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发信人: Peter (小飞侠), 信区: Program
标 题: DOS下的面向对象程序设计(1)
发信站: BBS 荔园晨风站 (Thu Jan 21 20:59:22 1999), 转信
其中run()是控制消息的核心函数,DOSGRAPP()的作用是
初始化图形,鼠标和键盘。
这三个函数的实现如下:
void DOSGraApp::run()
int exit=0;
OnStart();
head=0;//消息队列头指针,全局变量
tail=0; //消息队列尾指针,全局变量
while(1)
{
if(head==tail)
{
disable();
Message[tail].Event=IsIdle;
tail++;
if(tail==QueLength)
tail=0;
enable()
}
else
{
switch(Message[head].Event)
{
case LButtonDown:
OnLButtonDown(Message[head].Information1,
Message[head].Information2,Message[head].Information3);
break;
.
.
.
.
case IsIdle:
OnIdle();
break;
case Quit:
OnQuit();
exit=1;
break;
default:
OnOther(Message[head].Event,Message[head].Information1,
Message[head].Information2,Message[head].Information3);
}
if(exit==1)
{
break;
}
disable();
head++;
if(head==QueLength)
head=0;
enable();
}
}
}
DOSGraApp::DOSGraApp()
{
int gdriver=DETECT,gmode,errorcode;
errorcode = registerbgidriver(EGAVGA_driver);
if(errorcode<0)
{
printf("Graphics error:%s\n",grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1);
}
registerbgifont(small_font);
initgraph(&gdriver,&gmode,"");
errorcode=graphresult();
if(errorcode!=grOk)
{
printf("Graphics error:%s\n",grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1);
}
settextstyle(SMALL_FONT,HORIZ_DIR,0);
MaxColors=getmaxcolor();
WindowWidth=getmaxx()+1;
WindowHeight=getmaxy()+1;
InitMouseAndKeyboard();
}
DOSGraApp::DOSGraApp(int Driver,int Mode)
{
int gdriver=DETECT,gmode,errorcode;
errorcode = registerbgidriver(EGAVGA_driver);
if(errorcode<0)
{
printf("Graphics error:%s\n",grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1);
}
initgraph(&gdriver,&gmode,"");
errorcode=graphresult();
if(errorcode!=grOk)
{
printf("Graphics error:%s\n",grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1);
}
MaxColors=getmaxcolor();
WindowWidth=getmaxx()+1;
WindowHeight=getmaxy()+1;
InitMouseAndKeyboard();
}
--
※ 来源:.BBS 荔园晨风站 bbs.szu.edu.cn.[FROM: 192.168.1.3]
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