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Generic functions to handle scrolling windows created

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This commit is contained in:
Frederic Culot
2008-04-18 17:53:31 +00:00
parent efd782699b
commit f0d4409151
4 changed files with 114 additions and 63 deletions
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50
src/wins.c
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@@ -1,4 +1,4 @@
/* $calcurse: wins.c,v 1.13 2008/04/12 21:14:03 culot Exp $ */
/* $calcurse: wins.c,v 1.14 2008/04/18 17:53:31 culot Exp $ */
/*
* Calcurse - text-based organizer
@@ -118,6 +118,54 @@ wins_init (void)
keypad (win[STA].p, TRUE);
}
/*
* Create a new window and its associated pad, which is used to make the
* scrolling faster.
*/
void
wins_scrollwin_init (scrollwin_t *sw)
{
ASSERT (sw != NULL);
sw->win.p = newwin (sw->win.h, sw->win.w, sw->win.y, sw->win.x);
sw->pad.p = newpad (sw->pad.h, sw->pad.w);
sw->first_visible_line = 0;
sw->total_lines = 0;
}
/* Free an already created scrollwin. */
void
wins_scrollwin_delete (scrollwin_t *sw)
{
ASSERT (sw != NULL);
delwin(sw->win.p);
delwin(sw->pad.p);
}
/* Display a scrolling window. */
void
wins_scrollwin_display (scrollwin_t *sw)
{
const int visible_lines = sw->win.h - sw->pad.x;
if (sw->total_lines > visible_lines)
{
float ratio = ((float) visible_lines) / ((float) sw->total_lines);
int sbar_length = (int) (ratio * visible_lines);
int highend = (int) (ratio * sw->first_visible_line);
int sbar_top = highend + sw->pad.y + 1;
if ((sbar_top + sbar_length) > sw->win.h - 1)
sbar_length = sw->win.h - sbar_top;
draw_scrollbar (sw->win.p, sbar_top, sw->win.w + sw->win.x - 2,
sbar_length, sw->pad.y + 1, sw->win.h - 1, true);
}
wmove (win[STA].p, 0, 0);
wnoutrefresh (sw->win.p);
pnoutrefresh (sw->pad.p, sw->first_visible_line, 0, sw->pad.y, sw->pad.x,
sw->win.h - sw->pad.y + 1, sw->win.w - sw->win.x);
doupdate ();
}
/*
* Delete the existing windows and recreate them with their new
* size and placement.