/**
+ * @class Ext.form.FieldContainer
+ * @extends Ext.container.Container
+
+FieldContainer is a derivation of {@link Ext.container.Container Container} that implements the
+{@link Ext.form.Labelable Labelable} mixin. This allows it to be configured so that it is rendered with
+a {@link #fieldLabel field label} and optional {@link #msgTarget error message} around its sub-items.
+This is useful for arranging a group of fields or other components within a single item in a form, so
+that it lines up nicely with other fields. A common use is for grouping a set of related fields under
+a single label in a form.
+
+The container's configured {@link #items} will be layed out within the field body area according to the
+configured {@link #layout} type. The default layout is `'autocontainer'`.
+
+Like regular fields, FieldContainer can inherit its decoration configuration from the
+{@link Ext.form.Panel#fieldDefaults fieldDefaults} of an enclosing FormPanel. In addition,
+FieldContainer itself can pass {@link #fieldDefaults} to any {@link Ext.form.Labelable fields}
+it may itself contain.
+
+If you are grouping a set of {@link Ext.form.field.Checkbox Checkbox} or {@link Ext.form.field.Radio Radio}
+fields in a single labeled container, consider using a {@link Ext.form.CheckboxGroup}
+or {@link Ext.form.RadioGroup} instead as they are specialized for handling those types.
+{@img Ext.form.FieldContainer/Ext.form.FieldContainer1.png Ext.form.FieldContainer component}
+__Example usage:__
+
+ Ext.create('Ext.form.Panel', {
+ title: 'FieldContainer Example',
+ width: 550,
+ bodyPadding: 10,
+
+ items: [{
+ xtype: 'fieldcontainer',
+ fieldLabel: 'Last Three Jobs',
+ labelWidth: 100,
+
+ // The body area will contain three text fields, arranged
+ // horizontally, separated by draggable splitters.
+ layout: 'hbox',
+ items: [{
+ xtype: 'textfield',
+ flex: 1
+ }, {
+ xtype: 'splitter'
+ }, {
+ xtype: 'textfield',
+ flex: 1
+ }, {
+ xtype: 'splitter'
+ }, {
+ xtype: 'textfield',
+ flex: 1
+ }]
+ }],
+ renderTo: Ext.getBody()
+ });
+
+__Usage of {@link #fieldDefaults}:__
+{@img Ext.form.FieldContainer/Ext.form.FieldContainer2.png Ext.form.FieldContainer component}
+
+ Ext.create('Ext.form.Panel', {
+ title: 'FieldContainer Example',
+ width: 350,
+ bodyPadding: 10,
+
+ items: [{
+ xtype: 'fieldcontainer',
+ fieldLabel: 'Your Name',
+ labelWidth: 75,
+ defaultType: 'textfield',
+
+ // Arrange fields vertically, stretched to full width
+ layout: 'anchor',
+ defaults: {
+ layout: '100%'
+ },
+
+ // These config values will be applied to both sub-fields, except
+ // for Last Name which will use its own msgTarget.
+ fieldDefaults: {
+ msgTarget: 'under',
+ labelAlign: 'top'
+ },
+
+ items: [{
+ fieldLabel: 'First Name',
+ name: 'firstName'
+ }, {
+ fieldLabel: 'Last Name',
+ name: 'lastName',
+ msgTarget: 'under'
+ }]
+ }],
+ renderTo: Ext.getBody()
+ });
+
+
+ * @constructor
+ * Creates a new Ext.form.FieldContainer instance.
+ * @param {Object} config The component configuration.
+ *
+ * @xtype fieldcontainer
+ * @markdown
+ * @docauthor Jason Johnston <jason@sencha.com>
+ */
+Ext.define('Ext.form.FieldContainer', {
+ extend: 'Ext.container.Container',
+ mixins: {
+ labelable: 'Ext.form.Labelable',
+ fieldAncestor: 'Ext.form.FieldAncestor'
+ },
+ alias: 'widget.fieldcontainer',
+
+ componentLayout: 'field',
+
+ /**
+ * @cfg {Boolean} combineLabels
+ * If set to true, and there is no defined {@link #fieldLabel}, the field container will automatically
+ * generate its label by combining the labels of all the fields it contains. Defaults to false.
+ */
+ combineLabels: false,
+
+ /**
+ * @cfg {String} labelConnector
+ * The string to use when joining the labels of individual sub-fields, when {@link #combineLabels} is
+ * set to true. Defaults to ', '.
