User Tools

Site Tools


c:graphics.h:initwindow

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

c:graphics.h:initwindow [2015/05/06 23:06] (current)
Line 1: Line 1:
 +===== initwindow =====
 +
 +
 +====Syntax of initwindow ==== 
 + <code c>
 +#include "graphics.h"
 +int initwindow(int width, int height, const char* title="Windows BGI",
 +int left=0, int top=0, bool dbflag=false, closeflag=true);
 +  </code>
 +
 +
 +==== Description of initwindow ==== 
 +<code c>
 +The initwindow function is available in the winbgim implementation of BGI
 +graphics. You do not need to include conio.h; just include graphics.h.
 +The function initializes the graphics system by opening a graphics window
 +of the specified size. The first two parameters (width and height) are
 +required, but all other parameters have default values.
 +The title parameter is the title that will be printed at the top of the
 +window (with a default of "Windows BGI".) If this is set to the empty
 +string (no characters), then the window will be opened without a title
 +bar or border (typically used for a popup message that the user can then
 +close by clicking), and the user will not be able to move this window. If
 +you want a title bar with no visible title, then set the title to a
 +string containing one space.
 +The left and top parameters determine the screen coordinates of the left
 +and top sides of the window.
 +The dbflag parameter determines whether double-buffering for the window
 +is automatically turned on as described in the swapbuffers function (true
 +means that double-buffering will be turned on).
 +If the closeflag parameter is true, then the user can click on the
 +window's close button to shut down the entire program.
 +</code>
 +
 +
 +==== Example of initwindow ====
 +<code c>
 +/* initwindow example */
 +#include "graphics.h"
 +
 +int main(void)
 +{
 +   /* initialize graphics window at 400 x 300 */
 +   initwindow(400, 300);
 +
 +   /* draw a line */
 +   line(0, 0, getmaxx(), getmaxy());
 +
 +   /* clean up */
 +   getch();
 +   closegraph();
 +   return 0;
 +}
 +/* initwindow example with two windows */
 +#include "graphics.h"
 +
 +int main(void)
 +{
 +   int wid1, wid2;
 +
 +   /* initialize graphics windows */
 +   wid1 = initwindow(400, 300);
 +   wid2 = initwindow(300, 400, 200, 100);
 +
 +   /* draw lines */
 +   setcurrentwindow(wid1);
 +   line(0, 0, getmaxx(), getmaxy());
 +   setcurrentwindow(wid2);
 +   line(0, 0, getmaxx(), getmaxy());
 +
 +   /* clean up */
 +   getch();
 +   closegraph();
 +   return 0;
 +}
 +</code>
 +
 +
 +==== See also ====
 +[[closegraph]]
 +[[getcurrentwindow]]
 +[[getmaxheight]]
 +[[getmaxwidth]]
 +[[initgraph]]
 +[[setcurrentwindow]]
 +[[swapbuffers]]
 +
 +
 +===== output of initwindow example ===== 
 +
 +    no output of example at the moment
 +    do not hesitate and add it...  
 +
 +
  
advertising
c/graphics.h/initwindow.txt · Last modified: 2015/05/06 23:06 (external edit)

Impressum Datenschutz