getviewsettings

Syntax

#include <graphics.h>

void getviewsettings(struct viewporttype *viewport);

Description

getviewsettings fills the viewporttype structure pointed to by viewport with information about the current viewport.

The viewporttype structure used by getviewport is defined in graphics.h as follows:

struct viewporttype {

   int left, top, right, bottom;

   int clip;

};

Return Value

None.

See also

clearviewport

getx

gety

setviewport

Example

/* getviewsettings example */ 



#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>



char *clip[] = { "OFF", "ON" };



int main(void)

{

   /* request autodetection */

   int gdriver = DETECT, gmode, errorcode;

   struct viewporttype viewinfo;

   int midx, midy, ht;

   char topstr[80], botstr[80], clipstr[80];



   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");



   /* read result of initialization */

   errorcode = graphresult();



   if (errorcode != grOk) {  /* an error occurred */

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);               /* terminate with an error code */

   }



   midx = getmaxx() / 2;

   midy = getmaxy() / 2;



   /* get information about current viewport */

   getviewsettings(&viewinfo);



   /* convert text information into strings */

  sprintf(topstr, "(%d, %d) is the upper left viewport corner.",viewinfo.left, viewinfo.top);



  sprintf(botstr, "(%d, %d) is the lower right viewport corner.",viewinfo.right, viewinfo.bottom);

   sprintf(clipstr, "Clipping is turned %s.", clip[viewinfo.clip]);



   /* display the information */

   settextjustify(CENTER_TEXT, CENTER_TEXT);

   ht = textheight("W");

   outtextxy(midx, midy, topstr);

   outtextxy(midx, midy+2*ht, botstr);

   outtextxy(midx, midy+4*ht, clipstr);



   /* clean up */

   getch();

   closegraph();

   return 0;

}