A basic tab container. TabPanels can be used exactly like a standard Ext.panel.Panel for
layout purposes, but also have special support for containing child Components
(items) that are managed using a
CardLayout layout manager, and displayed as separate tabs.
Note: By default, a tab's close tool destroys the child tab Component and all its descendants.
This makes the child tab Component, and all its descendants unusable. To enable re-use of a tab,
configure the TabPanel with autoDestroy: false.
TabPanel's layout
TabPanels use a Dock layout to position the TabBar at the top of the widget.
Panels added to the TabPanel will have their header hidden by default because the Tab will
automatically take the Panel's configured title and icon.
TabPanels use their header or footer
element (depending on the tabPosition configuration) to accommodate the tab selector buttons.
This means that a TabPanel will not display any configured title, and will not display any configured
header tools.
To display a header, embed the TabPanel in a Panel which uses
layout: 'fit'.
Controlling tabs
Configuration options for the Ext.tab.Tab that represents the component can be passed in
by specifying the tabConfig option:
Ext.create('Ext.tab.Panel', {
width: 400,
height: 400,
renderTo: document.body,
items: [{
title: 'Foo'
}, {
title: 'Bar',
tabConfig: {
title: 'Custom Title',
tooltip: 'A button tooltip'
}
}]
});
Vetoing Changes
User interaction when changing the tabs can be vetoed by listening to the beforetabchange event.
By returning false, the tab change will not occur.
Ext.create('Ext.tab.Panel', {
renderTo: Ext.getBody(),
width: 200,
height: 200,
listeners: {
beforetabchange: function(tabs, newTab, oldTab) {
return newTab.title != 'P2';
}
},
items: [{
title: 'P1'
}, {
title: 'P2'
}, {
title: 'P3'
}]
});
Examples
Here is a basic TabPanel rendered to the body. This also shows the useful configuration activeTab,
which allows you to set the active tab on render. If you do not set an activeTab, no tabs will be
active by default.
Ext.create('Ext.tab.Panel', {
width: 300,
height: 200,
activeTab: 0,
items: [
{
title: 'Tab 1',
bodyPadding: 10,
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
It is easy to control the visibility of items in the tab bar. Specify hidden: true to have the
tab button hidden initially. Items can be subsequently hidden and show by accessing the
tab property on the child item.
var tabs = Ext.create('Ext.tab.Panel', {
width: 400,
height: 400,
renderTo: document.body,
items: [{
title: 'Home',
html: 'Home',
itemId: 'home'
}, {
title: 'Users',
html: 'Users',
itemId: 'users',
hidden: true
}, {
title: 'Tickets',
html: 'Tickets',
itemId: 'tickets'
}]
});
setTimeout(function(){
tabs.child('#home').tab.hide();
var users = tabs.child('#users');
users.tab.show();
tabs.setActiveTab(users);
}, 1000);
You can remove the background of the TabBar by setting the plain property to true.
Ext.create('Ext.tab.Panel', {
width: 300,
height: 200,
activeTab: 0,
plain: true,
items: [
{
title: 'Tab 1',
bodyPadding: 10,
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
Another useful configuration of TabPanel is tabPosition. This allows you to change the
position where the tabs are displayed. The available options for this are 'top' (default) and
'bottom'.
Ext.create('Ext.tab.Panel', {
width: 300,
height: 200,
activeTab: 0,
bodyPadding: 10,
tabPosition: 'bottom',
items: [
{
title: 'Tab 1',
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
The setActiveTab is a very useful method in TabPanel which will allow you to change the
current active tab. You can either give it an index or an instance of a tab. For example:
var tabs = Ext.create('Ext.tab.Panel', {
items: [
{
id : 'my-tab',
title: 'Tab 1',
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
var tab = Ext.getCmp('my-tab');
Ext.create('Ext.button.Button', {
renderTo: Ext.getBody(),
text : 'Select the first tab',
scope : this,
handler : function() {
tabs.setActiveTab(tab);
}
});
Ext.create('Ext.button.Button', {
text : 'Select the second tab',
scope : this,
handler : function() {
tabs.setActiveTab(1);
},
renderTo : Ext.getBody()
});
The getActiveTab is a another useful method in TabPanel which will return the current active tab.
var tabs = Ext.create('Ext.tab.Panel', {
items: [
{
title: 'Tab 1',
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
Ext.create('Ext.button.Button', {
text : 'Get active tab',
scope : this,
handler : function() {
var tab = tabs.getActiveTab();
alert('Current tab: ' + tab.title);
},
renderTo : Ext.getBody()
});
Adding a new tab is very simple with a TabPanel. You simple call the add method with an config
object for a panel.
var tabs = Ext.create('Ext.tab.Panel', {
items: [
{
title: 'Tab 1',
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
Ext.create('Ext.button.Button', {
text : 'New tab',
scope : this,
handler : function() {
var tab = tabs.add({
// we use the tabs.items property to get the length of current items/tabs
title: 'Tab ' + (tabs.items.length + 1),
html : 'Another one'
});
tabs.setActiveTab(tab);
},
renderTo : Ext.getBody()
});
Additionally, removing a tab is very also simple with a TabPanel. You simple call the remove method
with an config object for a panel.
var tabs = Ext.create('Ext.tab.Panel', {
items: [
{
title: 'Tab 1',
html : 'A simple tab'
},
{
id : 'remove-this-tab',
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});
Ext.create('Ext.button.Button', {
text : 'Remove tab',
scope : this,
handler : function() {
var tab = Ext.getCmp('remove-this-tab');
tabs.remove(tab);
},
renderTo : Ext.getBody()
});
Available since: 1.1.0
Sencha Touch & Architect training »