MouseEvent.h

/* 
   Copyright (C) 2015 Marc Boris Duerner 
   Copyright (C) 2015 Laurentiu-Gheorghe Crisan
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
   
   As a special exception, you may use this file as part of a free
   software library without restriction. Specifically, if other files
   instantiate templates or use macros or inline functions from this
   file, or you compile this file and link it with other files to
   produce an executable, this file does not by itself cause the
   resulting executable to be covered by the GNU General Public
   License. This exception does not however invalidate any other
   reasons why the executable file might be covered by the GNU Library
   General Public License.
   
   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 GNU
   Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
   MA 02110-1301 USA
*/

#ifndef Pt_Forms_MouseEvent_h
#define Pt_Forms_MouseEvent_h

#include <Pt/Forms/Api.h>
#include <Pt/Forms/Widget.h>
#include <Pt/Gfx/Point.h>
#include <Pt/Event.h>

namespace Pt {

namespace Forms {

class MouseButton
{
    public:
        enum Type
        {
            Left = 0,
            Right = 1,
            Middle = 2,
        };

        MouseButton(Type type = Left)
        : _type(type)
        { }

        operator Pt::uint32_t() const
        { 
            return _type; 
        }

    private:
        Pt::uint32_t _type;
};


class MouseState
{
    public:
        MouseState()
        : _buttonState(0)
        { }

        bool isPressed(MouseButton button) const
        {
             Pt::uint32_t mask = 0x1 << button;
             return (_buttonState & mask) == mask;
        }

        void setPressed(MouseButton button)
        {
            Pt::uint32_t mask = 0x1 << button;
            _buttonState |= mask;
        }

        bool isReleased(MouseButton button) const
        {
             Pt::uint32_t mask = 0x1 << button;
             return (_buttonState & mask) != mask;
        }

        void setReleased(MouseButton button)
        {
            Pt::uint32_t mask = 0x1 << button;
            _buttonState &= (~mask);
        }
    private:
        Pt::uint32_t _buttonState;
};


class MouseEvent : public Pt::BasicEvent<MouseEvent>
{
    public:    
        enum Action
        {
            Move = 0,
            Press = 1,
            Release = 2
        };

        enum Button
        {
            Left = 0,
            Right = 1,
            Middle = 2,
        };

        explicit MouseEvent()
        : _widgetId_(0)
        , _widget(0)
        , _pos(0, 0)
        , _action(Move)
        , _buttonState(0)
        , _button(0)
        { }

        explicit MouseEvent(Widget& widget)
        : _widgetId_( widget.id() )
        , _widget(&widget)
        , _pos(0, 0)
        , _action(Move)
        , _buttonState(0)
        , _button(0)
        { }

        Pt::uint64_t widgetId() const
        {
            return _widgetId_;
        }

        Widget* widget() const
        {
            return _widget;
        }

        void setWidget(Widget* widget)
        {
            _widget = widget;
            _widgetId_ = widget ? widget->id() : 0;
        }
        
        const Gfx::PointF& position() const
        {
            return _pos;
        }

        void setPosition(const Gfx::PointF& pos)
        {
            _pos = pos;
        }

        double x() const
        {
            return _pos.x();
        }

        void setX(double x)
        {
            _pos.setX(x);
        }

        double y() const
        {
            return _pos.y();
        }
    
        void setY(double y)
        {
            _pos.setY(y);
        }

        bool isMove() const
        {
            return _action == Move;
        }

        void setMove()
        {
            _action = Move;
            _button = 0;
        }

        bool isPressed(Pt::uint32_t button = Left) const
        {
             Pt::uint32_t mask = 0x1 << button;
             return (_buttonState & mask) == mask;
        }

        bool isPress(Pt::uint32_t button = Left) const
        {
             Pt::uint32_t mask = 0x1 << button;
             return (_button & mask) == mask && _action == Press;
        }

        void setPress(Pt::uint32_t button = Left)
        {
            Pt::uint32_t mask = 0x1 << button;

            _action = Press;
            _button = mask;
            _buttonState |= mask;
        }

        bool isReleased(Pt::uint32_t button = Left) const
        {
             Pt::uint32_t mask = 0x1 << button;
             return (_buttonState & mask) != mask;
        }

        bool isRelease(Pt::uint32_t button = Left) const
        {
             Pt::uint32_t mask = 0x1 << button;
             return (_button & mask) == mask && _action == Release;
        }

        void setRelease(Pt::uint32_t button = Left)
        {
            Pt::uint32_t mask = 0x1 << button;

            _action = Release;
            _button = mask;
            _buttonState &= (~mask);
        }

    private:
        Pt::uint64_t  _widgetId_;
        Widget*       _widget;
        Gfx::PointF   _pos;
        Action        _action;
        Pt::uint32_t  _buttonState;
        Pt::uint32_t  _button;
};

} // namespace

} // namespace

#endif