
     * outside. The name comes from the frustum case, but it is used for any
     * kind of projector now.
     *
     * @param farDist The new visible-far distance.
     *
     */
    virtual void setVisibleFar(float farDist) {Q_UNUSED(farDist);}


    /**
     * Copies the data from a ProjectorData.
     *
     * @param data A const-reference on the data to be copied.
     *
     * @return true if the copy suceeds, false otherwise.
     *
     */
    virtual bool copy_from(const ProjectorData& data) {Q_ASSERT(m_plugin==data.m_plugin); m_bShow=data.m_bShow; m_bShowArea=data.m_bShowArea; return true;}


    /**
     * Check if 2 datas are equal.
     *
     * @param data A const-reference on the data to be checked.
     * @return true if the datas are the same, false otherwise.
     *
     */
    virtual bool is_equal_to(const ProjectorData& data) const {return m_plugin==data.m_plugin && m_bShow==data.m_bShow && m_bShowArea==data.m_bShowArea;}


    /**
     * Sets the Show parameter.
     *
     * @param bShow The new Show parameter.
     *
     */
    void setShow(bool bShow) {m_bShow = bShow;}


    /**
     * Gets the Show parameter.
     *
     * @return The Show parameter.
     *
     */
    bool getShow() const {return m_bShow;}


    /**
     * Sets the ShowArea parameter.
     *
     * @param bShow The new ShowArea parameter.
     *
     */
    void setShowArea(bool bShowArea) {m_bShowArea = bShowArea;}


    /**
     * Gets the ShowArea parameter.
     *
     * @return The ShowArea parameter.
     *
     */
    bool getShowArea() const {return m_bShowArea;}


    /**
     * Restore the export settings from XML data.
     *
     * @param element Parent XML element of the export settings data.
     *
     */
    virtual void initFromDOMElement(const QDomElement& element) {if (!element.isNull()) {m_bShow=element.attribute("show").toLower()=="true"; m_bShowArea=element.attribute("showArea").toLower()=="true";}}


    /**
     * Store the current export settings as XML data.
     *
     * @param name XML node name of the data.
     * @param doc XML document to store the data.
     *
     * @return Current export settings data as XML data.
     *
     */
    virtual QDomElement domElement(const QString& name, QDomDocument& doc) const { QDomElement de = doc.createElement(name); de.setAttribute("show", (m_bShow?"true":"false")); de.setAttribute("showArea", (m_bShowArea?"true":"false")); return de;}


    /**
     * Gets the projector name.
     * This is the name that is in the projector list of the
     * ProjectorInterface::projectors().
     *
     * @return The name of the projector.
     *
     */
    virtual const QString& projector(void) const = 0;


    /**
     * Gets the projector full name.
     * This name can be used in the interface of Projection Designer to define in a unique way the projector.
     *
     * @return the fullname of the projector.
     *
     */
    QString getFullName(void) const {
	Q_ASSERT(m_plugin);
	QString projector_fullname = projector();
	projector_fullname += " (";
	projector_fullname += m_plugin->name();
	projector_fullname += ")";
	return projector_fullname;
    }

protected:
    bool m_bShow; ///< Visibility flag
    bool m_bShowArea; ///< Area visibility flag

private:
    ProjectorInterface *m_plugin; ///< The ProjectorInterface in which the projector is.
};


/**
 * Projector widget class implementation.
 *
 * The ProjectorWidget is used by the ChannelWidget, for the Projector part of
 * each channel. Concerning the interface, the channel manager has a
 * stackedWidget and a combo that are linked together. When the combo changes,
 * the stackedWidget also changes. This defines the kind of projector to be used
 * for the channel. The default plugin offers the frustum camera.
 *
 * Each widget has its own data. They can be retrieved using data().
 *
 */
class ProjectorWidget: public QWidget
{
	Q_OBJECT

public:


