// WindowsProject3.cpp : Defines the entry point for the application.
//
// https://msdn.microsoft.com/en-us/library/windows/desktop/hh298433(v=vs.85).aspx
// - How to Create a Multiline Edit Control

#include "stdafx.h"
#include "WindowsProject3.h"

#define MAX_LOADSTRING 100
#define ID_EDITCHILD 100

// Global Variables:
HINSTANCE hInst;  // current instance
WCHAR szTitle[MAX_LOADSTRING];  // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING];  //the main window class name

									  // Forward declarations of functions included in this code module:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
	_In_opt_ HINSTANCE hPrevInstance,
	_In_ LPWSTR lpCmdLine,
	_In_ int nCmdShow)
{
	UNREFERENCED_PARAMETER(hPrevInstance);
	UNREFERENCED_PARAMETER(lpCmdLine);

	// TODO: Place code here.

	// Initialize global strings
	LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadStringW(hInstance, IDC_WINDOWSPROJECT3, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// Perform application initialization:
	if (!InitInstance(hInstance, nCmdShow))
	{
		return FALSE;
	}

	HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WINDOWSPROJECT3));

	MSG msg;

	// Main message loop:
	while (GetMessage(&msg, nullptr, 0, 0))
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return (int)msg.wParam;
}

//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEXW wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = WndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WINDOWSPROJECT3));
	wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
	wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_WINDOWSPROJECT3);
	wcex.lpszClassName = szWindowClass;
	wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassExW(&wcex);
}

//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
	hInst = hInstance; // Store instance handle in our global variable

	HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

	if (!hWnd)
	{
		return FALSE;
	}

	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	return TRUE;
}

//
//   FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//   PURPOSE: Processes messages for the main window.
//
//   WM_COMMAND - process the application menu
//   WM_PAINT - Paint the main window
//   WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{

	static HWND hwndEdit;

	TCHAR lpszLatin[] = L"Lorem ipsum dolor sit amet, consectetur "
		L"adipisicing elit, sed do eiusmod tempor "
		L"incididunt ut labore et dolore magna "
		L"aliqua. Ut enim ad minim veniam, quis "
		L"nostrud exercitation ullamco laboris nisi "
		L"ut aliquip ex ea commodo consequat. Duis "
		L"aute irure dolor in reprehenderit in "
		L"voluptate velit esse cillum dolore eu "
		L"fugiat nulla pariatur. Excepteur sint "
		L"occaecat cupidatat non proident, sunt "
		L"in culpa qui officia deserunt mollit "
		L"anim id est laborum.";

	switch (message)
	{
	case WM_CREATE:
		hwndEdit = CreateWindowEx(
			0, L"EDIT",  // predefined class
			NULL,  // no window title
			WS_CHILD | WS_VISIBLE | WS_VSCROLL |
			ES_LEFT | ES_MULTILINE | ES_AUTOVSCROLL,
			0, 0, 0, 0,  // set size in WM_SIZE message
			hWnd,  // parent window
			(HMENU)ID_EDITCHILD,  // edit control ID
			(HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE),
			NULL);  // pointer not needed
		SendMessage(hwndEdit, WM_SETTEXT, 0, (LPARAM)lpszLatin);  // Add text to the window.
		return 0;

	case WM_COMMAND:
	{
		int wmId = LOWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
			/*
			case IDM_EDUNDO:
			// Send WM_UNDO only if there is something to be undone.

			if (SendMessage(hwndEdit, EM_CANUNDO, 0, 0))
			SendMessage(hwndEdit, WM_UNDO, 0, 0);
			else
			{
			MessageBox(hwndEdit,
			L"Nothing to undo.",
			L"Undo notification",
			MB_OK);
			}
			break;

			case IDM_EDCUT:
			SendMessage(hwndEdit, WM_CUT, 0, 0);
			break;

			case IDM_EDCOPY:
			SendMessage(hwndEdit, WM_COPY, 0, 0);
			break;

			case IDM_EDPASTE:
			SendMessage(hwndEdit, WM_PASTE, 0, 0);
			break;

			case IDM_EDDEL:
			SendMessage(hwndEdit, WM_CLEAR, 0, 0);
			break;
			*/

		case IDM_ABOUT:
			DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
			break;
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
	}
	break;
	case WM_SETFOCUS:
		SetFocus(hwndEdit);
		return 0;

	case WM_SIZE:
		// Make the edit control the size of the window's client area.

		MoveWindow(hwndEdit,
			0, 0,  // starting x- and y-coordinates
			LOWORD(lParam),  // width of client area
			HIWORD(lParam),  // height of client area
			TRUE);  // repaint window
		return 0;

	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	UNREFERENCED_PARAMETER(lParam);
	switch (message)
	{
	case WM_INITDIALOG:
		return (INT_PTR)TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
		{
			EndDialog(hDlg, LOWORD(wParam));
			return (INT_PTR)TRUE;
		}
		break;
	}
	return (INT_PTR)FALSE;
}