#include "opencv2\opencv.hpp"
#include <vector>
#include <cmath>
#include <iostream>

using namespace cv;
using namespace std;


class ImgWindow {

public:

	int img_num;
	string win_name;

	Mat concat_img_;

	void init_window() {
		cv::namedWindow(this->win_name);
		cv::setMouseCallback(this->win_name, this->my_mouse_callback);
	}

	void init_member_param() {
		win_name = "window title";
	}

	ImgWindow() {

	}

	ImgWindow(const vector<Mat>& imgs) {

		init_member_param();

		img_num = imgs.size();

		// 連結した一枚を作る
		concat_(imgs);

		//
		init_window();


	}

	void concat_(const vector<Mat>& imgs) {
		int rows = imgs[0].rows;
		int cols = imgs[0].cols;
		concat_img_.create(Size(cols * imgs.size(), rows), imgs[0].type()/*CV_8UC3*/);

		Rect rect = Rect(0, 0, rows, cols);

		for (int i = 0; i < imgs.size(); ++i) {
			Mat roi(concat_img_, rect);
			imgs[i].copyTo(roi);
			rect.x += rows;
		}

#ifdef _DEBUG
		imwrite("concat.png", concat_img_);
#endif

	}

	void run()
	{
		while (true) {
			cv::imshow(win_name, concat_img_);
			if (cv::waitKey(15) == 27) {
				break;
			}
		}
	}


	// コールバック関数
	static void my_mouse_callback(int event, int x, int y, int flags, void* param) {
		//cv::Mat* image = static_cast<cv::Mat*>(param);

		switch (event) {
		case cv::EVENT_MOUSEMOVE:

			break;


		case cv::EVENT_LBUTTONDOWN:
			cout << "L button down." << endl;
			cout << "( x, y ) = (" << x << ", " << y << ")" << endl;
			break;

		case cv::EVENT_LBUTTONUP:

			break;
		}
	}
};


int main(int argc, char* argv[])
{
	int rows = 256;
	int cols = 256;

	Mat3b red = Mat3b(rows, cols, Vec3b(0, 0, 255));
	Mat3b green = Mat3b(rows, cols, Vec3b(0, 255, 0));
	Mat3b blue = Mat3b(rows, cols, Vec3b(255, 0, 0));

	vector<Mat> imgs(3);
	imgs[0] = red;
	imgs[1] = green;
	imgs[2] = blue;

	ImgWindow win(imgs);

	win.run();

	return 0;
};