/******************************************************************************
    QtAV Player Demo:  this file is part of QtAV examples
    Copyright (C) 2012-2014 Wang Bin <wbsecg1@gmail.com>

*   This file is part of QtAV

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/

#ifndef PROPERTYEDITOR_H
#define PROPERTYEDITOR_H

#include <QObject>
#include <QtCore/QMetaProperty>
#include <QtCore/QMetaEnum>

class QAction;
class QWidget;
class PropertyEditor : public QObject
{
    Q_OBJECT
public:
    explicit PropertyEditor(QObject *parent = 0);
    // call it before others
    void getProperties(QObject *obj);

    // from config file etc to init properties. call it before buildXXX
    void set(const QVariantHash& hash);
    void set(const QString& conf);
    /*!
     * \brief buildOptions
     * \return command line options
     */
    QString buildOptions();
    QWidget* buildUi(QObject* obj = 0); //obj: read dynamic properties("detail_property")
    QVariantHash exportAsHash();
    QString exportAsConfig(); //json like

private:
    /*!
     * name is property name.
     * 1. add property and value in hash
     * 2. add a widget and set value
     * 3. connect widget value change signal to a slot
     */
    QWidget* createWidgetForFlags(const QString& name, const QVariant& value, QMetaEnum me, const QString& detail = QString(), QWidget* parent = 0);
    QWidget* createWidgetForEnum(const QString& name, const QVariant& value, QMetaEnum me, const QString& detail = QString(), QWidget* parent = 0);
    QWidget* createWidgetForInt(const QString& name, int value, const QString& detail = QString(), QWidget* parent = 0);
    QWidget* createWidgetForReal(const QString& name, qreal value, const QString& detail = QString(), QWidget* parent = 0);
    QWidget* createWidgetForText(const QString& name, const QString& value, bool readOnly, const QString& detail = QString(), QWidget* parent = 0);
    QWidget* createWidgetForBool(const QString& name, bool value, const QString& detail = QString(), QWidget* parent = 0);

    // called if value changed by ui (in onXXXChange)
    void updatePropertyValue(const QString& name, const QVariant& value);
private slots:
    // updatePropertyValue
    void onFlagChange(QAction *action);
    void onEnumChange(int value);
    void onIntChange(int value);
    void onRealChange(qreal value);
    void onTextChange(const QString& value);
    void onBoolChange(bool value);

private:
    QList<QMetaProperty> mMetaProperties;
    QVariantHash mProperties;
};

#endif // PROPERTYEDITOR_H