#include "AboutDialog.h"
#include "Globals.h"
#include "MainWindow.h"
#include "Resource.h"

/* Main window class and title */
static LPCTSTR MainWndClass = TEXT("Win32 Example Application");

/* Window procedure for our main window */
LRESULT CALLBACK MainWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
	{
	switch (msg)
		{
		case WM_COMMAND:
			{
			WORD id = LOWORD(wParam);

			switch (id)
				{
				case ID_HELP_ABOUT:
					{
					ShowAboutDialog(hWnd);
					return 0;
					}

				case ID_FILE_EXIT:
					{
					DestroyWindow(hWnd);
					return 0;
					}
				}
			break;
			}

		case WM_GETMINMAXINFO:
			{
			/* Prevent our window from being sized too small */
			MINMAXINFO *minMax = (MINMAXINFO*) lParam;
			minMax->ptMinTrackSize.x = 220;
			minMax->ptMinTrackSize.y = 110;

			return 0;
			}

			/* Item from system menu has been invoked */
		case WM_SYSCOMMAND:
			{
			WORD id = LOWORD(wParam);

			switch (id)
				{
				/* Show "about" dialog on about system menu item */
				case ID_HELP_ABOUT:
					{
					ShowAboutDialog(hWnd);
					return 0;
					}
				}
			break;
			}

		case WM_DESTROY:
			{
			PostQuitMessage(0);
			return 0;
			}
		}

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

/* Register a class for our main window */
BOOL RegisterMainWindowClass()
	{
	WNDCLASSEX wc;

	/* Class for our main window */
	wc.cbSize = sizeof(wc);
	wc.style = 0;
	wc.lpfnWndProc = &MainWndProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = g_hInstance;
	wc.hIcon = (HICON) LoadImage(g_hInstance, MAKEINTRESOURCE(IDI_APPICON),
			IMAGE_ICON, 0, 0, LR_DEFAULTSIZE | LR_DEFAULTCOLOR | LR_SHARED);
	wc.hCursor = (HCURSOR) LoadImage(NULL, IDC_ARROW, IMAGE_CURSOR, 0, 0,
			LR_SHARED);
	wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
	wc.lpszMenuName = MAKEINTRESOURCE(IDR_MAINMENU);
	wc.lpszClassName = MainWndClass;
	wc.hIconSm = (HICON) LoadImage(g_hInstance, MAKEINTRESOURCE(IDI_APPICON),
			IMAGE_ICON, 16, 16, LR_DEFAULTCOLOR);

	return (RegisterClassEx(&wc)) ? TRUE : FALSE;
	}

/* Create an instance of our main window */
HWND CreateMainWindow()
	{
	/* Create instance of main window */
	HWND hWnd = CreateWindowEx(0, MainWndClass, MainWndClass,
			WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 640, 480, NULL,
			NULL, g_hInstance, NULL);

	if (hWnd)
		{
		/* Add "about" to the system menu */
		HMENU hSysMenu = GetSystemMenu(hWnd, FALSE);
		InsertMenu(hSysMenu, 5, MF_BYPOSITION | MF_SEPARATOR, 0, NULL);
		InsertMenu(hSysMenu, 6, MF_BYPOSITION, ID_HELP_ABOUT, TEXT("About"));
		}

	return hWnd;
	}