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+Sencha Documentation Project/**
+ * @author Ed Spencer
+ * @class Ext.tab.Bar
+ * @extends Ext.panel.Header
+ * <p>TabBar is used internally by a {@link Ext.tab.Panel TabPanel} and wouldn't usually need to be created manually.</p>
+ *
+ * @xtype tabbar
+ */
+Ext.define('Ext.tab.Bar', {
+ extend: 'Ext.panel.Header',
+ alias: 'widget.tabbar',
+ baseCls: Ext.baseCSSPrefix + 'tab-bar',
+
+ requires: [
+ 'Ext.tab.Tab',
+ 'Ext.FocusManager'
+ ],
+
+ // @private
+ defaultType: 'tab',
+
+ /**
+ * @cfg Boolean plain
+ * True to not show the full background on the tabbar
+ */
+ plain: false,
+
+ // @private
+ renderTpl: [
+ '<div class="{baseCls}-body<tpl if="ui"> {baseCls}-body-{ui}<tpl for="uiCls"> {parent.baseCls}-body-{parent.ui}-{.}</tpl></tpl>"<tpl if="bodyStyle"> style="{bodyStyle}"</tpl>></div>',
+ '<div class="{baseCls}-strip<tpl if="ui"> {baseCls}-strip-{ui}<tpl for="uiCls"> {parent.baseCls}-strip-{parent.ui}-{.}</tpl></tpl>"></div>'
+ ],
+
+ /**
+ * @cfg {Number} minTabWidth The minimum width for each tab. Defaults to <tt>30</tt>.
+ */
+ minTabWidth: 30,
+
+ /**
+ * @cfg {Number} maxTabWidth The maximum width for each tab. Defaults to <tt>undefined</tt>.
+ */
+ maxTabWidth: undefined,
+
+ // @private
+ initComponent: function() {
+ var me = this,
+ keys;
+
+ if (me.plain) {
+ me.setUI(me.ui + '-plain');
+ }
+
+ me.addClsWithUI(me.dock);
+
+ me.addEvents(
+ /**
+ * @event change
+ * Fired when the currently-active tab has changed
+ * @param {Ext.tab.Bar} tabBar The TabBar
+ * @param {Ext.Tab} tab The new Tab
+ * @param {Ext.Component} card The card that was just shown in the TabPanel
+ */
+ 'change'
+ );
+
+ Ext.applyIf(this.renderSelectors, {
+ body : '.' + this.baseCls + '-body',
+ strip: '.' + this.baseCls + '-strip'
+ });
+ me.callParent(arguments);
+
+ // TabBar must override the Header's align setting.
+ me.layout.align = (me.orientation == 'vertical') ? 'left' : 'top';
+ me.layout.overflowHandler = Ext.create('Ext.layout.container.boxOverflow.Scroller', me.layout);
+ me.items.removeAt(me.items.getCount() - 1);
+ me.items.removeAt(me.items.getCount() - 1);
+
+ // Subscribe to Ext.FocusManager for key navigation
+ keys = me.orientation == 'vertical' ? ['up', 'down'] : ['left', 'right'];
+ Ext.FocusManager.subscribe(me, {
+ keys: keys
+ });
+ },
+
+ // @private
+ onAdd: function(tab) {
+ var me = this,
+ tabPanel = me.tabPanel,
+ hasOwner = !!tabPanel;
+
+ me.callParent(arguments);
+ tab.position = me.dock;
+ if (hasOwner) {
+ tab.minWidth = tabPanel.minTabWidth;
+ }
+ else {
+ tab.minWidth = me.minTabWidth + (tab.iconCls ? 25 : 0);
+ }
+ tab.maxWidth = me.maxTabWidth || (hasOwner ? tabPanel.maxTabWidth : undefined);
+ },
+
+ // @private
+ afterRender: function() {
+ var me = this;
+
+ me.mon(me.el, {
+ scope: me,
+ click: me.onClick,
+ delegate: '.' + Ext.baseCSSPrefix + 'tab'
+ });
+ me.callParent(arguments);
+
+ },
+
+ afterComponentLayout : function() {
+ var me = this;
+
+ me.callParent(arguments);
+ me.strip.setWidth(me.el.getWidth());
+ },
+
+ // @private
+ onClick: function(e, target) {
+ // The target might not be a valid tab el.
+ var tab = Ext.getCmp(target.id),
+ tabPanel = this.tabPanel;
+
+ target = e.getTarget();
+
+ if (tab && tab.isDisabled && !tab.isDisabled()) {
+ if (tab.closable && target === tab.closeEl.dom) {
+ tab.onCloseClick();
+ } else {
+ this.setActiveTab(tab);
+ if (tabPanel) {
+ tabPanel.setActiveTab(tab.card);
+ }
+ tab.focus();
+ }
+ }
+ },
+
+ /**
+ * @private
+ * Closes the given tab by removing it from the TabBar and removing the corresponding card from the TabPanel
+ * @param {Ext.Tab} tab The tab to close
+ */
+ closeTab: function(tab) {
+ var card = tab.card,
+ tabPanel = this.tabPanel,
+ nextTab;
+
+ if (tab.active && this.items.getCount() > 1) {
+ nextTab = tab.next('tab') || this.items.items[0];
+ this.setActiveTab(nextTab);
+ if (tabPanel) {
+ tabPanel.setActiveTab(nextTab.card);
+ }
+ }
+ this.remove(tab);
+
+ if (tabPanel && card) {
+ tabPanel.remove(card);
+ }
+
+ if (nextTab) {
+ nextTab.focus();
+ }
+ },
+
+ /**
+ * @private
+ * Marks the given tab as active
+ * @param {Ext.Tab} tab The tab to mark active
+ */
+ setActiveTab: function(tab) {
+ if (tab.disabled) {
+ return;
+ }
+ var me = this;
+ if (me.activeTab) {
+ me.activeTab.deactivate();
+ }
+ tab.activate();
+
+ if (me.rendered) {
+ me.layout.layout();
+ tab.el.scrollIntoView(me.layout.getRenderTarget());
+ }
+ me.activeTab = tab;
+ me.fireEvent('change', me, tab, tab.card);
+ }
+});
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