ExtJS 4 TreePanel autoload

I have an Ext.tree.Panel which is has a TreeStore. This tree is in a tab. The problem is that when my application loads all of the trees used in the application load their data, even though the store is on autoLoad: false.

How could I prevent autoloading on the tree?

Ext.define('...', {
    extend: 'Ext.container.Container',
    alias: 'widget.listcontainer',
    layout: {
        type: 'vbox',
        align: 'stretch'
    },
    items: [{
        xtype: 'container',
        html: "...",
        border: 0
    }, {
        xtype: '...',
        flex: 1,
        bodyPadding: 5,
        margin: '9 0 0 0'
    }]
});

Ext.define('...', {
    extend: 'Ext.data.TreeStore',
    model: '...',
    proxy: {
        type: 'ajax',
        reader: {
            type: 'json',
            root: 'data'
        },
        api: {
            read: 'some url'
        }
    }
});

Ext.define('...', {
    extend: 'Ext.tree.Panel',
    alias: 'widget....',
    id: '...',
    title: '...',

    height: 400,
    collapsible: true,
    useArrows: true,
    rootVisible: false,
    multiSelect: true,
    singleExpand: true,
    autoScroll: true,
    store: '...',

    columns: [...]
});

P.S. I've found out if I change rootVisible to true on the tree this problem doesn't happen, but then it shows to root node(which I don't want).

If root is invisible then AJAX tree will automatically load first level of hierarchy (as you already proved by yourself).

I think the best way is to make root visible or create tree after some actions. I wrote code that prevent AJAX request that loads data:

var preventTreeLoad = true;

store.on('beforeexpand', function(node) {
    if (node == this.getRootNode() && preventTreeLoad) {
        Ext.Ajax.abort(this.proxy.activeRequest);
        delete this.proxy.activeRequest;
    }
}, store);

var b = Ext.create('Ext.Button', {
    text: 'Click me',
    renderTo: 'btn',
});

b.on('click', function() {
    preventTreeLoad = false;
    this.load();
}, store);

But I'm not recommended to use this approach. For example, if javascript wasn't so fast - Ajax request may be send (response will not be read but server will execute operation).

How to stop TreeStore autoload?, This works only if for 'Ext.tree.Panel' 'rootVisible: false'. The problem is that I need it with invisible root, but when it's set to invisible then the� Ext JS 4.2.1 API Documentation from Sencha. Class documentation, Guides and Videos on how to create Javascript applications with Ext JS 4

I hit the same problem, and to avoid an implicit request, I specified a root inline in the TreeStore's configuration, like:

Ext.create('Ext.data.TreeStore', {
    model: '...',
    proxy: {
        type: 'ajax',
        reader: {
            type: 'json',
            root: 'data'
    },
    api: {
        read : 'some url'
    }
    folderSort: true,
    rootVisible: false,
    root: {expanded: true, text: "", "data": []} // <- Inline root
});

After an explicit .load the inline root is overwritten.

Ext.data.TreeStore - Ext JS 4.2.4, If data is not specified, and if autoLoad is true or an Object, this store's load method is automatically called afte In version 4.0.7 the autoload property of a store defaults to false however in 4.1 and later it is undefined which appears to be treated by ExtJS as true. When editing code manually this is not a problem because the property can be set explicitly.

You can put a dummy proxy in place when defining the tree, then set the real proxy when you want to begin using the tree/store. For example:

var store = Ext.define('Ext.data.TreeStore', {
   ...
   // dummy proxy to avoid autoLoad on tree store construction
   proxy: {
      type: 'ajax',
      url: ''
   },
   ...
);

Then, when you want to use it for the first time,

store.setProxy({
   type: 'ajax',
   url: 'http://some/real/url',
   ...
});
store.load();

