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<pre class="prettyprint lang-js"><span id='Ext-view-BoundListKeyNav'>/**
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</span> * A specialized {@link Ext.util.KeyNav} implementation for navigating a {@link Ext.view.BoundList} using
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* the keyboard. The up, down, pageup, pagedown, home, and end keys move the active highlight
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* through the list. The enter key invokes the selection model's select action using the highlighted item.
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*/
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Ext.define('Ext.view.BoundListKeyNav', {
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extend: 'Ext.util.KeyNav',
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requires: 'Ext.view.BoundList',
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<span id='Ext-view-BoundListKeyNav-cfg-boundList'> /**
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</span> * @cfg {Ext.view.BoundList} boundList (required)
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* The {@link Ext.view.BoundList} instance for which key navigation will be managed.
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*/
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constructor: function(el, config) {
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var me = this;
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me.boundList = config.boundList;
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me.callParent([el, Ext.apply({}, config, me.defaultHandlers)]);
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},
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<span id='Ext-view-BoundListKeyNav-property-defaultHandlers'> defaultHandlers: {
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</span> up: function() {
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var me = this,
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boundList = me.boundList,
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allItems = boundList.all,
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oldItem = boundList.highlightedItem,
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oldItemIdx = oldItem ? boundList.indexOf(oldItem) : -1,
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newItemIdx = oldItemIdx > 0 ? oldItemIdx - 1 : allItems.getCount() - 1; //wraps around
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me.highlightAt(newItemIdx);
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},
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down: function() {
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var me = this,
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boundList = me.boundList,
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allItems = boundList.all,
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oldItem = boundList.highlightedItem,
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oldItemIdx = oldItem ? boundList.indexOf(oldItem) : -1,
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newItemIdx = oldItemIdx < allItems.getCount() - 1 ? oldItemIdx + 1 : 0; //wraps around
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me.highlightAt(newItemIdx);
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},
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pageup: function() {
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//TODO
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},
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pagedown: function() {
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//TODO
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},
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home: function() {
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this.highlightAt(0);
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},
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end: function() {
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var me = this;
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me.highlightAt(me.boundList.all.getCount() - 1);
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},
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enter: function(e) {
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this.selectHighlighted(e);
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}
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},
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<span id='Ext-view-BoundListKeyNav-method-highlightAt'> /**
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</span> * Highlights the item at the given index.
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* @param {Number} index
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*/
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highlightAt: function(index) {
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var boundList = this.boundList,
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item = boundList.all.item(index);
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if (item) {
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item = item.dom;
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boundList.highlightItem(item);
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boundList.getTargetEl().scrollChildIntoView(item, false);
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}
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},
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<span id='Ext-view-BoundListKeyNav-method-selectHighlighted'> /**
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</span> * Triggers selection of the currently highlighted item according to the behavior of
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* the configured SelectionModel.
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*/
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selectHighlighted: function(e) {
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var me = this,
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boundList = me.boundList,
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highlighted = boundList.highlightedItem,
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selModel = boundList.getSelectionModel();
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if (highlighted) {
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selModel.selectWithEvent(boundList.getRecord(highlighted), e);
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}
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}
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});</pre>
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