lib/widgets/qpanel.h

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/****************************************************************************
**
** Copyright (C) 2006-2009 fullmetalcoder <fullmetalcoder@hotmail.fr>
**
** This file is part of the Edyuk project <http://edyuk.org>
** 
** This file may be used under the terms of the GNU General Public License
** version 3 as published by the Free Software Foundation and appearing in the
** file GPL.txt included in the packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef _QPANEL_H_
#define _QPANEL_H_

#include "qce-config.h"

#include <QHash>
#include <QWidget>
#include <QPointer>

class QPainter;
class QPaintEvent;

class QEditor;
class QPanelCreator;

class QCE_EXPORT QPanel : public QWidget
{
    Q_OBJECT
    
    public:
        QPanel(QWidget *p = 0);
        virtual ~QPanel();
        
        virtual QString id() const = 0;
        virtual QString type() const = 0;
        
        QEditor* editor();
        void attach(QEditor *e);
        
        virtual bool shallShow() const;
        
        bool defaultVisibility() const;
        void setDefaultVisibility(bool on);
        
        static QPanel* panel(const QString& id, QWidget *p = 0);
        static void registerCreator(QPanelCreator *c);
        
    protected:
        virtual bool forward(QMouseEvent *e);
        
        virtual void editorChange(QEditor *e);
        
        virtual void mouseMoveEvent(QMouseEvent *e);
        virtual void mousePressEvent(QMouseEvent *e);
        virtual void mouseReleaseEvent(QMouseEvent *e);
        
        virtual void showEvent(QShowEvent *e);
        virtual void hideEvent(QHideEvent *e);
        virtual void paintEvent(QPaintEvent *e);
        virtual void paint(QPainter *p, QEditor *e);
        
    private:
        QPointer<QEditor> m_editor;
        bool m_defaultVisibility, m_shownOnce;
        static QHash<QString, QPanelCreator*>& creators();
};

class QPanelCreator
{
    public:
        virtual ~QPanelCreator() {}
        virtual QString id() const = 0;
        virtual QPanel* panel(QWidget *p) = 0;
};

#define Q_PANEL(T, SID)                                 \
    public:                                             \
    class Creator : public QPanelCreator                \
    {                                                   \
        public:                                         \
            virtual QString id() const                  \
            {                                           \
                return SID;                             \
            }                                           \
                                                        \
            virtual QPanel* panel(QWidget *p)           \
            {                                           \
                return new T(p);                        \
            }                                           \
                                                        \
            static QPanelCreator* instance()            \
            {                                           \
                static Creator global;                  \
                return &global;                         \
            }                                           \
                                                        \
            Creator() {}                                \
            virtual ~Creator() {}                       \
    };                                                  \
                                                        \
    QString id() const { return SID; }                  \
                                                        \
    static void _register()                             \
    {                                                   \
        QPanel::registerCreator(Creator::instance());   \
    }                                                   \
    

#define Q_PANEL_ID(T)                                   \
    T::Creator::instance()->id()                        \
    

#define Q_CREATE_PANEL(T)                               \
    QPanel::panel(Q_PANEL_ID(T))                        \
    

#endif // _QPANEL_H_

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