/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.charting.vml.Axis");
dojo.require("dojo.lang.common");

dojo.extend(dojo.charting.Axis, {
	renderLines: function(
		/* dojo.charting.PlotArea */plotArea, 
		/* dojo.charting.Plot */plot, 
		/* string */plane
	){
		//	summary
		//	Renders any reference lines for this axis.
		if(this.nodes.lines){
			while(this.nodes.lines.childNodes.length > 0){
				this.nodes.lines.removeChild(this.nodes.lines.childNodes[0]);
			}
			if(this.nodes.lines.parentNode){
				this.nodes.lines.parentNode.removeChild(this.nodes.lines);
				this.nodes.lines = null;
			}
		}
		
		var area = plotArea.getArea();
		var g = this.nodes.lines = document.createElement("div");
		g.setAttribute("id", this.getId()+"-lines");
		for(var i=0; i<this._labels.length; i++){
			if (this._labels[i].value == this.origin){ continue; }

			var v = this.getCoord(this._labels[i].value, plotArea, plot);
			var l=document.createElement("v:line");
			var str=document.createElement("v:stroke");
			str.dashstyle="dot";
			l.appendChild(str);
			l.setAttribute("strokecolor", "#666");
			l.setAttribute("strokeweight", "1px");
			var s=l.style;
			s.position="absolute";
			s.top="0px";
			s.left="0px";
			s.antialias="false";
			if(plane == "x"){
				l.setAttribute("from", v+"px,"+area.top+"px");
				l.setAttribute("to", v+"px,"+area.bottom+"px");
			}
			else if (plane == "y"){
				l.setAttribute("from", area.left+"px,"+v+"px");
				l.setAttribute("to", area.right+"px,"+v+"px");
			}
			g.appendChild(l);
		}
		return g;	//	HTMLDivElement
	},
	renderTicks: function(
		/* dojo.charting.PlotArea */plotArea, 
		/* dojo.charting.Plot */plot, 
		/* string */plane,
		/* float */coord
	){
		//	summary
		//	Renders any tick lines for this axis.
		if(this.nodes.ticks){
			while(this.nodes.ticks.childNodes.length > 0){
				this.nodes.ticks.removeChild(this.nodes.ticks.childNodes[0]);
			}
			if(this.nodes.ticks.parentNode){
				this.nodes.ticks.parentNode.removeChild(this.nodes.ticks);
				this.nodes.ticks = null;
			}
		}
		
		var g = this.nodes.ticks = document.createElement("div");
		g.setAttribute("id", this.getId()+"-ticks");
		for(var i=0; i<this._labels.length; i++){
			var v = this.getCoord(this._labels[i].value, plotArea, plot);

			var l=document.createElement("v:line");
			l.setAttribute("strokecolor", "#000");
			l.setAttribute("strokeweight", "1px");
			var s=l.style;
			s.position="absolute";
			s.top="0px";
			s.left="0px";
			s.antialias="false";
			if(plane == "x"){
				l.setAttribute("from", v+"px,"+coord+"px");
				l.setAttribute("to", v+"px,"+(coord+3)+"px");
			}
			else if (plane == "y"){
				l.setAttribute("from", (coord-2)+"px,"+v+"px");
				l.setAttribute("to", (coord+2)+"px,"+v+"px");
			}
			g.appendChild(l);
		}
		return g;	//	HTMLDivElement
	},
	renderLabels: function(
		/* dojo.charting.PlotArea */plotArea, 
		/* dojo.charting.Plot */plot, 
		/* string */plane,
		/* float */coord,
		/* int */textSize,
		/* string */anchor
	){
		//	summary
		//	Render all labels for this axis.
		function createLabel(label, x, y, textSize, anchor){
			var text = document.createElement("div");
			var s=text.style;
			text.innerHTML=label;
			s.fontSize=textSize+"px";
			s.fontFamily="sans-serif";
			s.position="absolute";
			s.top = y+"px";
			if(anchor == "center"){
				s.left = x + "px";
				s.textAlign="center";
			} else if (anchor == "left"){
				s.left = x + "px";
				s.textAlign="left";
			} else if (anchor == "right"){
				s.right = x + "px";
				s.textAlign="right";
			}
			return text;
		};

