MouseEventListener.h

// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
 
#pragma once
#include <kiwano/event/MouseEvent.h>
#include <kiwano/event/listener/EventListener.h>
 
namespace kiwano
{
 
class KGE_API MouseEventListener : public EventListener
{
public:
    virtual void OnMouseMoving(const Point& pos) {}
 
    virtual void OnMouseDown(const Point& pos, MouseButton button) {}
 
    virtual void OnMouseUp(const Point& pos, MouseButton button) {}
 
    virtual void OnMouseWheelScrolling(const Point& pos, float wheel) {}
 
    void Handle(Event* evt) override;
};
 
class KGE_API MouseDragEventListener : public EventListener
{
public:
    MouseDragEventListener();
 
    virtual bool OnDragStart(const Point& pos, MouseButton button)
    {
        return true;
    }
 
    virtual void OnDragging(const Point& offset, MouseButton button) {}
 
    virtual void OnDragEnd(const Point& pos, MouseButton button) {}
 
    bool IsDragging(MouseButton button);
 
    Point GetDragPoint(MouseButton button);
 
    void Handle(Event* evt) override;
 
private:
    void SetDragging(MouseButton button, bool dragging);
 
    void SetDragPoint(MouseButton button, Point pos);
 
    Point GetDragPrevPoint(MouseButton button);
 
    void SetDragPrevPoint(MouseButton button, Point pos);
 
private:
    enum : int
    {
        MouseButtonNum = 3
    };
 
    bool  is_dragging_[MouseButtonNum];
    Point drag_point_[MouseButtonNum];
    Point drag_prev_point_[MouseButtonNum];
};
 
}  // namespace kiwano