Windows编程

开发平台：
Visual C++

DRAW.C：源码内容
							
/******************************************************************************
*       This is a part of the Microsoft Source Code Samples. 
*       Copyright (C) 1993-1997 Microsoft Corporation.
*       All rights reserved. 
*       This source code is only intended as a supplement to 
*       Microsoft Development Tools and/or WinHelp documentation.
*       See these sources for detailed information regarding the 
*       Microsoft samples programs.
******************************************************************************/
/*---------------------------------------------------------------------------*
| RANDOM OBJECTS MODULE
*---------------------------------------------------------------------------*/
#include <windows.h>
#include "gdidemo.h"
#include "draw.h"
/*---------------------------------------------------------------------------*
| CREATE DRAW WINDOW PROCEDURE
*---------------------------------------------------------------------------*/
HWND FAR CreateDrawWindow(HWND hWndClient, int nItem)
{
    HANDLE          hInstance;
    MDICREATESTRUCT mcs;
    static char buffer[256];
    hInstance = GETINSTANCE(hWndClient);
    LoadString (hInstance, DRAWTITLE, buffer, 256);
    /*
    ** Initialize the MDI create struct for creation of the
    ** test window.
    */
    mcs.szClass = DRAWCLASS;
    mcs.szTitle = buffer;
    mcs.hOwner  = hInstance;
    mcs.x       = CW_USEDEFAULT;
    mcs.y       = CW_USEDEFAULT;
    mcs.cx      = CW_USEDEFAULT;
    mcs.cy      = CW_USEDEFAULT;
    mcs.style   = 0l;
    mcs.lParam  = (LONG)nItem;
    return((HWND)SendMessage(hWndClient,WM_MDICREATE,0,(LONG)(LPMDICREATESTRUCT)&mcs));
}
/*---------------------------------------------------------------------------*
| DRAW WINDOW PROCEDURE
*---------------------------------------------------------------------------*/
LONG APIENTRY DrawProc(HWND hWnd, UINT wMsg, WPARAM wParam, LONG lParam)
{
    switch(wMsg)
    {
        case WM_CREATE:
            DrawCreateProc(hWnd);
            break;
        case WM_COMMAND:
            DrawCommandProc(hWnd,wParam,lParam);
            break;
        case WM_TIMER:
            DrawObject(hWnd);
            break;
        case WM_PAINT:
            DrawPaintProc(hWnd);
            break;
        case WM_DESTROY:
            DrawDestroyProc(hWnd);
            break;
        default:
            return(DefMDIChildProc(hWnd,wMsg,wParam,lParam));
    }
    return(0l);
}
/*---------------------------------------------------------------------------*
| DRAW CREATE PROCEDURE
*---------------------------------------------------------------------------*/
BOOL DrawCreateProc(HWND hWnd)
{
    PDRAWDATA pdd;
    if(AllocWindowInfo(hWnd,sizeof(DRAWDATA)))
    {
        if(pdd = (PDRAWDATA)LockWindowInfo(hWnd))
        {
            pdd->nObject = 0;
            UnlockWindowInfo(hWnd);
            SetTimer(hWnd,1,50,NULL);
            return(TRUE);
        }
        FreeWindowInfo(hWnd);
    }
    return(FALSE);
}
/*---------------------------------------------------------------------------*
| DRAW COMMAND PROCEDURE
*---------------------------------------------------------------------------*/
BOOL DrawCommandProc(HWND hWnd, WPARAM wParam, LONG lParam)
{
    hWnd   = hWnd;
    wParam = wParam;
    lParam = lParam;
    return(TRUE);
}
/*---------------------------------------------------------------------------*
| DRAW PAINT PROCEDURE
*---------------------------------------------------------------------------*/
VOID DrawPaintProc(HWND hWnd)
{
    HDC         hDC;
    PAINTSTRUCT ps;
    if(hDC = BeginPaint(hWnd,&ps))
        EndPaint(hWnd,&ps);
    return;
}
/*---------------------------------------------------------------------------*
| DRAW DESTROY PROCEDURE
*---------------------------------------------------------------------------*/
VOID DrawDestroyProc(HWND hWnd)
{
    KillTimer(hWnd,1);
    FreeWindowInfo(hWnd);
    return;
}
VOID DrawObject(HWND hWnd)
{
    PDRAWDATA pdd;
    RECT      rect;
    HDC       hDC;
    int       x1,y1,x2,y2,x3,y3,x4,y4,r,g,b,nObject;
    HBRUSH    hBrush;
    char      szDebug[80];
    if(pdd = (PDRAWDATA)LockWindowInfo(hWnd))
    {
        if(hDC = GetDC(hWnd))
        {
            GetClientRect(hWnd,&rect);
            // avoid divide by zero errors when the window is small.
            if ( rect.right== 0) rect.right++;
            if ( rect.bottom== 0) rect.bottom++;
            r = lRandom() % 255;
            g = lRandom() % 255;
            b = lRandom() % 255;
            if(hBrush = SelectObject(hDC,CreateSolidBrush(RGB(r,g,b))))
            {
                x1 = lRandom() % rect.right;
                y1 = lRandom() % rect.bottom;
                x2 = lRandom() % rect.right;
                y2 = lRandom() % rect.bottom;
                x3 = lRandom() % rect.right;
                y3 = lRandom() % rect.bottom;
                x4 = lRandom() % rect.right;
                y4 = lRandom() % rect.bottom;
                nObject = lRandom() % 5;
                switch(nObject)
                {
                    default:
                    case OBJ_RECTANGLE:
                        wsprintf(szDebug,"Rectangle(%d,%d,%d,%d)n",x1,y1,x2,y2);
                        DEBUGOUT(szDebug);
                        Rectangle(hDC,x1,y1,x2,y2);
                        break;
                    case OBJ_ELLIPSE:
                        wsprintf(szDebug,"Ellipse(%d,%d,%d,%d)n",x1,y1,x2,y2);
                        DEBUGOUT(szDebug);
                        Ellipse(hDC,x1,y1,x2,y2);
                        break;
                    case OBJ_ROUNDRECT:
                        wsprintf(szDebug,"RoundRect(%d,%d,%d,%d,%d,%d)n",x1,y1,x2,y2,x3,y3);
                        DEBUGOUT(szDebug);
                        RoundRect(hDC,x1,y1,x2,y2,x3,y3);
                        break;
                    case OBJ_CHORD:
                        wsprintf(szDebug,"Chord(%d,%d,%d,%d,%d,%d,%d,%d)n",x1,y1,x2,y2,x3,y3,x4,y4);
                        DEBUGOUT(szDebug);
                        Chord(hDC,x1,y1,x2,y2,x3,y3,x4,y4);
                        break;
                    case OBJ_PIE:
                        wsprintf(szDebug,"Pie(%d,%d,%d,%d,%d,%d,%d,%d)n",x1,y1,x2,y2,x3,y3,x4,y4);
                        DEBUGOUT(szDebug);
                        Pie(hDC,x1,y1,x2,y2,x3,y3,x4,y4);
                        break;
                }
                DeleteObject(SelectObject(hDC,hBrush));
            }
            ReleaseDC(hWnd,hDC);
        }
        UnlockWindowInfo(hWnd);
    }
    return;
}

						