Generic functions to handle scrolling windows created
This commit is contained in:
Frederic Culot
parent
efd782699b
commit
f0d4409151
@ -1,3 +1,6 @@
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18 Apr 2008:
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Generic functions to handle scrolling windows created
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12 Apr 2008:
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Yet another style for source code. GNU style now used (I am fed up
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with tabs...)
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76
src/help.c
76
src/help.c
@ -1,4 +1,4 @@
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/* $calcurse: help.c,v 1.22 2008/04/12 21:14:03 culot Exp $ */
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/* $calcurse: help.c,v 1.23 2008/04/18 17:53:31 culot Exp $ */
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/*
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* Calcurse - text-based organizer
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@ -256,15 +256,12 @@ wanted_page (int ch)
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void
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help_screen (void)
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{
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window_t hwin;
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window_t hpad;
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scrollwin_t hwin;
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const int PADOFFSET = 4;
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const int TITLELINES = 3;
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int ch = '?';
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int text_lines;
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int first_line = 0, nl = 0;
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int page, oldpage;
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int need_resize;
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int ch = '?';
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int page, oldpage;
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help_page_t hscr[HELPSCREENS];
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hscr[HELP_MAIN].title =
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@ -560,71 +557,62 @@ help_screen (void)
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"Send your feedback or comments to : calcurse@culot.org\n"
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"Calcurse home page : http://culot.org/calcurse");
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need_resize = 0;
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hwin.win.x = 0;
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hwin.win.y = 0;
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hwin.win.h = (notify_bar ()) ? row - 3 : row - 2;
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hwin.win.w = col;
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hwin.pad.x = PADOFFSET;
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hwin.pad.y = TITLELINES;
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hwin.pad.h = BUFSIZ;
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hwin.pad.w = col - 2 * PADOFFSET + 1;
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snprintf (hwin.label, BUFSIZ, _("Calcurse %s | help"), VERSION);
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wins_scrollwin_init (&hwin);
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wins_show (hwin.win.p, hwin.label);
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page = oldpage = HELP_MAIN;
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help_wins_init (&hwin, &hpad, PADOFFSET);
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need_resize = 0;
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/* Display the help screen related to user input. */
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while (ch != 'q')
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{
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erase_window_part (hwin.p, 1, TITLELINES, col - 2, hwin.h - 2);
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erase_window_part (hwin.win.p, 1, TITLELINES, col - 2,
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hwin.win.h - 2);
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switch (ch)
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{
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case KEY_RESIZE:
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help_wins_reset (&hwin, &hpad, PADOFFSET);
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first_line = 0;
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nl = write_help_pad (&hpad, &hscr[oldpage]);
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help_wins_reset (&hwin.win, &hwin.pad, PADOFFSET);
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hwin.first_visible_line = 0;
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hwin.total_lines = write_help_pad (&hwin.pad, &hscr[oldpage]);
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need_resize = 1;
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break;
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case CTRL ('n'):
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if (nl > (first_line + hwin.h - (PADOFFSET + 1)))
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first_line++;
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if (hwin.total_lines
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> (hwin.first_visible_line + hwin.win.h - hwin.pad.x))
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hwin.first_visible_line++;
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break;
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case CTRL ('p'):
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if (first_line > 0)
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first_line--;
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if (hwin.first_visible_line > 0)
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hwin.first_visible_line--;
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break;
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default:
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page = wanted_page (ch);
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if (page != NOPAGE)
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{
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first_line = 0;
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nl = write_help_pad (&hpad, &hscr[page]);
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hwin.first_visible_line = 0;
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hwin.total_lines = write_help_pad (&hwin.pad, &hscr[page]);
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oldpage = page;
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}
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break;
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}
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/* Draw the scrollbar if necessary. */
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text_lines = hwin.h - (PADOFFSET + 1);
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if (nl > text_lines)
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{
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float ratio = ((float) text_lines + 1) / ((float) nl);
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int sbar_length = (int) (ratio * text_lines);
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int highend = (int) (ratio * first_line);
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int sbar_top = highend + TITLELINES + 1;
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if ((sbar_top + sbar_length) > hwin.h - 1)
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sbar_length = hwin.h - 1 - sbar_top;
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draw_scrollbar (hwin.p, sbar_top, col - 2,
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sbar_length, TITLELINES + 1, hwin.h - 1, true);
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}
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wmove (win[STA].p, 0, 0);
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wnoutrefresh (hwin.p);
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pnoutrefresh (hpad.p, first_line, 0, PADOFFSET, PADOFFSET,
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hwin.h - 2, col - PADOFFSET);
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doupdate ();
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wins_scrollwin_display (&hwin);
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ch = wgetch (win[STA].p);
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ch = tolower (ch);
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}
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delwin (hpad.p);
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delwin (hwin.p);
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wins_scrollwin_delete (&hwin);
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if (need_resize)
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wins_reset ();
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}
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50
src/wins.c
50
src/wins.c
@ -1,4 +1,4 @@
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/* $calcurse: wins.c,v 1.13 2008/04/12 21:14:03 culot Exp $ */
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/* $calcurse: wins.c,v 1.14 2008/04/18 17:53:31 culot Exp $ */
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/*
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* Calcurse - text-based organizer
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@ -118,6 +118,54 @@ wins_init (void)
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keypad (win[STA].p, TRUE);
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}
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/*
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* Create a new window and its associated pad, which is used to make the
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* scrolling faster.
