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/*
ui/listview.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include "ui/listview.h"
namespace ui
{
ListView::ListView(Widget *parent) : Widget(parent)
{
set_label("listview");
set_border(true);
set_background(true);
listview_scroll = 0.0f;
listview_selecteditem = 0;
}
ListView::~ListView()
{
}
void ListView::set_scroll(float scroll)
{
listview_scroll = scroll;
if (listview_scroll < 0)
listview_scroll = 0;
// calculate maximal scroll size
float top = 0;
for (Children::iterator it = children().begin(); it != children().end(); it++) {
top += (*it)->height();
}
if (listview_scroll > top) listview_scroll = top;
}
void ListView::inc_scroll(float scroll)
{
set_scroll(listview_scroll + scroll);
}
void ListView::dec_scroll(float scroll)
{
set_scroll(listview_scroll - scroll);
}
void ListView::resize()
{
float content_top = 0;
// reposition all children within the container
for (Children::iterator it = children().begin(); it != children().end(); it++) {
(*it)->set_width(width());
if (content_top - listview_scroll < 0) {
// child widget is invisible
(*it)->hide();
} else if ((content_top - listview_scroll) >= height()) {
// child widget is invisible
(*it)->hide();
} else {
(*it)->show();
(*it)->set_location(0, content_top - listview_scroll);
}
content_top += (*it)->height();
}
}
void ListView::deselect()
{
listview_selecteditem = 0;
}
void ListView::select(ListItem *item)
{
if (!item || is_child(item)) {
listview_selecteditem = item;
}
}
void ListView::clear()
{
listview_selecteditem = 0;
remove_children();
}
bool ListView::on_emit(Widget *sender, const Event event, void *data)
{
if ((sender->parent() == this) && (event == Widget::EventListItemClicked)) {
listview_selecteditem = static_cast<ListItem *>(sender);
emit(EventListViewChanged);
return true;
}
return false;
}
bool compare_listitems(const Widget *first, const Widget *second)
{
const ListItem *firstitem = dynamic_cast<const ListItem *>(first);
const ListItem *seconditem = dynamic_cast<const ListItem *>(second);
assert(firstitem && seconditem);
if (firstitem->sortkey() < seconditem->sortkey()) {
return true;
} else if (firstitem->sortkey() > seconditem->sortkey()) {
return false;
} else {
return (firstitem->sortkey().length() < seconditem->sortkey().length());
}
}
void ListView::sort()
{
children().sort(compare_listitems);
}
}
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