		//	wipe if needed
		if(this.nodes.labels){
			while(this.nodes.labels.childNodes.length > 0){
				this.nodes.labels.removeChild(this.nodes.labels.childNodes[0]);
			}
			if(this.nodes.labels.parentNode){
				this.nodes.labels.parentNode.removeChild(this.nodes.labels);
				this.nodes.labels = null;
			}
		}
		var g = this.nodes.labels = document.createElement("div");
		g.setAttribute("id", this.getId()+"-labels");

		for(var i=0; i<this._labels.length; i++){
			var v = this.getCoord(this._labels[i].value, plotArea, plot);
			if(plane == "x"){
				//	ugly hack but it works.
				var node=createLabel(this._labels[i].label, v, coord, textSize, anchor);
				document.body.appendChild(node);
				node.style.left = v-(node.offsetWidth/2)+"px";
				g.appendChild(node);
			}
			else if (plane == "y"){
				var node = createLabel(this._labels[i].label, coord, v, textSize, anchor);
				document.body.appendChild(node);
				node.style.top = v-(node.offsetHeight/2)+"px";
				g.appendChild(node);
			}
		}
		return g;	//	HTMLDivElement
	},
	render: function(
		/* dojo.charting.PlotArea */plotArea, 
		/* dojo.charting.Plot */plot,
		/* dojo.charting.Axis */drawAgainst,
		/* string */plane
	){
		//	summary
		//	Renders this axis to the given plot.

		//	get the origin plot point.
		var area = plotArea.getArea();
		var stroke = 1;
		var style = "stroke:#000;stroke-width:"+stroke+"px;";
		var textSize=10;
		var coord = drawAgainst.getCoord(this.origin, plotArea, plot);

		//	draw the axis.
		var g = this.nodes.main = document.createElement("div");
		g.setAttribute("id", this.getId());	//	need a handle if we have to kill parts of the axis def.
		var line = this.nodes.axis = document.createElement("v:line");
		line.setAttribute("strokecolor", "#000");
		line.setAttribute("strokeweight", stroke+"px");
		var s=line.style;
		s.position="absolute";
		s.top="0px";
		s.left="0px";
		s.antialias="false";
		if(plane == "x"){
			line.setAttribute("from", area.left+"px,"+coord+"px");
			line.setAttribute("to", area.right+"px,"+coord+"px");

			//	set up the labels
			var y = coord + Math.floor(textSize/2);
			if(this.showLines){
				g.appendChild(this.renderLines(plotArea, plot, plane, y));
			}
			if(this.showTicks){
				g.appendChild(this.renderTicks(plotArea, plot, plane, coord));
			}
			if(this.showLabels){
				g.appendChild(this.renderLabels(plotArea, plot, plane, y, textSize, "center"));
			}
			if(this.showLabel && this.label){
				var x = plotArea.size.width/2;
				var y = coord + Math.round(textSize*1.5); 
				var text = document.createElement("div");
				var s=text.style;
				text.innerHTML=this.label;
				s.fontSize=(textSize+2)+"px";
				s.fontFamily="sans-serif";
				s.fontWeight="bold";
				s.position="absolute";
				s.top = y+"px";
				s.left = x + "px";
				s.textAlign="center";
				document.body.appendChild(text);
				text.style.left = x-(text.offsetWidth/2)+"px";
				g.appendChild(text);
			}
		} else {
			line.setAttribute("from", coord+"px,"+area.top+"px");
			line.setAttribute("to", coord+"px,"+area.bottom+"px");

			//	set up the labels
			var isMax = this.origin == drawAgainst.range.upper;
			var x = coord+4;
			var anchor = "left";
			if(!isMax){
				x = area.right-coord+textSize+4;
				anchor = "right";
				if(coord == area.left){ x += (textSize*2)-(textSize/2); }
			}
			if(this.showLines){
				g.appendChild(this.renderLines(plotArea, plot, plane, x));
			}
			if(this.showTicks){
				g.appendChild(this.renderTicks(plotArea, plot, plane, coord));
			}
			if(this.showLabels){
				g.appendChild(this.renderLabels(plotArea, plot, plane, x, textSize, anchor));
			}
			if(this.showLabel && this.label){
				x += (textSize*2)-2;
				var y = plotArea.size.height/2;
				var text = document.createElement("div");
				var s=text.style;
				text.innerHTML=this.label;
				s.fontSize=(textSize+2)+"px";
				s.fontFamily="sans-serif";
				s.fontWeight="bold";
				s.position="absolute";
				s.height = plotArea.size.height+"px";
				s.writingMode = "tb-rl";
				s.textAlign="center";
				s[anchor] = x+"px";
				document.body.appendChild(text);
				s.top = y-(text.offsetHeight/2)+"px";
				g.appendChild(text);
			}
		}
		g.appendChild(line);
		return g;	//	HTMLDivElement
	}
});
