win32_step_14 - 8BitsCoding/RobotMentor GitHub Wiki

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LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	if (uMsg == WM_PAINT) {
		PAINTSTRUCT ps;
		HDC h_dc = BeginPaint(hWnd, &ps);

		for (int i = 0; i < MAX_COUNT; i++) {
			Rectangle(h_dc, i * 100, 0, 101 + i * 100, 101);
			Rectangle(h_dc, i * 100, 100, 101 + i * 100, 200);
		}

		// 설명을 위한 작은 네모 
		HGDIOBJ h_old_brush = SelectObject(h_dc, GetStockObject(NULL_BRUSH));

		for (int i = 0; i < MAX_COUNT; i++) {
			Rectangle(h_dc, i * 100 - 40, 5, 101 + i * 100 - 50, 95);
		}

		SelectObject(h_dc, GetStockObject(BLACK_BRUSH));

		for (int i = 0; i < MAX_COUNT; i++) {
			if (g_index[i] == 1)	Ellipse(h_dc, i * 100 + 50, 50, 101 + i * 100 + 50, 150);
		}
		
		SelectObject(h_dc, h_old_brush);

		EndPaint(hWnd, &ps);
		return 0;
	}
	else if (uMsg == WM_LBUTTONDOWN) {
		UINT x = LOWORD(lParam);
		UINT y = HIWORD(lParam);

		if (y >= 0 && y < 100) {
			//UINT index = x / 100;
			UINT index = (x + 50) / 100;
			if (index < MAX_COUNT) {
				/*
				int remain = x % 100;
				if (remain < 50) index++;
				*/
				g_index[index] = !g_index[index];
				InvalidateRect(hWnd, NULL, TRUE);
			}
		}
	}
	else if (uMsg == WM_DESTROY) PostQuitMessage(0);

	
	return DefWindowProc(hWnd, uMsg, wParam, lParam);
}