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c:graphics.h:getviewsettings

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c:graphics.h:getviewsettings [2015/05/06 23:06] (current)
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 +===== getviewsettings =====
 +
 +
 +====Syntax of getviewsettings ==== 
 + <code c>
 +#include <graphics.h>
 +void getviewsettings(struct viewporttype *viewport);
 +  </code>
 +
 +
 +==== Description of getviewsettings ==== 
 +<code c>
 +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;
 +};
 +</code>
 +
 +
 +==== Example of getviewsettings ====
 +<code c>
 +/* 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;
 +}
 +</code>
 +
 +
 +==== See also ====
 +[[clearviewport]]
 +[[getx]]
 +[[gety]]
 +[[setviewport]]
 +
 +
 +===== output of getviewsettings example ===== 
 +
 +    no output of example at the moment
 +    do not hesitate and add it...  
 +
 +
  
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c/graphics.h/getviewsettings.txt · Last modified: 2015/05/06 23:06 (external edit)

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