From f0d44091519e26b160ce12bc7366d02f196ac852 Mon Sep 17 00:00:00 2001
From: Frederic Culot <calcurse@culot.org>
Date: Fri, 18 Apr 2008 17:53:31 +0000
Subject: Generic functions to handle scrolling windows created
---
src/help.c | 76 ++++++++++++++++++++++++++------------------------------------
src/wins.c | 50 ++++++++++++++++++++++++++++++++++++++++-
src/wins.h | 46 +++++++++++++++++++++++--------------
3 files changed, 110 insertions(+), 62 deletions(-)
(limited to 'src')
diff --git a/src/help.c b/src/help.c
index f023d48..6a81750 100755
--- a/src/help.c
+++ b/src/help.c
@@ -1,4 +1,4 @@
-/* $calcurse: help.c,v 1.22 2008/04/12 21:14:03 culot Exp $ */
+/* $calcurse: help.c,v 1.23 2008/04/18 17:53:31 culot Exp $ */
/*
* Calcurse - text-based organizer
@@ -256,15 +256,12 @@ wanted_page (int ch)
void
help_screen (void)
{
- window_t hwin;
- window_t hpad;
+ scrollwin_t hwin;
const int PADOFFSET = 4;
const int TITLELINES = 3;
+ int need_resize;
int ch = '?';
- int text_lines;
- int first_line = 0, nl = 0;
int page, oldpage;
- int need_resize;
help_page_t hscr[HELPSCREENS];
hscr[HELP_MAIN].title =
@@ -560,71 +557,62 @@ help_screen (void)
"Send your feedback or comments to : calcurse@culot.org\n"
"Calcurse home page : http://culot.org/calcurse");
- need_resize = 0;
- page = oldpage = HELP_MAIN;
- help_wins_init (&hwin, &hpad, PADOFFSET);
+ hwin.win.x = 0;
+ hwin.win.y = 0;
+ hwin.win.h = (notify_bar ()) ? row - 3 : row - 2;
+ hwin.win.w = col;
+ hwin.pad.x = PADOFFSET;
+ hwin.pad.y = TITLELINES;
+ hwin.pad.h = BUFSIZ;
+ hwin.pad.w = col - 2 * PADOFFSET + 1;
+
+ snprintf (hwin.label, BUFSIZ, _("Calcurse %s | help"), VERSION);
+ wins_scrollwin_init (&hwin);
+ wins_show (hwin.win.p, hwin.label);
+ page = oldpage = HELP_MAIN;
+ need_resize = 0;
+
/* Display the help screen related to user input. */
while (ch != 'q')
{
- erase_window_part (hwin.p, 1, TITLELINES, col - 2, hwin.h - 2);
-
+ erase_window_part (hwin.win.p, 1, TITLELINES, col - 2,
+ hwin.win.h - 2);
switch (ch)
{
case KEY_RESIZE:
- help_wins_reset (&hwin, &hpad, PADOFFSET);
- first_line = 0;
- nl = write_help_pad (&hpad, &hscr[oldpage]);
+ help_wins_reset (&hwin.win, &hwin.pad, PADOFFSET);
+ hwin.first_visible_line = 0;
+ hwin.total_lines = write_help_pad (&hwin.pad, &hscr[oldpage]);
need_resize = 1;
break;
case CTRL ('n'):
- if (nl > (first_line + hwin.h - (PADOFFSET + 1)))
- first_line++;
+ if (hwin.total_lines
+ > (hwin.first_visible_line + hwin.win.h - hwin.pad.x))
+ hwin.first_visible_line++;
break;
case CTRL ('p'):
- if (first_line > 0)
- first_line--;
+ if (hwin.first_visible_line > 0)
+ hwin.first_visible_line--;
break;
default:
page = wanted_page (ch);
if (page != NOPAGE)
{
- first_line = 0;
- nl = write_help_pad (&hpad, &hscr[page]);
+ hwin.first_visible_line = 0;
+ hwin.total_lines = write_help_pad (&hwin.pad, &hscr[page]);
oldpage = page;
}
break;
}
-
- /* Draw the scrollbar if necessary. */
- text_lines = hwin.h - (PADOFFSET + 1);
- if (nl > text_lines)
- {
- float ratio = ((float) text_lines + 1) / ((float) nl);
- int sbar_length = (int) (ratio * text_lines);
- int highend = (int) (ratio * first_line);
- int sbar_top = highend + TITLELINES + 1;
-
- if ((sbar_top + sbar_length) > hwin.h - 1)
- sbar_length = hwin.h - 1 - sbar_top;
- draw_scrollbar (hwin.p, sbar_top, col - 2,
- sbar_length, TITLELINES + 1, hwin.h - 1, true);
- }
-
- wmove (win[STA].p, 0, 0);
- wnoutrefresh (hwin.p);
- pnoutrefresh (hpad.p, first_line, 0, PADOFFSET, PADOFFSET,
- hwin.h - 2, col - PADOFFSET);
- doupdate ();
+ wins_scrollwin_display (&hwin);
ch = wgetch (win[STA].p);
ch = tolower (ch);
}
-
- delwin (hpad.p);
- delwin (hwin.p);
+ wins_scrollwin_delete (&hwin);
if (need_resize)
wins_reset ();
}
diff --git a/src/wins.c b/src/wins.c
index 489c3da..189e149 100755
--- a/src/wins.c
+++ b/src/wins.c
@@ -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.
diff --git a/src/wins.h b/src/wins.h
index eef9119..67f9025 100755
--- a/src/wins.h
+++ b/src/wins.h
@@ -1,4 +1,4 @@
-/* $calcurse: wins.h,v 1.7 2008/04/12 21:14:03 culot Exp $ */
+/* $calcurse: wins.h,v 1.8 2008/04/18 17:53:31 culot Exp $ */
/*
* Calcurse - text-based organizer
@@ -40,7 +40,7 @@ typedef enum
}
window_e;
-/* Window properties */
+/* Generic window structure. */
typedef struct
{
WINDOW *p; /* pointer to window */
@@ -48,23 +48,35 @@ typedef struct
unsigned h; /* height */
int x; /* x position */
int y; /* y position */
-}
-window_t;
+} window_t;
+
+/* Generic scrolling window structure. */
+typedef struct
+{
+ window_t win;
+ window_t pad;
+ unsigned first_visible_line;
+ unsigned total_lines;
+ char label[BUFSIZ];
+} scrollwin_t;
extern window_t win[NBWINS];
-int wins_layout (void);
-void wins_set_layout (int);
-void wins_slctd_init (void);
-window_e wins_slctd (void);
-void wins_slctd_set (window_e);
-void wins_slctd_next (void);
-void wins_init (void);
-void wins_reinit (void);
-void wins_show (WINDOW *, char *);
-void wins_get_config (void);
-void wins_update (void);
-void wins_reset (void);
-void wins_launch_external (const char *, const char *);
+int wins_layout (void);
+void wins_set_layout (int);
+void wins_slctd_init (void);
+window_e wins_slctd (void);
+void wins_slctd_set (window_e);
+void wins_slctd_next (void);
+void wins_init (void);
+void wins_scrollwin_init (scrollwin_t *);
+void wins_scrollwin_delete (scrollwin_t *);
+void wins_scrollwin_display (scrollwin_t *);
+void wins_reinit (void);
+void wins_show (WINDOW *, char *);
+void wins_get_config (void);
+void wins_update (void);
+void wins_reset (void);
+void wins_launch_external (const char *, const char *);
#endif /* CALCURSE_WINS_H */
--
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