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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)
{
listview_scroll = 0.0f;
listview_selecteditem = 0;
set_label("listview");
set_border(true);
set_background(true);
listview_scrollbar = new ScrollBar(this);
listview_scrollbar->set_background(false);
listview_scrollbar->set_border(false);
}
ListView::~ListView()
{
}
void ListView::set_scroll(float scroll)
{
listview_scroll = scroll;
if (listview_scroll < 0)
listview_scroll = 0;
// calculate maximal scroll size
float nb_items = 0;
for (Children::iterator it = children().begin(); it != children().end(); it++) {
if ((*it) != static_cast<Widget *>(listview_scrollbar)) {
nb_items += 1.0f;
}
}
if (nb_items > 0.0f) {
nb_items -= 1.0f;
}
if (listview_scroll > nb_items) {
listview_scroll = nb_items;
}
}
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()
{
listview_scrollbar->set_size(font()->height(), height());
listview_scrollbar->set_location(width() - listview_scrollbar->width(), 0);
float total_height = 0;
float visible_height = 0;
float nb_items = 0;
// reposition all children within the container
for (Children::iterator it = children().begin(); it != children().end(); it++) {
if ((*it) != static_cast<Widget *>(listview_scrollbar)) {
(*it)->set_width(width() - listview_scrollbar->width());
if (nb_items - listview_scroll < 0) {
// child widget is invisible
(*it)->hide();
} else if ((visible_height + (*it)->height()) > height()) {
// child widget is invisible
(*it)->hide();
} else {
// child widget is visible
(*it)->show();
(*it)->set_location(0, visible_height);
visible_height += (*it)->height();
}
total_height += (*it)->height();
nb_items += 1.0f;
}
}
if (total_height > height()) {
if (nb_items > 0.0f)
nb_items -= 1.0f;
listview_scrollbar->set_range(0.0f, nb_items);
listview_scrollbar->set_value(listview_scroll);
listview_scrollbar->show();
} else {
for (Children::iterator it = children().begin(); it != children().end(); it++) {
if ((*it) != static_cast<Widget *>(listview_scrollbar)) {
(*it)->set_width(width());
}
}
listview_scrollbar->hide();
}
}
void ListView::deselect()
{
listview_selecteditem = 0;
}
void ListView::select(ListItem *item)
{
if (!item || is_child(item)) {
listview_selecteditem = item;
}
}
void ListView::clear()
{
listview_scroll = 0;
listview_selecteditem = 0;
remove_children();
listview_scrollbar = new ScrollBar(this);
listview_scrollbar->set_background(false);
listview_scrollbar->set_border(false);
listview_scrollbar->set_range(0.0f, 0.0f);
listview_scrollbar->set_value(listview_scroll);
}
ListItem *ListView::add_item(const std::string & text)
{
return new ui::ListItem(this, text.c_str());
}
bool ListView::on_emit(Widget *sender, const Event event, void *data)
{
if (sender == listview_scrollbar) {
if (event == Widget::EventScrollBarChanged) {
listview_scroll = listview_scrollbar->value();
resize();
}
return true;
} else if ((sender->parent() == this) && (event == Widget::EventListItemClicked)) {
listview_selecteditem = static_cast<ListItem *>(sender);
emit(EventListViewChanged);
return true;
}
return false;
}
bool ListView::on_mousewheel(const math::Vector2f & direction)
{
if (direction.y() > 0 )
{
dec_scroll(1.0f);
resize();
return true;
}
else if (direction.y() < 0)
{
inc_scroll(1.0f);
resize();
return true;
}
return false;
}
bool compare_listitems_ascending(const Widget *first, const Widget *second)
{
const ListItem *firstitem = dynamic_cast<const ListItem *>(first);
const ListItem *seconditem = dynamic_cast<const ListItem *>(second);
if (!firstitem)
return true;
else if (!seconditem)
return false;
if (firstitem->sortkey() < seconditem->sortkey()) {
return true;
} else if (firstitem->sortkey() > seconditem->sortkey()) {
return false;
} else {
return (firstitem->sortkey().length() < seconditem->sortkey().length());
}
}
bool compare_listitems_descending(const Widget *first, const Widget *second)
{
const ListItem *firstitem = dynamic_cast<const ListItem *>(first);
const ListItem *seconditem = dynamic_cast<const ListItem *>(second);
if (!firstitem)
return true;
else if (!seconditem)
return false;
if (firstitem->sortkey() < seconditem->sortkey()) {
return false;
} else if (firstitem->sortkey() > seconditem->sortkey()) {
return true;
} else {
return (firstitem->sortkey().length() > seconditem->sortkey().length());
}
}
void ListView::sort(bool ascending)
{
if (ascending) {
children().sort(compare_listitems_ascending);
} else {
children().sort(compare_listitems_descending);
}
}
}
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