DraggingSystem.cpp
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DraggingSystem.cpp
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	//
	// Created by Ido Mozes on 09/07/2019.
	//

	#include "DraggingSystem.h"


	void DraggingSystem::update(Entities *layers, GameData &gameData) {
	if (!gameData.isDragging)
	return;
	int mouseX, mouseY;
	SDL_GetMouseState(&mouseX, &mouseY);
	mouseX = int(mouseX / gameData.mapScale);
	mouseY = int(mouseY / gameData.mapScale);
	for (int i = 0; i < N_LAYERS; ++i) {
	for (auto &entity: layers[i]) {
	if (auto components = entity->getComponents<Draggable, Visibility>()) {
	auto[draggable, visibility] = components.value();
	visibility.setPosition(mouseX - int(visibility.getDstRect()->w / 2.0),
	mouseY - int(visibility.getDstRect()->h / 2.0));
	bool freePosition = true;
	if (mouseX >= SIDEBAR_WIDTH + MAP_WIDTH or mouseX < SIDEBAR_WIDTH)
	freePosition = true;
	else
	for (int x = std::max(mouseX - SIDEBAR_WIDTH - 4, 0);
	x < std::min(mouseX - SIDEBAR_WIDTH + 5, MAP_WIDTH - 1); ++x) {
	for (int y = std::max(mouseY - 4, 0); y < std::min(mouseY + 5, MAP_HEIGHT - 1); ++y) {
	if (gameData.mapData[x][y] == OBSTACLE or gameData.mapData[x][y] == TOWER) {
	freePosition = false;
	goto setIsPlaceable;
	}
	}
	}
	setIsPlaceable:
	draggable.isPlaceable = freePosition;

	}
	}
	}
	}