    /**
     * Default constructor.
     *
     */
    ProjectorWidget(ProjectorInterface *plugin=NULL, QWidget* pParent=0, Qt::WFlags flag=0): QWidget(pParent, flag), m_plugin(plugin) {Q_ASSERT(NULL!=plugin);}


    /**
     * Destructor.
     *
     */
    virtual ~ProjectorWidget() {}


    /**
     * Gets the projector interface associated with the widget.
     *
     * @return The associated projector interfacec.
     *
     */
    ProjectorInterface* plugin() {return m_plugin;}


    /**
     * Updates the GUI.
     *
     * This method *must* be implemented by derived classes.
     *
     * @param data The data used to update the GUI. The data can be NULL. In 
     *             this case, the current data are used.
     *
     */
    virtual void updateGUI(const ProjectorData* data) = 0;


    /**
     * Clears the widget.
     *
     * This can be used before disabling the widget.
     *
     */
    virtual void clear(void) = 0;


    /**
     * Gets the data of the widget.
     *
     * @return The widget data.
     *
     */
    virtual const ProjectorData& data(void) const = 0;


signals:


    /**
     * Notify that data has changed.
     *
     * @param data The new data.
     *
     */
    virtual void dataChanged(const ProjectorData&)=0;


private:


    ProjectorInterface *m_plugin; ///< The ProjectorInterface that owns the Widget.

};

Q_DECLARE_INTERFACE(ProjectorInterface,
                    "jp.orihalcon.projdesigner.ProjectorInterface/1.0");



//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


class SceneContent;
class SceneWidget;

/**
 * Scene Plugin Interface Implementation.
 *
 */
class SceneInterface
{

public:


    /**
     * Destructor.
     *
     */
    virtual ~SceneInterface() {}


    /**
     * Gets the name of the Interface.
     *
     * This name must be unique, to avoid conflicting plugins, just like the
     * name of the interface is unique to avoid conflicting interfaces.
     *
     * @return The name of the interface.
     *
     */
    virtual QString name(void) const = 0;


    /**
     * Gets the list of the available scenes.
     *
     * @return The list of the available scenes.
     *
     */
    virtual QStringList scenes(void) const = 0;


    /**
     * Instanciates a new SceneContent for the specified scene.
     *
     * @param scene A const reference on a string that contains the name of the
     *              scene, such as projectors() has returned it.
     *
     * @return A pointer on the new instanciated SceneContent.
     *
     */
    virtual SceneContent *newSceneContent(const QString& scene) = 0;


    /**
     * Instanciates a new SceneWidget for the specified scene.
     *
     * @param scene A const reference on a string that contains the name of
     *              the scene, such as scenes() has returned it.
     *
     * @return A pointer on the new instanciated SceneWidget.
     *
     */
    virtual SceneWidget *newSceneWidget(const QString& scene) = 0;

};

/**
 * Scene content class to store informations about Scenes.
 * This class is not a pure virtual class, so scene plugins does not need to
 * instanciate it if it is not necessary.
 *
 */
class SceneContent
{
public:


    /**
     * Constructor.
     *
     * @param plugin A pointer on the plugin that owns the projector.
     *
     */
    SceneContent(SceneInterface *plugin): m_plugin(plugin) {Q_ASSERT(NULL!=plugin);}


    /**
     * Copy constructor.
     *
     * @param data A const reference on the source content.
     *
     */
    SceneContent (const SceneContent& content) {copy_from(content);}


    /**
     * Destructor.
     *
     */
    virtual ~SceneContent() {}


    /**
     * Gets the SceneInterface which instanciated the SceneContent.
     *
     * @return A pointer on the SceneInterface which instanciated the
     *         SceneContent.
     *
     */
    SceneInterface* plugin() {return m_plugin;}


    /**
     * Gets the SceneInterface which instanciated the SceneContent.
     * This fonction differs from the previous one by the "const" attribute.
     *
     * @return A const pointer on the SceneInterface which instanciated the
     *         SceneContent.
     *
     */
    const SceneInterface* plugin() const {return m_plugin;}


