ofxOuiDraggableButton.hpp

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/*
 * ofxOuiDraggableButton.hpp
 *
 * Draggable button
 *
 * This code has been authored by Jules Francoise <jfrancoi@sfu.ca>
 * during his postdoc contract at Simon Fraser University (MovingStories
 * project).
 * See:
 *    http://julesfrancoise.com/
 *    http://movingstories.ca/
 *
 * Copyright (C) 2016 Jules Francoise.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#ifndef ofxOuiDraggableButton_hpp
#define ofxOuiDraggableButton_hpp

#include "ofxOuiButton.hpp"

namespace ofxOui {

class DraggableButton : public Button {
  public:
    class DropEvent : public ofEventArgs {
      public:
        DropEvent(DraggableButton *sender_, int x_, int y_);

        DraggableButton *sender;

        int x;

        int y;
    };

    DraggableButton(int x_ = 0, int y_ = 0, int width_ = 0, int height_ = 0);

    virtual ~DraggableButton();

    template <typename T, typename args, class ListenerClass>
    void onDrop(T *owner, void (ListenerClass::*listenerMethod)(args)) {
        using namespace std::placeholders;
        if (owner)
            drop_event_callback_ = std::bind(listenerMethod, owner, _1);
        else
            drop_event_callback_ = nullptr;
    }

    virtual void setReferencePosition();

  protected:
    virtual void mousePressed(ofMouseEventArgs &e);
    virtual void mouseDragged(ofMouseEventArgs &e);
    virtual void mouseReleased(ofMouseEventArgs &e);

    bool mouse_pressed_inside_;
    bool dragging_;
    ofPoint mouse_offset_;
    ofPoint reference_position_;
    std::function<void(DraggableButton::DropEvent &)> drop_event_callback_;
};
}

#endif