Constant button linking to a page throughout the app - sencha-touch

Question

I have a button at the top right of every page that I want to link to a certain page within my application. Is there a way to give each instance of this button the same behaviour? and if so where would the code sit so that it affects every page? Many thanks in advance.
View:
items: [
{
title: '<span class="logo"></span>',
xtype: 'titlebar',
docked: 'top',
items: [
{
xtype: 'button',
align: 'right',
iconAlign: 'right',
id: 'buytickets',
text: 'Buy Tickets'
}
]
}
]
Controller (specific to one page):
config: {
refs: {
main: 'ListNav'
},
control: {
"button#buytickets": {
tap: 'buytickets'
}
}
},
buytickets: function(button, e, eOpts) {
this.getMain().push({
xtype: 'buyticketspanel'
});
},

Answer 1

You could just put the button at the top of your Viewport, in the app.js file:
Ext.application({
name: 'MyApp',
requires: [],
views: [/*Views*/],
controllers: [/*Controllers*/],
viewport: {
layout: 'vbox'
},
launch: function() {
var me = this;
// Destroy the #appLoadingIndicator element
Ext.fly('appLoadingIndicator').destroy();
// Initialize the main view
Ext.Viewport.add([
{
title: '<span class="logo"/>',
xtype: 'titlebar',
docked: 'top',
items: [
{
xtype: 'button',
align: 'right',
iconAlign: 'right',
id: 'buytickets',
text: 'Buy Tickets',
handler: me.doBuyTickets
}
]
},
Ext.create('MyApp.view.Main', {flex: 1})
]);
},
doBuyTickets: function() {
//do stuff
}
});
****EDIT****:
However, you won't be able to re-purpose that bar as the title bar for a NestedView. If you need to have that, then you might be best served with a utils file that has a method to add a button to a toolbar, and just reuse that in the init function of any NestedView components.
Utils.js:
Ext.define("MyApp.util.Utils", {
singleton: true,
addBuyButton: function(toolbar)
{
toolbar.add({
text: 'Buy Tickets',
align: 'right',
handler: function() {
//do stuff
}
});
}
});
Controller:
Ext.define('MyApp.controller.MyController', {
extend: 'Ext.app.Controller',
config: {
refs: {
nestedList: 'nestedlist'
},
control: {
app-page: {
initialize: 'initAppPage'
}
}
},
initAppPage: function()
{
MyApp.utils.addBuyButton(this.getNestedList().getNavigationBar());
}
});