Form.js
/**
* @class Ext.form.Form
* @extends Ext.form.BasicForm
* Adds the ability to dynamically render forms with JS to {@link Ext.form.BasicForm}.
* @constructor
* @param {Object} config Configuration options
*/
Ext.form.Form = function(config){
Ext.form.Form.superclass.constructor.call(this, null, config);
this.url = this.url || this.action;
if(!this.root){
this.root = new Ext.form.Layout(Ext.applyIf({
id: Ext.id()
}, config));
}
this.active = this.root;
/**
* Array of all the buttons that have been added to this form via addButton
* @type Array
*/
this.buttons = [];
this.addEvents({
/**
* @event clientvalidation
* If the monitorValid config option is true, this event fires repetitively to notify of valid state
* @param {Form} this
* @param {Boolean} valid true if the form has passed client-side validation
*/
clientvalidation: true
});
};
Ext.extend(Ext.form.Form, Ext.form.BasicForm, {
/**
* @cfg {Number} labelWidth The width of labels. This property cascades to child containers.
*/
// holder
/***
* @cfg {String} itemCls A css class to apply to the x-form-item of fields. This property cascades to child containers.
*/
// holder
/***
* @cfg {String} buttonAlign Valid values are "left," "center" and "right" (defaults to "center")
*/
buttonAlign:'center',
/**
* @cfg {Number} minButtonWidth Minimum width of all buttons (defaults to 75)
*/
minButtonWidth:75,
/**
* @cfg {String} labelAlign Valid values are "left," "top" and "right" (defaults to "left").
* This property cascades to child containers if not set.
*/
labelAlign:'left',
/**
* @cfg {Boolean} monitorValid If true the form monitors it's valid state <b>client-side</b> and
* fires a looping event with that state. This is required to bind buttons to the valid
* state using the config value bindForm:true on the button.
*/
monitorValid : false,
/**
* @cfg {Number} monitorPoll The milliseconds to poll valid state, ignored if monitorValid is not true (defaults to 200)
*/
monitorPoll : 200,
/**
* Opens the a new {@link Ext.form.Column} container in the layout stack. If fields are passed after the config, the
* fields are added and the column is closed. If no fields are passed the column remains open
* until end() is called.
* @param {Object} config The config to pass to the column
* @param {Field} field1 （可选）
* @param {Field} field2 （可选）
* @param {Field} etc （可选）
* @return Column The column container object
*/
column : function(c){
var col = new Ext.form.Column(c);
this.start(col);
if(arguments.length > 1){ // duplicate code required because of Opera
this.add.apply(this, Array.prototype.slice.call(arguments, 1));
this.end();
}
return col;
},
/**
* Opens the a new {@link Ext.form.FieldSet} container in the layout stack. If fields are passed after the config, the
* fields are added and the fieldset is closed. If no fields are passed the fieldset remains open
* until end() is called.
* @param {Object} config The config to pass to the fieldset
* @param {Field} field1 （可选）
* @param {Field} field2 （可选）
* @param {Field} etc （可选）
* @return FieldSet The fieldset container object
*/
fieldset : function(c){
var fs = new Ext.form.FieldSet(c);
this.start(fs);
if(arguments.length > 1){ // duplicate code required because of Opera
this.add.apply(this, Array.prototype.slice.call(arguments, 1));
this.end();
}
return fs;
},
/**
* Opens the a new {@link Ext.form.Layout} container in the layout stack. If fields are passed after the config, the
* fields are added and the container is closed. If no fields are passed the container remains open
* until end() is called.
* @param {Object} config The config to pass to the Layout
* @param {Field} field1 （可选）
* @param {Field} field2 （可选）
* @param {Field} etc （可选）
* @return Layout The container object
*/
container : function(c){
var l = new Ext.form.Layout(c);
this.start(l);
if(arguments.length > 1){ // duplicate code required because of Opera
this.add.apply(this, Array.prototype.slice.call(arguments, 1));
this.end();
}
return l;
},
/**
* Opens the passed container in the layout stack. The container can be any {@link Ext.form.Layout} or subclass.
