116 lines
3.6 KiB
JavaScript
116 lines
3.6 KiB
JavaScript
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/*
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* Ext JS Library 2.3.0
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* Copyright(c) 2006-2009, Ext JS, LLC.
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* licensing@extjs.com
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*
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* http://extjs.com/license
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*/
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/**
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* @class Ext.form.TextArea
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* @extends Ext.form.TextField
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* Multiline text field. Can be used as a direct replacement for traditional textarea fields, plus adds
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* support for auto-sizing.
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* @constructor
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* Creates a new TextArea
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* @param {Object} config Configuration options
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*/
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Ext.form.TextArea = Ext.extend(Ext.form.TextField, {
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/**
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* @cfg {Number} growMin The minimum height to allow when grow = true (defaults to 60)
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*/
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growMin : 60,
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/**
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* @cfg {Number} growMax The maximum height to allow when grow = true (defaults to 1000)
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*/
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growMax: 1000,
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growAppend : ' \n ',
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growPad : Ext.isWebKit ? -6 : 0,
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enterIsSpecial : false,
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/**
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* @cfg {Boolean} preventScrollbars True to prevent scrollbars from appearing regardless of how much text is
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* in the field (equivalent to setting overflow: hidden, defaults to false)
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*/
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preventScrollbars: false,
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/**
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* @cfg {String/Object} autoCreate A DomHelper element spec, or true for a default element spec (defaults to
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* {tag: "textarea", style: "width:100px;height:60px;", autocomplete: "off"})
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*/
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// private
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onRender : function(ct, position){
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if(!this.el){
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this.defaultAutoCreate = {
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tag: "textarea",
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style:"width:100px;height:60px;",
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autocomplete: "off"
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};
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}
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Ext.form.TextArea.superclass.onRender.call(this, ct, position);
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if(this.grow){
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this.textSizeEl = Ext.DomHelper.append(document.body, {
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tag: "pre", cls: "x-form-grow-sizer"
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});
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if(this.preventScrollbars){
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this.el.setStyle("overflow", "hidden");
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}
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this.el.setHeight(this.growMin);
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}
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},
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onDestroy : function(){
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if(this.textSizeEl){
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Ext.removeNode(this.textSizeEl);
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}
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Ext.form.TextArea.superclass.onDestroy.call(this);
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},
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fireKey : function(e){
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if(e.isSpecialKey() && (this.enterIsSpecial || (e.getKey() != e.ENTER || e.hasModifier()))){
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this.fireEvent("specialkey", this, e);
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}
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},
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// private
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onKeyUp : function(e){
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if(!e.isNavKeyPress() || e.getKey() == e.ENTER){
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this.autoSize();
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}
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Ext.form.TextArea.superclass.onKeyUp.call(this, e);
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},
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/**
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* Automatically grows the field to accomodate the height of the text up to the maximum field height allowed.
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* This only takes effect if grow = true, and fires the {@link #autosize} event if the height changes.
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*/
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autoSize: function(){
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if(!this.grow || !this.textSizeEl){
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return;
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}
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var el = this.el;
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var v = el.dom.value;
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var ts = this.textSizeEl;
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ts.innerHTML = '';
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ts.appendChild(document.createTextNode(v));
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v = ts.innerHTML;
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Ext.fly(ts).setWidth(this.el.getWidth());
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if(v.length < 1){
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v = "  ";
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}else{
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v += this.growAppend;
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if(Ext.isIE){
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v = v.replace(/\n/g, '<br />');
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}
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}
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ts.innerHTML = v;
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var h = Math.min(this.growMax, Math.max(ts.offsetHeight, this.growMin) + this.growPad);
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if(h != this.lastHeight){
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this.lastHeight = h;
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this.el.setHeight(h);
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this.fireEvent("autosize", this, h);
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}
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}
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});
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Ext.reg('textarea', Ext.form.TextArea);
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