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/*
* Calcurse - text-based organizer
*
* Copyright (c) 2004-2014 calcurse Development Team <misc@calcurse.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Send your feedback or comments to : misc@calcurse.org
* Calcurse home page : http://calcurse.org
*
*/
#include "calcurse.h"
void listbox_init(struct listbox *lb, int y, int x, int h, int w,
const char *label, listbox_fn_item_type_t fn_type,
listbox_fn_item_height_t fn_height,
listbox_fn_draw_item_t fn_draw)
{
EXIT_IF(lb == NULL, "null pointer");
wins_scrollwin_init(&(lb->sw), y, x, h, w, label);
lb->item_count = lb->item_sel = 0;
lb->fn_type = fn_type;
lb->type = NULL;
lb->fn_height = fn_height;
lb->ch = NULL;
lb->fn_draw = fn_draw;
lb->cb_data = NULL;
}
void listbox_delete(struct listbox *lb)
{
EXIT_IF(lb == NULL, "null pointer");
wins_scrollwin_delete(&(lb->sw));
free(lb->type);
free(lb->ch);
}
void listbox_resize(struct listbox *lb, int y, int x, int h, int w)
{
EXIT_IF(lb == NULL, "null pointer");
wins_scrollwin_resize(&(lb->sw), y, x, h, w);
if (lb->item_sel < 0)
return;
unsigned last_line = lb->ch[lb->item_count] - 1;
if (wins_scrollwin_is_visible(&(lb->sw), last_line))
wins_scrollwin_set_lower(&(lb->sw), last_line);
wins_scrollwin_ensure_visible(&(lb->sw), lb->ch[lb->item_sel]);
wins_scrollwin_ensure_visible(&(lb->sw), lb->ch[lb->item_sel + 1] - 1);
}
void listbox_set_cb_data(struct listbox *lb, void *cb_data)
{
lb->cb_data = cb_data;
}
static void listbox_fix_sel(struct listbox *, int);
void listbox_load_items(struct listbox *lb, int item_count)
{
int i, ch;
lb->item_count = item_count;
if (item_count == 0) {
lb->item_sel = -1;
return;
}
free(lb->type);
free(lb->ch);
lb->type = xmalloc(item_count * sizeof(unsigned));
lb->ch = xmalloc((item_count + 1) * sizeof(unsigned));
for (i = 0, ch = 0; i < item_count; i++) {
lb->type[i] = lb->fn_type(i, lb->cb_data);
lb->ch[i] = ch;
ch += lb->fn_height(i, lb->cb_data);
}
lb->ch[item_count] = ch;
wins_scrollwin_set_linecount(&(lb->sw), ch);
if (item_count > 0 && lb->item_sel < 0) {
lb->item_sel = 0;
listbox_fix_sel(lb, 1);
} else if (lb->item_sel >= item_count) {
lb->item_sel = item_count - 1;
listbox_fix_sel(lb, -1);
}
}
void listbox_draw_deco(struct listbox *lb, int hilt)
{
wins_scrollwin_draw_deco(&(lb->sw), hilt);
}
void listbox_display(struct listbox *lb)
{
int i;
werase(lb->sw.inner);
for (i = 0; i < lb->item_count; i++) {
int is_sel = (i == lb->item_sel);
lb->fn_draw(i, lb->sw.inner, lb->ch[i], is_sel, lb->cb_data);
}
wins_scrollwin_display(&(lb->sw));
}
int listbox_get_sel(struct listbox *lb)
{
return lb->item_sel;
}
static void listbox_fix_sel(struct listbox *lb, int direction)
{
int did_flip = 0;
if (lb->item_count == 0 || direction == 0)
return;
direction = direction > 0 ? 1 : -1;
while (lb->type[lb->item_sel] != LISTBOX_ROW_TEXT) {
if ((direction == -1 && lb->item_sel == 0) ||
(direction == 1 && lb->item_sel == lb->item_count - 1)) {
if (did_flip) {
lb->item_sel = -1;
return;
}
direction = -direction;
did_flip = 1;
} else {
lb->item_sel += direction;
}
}
}
static void listbox_fix_visible_region(struct listbox *lb)
{
int i;
wins_scrollwin_ensure_visible(&(lb->sw), lb->ch[lb->item_sel]);
wins_scrollwin_ensure_visible(&(lb->sw), lb->ch[lb->item_sel + 1] - 1);
i = lb->item_sel - 1;
while (i >= 0 && lb->type[i] != LISTBOX_ROW_TEXT) {
wins_scrollwin_ensure_visible(&(lb->sw), lb->ch[i]);
wins_scrollwin_ensure_visible(&(lb->sw), lb->ch[i + 1] - 1);
i++;
}
}
void listbox_set_sel(struct listbox *lb, unsigned pos)
{
lb->item_sel = pos;
listbox_fix_sel(lb, 1);
if (lb->item_sel < 0)
return;
listbox_fix_visible_region(lb);
}
void listbox_sel_move(struct listbox *lb, int delta)
{
if (lb->item_count == 0)
return;
lb->item_sel += delta;
if (lb->item_sel < 0)
lb->item_sel = 0;
else if (lb->item_sel >= lb->item_count)
lb->item_sel = lb->item_count - 1;
listbox_fix_sel(lb, delta);
if (lb->item_sel < 0)
return;
listbox_fix_visible_region(lb);
}
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