//ICMap, Copyright 2006, clifford L. Collins, Collins Software, all rights reserved, http://collinssoftware.com, not for distribution or resale, use License is required: ichistory
var history=new ic$History();
function historyBack()
{
history.back();
}
function historyForeward()
{
history.foreward();
}
function ic$HistoryWindow(x,y,level)
{
this.x=parseFloat(x);
this.y=parseFloat(y);
this.level=parseInt(level);
this.next=null;
this.prev=null;
}
function ic$History()
{
this.top=null;
this.bot=null;
this.cur=null;
this.count=0;
this.limit=20;
this.noAdd=false;
this.add=$334;
this.back=$338;
this.foreward=$337;
this.draw=$336;
this.setButtons=$335;
this.last=$340;
this.first=$339;
}
function $334(x,y,level)
{
if(this.noAdd)return;
if(this.count <this.limit)
{
h=new ic$HistoryWindow(x,y,level)
this.cur=h;
if(this.top==null)
{
this.top=h;
this.bot=h;
this.count=1;
}
else
{
h.prev=this.bot;
this.bot.next=h;
this.bot=h;
this.count=this.count+1;
}
}
else
{
h=this.top;
h.x=parseFloat(x);
h.y=parseFloat(y);
h.level=parseInt(level);
h.next.prev=null;
this.top=h.next;
this.bot.next=h;
h.prev=this.bot;
h.next=null;
this.bot=h;
this.cur=h;
}
this.setButtons();
}
function $335()
{
obj=getObject('historyPrev');
if(obj)obj.src=this.first();
obj=getObject('historyNext');
if(obj)obj.src=this.last();
}
function $336()
{
if(this.cur==null)return;
this.noAdd=true;
goLevel(this.cur.level);
goXY(this.cur.x,this.cur.y);
draw();
if(window.parent)window.parent.moveTo(ID,this.cur.x,this.cur.y);
this.noAdd=false;
this.setButtons();
}
function $337()
{
if(this.cur==null)return null;
if(this.cur.next==null)return null;
this.cur=this.cur.next;
this.draw();
}
function $338()
{
if(this.cur==null)return null;
if(this.cur.prev==null)return null;
this.cur=this.cur.prev;
this.draw();
}
function $339()
{
if(this.cur==null)return"images/viewBackOff.gif";
if(this.cur.prev==null)return"images/viewBackOff.gif";
return"images/viewBackOn.gif";
}
function $340()
{
if(this.cur==null)return"images/viewForewardOff.gif";
if(this.cur.next==null)return"images/viewForewardOff.gif";
return"images/viewForewardOn.gif";
}