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/**
* Wrapper for VML element.
* @constructor
* @extends jvm.AbstractElement
* @param {String} name Tag name of the element
* @param {Object} config Set of parameters to initialize element with
*/
jvm.VMLElement = function(name, config){
if (!jvm.VMLElement.VMLInitialized) {
jvm.VMLElement.initializeVML();
}
jvm.VMLElement.parentClass.apply(this, arguments);
};
jvm.inherits(jvm.VMLElement, jvm.AbstractElement);
/**
* Shows if VML was already initialized for the current document or not.
* @static
* @private
* @type {Boolean}
*/
jvm.VMLElement.VMLInitialized = false;
/**
* Initializes VML handling before creating the first element
* (adds CSS class and creates namespace). Adds one of two forms
* of createElement method depending of support by browser.
* @static
* @private
*/
// The following method of VML handling is borrowed from the
// Raphael library by Dmitry Baranovsky.
jvm.VMLElement.initializeVML = function(){
try {
if (!document.namespaces.rvml) {
document.namespaces.add("rvml","urn:schemas-microsoft-com:vml");
}
/**
* Creates DOM element.
* @param {String} tagName Name of element
* @private
* @returns DOMElement
*/
jvm.VMLElement.prototype.createElement = function (tagName) {
return document.createElement('<rvml:' + tagName + ' class="rvml">');
};
} catch (e) {
/**
* @private
*/
jvm.VMLElement.prototype.createElement = function (tagName) {
return document.createElement('<' + tagName + ' xmlns="urn:schemas-microsoft.com:vml" class="rvml">');
};
}
document.createStyleSheet().addRule(".rvml", "behavior:url(#default#VML)");
jvm.VMLElement.VMLInitialized = true;
};
/**
* Returns constructor for element by name prefixed with 'VML'.
* @param {String} ctr Name of basic constructor to return
* proper implementation for.
* @returns Function
* @private
*/
jvm.VMLElement.prototype.getElementCtr = function( ctr ){
return jvm['VML'+ctr];
};
/**
* Adds CSS class for underlying DOM element.
* @param {String} className Name of CSS class name
*/
jvm.VMLElement.prototype.addClass = function( className ){
jvm.$(this.node).addClass(className);
};
/**
* Applies attribute value to the underlying DOM element.
* @param {String} name Name of attribute
* @param {Number|String} config Value of attribute to apply
* @private
*/
jvm.VMLElement.prototype.applyAttr = function( attr, value ){
this.node[attr] = value;
};
/**
* Returns boundary box for the element.
* @returns {Object} Boundary box with numeric fields: x, y, width, height
* @override
*/
jvm.VMLElement.prototype.getBBox = function(){
var node = jvm.$(this.node);
return {
x: node.position().left / this.canvas.scale,
y: node.position().top / this.canvas.scale,
width: node.width() / this.canvas.scale,
height: node.height() / this.canvas.scale
};
};
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