scrollbar.h

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/* xoreos - A reimplementation of BioWare's Aurora engine
 *
 * xoreos is the legal property of its developers, whose names
 * can be found in the AUTHORS file distributed with this source
 * distribution.
 *
 * xoreos 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.
 *
 * xoreos 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 xoreos. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef ENGINES_NWN_GUI_WIDGETS_SCROLLBAR_H
#define ENGINES_NWN_GUI_WIDGETS_SCROLLBAR_H

#include <vector>

#include "src/graphics/guielement.h"

#include "src/graphics/aurora/texturehandle.h"

#include "src/engines/nwn/gui/widgets/nwnwidget.h"

namespace Engines {

namespace NWN {

class GUI;

class Scrollbar : public Graphics::GUIElement {
public:
    enum Type {
        kTypeVertical,  
        kTypeHorizontal 
    };

    Scrollbar(Type type);
    ~Scrollbar();

    void setPosition(float x, float y, float z);

    void getPosition(float &x, float &y, float &z) const;

    bool isIn(float x, float y) const;

    void setLength(float length);

    float getWidth () const; 
    float getHeight() const; 

    // Renderable
    void calculateDistance();
    void render(Graphics::RenderPass pass);

private:
    struct Quad {
        float vX[4], vY[4];
        float tX[4], tY[4];
    };

    Type _type;

    float _x;
    float _y;
    float _z;

    float _length;

    std::vector<Quad> _quads;

    Graphics::Aurora::TextureHandle _texture;

    void createV(); 
    void createH(); 
};

class WidgetScrollbar : public NWNWidget {
public:
    WidgetScrollbar(::Engines::GUI &gui, const Common::UString &tag,
                    Scrollbar::Type type, float range);
    ~WidgetScrollbar();

    void show();
    void hide();

    void setPosition(float x, float y, float z);

    void setLength(float length);

    float getState() const;
    void setState(float state);

    float getWidth () const;
    float getHeight() const;

    float getBarPosition() const;

    void mouseDown(uint8 state, float x, float y);
    void mouseMove(uint8 state, float x, float y);
    void mouseWheel(uint8 state, int x, int y);

private:
    Scrollbar::Type _type;

    bool _full;

    float _range;
    float _length;
    float _state;

    float _dragX;
    float _dragY;
    float _dragState;

    Scrollbar _scrollbar;
};

} // End of namespace NWN

} // End of namespace Engines

#endif // ENGINES_NWN_GUI_WIDGETS_SCROLLBAR_H