* @param {Object} container A Ext.form.Layout or subclass of Layout
* @return {Form} this
*/
start : function(c){
// cascade label info
Ext.applyIf(c, {'labelAlign': this.active.labelAlign, 'labelWidth': this.active.labelWidth, 'itemCls': this.active.itemCls});
this.active.stack.push(c);
c.ownerCt = this.active;
this.active = c;
return this;
},
/**
* Closes the current open container
* @return {Form} this
*/
end : function(){
if(this.active == this.root){
return this;
}
this.active = this.active.ownerCt;
return this;
},
/**
* Add Ext.form components to the current open container (e.g. column, fieldset, etc)
* @param {Field} field1
* @param {Field} field2 （可选）
* @param {Field} etc （可选）
* @return {Form} this
*/
add : function(){
this.active.stack.push.apply(this.active.stack, arguments);
var r = [];
for(var i = 0, a = arguments, len = a.length; i < len; i++) {
if(a[i].isFormField){
r.push(a[i]);
}
}
if(r.length > 0){
Ext.form.Form.superclass.add.apply(this, r);
}
return this;
},
/**
* Render this form into the passed container. This should only be called once!
* @param {String/HTMLElement/Element} container The element this component should be rendered into
* @return {Form} this
*/
render : function(ct){
ct = Ext.get(ct);
var o = this.autoCreate || {
tag: 'form',
method : this.method || 'POST',
id : this.id || Ext.id()
};
this.initEl(ct.createChild(o));
this.root.render(this.el);
this.items.each(function(f){
f.render('x-form-el-'+f.id);
});
if(this.buttons.length > 0){
// tables are required to maintain order and for correct IE layout
var tb = this.el.createChild({cls:'x-form-btns-ct', cn: {
cls:"x-form-btns x-form-btns-"+this.buttonAlign,
html:'<table cellspacing="0"><tbody><tr></tr></tbody></table><div class="x-clear"></div>'
}}, null, true);
var tr = tb.getElementsByTagName('tr')[0];
for(var i = 0, len = this.buttons.length; i < len; i++) {
var b = this.buttons[i];
var td = document.createElement('td');
td.className = 'x-form-btn-td';
b.render(tr.appendChild(td));
}
}
if(this.monitorValid){ // initialize after render
this.startMonitoring();
}
return this;
},
/**
* Adds a button to the footer of the form - this <b>must</b> be called before the form is rendered.
* @param {String/Object} config A string becomes the button text, an object can either be a Button config
* object or a valid Ext.DomHelper element config
* @param {Function} handler The function called when the button is clicked
* @param {Object} scope （可选） The scope of the handler function
* @return {Ext.Button}
*/
addButton : function(config, handler, scope){
var bc = {
handler: handler,
scope: scope,
minWidth: this.minButtonWidth,
hideParent:true
};
if(typeof config == "string"){
bc.text = config;
}else{
Ext.apply(bc, config);
}
var btn = new Ext.Button(null, bc);
this.buttons.push(btn);
return btn;
},
/**
* Starts monitoring of the valid state of this form. Usually this is don't by passing the config
* option "monitorValid"
*/
startMonitoring : function(){
if(!this.bound){
this.bound = true;
Ext.TaskMgr.start({
run : this.bindHandler,
interval : this.monitorPoll || 200,
scope: this
});
}
},
/**
* Stops monitoring of the valid state of this form
*/
stopMonitoring : function(){
this.bound = false;
},
// private
bindHandler : function(){
if(!this.bound){
return false; // stops binding
}
var valid = true;
this.items.each(function(f){
if(!f.isValid(true)){
valid = false;
return false;
}
});
for(var i = 0, len = this.buttons.length; i < len; i++){
var btn = this.buttons[i];
if(btn.formBind === true && btn.disabled === valid){
btn.setDisabled(!valid);
}
}
this.fireEvent('clientvalidation', this, valid);
}
});
// back compat
Ext.Form = Ext.form.Form;
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