    /**
     * Copies the content from a SceneContent.
     *
     * @param content A const-reference on the content to be copied.
     *
     * @return true if the copy suceeds, false otherwise.
     *
     */
    virtual bool copy_from(const SceneContent& content) {Q_ASSERT(m_plugin==content.m_plugin); Q_UNUSED(content); return true;}


    /**
     * Check if 2 contents are equal.
     *
     * @param content A const-reference on the content to be checked.
     * @return true if the contents are the same, false otherwise.
     *
     */
    virtual bool is_equal_to(const SceneContent& content) const {return m_plugin==content.m_plugin;}


    /**
     * Restore the export settings from XML content.
     *
     * @param element Parent XML element of the export settings content.
     *
     */
    virtual void initFromDOMElement(const QDomElement& element) {if (!element.isNull()) {}}


    /**
     * Store the current export settings as XML content.
     *
     * @param name XML node name of the content.
     * @param doc XML document to store the content.
     *
     * @return Current export settings content as XML content.
     *
     */
    virtual QDomElement domElement(const QString& name, QDomDocument& doc) const { QDomElement de = doc.createElement(name); de.setAttribute("name", getFullName()); return de;}


    /**
     * Gets the scene name.
     * This is the name that is in the scene list of the
     * SceneInterface::scenes().
     *
     * @return the name of the scene.
     *
     */
    virtual const QString& scene_name(void) const = 0;


    /**
     * Gets the scene full name.
     * This name can be used in the interface of Projection Designer to define in a unique way the scene.
     *
     * @return The fullname of the scene.
     *
     */
    QString getFullName(void) const {
	Q_ASSERT(m_plugin);
	QString scene_fullname = scene_name();
	scene_fullname += " (";
	scene_fullname += m_plugin->name();
	scene_fullname += ")";
	return scene_fullname;
    }


    /**
     * Draws the scene.
     * This method draws the geometric scene content. For instance, for a 
     * standard scene, it draws the frustum in the scene.
     *
     */
    virtual void draw(QGLWidget *glWidget, const float* cameraMatrix) {Q_UNUSED(glWidget);Q_UNUSED(cameraMatrix);}


    /**
     * Resets the content.
     *
     * This method was added for the grids, to fix the fact that a
     * "New project" did not clear the grids.
     *
     */
    virtual void reset (void)=0;

private:
    SceneInterface *m_plugin; ///< The SceneInterface in which the scene is.
};

/**
 * Scene widget class implementation.
 *
 * Each widget has its own content. They can be retrieved using content().
 *
 */
class SceneWidget: public QWidget
{
	Q_OBJECT
public:


    /**
     * Default constructor.
     *
     */
    SceneWidget(SceneInterface *plugin=NULL, QWidget* pParent=0, Qt::WFlags flag=0): QWidget(pParent, flag), m_plugin(plugin) {Q_ASSERT(NULL!=plugin);}


    /**
     * Destructor.
     *
     */
    virtual ~SceneWidget() {}


    /**
     * Gets the scene interface associated with the widget.
     *
     * @return The associated scene interfacec.
     *
     */
    SceneInterface* plugin() {return m_plugin;}


    /**
     * Updates the GUI.
     *
     * This method *must* be implemented by derived classes.
     *
     * @param content The content used to update the GUI. The content can be 
     *                NULL. In this case, the current content are used.
     *
     */
    virtual void updateGUI(const SceneContent* data) = 0;


    /**
     * Gets the content of the widget.
     *
     * @return The widget content.
     *
     */
    virtual const SceneContent& content(void) const = 0;


signals:


    /**
     * Notify that contents have changed.
     *
     * @param data The new contents.
     *
     */
    virtual void dataChanged(const SceneContent&)=0;

private:


    SceneInterface *m_plugin; ///< The SceneInterface that owns the Widget.

};

Q_DECLARE_INTERFACE(SceneInterface,
                    "jp.orihalcon.projdesigner.SceneInterface/1.0");

#endif