Category : C Source Code
Archive : WINDOW_C.ZIP
Filename : W_CLOSE.C
Output of file : W_CLOSE.C contained in archive : WINDOW_C.ZIP
w_refresh, w_dispose
*/
#include
#include
#include "windows.h"
/*
** w_close() -- close an open window, removing from screen & linked list
** passed: pointer to window structure
** calls: w_unlink(), w_refresh()
** uses: layers_w
** notes: makes sure that the window is actually open, and that
** it's not main_w (i.e., that layers_w > 0); removes the
** window's record from the linked list of open windows,
** then re-draws the screen's open windows from the bottom
** layer up
*/
void w_close(w)
Window *w;
{
if (w->open && layers_w) {
w_unlink(w);
w_refresh();
}
}
/*
** w_unlink() -- removes a window pointer from the linked list
** passed: pointer to window structure
** sets: layers_w, top_w
** notes: this routine is called as part of the process of
** closing an open window; does not destroy storage for
** window's information; if the window was on top the
** window which was underneath becomes the top window;
** otherwise the window's previous neighbors on each side
** are spliced together to seal up the gap
*/
void w_unlink(w)
Window *w;
{
if (w == top_w) {
top_w = w->prev;
top_w->next = NULL;
}
else {
w->prev->next = w->next;
w->next->prev = w->prev;
}
layers_w--;
w->open = 0;
}
/*
** w_refresh() -- redraws the screen, working from the bottom window up
** calls: w_draw()
** uses: main_w
** notes: this routine is called to rebuild a screen when a
** window has been closed and removed from the display
*/
void w_refresh()
{
Window *w;
for (w = main_w; w != NULL; w = w->next)
w_draw(w);
}
/*
** w_dispose() -- frees up space used by window's information
** passed: pointer to window structure
** calls: w_close(), free()
** uses: main_w
** notes: makes sure the window is closed first; takes no
** action if called with main_w
*/
void w_dispose(w)
Window *w;
{
if (w == main_w)
return;
if (w->open)
w_close(w);
free((char *) w->data);
free((char *) w);
}
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