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Thread: Viewport with template in header

  1. #1
    Ext JS Premium Member Spenna's Avatar
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    Default Answered: Viewport with template in header

    Hi.

    I'm new to ExtJS 4, and are wondering whats the correct way to bind data to a 'header' using the MVC pattern.
    Basically i have a Viewport defined in app.js
    Code:
    Ext.create('Ext.container.Viewport', {
                layout: 'border',
                items: [{
                    xtype: 'header'
                },{
                    xtype: 'dashboard'
                }]
            });
    And the app/view/Header.js looks like this:
    Code:
    Ext.define('SF6.view.Header', {
        extend: 'Ext.Component',
        region: 'north',
        alias : 'widget.header',
        tpl: Ext.create('Ext.Template', '<div class="x-panel-header" style="border-bottom: 1px solid #CCC;background-color:#FFF">'
                +    '<h1 style="float:left;">Application Title</h1>'
                +    '<tpl if="authenticated">'
                +    '<span style="float:right; font-size:11px;">Logged in as <b>{username}</b> ({role}) | {company} | <a href="#">Log out</a></span><br>'
                +    '</tpl>'
                +'</div>'),
        initComponent: function() {
            this.callParent(arguments);
        }
    When user is not authenticated i bring up a modal login-window which is controlled by my users controller.

    2011-11-01_0938.jpg
    http://screencast.com/t/qnwUjDdh

    My question is what is the correct way to store current user in the 'Application' and how to apply the current users value to the header?

  2. I assign the tpl to a container and then use the update method and pass in an Object which is the user details.

  3. #2
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    Default

    Quote Originally Posted by Spenna View Post
    My question is what is the correct way to store current user in the 'Application' and how to apply the current users value to the header?
    This is really up to you... my favorite way is to save it on the app namespace.

    Code:
    app.user = {...};
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
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    Check out my GitHub, lots of nice things for Ext JS and Sencha Touch
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  4. #3
    Ext JS Premium Member Spenna's Avatar
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    Default

    Cool, this is what i've ended up doing. How about the view in header? Whats the 'ext4' way of updating a part of the view when user is logged in?

  5. #4
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    Default

    I assign the tpl to a container and then use the update method and pass in an Object which is the user details.
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
    ________________
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    Check out my GitHub, lots of nice things for Ext JS and Sencha Touch
    https://github.com/mitchellsimoens

  6. #5
    Ext JS Premium Member Spenna's Avatar
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    Default

    I've got another question regarding this - once logged in, template is rendered ok - but how do i capture click on the 'log out' link? (Its part of the original template)

    I would prefer to have definition of it in my 'Users' controller am unsure of how to achive it. Something like this:
    Code:
    Ext.define('SF6.controller.Users', {
        extend: 'Ext.app.Controller',
        init: function() {
            this.control({
                'header a': {
                    click: this.logout
                }
            })
        },
        ......
        logout: function () {
            Ext.Ajax.request({
                url: '/users/logout',
                success: function (response) {
                    var view = Ext.widget('userlogin'); // brings up login window
                }
            });
        }
    );

  7. #6
    Sencha - Sr Software Engineer mitchellsimoens's Avatar
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    Default

    ComponentQuery cannot listen for DOM elements.

    You have to do something like this after a component has rendered:

    Code:
    cmp.mon(cmp.el, {
        scope : this,
        delegate : 'a',
        click : function() {...}
    });
    Mitchell Simoens @LikelyMitch
    Sencha Inc, Senior Software Engineer
    ________________
    Learn BBCode and use it! Checkout the CODE tag!

    Check out my GitHub, lots of nice things for Ext JS and Sencha Touch
    https://github.com/mitchellsimoens

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