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*/
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void
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wins_scrollwin_init (scrollwin_t *sw)
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{
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ASSERT (sw != NULL);
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sw->win.p = newwin (sw->win.h, sw->win.w, sw->win.y, sw->win.x);
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sw->pad.p = newpad (sw->pad.h, sw->pad.w);
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sw->first_visible_line = 0;
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sw->total_lines = 0;
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}
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/* Free an already created scrollwin. */
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void
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wins_scrollwin_delete (scrollwin_t *sw)
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{
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ASSERT (sw != NULL);
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delwin(sw->win.p);
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delwin(sw->pad.p);
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}
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/* Display a scrolling window. */
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void
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wins_scrollwin_display (scrollwin_t *sw)
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{
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const int visible_lines = sw->win.h - sw->pad.x;
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if (sw->total_lines > visible_lines)
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{
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float ratio = ((float) visible_lines) / ((float) sw->total_lines);
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int sbar_length = (int) (ratio * visible_lines);
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int highend = (int) (ratio * sw->first_visible_line);
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int sbar_top = highend + sw->pad.y + 1;
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if ((sbar_top + sbar_length) > sw->win.h - 1)
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sbar_length = sw->win.h - sbar_top;
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draw_scrollbar (sw->win.p, sbar_top, sw->win.w + sw->win.x - 2,
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sbar_length, sw->pad.y + 1, sw->win.h - 1, true);
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}
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wmove (win[STA].p, 0, 0);
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wnoutrefresh (sw->win.p);
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pnoutrefresh (sw->pad.p, sw->first_visible_line, 0, sw->pad.y, sw->pad.x,
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sw->win.h - sw->pad.y + 1, sw->win.w - sw->win.x);
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doupdate ();
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}
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/*
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* Delete the existing windows and recreate them with their new
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* size and placement.
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20
src/wins.h
20
src/wins.h
@ -1,4 +1,4 @@
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/* $calcurse: wins.h,v 1.7 2008/04/12 21:14:03 culot Exp $ */
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/* $calcurse: wins.h,v 1.8 2008/04/18 17:53:31 culot Exp $ */
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/*
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* Calcurse - text-based organizer
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@ -40,7 +40,7 @@ typedef enum
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}
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window_e;
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/* Window properties */
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/* Generic window structure. */
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typedef struct
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{
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WINDOW *p; /* pointer to window */
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@ -48,8 +48,17 @@ typedef struct
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unsigned h; /* height */
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int x; /* x position */
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int y; /* y position */
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}
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window_t;
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} window_t;
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/* Generic scrolling window structure. */
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typedef struct
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{
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window_t win;
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window_t pad;
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unsigned first_visible_line;
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unsigned total_lines;
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char label[BUFSIZ];
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} scrollwin_t;
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extern window_t win[NBWINS];
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@ -60,6 +69,9 @@ window_e wins_slctd (void);
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void wins_slctd_set (window_e);
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void wins_slctd_next (void);
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void wins_init (void);
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void wins_scrollwin_init (scrollwin_t *);
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void wins_scrollwin_delete (scrollwin_t *);
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void wins_scrollwin_display (scrollwin_t *);
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void wins_reinit (void);
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void wins_show (WINDOW *, char *);
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void wins_get_config (void);
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