flymis/WebRoot/dojojs/src/gfx/path.js

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/*
	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.gfx.path");

dojo.require("dojo.math");

dojo.require("dojo.gfx.shape");

dojo.declare("dojo.gfx.path.Path", dojo.gfx.Shape, {
	// summary:
	//		a path shape
	initializer: function(/* Node */ rawNode){
		// summary: a constructor of a path shape object
		// rawNode: a DOM node to be used by this path object
		this.shape = dojo.lang.shallowCopy(dojo.gfx.defaultPath, true);
		this.segments = [];
		this.absolute = true;
		this.last = {};
		this.attach(rawNode);
	},
	
	// mode manipulations
	setAbsoluteMode: function(/* Boolean||String */ mode){
		// summary: sets an absolute or relative mode for path points
		// mode: true/false or "absolute"/"relative" to specify the mode
		this.absolute = typeof(mode) == "string" ? (mode == "absolute") : mode;
		return this; // self
	},
	getAbsoluteMode: function(){
		// summary: returns a current value of the absolute mode
		return this.absolute; // Boolean
	},
	getBoundingBox: function(){
		// summary: returns a bounding box {x, y, width, height} or null
		return "l" in this.bbox ? {x: this.bbox.l, y: this.bbox.t, width: this.bbox.r - this.bbox.l, height: this.bbox.b - this.bbox.t} : null; // Object
	},
	getLastPosition: function(){
		// summary: returns the last point in the path, or null
		return "x" in this.last ? this.last : null; // Object
	},
	
	// segment interpretation
	_updateBBox: function(/* Number */ x, /* Number */ y){
		// summary: updates a bounding box of path with new point
		
		// we use {l, b, r, t} representation of a bbox
		if("l" in this.bbox){
			if(this.bbox.l > x) this.bbox.l = x;
			if(this.bbox.r < x) this.bbox.r = x;
			if(this.bbox.t > y) this.bbox.t = y;
			if(this.bbox.b < y) this.bbox.b = y;
		}else{
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