shapes.cpp

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// Shapes.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include "shape.h"

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szTitle[MAX_LOADSTRING];								// The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];								// The title bar text

// Foward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK	About(HWND, UINT, WPARAM, LPARAM);
void DoDrawBase (HWND hWnd, HDC hdc);
void DoDrawCircle (HWND hWnd, HDC hdc);
void DoDrawSquare (HWND hWnd, HDC hdc, int nSquash = 0);
// void DoDrawRhombus (HWND hWnd, HDC hdc);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	MSG msg;
	HACCEL hAccelTable;

	// Initialize global strings
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_SHAPES, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

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

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_SHAPES);

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

	return msg.wParam;
}

//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage is only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX); 

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= (WNDPROC)WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, (LPCTSTR)IDI_SHAPES);
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= (LPCSTR)IDC_SHAPES;
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

	return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HANDLE, 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)
{
   HWND hWnd;

   hInst = hInstance; // Store instance handle in our global variable

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

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

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  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 int nMode = IDM_SHAPES_CLEAR;
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;

	switch (message) 
	{
		case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 
			// Parse the menu selections:
			switch (wmId)
			{
			RECT rc;
				case IDM_SHAPES_CLEAR:
				case IDM_SHAPES_BASE:
				case IDM_SHAPES_CIRCLE:
				case IDM_SHAPES_SQUARE:
				case IDM_SHAPES_RHOMBUS:
                   nMode = wmId;
                   GetClientRect (hWnd, &rc);
                   InvalidateRect (hWnd, &rc, TRUE);
                   break;
				case IDM_ABOUT:
				   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				   break;
				case IDM_EXIT:
				   DestroyWindow(hWnd);
				   break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break;
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			switch (nMode)
			{
				case IDM_SHAPES_CLEAR:
					break;
				case IDM_SHAPES_BASE:
					DoDrawBase (hWnd, hdc);
					break;
				case IDM_SHAPES_CIRCLE:
					DoDrawCircle (hWnd, hdc);
					break;
				case IDM_SHAPES_SQUARE:
					DoDrawSquare (hWnd, hdc);
					break;
				case IDM_SHAPES_RHOMBUS:
					DoDrawSquare (hWnd, hdc, -300);
					break;
			}
			EndPaint(hWnd, &ps);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

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

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

void DoDrawBase (HWND hWnd, HDC hdc)
{
CShape shape (hWnd, hdc);

	shape.Show ();
}

void DoDrawCircle (HWND hWnd, HDC hdc)
{
RECT rc;

	GetClientRect (hWnd, &rc);
	POINT ptPoint;
//
// Center is at the center of the window
	ptPoint.x = rc.right / 2;
	ptPoint.y = rc.bottom / 2;
	CCircle circle (hWnd, hdc, ptPoint, rc.bottom / 3);
	circle.Show ();
}

void DoDrawSquare (HWND hWnd, HDC hdc, int nSquash)
{
RECT rc;

	GetClientRect (hWnd, &rc);
	int nSide = (rc.bottom - rc.top) / 3;
	POINT ptStart = {rc.right / 2 - nSide, rc.bottom / 2 - nSide};
	POINT ptEnd = {rc.right / 2 + nSide, rc.bottom / 2 - nSide + 40};
	CSquare square (hWnd, hdc, ptStart, ptEnd, nSquash);
	square.Show ();
}