+ */
+ labelConnector: ', ',
+
+ /**
+ * @cfg {Boolean} combineErrors
+ * If set to true, the field container will automatically combine and display the validation errors from
+ * all the fields it contains as a single error on the container, according to the configured
+ * {@link #msgTarget}. Defaults to false.
+ */
+ combineErrors: false,
+
+ maskOnDisable: false,
+
+ initComponent: function() {
+ var me = this,
+ onSubCmpAddOrRemove = me.onSubCmpAddOrRemove;
+
+ // Init mixins
+ me.initLabelable();
+ me.initFieldAncestor();
+
+ me.callParent();
+ },
+
+ /**
+ * @protected Called when a {@link Ext.form.Labelable} instance is added to the container's subtree.
+ * @param {Ext.form.Labelable} labelable The instance that was added
+ */
+ onLabelableAdded: function(labelable) {
+ var me = this;
+ me.mixins.fieldAncestor.onLabelableAdded.call(this, labelable);
+ me.updateLabel();
+ },
+
+ /**
+ * @protected Called when a {@link Ext.form.Labelable} instance is removed from the container's subtree.
+ * @param {Ext.form.Labelable} labelable The instance that was removed
+ */
+ onLabelableRemoved: function(labelable) {
+ var me = this;
+ me.mixins.fieldAncestor.onLabelableRemoved.call(this, labelable);
+ me.updateLabel();
+ },
+
+ onRender: function() {
+ var me = this,
+ renderSelectors = me.renderSelectors,
+ applyIf = Ext.applyIf;
+
+ applyIf(renderSelectors, me.getLabelableSelectors());
+
+ me.callParent(arguments);
+ },
+
+ initRenderTpl: function() {
+ var me = this;
+ if (!me.hasOwnProperty('renderTpl')) {
+ me.renderTpl = me.getTpl('labelableRenderTpl');
+ }
+ return me.callParent();
+ },
+
+ initRenderData: function() {
+ return Ext.applyIf(this.callParent(), this.getLabelableRenderData());
+ },
+
+ /**
+ * Returns the combined field label if {@link #combineLabels} is set to true and if there is no
+ * set {@link #fieldLabel}. Otherwise returns the fieldLabel like normal. You can also override
+ * this method to provide a custom generated label.
+ */
+ getFieldLabel: function() {
+ var label = this.fieldLabel || '';
+ if (!label && this.combineLabels) {
+ label = Ext.Array.map(this.query('[isFieldLabelable]'), function(field) {
+ return field.getFieldLabel();
+ }).join(this.labelConnector);
+ }
+ return label;
+ },
+
+ /**
+ * @private Updates the content of the labelEl if it is rendered
+ */
+ updateLabel: function() {
+ var me = this,
+ label = me.labelEl;
+ if (label) {
+ label.update(me.getFieldLabel());
+ }
+ },
+
+
+ /**
+ * @private Fired when the error message of any field within the container changes, and updates the
+ * combined error message to match.
+ */
+ onFieldErrorChange: function(field, activeError) {
+ if (this.combineErrors) {
+ var me = this,
+ oldError = me.getActiveError(),
+ invalidFields = Ext.Array.filter(me.query('[isFormField]'), function(field) {
+ return field.hasActiveError();
+ }),
+ newErrors = me.getCombinedErrors(invalidFields);
+
+ if (newErrors) {
+ me.setActiveErrors(newErrors);
+ } else {
+ me.unsetActiveError();
+ }
+
+ if (oldError !== me.getActiveError()) {
+ me.doComponentLayout();
+ }
+ }
+ },
+
+ /**
+ * Takes an Array of invalid {@link Ext.form.field.Field} objects and builds a combined list of error
+ * messages from them. Defaults to prepending each message by the field name and a colon. This
+ * can be overridden to provide custom combined error message handling, for instance changing
+ * the format of each message or sorting the array (it is sorted in order of appearance by default).
+ * @param {Array} invalidFields An Array of the sub-fields which are currently invalid.
+ * @return {Array} The combined list of error messages
+ */
+ getCombinedErrors: function(invalidFields) {
+ var forEach = Ext.Array.forEach,
+ errors = [];
+ forEach(invalidFields, function(field) {
+ forEach(field.getActiveErrors(), function(error) {
+ var label = field.getFieldLabel();
+ errors.push((label ? label + ': ' : '') + error);
+ });
+ });
+ return errors;
+ },
+
+ getTargetEl: function() {
+ return this.bodyEl || this.callParent();
+ }
+});
+