main.cpp

游戏开发人工智能技术-AI.Techniques.for.Game.Programming

//-----------------------------------------------------------------------
//  
//  Name: GDI_Text example project
//  
//  Author: Mat Buckland 2002
//
//  Desc: Code demonstrating text output

//------------------------------------------------------------------------

#include <windows.h>
#include <time.h>

#include "defines.h"




//--------------------------------- Globals ------------------------------
//
//------------------------------------------------------------------------

char* g_szApplicationName = "The Groovy GDI - Text Output";
char*	g_szWindowClassName = "MyWindowClass";

//---------------------------- WindowProc ---------------------------------
//	
//	This is the callback function which handles all the windows messages
//-------------------------------------------------------------------------

LRESULT CALLBACK WindowProc (HWND   hwnd,
                             UINT   msg,
                             WPARAM wParam,
                             LPARAM lParam)
{
    //these hold the dimensions of the client window area
	  static int cxClient, cyClient;

    switch (msg)
    {
	
		//A WM_CREATE msg is sent when your application window is first
		//created
    case WM_CREATE:
      {
         //to get get the size of the client window first we need  to create
         //a RECT and then ask Windows to fill in our RECT structure with
         //the client window size. Then we assign to cxClient and cyClient 
         //accordingly
			   RECT rect;

			   GetClientRect(hwnd, &rect);

			   cxClient = rect.right;
			   cyClient = rect.bottom;

      }

      break;

    case WM_KEYUP:
      {
        switch(wParam)
        {

        case VK_ESCAPE:
          {
            PostQuitMessage(0);
          }
          
          break;
        }
      }
    
    case WM_PAINT:
      {
 				 PAINTSTRUCT ps;
          
         BeginPaint (hwnd, &ps);

          //Make the bottom part of window a pattern so you can see what
         //the transparency flag does
         HBRUSH PatternBrush = CreateHatchBrush(HS_BDIAGONAL, RGB(0,0,255));

         HBRUSH OldBrush = (HBRUSH)SelectObject(ps.hdc, PatternBrush);

         Rectangle(ps.hdc,0, cyClient/2, cxClient, cyClient);

         //replace the old brush
         SelectObject(ps.hdc, OldBrush);

         //first a demonstration of TextOut
         char* text = "1. I ain't got time to bleed.";
         
         TextOut(ps.hdc, 5, 5, text, strlen(text));

         //now DrawText. First we create a text box
         RECT TextBox;
         TextBox.top = 30;
         TextBox.left = 100;
         TextBox.bottom = 200;
         TextBox.right = cxClient-100;

         //assign some text
         text = "2. You take the blue pill and the story ends.You wake in your bed and believe whatever you want to believe.You take the red pill and you stay in Wonderland and I show you how deep the rabbit-hole goes.";

         //now print the text
         DrawText(ps.hdc, text, strlen(text), &TextBox, DT_WORDBREAK);

         //now to change the colors. First set text to red
          SetTextColor(ps.hdc, RGB(255, 0, 0));

         //background to black
         SetBkColor(ps.hdc, RGB(0, 0, 0));

         TextBox.top = 200;
         TextBox.left = 5;
         TextBox.bottom = 300;
         TextBox.right = cxClient-200;

         text = "3. The greatest trick the devil ever pulled was convincing the world he didn't exist.";
         DrawText(ps.hdc, text, strlen(text), &TextBox, DT_WORDBREAK);

         //now set background to transparent
         SetBkMode(ps.hdc, TRANSPARENT);

         TextBox.top = 300;
         TextBox.left = 100;
         TextBox.bottom = cyClient;
         TextBox.right = cxClient-50;

         text = "4. ...I抦 42 years old. In less than a year I抣l be dead";
         DrawText(ps.hdc, text, strlen(text), &TextBox, DT_WORDBREAK);
         
         EndPaint (hwnd, &ps);
      }

      break;

    //has the user resized the client area?
		case WM_SIZE:
		  {
        //if so we need to update our variables so that any drawing
        //we do using cxClient and cyClient is scaled accordingly
			  cxClient = LOWORD(lParam);
			  cyClient = HIWORD(lParam);
      }

      break;
          
		 case WM_DESTROY:
			 {

         // kill the application, this sends a WM_QUIT message  
				 PostQuitMessage (0);
			 }

       break;

     }//end switch

     //this is where all the messages not specifically handled by our 
		 //winproc are sent to be processed
		 return DefWindowProc (hwnd, msg, wParam, lParam);
}

//-------------------------------- WinMain -------------------------------
//
//	The entry point of the windows program
//------------------------------------------------------------------------
int WINAPI WinMain (HINSTANCE hInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR     szCmdLine, 
                    int       iCmdShow)
{
     //handle to our window
		 HWND						hWnd;
    
		 //our window class structure
		 WNDCLASSEX     winclass;
		 
     // first fill in the window class stucture
	   winclass.cbSize        = sizeof(WNDCLASSEX);
	   winclass.style         = CS_HREDRAW | CS_VREDRAW;
     winclass.lpfnWndProc   = WindowProc;
     winclass.cbClsExtra    = 0;
     winclass.cbWndExtra    = 0;
     winclass.hInstance     = hInstance;
     winclass.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
     winclass.hCursor       = LoadCursor(NULL, IDC_ARROW);
     winclass.hbrBackground = (HBRUSH)GetStockObject (WHITE_BRUSH);
     winclass.lpszMenuName  = NULL;
     winclass.lpszClassName = g_szWindowClassName;
	   winclass.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

		 //register the window class
		if (!RegisterClassEx(&winclass))
		{
			MessageBox(NULL, "Registration Failed!", "Error", 0);

			//exit the application
			return 0;
		}

		 //create the window and assign its ID to hwnd    
     hWnd = CreateWindowEx (NULL,                 // extended style
                            g_szWindowClassName,  // window class name
                            g_szApplicationName,  // window caption
                            WS_OVERLAPPEDWINDOW,  // window style
                            0,                    // initial x position
                            0,                    // initial y position
                            WINDOW_WIDTH,         // initial x size
                            WINDOW_HEIGHT,        // initial y size
                            NULL,                 // parent window handle
                            NULL,                 // window menu handle
                            hInstance,            // program instance handle
                            NULL);                // creation parameters

     //make sure the window creation has gone OK
     if(!hWnd)
     {
       MessageBox(NULL, "CreateWindowEx Failed!", "Error!", 0);
     }
         
     //make the window visible
		 ShowWindow (hWnd, iCmdShow);
     UpdateWindow (hWnd);

     //this will hold any windows messages
		 MSG msg;
     
 		 //entry point of our message handler
		 while (GetMessage (&msg, NULL, 0, 0))
     {
          TranslateMessage (&msg);
          DispatchMessage (&msg);
     }

     UnregisterClass( g_szWindowClassName, winclass.hInstance );
     return msg.wParam;
}