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listbox.js
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2000-05-08
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5KB
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212 lines
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is JSIRC Library
*
* The Initial Developer of the Original Code is New Dimensions Consulting,
* Inc. Portions created by New Dimensions Consulting, Inc. are
* Copyright (C) 1999 New Dimenstions Consulting, Inc. All
* Rights Reserved.
*
* Contributor(s):
*
*
* Contributor(s):
* Robert Ginda, rginda@ndcico.com, original author
*/
function CListBox ()
{
this.listContainer = document.createElement ("box");
this.listContainer.setAttribute ("class", "list");
this.listContainer.setAttribute ("align", "vertical");
}
CListBox.prototype.clear =
function lbox_clear (e)
{
var obj = this.listContainer.firstChild;
while (obj)
{
this.listContainer.removeChild (obj);
obj = obj.nextSibling;
}
}
CListBox.prototype.clickHandler =
function lbox_chandler (e)
{
var lm = this.listManager;
e.target = this;
if (lm && typeof lm.onClick == "function")
lm.onClick ({realTarget: this, event: e});
}
CListBox.prototype.onClick =
function lbox_chandler (e)
{
/* Check for the button number first */
/* FIXME: are there constants for this stuff? */
if (e.event.which == 3)
{
return;
}
/*
* If the ctrlKey is _not_ set, unselect all currently
* selected items
*/
if (!e.event.ctrlKey)
{
this.enumerateElements(this._unselectCallback, e.realTarget);
}
/* Check to see whether the item is currently selected */
var isSelected = e.realTarget.getAttribute("selected");
/* toggle the value */
if ("true" == isSelected)
e.realTarget.setAttribute("selected", "false");
else
e.realTarget.setAttribute("selected", "true");
}
CListBox.prototype._unselectCallback =
function (element, ndx, realTarget)
{
if (element != realTarget)
element.setAttribute("selected", "false");
}
CListBox.prototype.add =
function lbox_add (stuff, tag)
{
/* NOTE: JG using a div here makes the item span the full
length and looks better when selected */
var option = document.createElement ("box");
option.setAttribute ("class", "list-option");
option.setAttribute ("align", "horizontal");
option.appendChild (stuff);
option.onclick = this.clickHandler;
option.listManager = this;
option.tag = tag;
this.listContainer.appendChild (option);
return true;
}
CListBox.prototype.prepend =
function lbox_prepend (stuff, oldstuff, tag)
{
if (!this.listContainer.firstChild)
return this.add (stuff, tag);
var nextOption = this._findOption (oldstuff);
if (!nextOption)
return false;
var option = document.createElement ("box");
option.setAttribute ("align", "horizontal");
option.appendChild (stuff);
option.onclick = this.clickHandler;
option.listManager = this;
option.tag = tag;
this.listContainer.insertBefore (option, nextOption);
}
CListBox.prototype.insert =
function lbox_Insert (stuff, tag)
{
this.prepend (stuff, this.listContainer.firstChild, tag);
}
CListBox.prototype.remove =
function lbox_remove (stuff)
{
var option = this._findOption (stuff);
if (option)
this.listContainer.removeChild (option);
return;
}
CListBox.prototype._findOption =
function lbox_remove (stuff)
{
var option = this.listContainer.firstChild;
while (option)
{
if (option.firstChild == stuff)
return option;
option = option.nextSibling;
}
return;
}
CListBox.prototype.enumerateElements =
/* NOTE: JG: added data param so arbitrary data can be passed. */
function lbox_enum (callback, data)
{
var i = 0;
var current = this.listContainer.firstChild;
while (current)
{
callback (current, i++, data);
current = current.nextSibling;
}
}
/**
* Using enumerateElements, this is used just to fill an array
* with selected nick names.
* @returns an array of selected nicknames
*/
CListBox.prototype.getSelectedItems =
function lbox_getselecteditems ()
{
var ary = [];
this.enumerateElements(this.selectedItemCallback, ary);
return ary;
}
/**
* used to build the array of values returned by getSelectedItems.
*/
CListBox.prototype.selectedItemCallback =
function (item, idx, data)
{
return item;
}