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WINLIST.CC
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C/C++ Source or Header
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1991-10-27
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2KB
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114 lines
/**********************************************************************
*
* NAME: winlist.cpp
*
* DESCRIPTION: manage a front to back list of windows
*
* copyright (c) 1990 J. Alan Eldridge
*
* M O D I F I C A T I O N H I S T O R Y
*
* when who what
* -------------------------------------------------------------------
* 12/25/90 J. Alan Eldridge created
*
*********************************************************************/
#include "w.h"
#define MAXWINS 32
static int nwins = 0;
static Window *wins[ MAXWINS ];
// delete the window at position n
static void
delwin(int n)
{
for (; n < nwins - 1; n++)
wins[n] = wins[n+1];
nwins--;
}
// insert a new window at the front of the list
void
Window::newtop()
{
if (nwins > 0)
wins[0]->deactivate();
for (int n = nwins; n > 0; n--)
wins[n] = wins[n-1];
(wins[0] = this)->activate();
nwins++;
}
// is a window in the list?
static int
find(Window *w)
{
for (int n = nwins - 1; n >= 0; n--)
if (wins[n] == w) break;
return n;
}
// is this the top window?
int
Window::istop()
{
return nwins > 0 && wins[0] == this;
}
// make this the top window
int
Window::maketop(int show)
{
int n = find(this);
if (n) {
if (n > 0)
delwin(n);
if (nwins < MAXWINS)
newtop();
else
return ERR;
}
if (show)
refresh();
return OK;
}
// remove this from the list and activate
// new top (if there is one)
void
Window::unlink()
{
int n = find(this);
if (n >= 0) {
delwin(n);
if (!n && nwins > 0)
wins[0]->activate();
}
}
// find which window the mouse went down in
Window *
findwin(int &y, int &x)
{
for (int n = 0; n < nwins; n++)
if (wins[n]->inwindow(y, x))
return wins[n];
return 0;
}