Turbo C Graphics - rectangle function

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rectangle is the graphics function used to draw a rectangle by accepting left, top, right and bottom position. It draws the rectangle in the color set by setcolor function.

 

In this example I have drawn a bounding rectangle for the entire screen. Refer that how rectangle function is used along with getmaxx() and getmaxy() functions.

 

// draw a white color border with rectangle

rectangle(0,0,getmaxx(),getmaxy());

 

Apart from this, there is another inner rectangle by leaving the margin area.

 

       margin = 100; // 100 pixel margin

       left = margin;

       top = margin;

       bottom = getmaxy() - margin;

       right = getmaxx() - margin;

       // draw a bar with solid fill on blue color

       // use rectangle to have a white color border

       setfillstyle(SOLID_FILL, BLUE);

       bar(left, top, right, bottom);

       rectangle(left, top, right, bottom);;

 

 

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Source Code

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#include <graphics.h>

#include <stdio.h>

#include <math.h>

#include <conio.h>

#include <dos.h>

#include <stdlib.h>

 

void main()

{

 

       int i, grd, grm;

       int x, y, w;

       int left,top,right,bottom;

       int margin, width, height;

       int gresult;

       int cx, cy;

       char msg[512];

       char buffer[] = "softwareandfinance.com";

 

       // Detect the graphics driver and mode

       detectgraph(&grd,&grm);

       // initialize the graphics mode with initgraph

       initgraph(&grd, &grm, "");

 

       gresult = graphresult();

       if(gresult != grOk)

       {

              printf(grapherrormsg(gresult));

              getch();

              return;

       }

 

       // set the background color

       setbkcolor(RED);

       // set the foreground color

       setcolor(WHITE);

       // draw a white color border with rectangle

       rectangle(0,0,getmaxx(),getmaxy());

 

       // find the text width and text height

       width = textwidth(buffer);

       height = textheight(buffer);

       margin = 100; // 100 pixel margin

       left = margin;

       top = margin;

       // calculate the right and bottom with margin and getmaxx and getmaxy function

       bottom = getmaxy() - margin;

       right = getmaxx() - margin;

 

       // draw a bar with solid fill on blue color

       // use rectangle to have a white color border

       setfillstyle(SOLID_FILL, BLUE);

       bar(left, top, right, bottom);

       rectangle(left, top, right, bottom);

 

       // change the text foreground color to yellow

       setcolor(YELLOW);

       cx = (right + left - width) / 2;

       cy = (bottom + top - height) / 2;

 

       settextstyle(DEFAULT_FONT, HORIZ_DIR, 1);

       outtextxy(cx,cy,buffer);

 

       setcolor(WHITE);

       sprintf(msg, "background: %d, foreground: %d, maxcolors: %d", getbkcolor(), getcolor(), getmaxcolor());

       width = textwidth(msg);

       cx = (right + left - width) / 2;

       cy += textheight(msg) + 10;;

 

       // use moveto and outtext function instead of outtextxy

       moveto(cx, cy);

       outtext(msg);

 

       getch();

       closegraph();

}

 

 

Output

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