1. #1
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    Default Unanswered: How to notify a view that a store has been refreshed ?

    Unanswered: How to notify a view that a store has been refreshed ?


    I am trying to make a store to notify a view whenever it's been refreshed. (For various reasons I would prefer not to use a DataView.) I thought I could do it like this:

    In the store I declare a custom event myEvent and have the refresh handler fire it on the app to make it global:

    Code:
    Ext.define('MyApp.store.MyStore', {
        extend: 'Ext.data.Store',
    
        config: {
          ...
            listeners: [
                {
                    fn: 'onDirectstoreRefresh',
                    event: 'refresh'
                },
                {
                    fn: 'onDirectstoreMyEvent,
                    event: 'myEvent'
                }
            ]
        },
    
    
        onDirectstoreRefresh: function(store, data, eOpts) {
                MyApp.app.fireEvent('myEvent', this, 0);
        },
    
        onDirectstoreMyEvent: function(eventOptions) {
                console.log('MyEvent received in MyStore');  // This bit works
        }
    });
    and then have the view listen for myEvent:

    Code:
    Ext.define('MyApp.view.root', {
        extend: 'Ext.Container',
    
        config: {
    ...
            listeners: [
    
                {
                    fn: 'onContainerMyEvent',
                    event: 'myEvent'
                }
            ]
        },
    
     
        onContainerMyEvent: function(container) {
            console.log('MyEvent received in view'); // This never happens
        }
    
    });
    myEvent is received inside the store but it never gets to the view. What have I missed out ?

    Thanks in advance.

  2. #2
    Sencha - Senior Forum Manager mitchellsimoens's Avatar
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    Default


    In the view, you should add listeners to the store
    Mitchell Simoens @SenchaMitch
    Sencha Inc, Senior Forum Manager
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  3. #3
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    Default


    @Mitchell, Thanks for suggesting the preferred pattern. Is there a material difference between using the view's listeners config vs. using this.on('myEvent',doSomething) in an overridden constructor?

  4. #4
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    Default


    Thanks, this is working now.

    In MyView I put
    Code:
            listeners: [
                {
                    fn: 'onContainerInitialize',
                    event: 'initialize'
                }
            ]

    and

    Code:
        onContainerInitialize: function(component, options) {
            this.store = Ext.data.StoreManager.lookup('MyStore');
            this.store.addListener('refresh', this.onMyStoreRefresh, this, {order: 'after'} );
            this.store.fireEvent('refresh');
        }
    and
    Code:
        onMyStoreRefresh: function(component) {
         console.log(store refreshed');
    ...
        }
    I'm not trying to use a global event anymore.

  5. #5
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    haduki will become famous soon enough haduki will become famous soon enough

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    Default


    In your op, you wrote
    Code:
    MyApp.app.fireEvent('myEvent', this, 0)
    'MyApp.app' is the instance of 'Application',not your 'view'.
    This is the reason why 'This never happens'.
    Add listener to your application object or fire event by your view is the correct way.
    I write English by translator.

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