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Diffstat (limited to 'src/Fl_Check_Browser.cxx')
| -rw-r--r-- | src/Fl_Check_Browser.cxx | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/Fl_Check_Browser.cxx b/src/Fl_Check_Browser.cxx new file mode 100644 index 000000000..ffc5ec55f --- /dev/null +++ b/src/Fl_Check_Browser.cxx @@ -0,0 +1,263 @@ +// +// "$Id: Fl_Check_Browser.cxx,v 1.1.2.1 2001/08/18 23:42:36 easysw Exp $" +// +// Fl_Check_Browser header file for the Fast Light Tool Kit (FLTK). +// +// Copyright 1998-2001 by Bill Spitzak and others. +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Library General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Library General Public License for more details. +// +// You should have received a copy of the GNU Library General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 +// USA. +// +// Please report all bugs and problems to "fltk-bugs@fltk.org". +// + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <FL/fl_draw.H> +#include <FL/Fl_Check_Browser.H> + +/* This uses a cache for faster access when you're scanning the list +either forwards or backwards. */ + +Fl_Check_Browser::cb_item *Fl_Check_Browser::find_item(int n) const { + int i = n; + cb_item *p = first; + + if (n <= 0 || n > nitems_ || p == 0) { + return 0; + } + + if (n == cached_item) { + p = cache; + n = 1; + } else if (n == cached_item + 1) { + p = cache->next; + n = 1; + } else if (n == cached_item - 1) { + p = cache->prev; + n = 1; + } + + while (--n) { + p = p->next; + } + + /* Cast to not const and cache it. */ + + ((Fl_Check_Browser *)this)->cache = p; + ((Fl_Check_Browser *)this)->cached_item = i; + + return p; +} + +int Fl_Check_Browser::lineno(cb_item *p0) const { + cb_item *p = first; + + if (p == 0) { + return 0; + } + + int i = 1; + while (p) { + if (p == p0) { + return i; + } + i++; + p = p->next; + } + + return 0; +} + +Fl_Check_Browser::Fl_Check_Browser(int x, int y, int w, int h, const char *l) + : Fl_Browser_(x, y, w, h, l) { + type(FL_SELECT_BROWSER); + when(FL_WHEN_NEVER); + first = last = 0; + nitems_ = nchecked_ = 0; + cached_item = -1; +} + +void *Fl_Check_Browser::item_first() const { + return first; +} + +void *Fl_Check_Browser::item_next(void *l) const { + return ((cb_item *)l)->next; +} + +void *Fl_Check_Browser::item_prev(void *l) const { + return ((cb_item *)l)->prev; +} + +int Fl_Check_Browser::item_height(void *) const { + return textsize() + 2; +} + +#define CHECK_SIZE 8 + +int Fl_Check_Browser::item_width(void *v) const { + fl_font(textfont(), textsize()); + return int(fl_width(((cb_item *)v)->text)) + CHECK_SIZE + 8; +} + +void Fl_Check_Browser::item_draw(void *v, int x, int y, int, int) const { + cb_item *i = (cb_item *)v; + char *s = i->text; + int size = textsize(); + Fl_Color col = textcolor(); + int cy = y + (size + 1 - CHECK_SIZE) / 2; + x += 2; + + fl_color(FL_BLACK); + fl_loop(x, cy, x, cy + CHECK_SIZE, + x + CHECK_SIZE, cy + CHECK_SIZE, x + CHECK_SIZE, cy); + if (i->checked) { + fl_line(x, cy, x + CHECK_SIZE, cy + CHECK_SIZE); + fl_line(x, cy + CHECK_SIZE, x + CHECK_SIZE, cy); + } + fl_font(textfont(), size); + if (i->selected) { + col = contrast(col, selection_color()); + } + fl_color(col); + fl_draw(s, x + CHECK_SIZE + 8, y + size - 1); +} + +void Fl_Check_Browser::item_select(void *v, int state) { + cb_item *i = (cb_item *)v; + + if (state) { + if (i->checked) { + i->checked = 0; + nchecked_--; + } else { + i->checked = 1; + nchecked_++; + } + } +} + +int Fl_Check_Browser::item_selected(void *v) const { + cb_item *i = (cb_item *)v; + return i->selected; +} + +int Fl_Check_Browser::add(char *s) { + return (add(s, 0)); +} + +int Fl_Check_Browser::add(char *s, int b) { + cb_item *p = (cb_item *)malloc(sizeof(cb_item)); + p->next = 0; + p->prev = 0; + p->checked = b; + p->selected = 0; + p->text = strdup(s); + + if (b) { + nchecked_++; + } + + if (last == 0) { + first = last = p; + } else { + last->next = p; + p->prev = last; + last = p; + } + nitems_++; + + return (nitems_); +} + +void Fl_Check_Browser::clear() { + cb_item *p = first; + cb_item *next; + + if (p == 0) { + return; + } + + new_list(); + do { + next = p->next; + free(p->text); + free(p); + p = next; + } while (p); + + first = last = 0; + nitems_ = nchecked_ = 0; + cached_item = -1; +} + +int Fl_Check_Browser::checked(int i) const { + cb_item *p = find_item(i); + + if (p) return p->checked; + return 0; +} + +void Fl_Check_Browser::checked(int i, int b) { + cb_item *p = find_item(i); + + if (p && (p->checked ^ b)) { + p->checked = b; + if (b) { + nchecked_++; + } else { + nchecked_--; + } + redraw(); + } +} + +int Fl_Check_Browser::value() const { + return lineno((cb_item *)selection()); +} + +char *Fl_Check_Browser::text(int i) const { + cb_item *p = find_item(i); + + if (p) return p->text; + return 0; +} + +void Fl_Check_Browser::check_all() { + cb_item *p; + + nchecked_ = nitems_; + for (p = first; p; p = p->next) { + p->checked = 1; + } + redraw(); +} + +void Fl_Check_Browser::check_none() { + cb_item *p; + + nchecked_ = 0; + for (p = first; p; p = p->next) { + p->checked = 0; + } + redraw(); +} + + +// +// End of "$Id: Fl_Check_Browser.cxx,v 1.1.2.1 2001/08/18 23:42:36 easysw Exp $". +// |