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+<!DOCTYPE html><html><head><title>Sencha Documentation Project</title><link rel="stylesheet" href="../reset.css" type="text/css"><link rel="stylesheet" href="../prettify.css" type="text/css"><link rel="stylesheet" href="../prettify_sa.css" type="text/css"><script type="text/javascript" src="../prettify.js"></script></head><body onload="prettyPrint()"><pre class="prettyprint"><pre><span id='Ext-layout.container.Card'>/**
+</span> * @class Ext.layout.container.Card
+ * @extends Ext.layout.container.AbstractCard
+ * <p>This layout manages multiple child Components, each fitted to the Container, where only a single child Component can be
+ * visible at any given time. This layout style is most commonly used for wizards, tab implementations, etc.
+ * This class is intended to be extended or created via the layout:'card' {@link Ext.container.Container#layout} config,
+ * and should generally not need to be created directly via the new keyword.</p>
+ * <p>The CardLayout's focal method is {@link #setActiveItem}. Since only one panel is displayed at a time,
+ * the only way to move from one Component to the next is by calling setActiveItem, passing the id or index of
+ * the next panel to display. The layout itself does not provide a user interface for handling this navigation,
+ * so that functionality must be provided by the developer.</p>
+ * <p>In the following example, a simplistic wizard setup is demonstrated. A button bar is added
+ * to the footer of the containing panel to provide navigation buttons. The buttons will be handled by a
+ * common navigation routine -- for this example, the implementation of that routine has been ommitted since
+ * it can be any type of custom logic. Note that other uses of a CardLayout (like a tab control) would require a
+ * completely different implementation. For serious implementations, a better approach would be to extend
+ * CardLayout to provide the custom functionality needed.
+ * {@img Ext.layout.container.Card/Ext.layout.container.Card.png Ext.layout.container.Card container layout}
+ * Example usage:</p>
+ * <pre><code>
+ var navHandler = function(direction){
+ // This routine could contain business logic required to manage the navigation steps.
+ // It would call setActiveItem as needed, manage navigation button state, handle any
+ // branching logic that might be required, handle alternate actions like cancellation
+ // or finalization, etc. A complete wizard implementation could get pretty
+ // sophisticated depending on the complexity required, and should probably be
+ // done as a subclass of CardLayout in a real-world implementation.
+ };
+
+ Ext.create('Ext.panel.Panel', {
+ title: 'Example Wizard',
+ width: 300,
+ height: 200,
+ layout: 'card',
+ activeItem: 0, // make sure the active item is set on the container config!
+ bodyStyle: 'padding:15px',
+ defaults: {
+ // applied to each contained panel
+ border:false
+ },
+ // just an example of one possible navigation scheme, using buttons
+ bbar: [
+ {
+ id: 'move-prev',
+ text: 'Back',
+ handler: navHandler(this, [-1]),
+ disabled: true
+ },
+ '->', // greedy spacer so that the buttons are aligned to each side
+ {
+ id: 'move-next',
+ text: 'Next',
+ handler: navHandler(this, [1])
+ }],
+ // the panels (or "cards") within the layout
+ items: [{
+ id: 'card-0',
+ html: '&lt;h1&gt;Welcome to the Wizard!&lt;/h1&gt;&lt;p&gt;Step 1 of 3&lt;/p&gt;'
+ },{
+ id: 'card-1',
+ html: '&lt;p&gt;Step 2 of 3&lt;/p&gt;'
+ },{
+ id: 'card-2',
+ html: '&lt;h1&gt;Congratulations!&lt;/h1&gt;&lt;p&gt;Step 3 of 3 - Complete&lt;/p&gt;'
+ }],
+ renderTo: Ext.getBody()
+ });
+ </code></pre>
+ */
+Ext.define('Ext.layout.container.Card', {
+
+ /* Begin Definitions */
+
+ alias: ['layout.card'],
+ alternateClassName: 'Ext.layout.CardLayout',
+
+ extend: 'Ext.layout.container.AbstractCard',
+
+ /* End Definitions */
+
+ setActiveItem: function(newCard) {
+ var me = this,
+ owner = me.owner,
+ oldCard = me.activeItem,
+ newIndex;
+
+ // Block upward layouts until we are done.
+ me.layoutBusy = true;
+
+ newCard = me.parseActiveItem(newCard);
+ newIndex = owner.items.indexOf(newCard);
+
+ // If the card is not a child of the owner, then add it
+ if (newIndex == -1) {
+ newIndex = owner.items.items.length;
+ owner.add(newCard);
+ }
+
+ // Is this a valid, different card?
+ if (newCard && oldCard != newCard) {
+ // If the card has not been rendered yet, now is the time to do so.
+ if (!newCard.rendered) {
+ me.renderItem(newCard, me.getRenderTarget(), owner.items.length);
+ me.configureItem(newCard, 0);
+ }
+
+ me.activeItem = newCard;
+
+ // Fire the beforeactivate and beforedeactivate events on the cards
+ if (newCard.fireEvent('beforeactivate', newCard, oldCard) === false) {
+ me.layoutBusy = false;
+ return false;
+ }
+ if (oldCard && oldCard.fireEvent('beforedeactivate', oldCard, newCard) === false) {
+ me.layoutBusy = false;
+ return false;
+ }
+
+ // If the card hasnt been sized yet, do it now
+ if (!me.sizeAllCards) {
+ me.setItemBox(newCard, me.getTargetBox());
+ }
+ else {
+ // onLayout calls setItemBox
+ me.onLayout();
+ }
+
+ if (oldCard) {
+ if (me.hideInactive) {
+ oldCard.hide();
+ }
+ oldCard.fireEvent('deactivate', oldCard, newCard);
+ }
+
+ // Make sure the new card is shown
+ if (newCard.hidden) {
+ newCard.show();
+ }
+
+ newCard.fireEvent('activate', newCard, oldCard);
+
+ me.layoutBusy = false;
+
+ if (!me.sizeAllCards) {
+ if (!owner.componentLayout.layoutBusy) {
+ me.onLayout();
+ }
+ }
+ return newCard;
+ }
+
+ me.layoutBusy = false;
+ return false;
+ }
+});</pre></pre></body></html>
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