Category : C Source Code
Archive   : WTWG12B.ZIP
Filename : WREOPEN.C

/*! wreopen ()
*
* makes the desired window the active window
* Does NOT check that no other window overlaps this one
* you can get screen gibberrish if you switch between
* overlapping windows
*
* The previous window becomes the second window on the chain.
*/


#include "wscreen.h"
#include "wsys.h"





void wreopen(WINDOW *Wnew)
{
WINDOW *p;

int oldpage, newpage;

if ( w0 == Wnew )
{
return;
}

/* find the window that 'points' to the desired new window
*/
for (p = w0; p->winchain != Wnew && p !=NULL; p= p->winchain)
{}


if (p==NULL)
{
werror('W', "WREOPEN-window not found");
}


/* now p points to the window immediately more recent than 'new' one
*/
p->winchain = Wnew->winchain; /* remove new from chain */
Wnew->winchain = w0;
w0 = Wnew;


newpage = w0-> winpage;
oldpage = w0->winchain->winpage;




if (oldpage != newpage)
{
wpage_ram = wvideo_ram + wpage_size*newpage;
}


#ifndef TEXTONLY
/* align BGI graphics driver
*/
walign (oldpage);
#endif /* ! TEXTONLY */

return; /* wreopen */
}