PRODUCT  :  Borland C++                           NUMBER  :  1032
  VERSION  :  3.x
       OS  :  DOS
     DATE  :  October 19, 1993                         PAGE  :  1/4

    TITLE  :  Example of Mouse Programming in Graphics Mode.






  //   This is a very simple drawing program which demonstrates
  //   using the mouse by polling the mouse driver; all done with
  //   interrupt 0x33 functions.

  #include <dos.h>
  #include <stdio.h>
  #include <conio.h>
  #include <graphics.h>

  #define MOUSE       0x33
  #define BUT1PRESSED  1
  #define BUT2PRESSED  2
  #define TRUE         1
  #define FALSE        0



  void ActivMouse()
  {
       /* activate mouse */
       _AX=32;
       geninterrupt(MOUSE);
  }



  int ResetMouse()
  {
       /* mouse reset */
       _AX=0;
       geninterrupt(MOUSE);
       return(_AX);
  }



  void ShowMouse()
  {
       /* turn on mouse cursor */
       _AX=1;
       geninterrupt(MOUSE);













  PRODUCT  :  Borland C++                           NUMBER  :  1032
  VERSION  :  3.x
       OS  :  DOS
     DATE  :  October 19, 1993                         PAGE  :  2/4

    TITLE  :  Example of Mouse Programming in Graphics Mode.




  }



  void HideMouse()
  {
       /* turn off mouse cursor */
       _AX=2;
       geninterrupt(MOUSE);
  }



  void ReadMouse(int *v,int *h,int *but)
  {
       int temp;
       _AX=3;
       geninterrupt(MOUSE);

       // which buttons pressed: 1=left, 2=right, 3=both
       temp=_BX;
       *but=temp;

       // horizontal coordinates
       *h =_CX;

       // vert coordinates
       *v=_DX;
  }



  int main( void )
  {
       int gdriver = EGA, gmode=EGAHI, errorcode;
       int mouseX, mouseY, mouseButton=0, currentColor=1;
       int oldMouseX=0, oldMouseY=0;
       char button1Down,button2Down=FALSE;
       if (!ResetMouse())
       {
            printf("No Mouse Driver!");
            return(1);
       }













  PRODUCT  :  Borland C++                           NUMBER  :  1032
  VERSION  :  3.x
       OS  :  DOS
     DATE  :  October 19, 1993                         PAGE  :  3/4

    TITLE  :  Example of Mouse Programming in Graphics Mode.




       printf(   "Instructions:\nHold down left button to draw,\n"
                 "Click right button to change color,\n"
                 "When done drawing, hit key.\n"
                 "Press any key to continue\n" );
       getch();
       initgraph(&gdriver,&gmode, "");
       if (graphresult()!=grOk)
       {
            printf( "Graphics Init Error -- EGAVGA.BGI not in "
                    "current directory?" );
            return(1);
       }

       setcolor(WHITE);
       outtextxy(1,1,"COLOR");
       ActivMouse();
       ShowMouse();
       while (!kbhit())
       {
            ReadMouse(&mouseY,&mouseX,&mouseButton);
            if (mouseButton&BUT1PRESSED)
            {
                 if (mouseX!=oldMouseX || mouseY!=oldMouseY)
                 {
                      // hide mouse cursor before drawing anything!
                      HideMouse();
                      if (button1Down)
                           line(mouseX,mouseY,oldMouseX,oldMouseY);
                      oldMouseX=mouseX; oldMouseY=mouseY;
                      ShowMouse();
                 }
                 button1Down=TRUE;
            }
            else
                 button1Down=FALSE;
            if (mouseButton&BUT2PRESSED)
            {
                 button2Down=TRUE;
            }
            else if (button2Down)
            {
                 // If button 2 was down and is now up, it was
                 // clicked!













  PRODUCT  :  Borland C++                           NUMBER  :  1032
  VERSION  :  3.x
       OS  :  DOS
     DATE  :  October 19, 1993                         PAGE  :  4/4

    TITLE  :  Example of Mouse Programming in Graphics Mode.




                 button2Down=FALSE;

                 // so change the color
                 ++currentColor;

                 if (currentColor==16)
                      currentColor=1;

                 setcolor(currentColor);
                 HideMouse();
                 outtextxy(1,1,"COLOR");
                 ShowMouse();
            }
       }
       closegraph();
       return( 0 );
  }



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  subject to the terms of the No-Nonsense License Statement that
  you received with the Borland product to which this information
  pertains.