viseq/src/draggable.h

#pragma once

#include "moveable.h"
#include "raylib.h"
#include "selectable.h"
#include "state.h"
#include "vmath.h"

namespace VISEQ::BASE {
	class Draggable : public Movable, public Selectable{
		public:
			Draggable() {}
			Draggable(float x, float y) : Movable(Vec2Df(x, y), 960.0f) {}
			Draggable(Vec2Df p) : Movable(p, 960.0f) {}
			virtual ~Draggable() {}

			Vec2Df drag_offset;

			bool picked_up = false;

			virtual bool pickedUp() {
				if(clicked() && held() && (state->istate == APP::InteractionState::HOVER_NODE || state->istate == APP::InteractionState::DRAG_NODE)) {
					picked_up = true;
					drag_offset = position - state->screen_mouse; 
				}
				return picked_up;
			}

			virtual void drag() {
				if(state->keys_down.ctrl){
					position = state->mod_mouse;
				} else {
					position = state->mod_mouse + drag_offset;
				}
			}

			virtual void putDown(){
				picked_up = false;
			}

			virtual void select() override {
				selected = (state->keys_down.shift && selected) || CheckCollisionPointRec(position, state->selection);
			}

			virtual void update() override {
				if((held() && !picked_up) || (clicked() && !state->keys_down.shift)) select();
				if(entered()) state->istate = APP::InteractionState::HOVER_NODE;
				if(exited()) state->istate = APP::InteractionState::HOVER_CANVAS;
				if(pickedUp()){
					drag();
					state->istate = APP::InteractionState::DRAG_NODE;
				}
				if(released() && picked_up){
					putDown();
					state->istate = APP::InteractionState::HOVER_CANVAS;
				}
			}
	};
}