/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2014 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * This library 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
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGUI_TABWIDGET
#define OSGUI_TABWIDGET

#include <osgUI/Popup>
#include <osg/Switch>
#include <osgText/Text>

namespace osgUI
{

class OSGUI_EXPORT Tab : public osg::Object
{
public:

    Tab() {}
    Tab(const std::string& str) : _text(str) {}

    Tab(const Tab& item, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY) : osg::Object(item,copyop), _text(item._text) {}

    META_Object(osgUI, Tab);

    void setText(const std::string& text) { _text = text; }
    std::string& getText() { return _text; }
    const std::string& getText() const { return _text; }

    void setWidget(osgUI::Widget* widget) { _widget = widget; }
    osgUI::Widget* getWidget() { return _widget.get(); }
    const osgUI::Widget* getWidget() const { return _widget.get(); }

protected:
    virtual ~Tab() {}

    std::string                 _text;
    osg::ref_ptr<osgUI::Widget> _widget;
};

class OSGUI_EXPORT TabWidget : public osgUI::Widget
{
public:
    TabWidget();
    TabWidget(const TabWidget& combobox, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
    META_Node(osgUI, TabWidget);

    void addTab(Tab* item) { _tabs.push_back(item); dirty(); }

    void setTab(unsigned int i, Tab* item) { _tabs[i] = item; dirty(); }
    Tab* getTab(unsigned int i) { return _tabs[i].get(); }
    const Tab* getTab(unsigned int i) const { return _tabs[i].get(); }

    void clear() { _tabs.clear(); dirty(); }
    void removeTab(unsigned int i) { _tabs.erase(_tabs.begin()+i); dirty(); }
    unsigned int getNumTabs() { return static_cast<unsigned int>(_tabs.size()); }

    typedef std::vector< osg::ref_ptr<Tab> > Tabs;

    void setTabs(const Tabs& items) { _tabs = items; }
    Tabs& getTabs() { return _tabs; }
    const Tabs& getTabs() const { return _tabs; }

    void setCurrentIndex(unsigned int i);
    unsigned int getCurrentIndex() const { return _currentIndex; }

    virtual void currrentIndexChanged(unsigned int i);
    virtual void currentIndexChangedImplementation(unsigned int i);


    virtual bool handleImplementation(osgGA::EventVisitor* ev, osgGA::Event* event);
    virtual void createGraphicsImplementation();
    virtual void enterImplementation();
    virtual void leaveImplementation();

protected:
    virtual ~TabWidget() {}

    void _activateWidgets();

    osg::Node* _createTabFrame(const osg::BoundingBox& extents, osgUI::FrameSettings* fs, const osg::Vec4& color);
    osg::Node* _createTabHeader(const osg::BoundingBox& extents, osgUI::FrameSettings* fs, const osg::Vec4& color);

    Tabs                        _tabs;
    unsigned int                _currentIndex;

    osg::ref_ptr<osg::Switch>   _inactiveHeaderSwitch;
    osg::ref_ptr<osg::Switch>   _activeHeaderSwitch;
    osg::ref_ptr<osg::Switch>   _tabWidgetSwitch;
};

}

#endif