Loading ExtJS TreeStore from JSON, So, to solve this issue, first of all, when you're calling the load method of the array of children since it looks like the tree store does that for you. I've been banging my head around this for about 12 hours now and am not getting anywhere. I'd really appreciate some help or direction. I can't get a visualforce page to render a sense ExtJS tree panel with data from JSON. I'm using ExtJS 4.2.1. I have a salesforce apex class that generates a JSON string like the one below: {"children":

You can solve it with a small override:

Ext.override(Ext.tree.View,  
{ 
    setRootNode: function(node)
    {
        var me = this;        
        me.store.setNode(node);
        me.node = node;
        if (!me.rootVisible && me.store.autoLoad)
        {
            node.expand();
        }
    }
}); 

afterlayout you need a load()

Extjs 4.2.1 - config autoLoad: falsa falla, Tiene que anular el Ext.tree.Panel.setRootNode para tener en cuenta la propiedad autoLoad de la tienda. El siguiente ejemplo se prueba con ExtJS v4. 2.2. * It is important to note that if the root node is {@link Ext.tree.Panel#rootVisible hidden}, its type will default to the store's model type, and if left * as the default (`{@link Ext.data.TreeModel}`) this will have no knowledge of creation of special child node types.

Adding to what XenoN said (though many years later when I hit the same issue) If the expanded property is set to true in the store definition, it will auto load even if autoLoad is set to false. this is unique to a TreeStore.

However, if we do want the store to load and expand we need to Set expanded = true sometimes in code after creation (when we want) this also fires the loading of the previously created store.

setting store.setRoot({expanded:true}); within the consumer of the store which is Ext.tree.Panel. This will load the store when you want it to load it.

seems like after that, store.load() is redundant since the expanded = true makes the store's proxy to load up and go to the server. weird, I know.

Add extra parameters with an ExtJS TreeStore server request., The Sencha Ext JS TreePanel is a popular component, but somewhat hard for for example as the result of an afterrender event on the tree where you load the� Ext JS 3.4.1 API Documentation. Ext JS 3.4.0 Sencha Docs

Ext.tree.TreePanel, Returns the container element for this TreePanel Checks to see if this object has any listeners for a specified event load : ( Node node ), TreePanel. On the following example, both TreePanel and TreeStore AutoLoad property are set to false, but it loads the data as it was set to true. I took a look on breaking changes and i was not able to find anything related to this. I noticed that AutoLoad property was added to TreePanel and in the following example both properties are set to false.

Extjs 4 treepanel Reload and Expand - extjs - iOS, Extjs 4 treepanel Reload and Expand - extjs. I'm using Extjs4 treepanel with Json data. getLoader().load(tree_panel.root); //Expand tree node tree_panel. Uncategorized (4) Web (107) Ajax (19) Ajax/Ext-JS (29) Ajax/Prototype (10) Ajax/Prototype-UI (4) Android Studio (1) Browser/IE (3) Cordova (1) CSS (4) ExtJs 4 (30) ExtJs 5 (9) ExtJs 6 (3) Flotr (1) Highcharts (29) Highmaps (2) Highstock (4) jQuery (1) jQuery Mobile (3) PhantomJs (3) Sencha Architect (1) Sencha Touch 2 (3) Syntax Highlighter 2.0

ExtJs 4 reload node in Tree Panel and , In ExtJs 4 Tree Panel a node is basically the Model record that is associated with a reload or use a TreeStore override for the load function as shown below The TreePanel Ext.tree.Panel provides tree-structured UI representation of tree-structured data. A TreePanel must be bound to a Ext.data.TreeStore. The TreeStore is a store implementation that is backed by by an Ext.data.Tree. It provides convenience methods for loading nodes, as well as the ability to use the hierarchical tree structure

Comments
  • And what you want to see in treepanel if it is not autoload and root is not visible too? I think you must add the code where you create store. You want AJAX loadable tree or something else?
  • Well I will of course do a tree.store.load() when the time comes, but I don't want load to happen for every tree I use when the application loads.
  • Nevertheless, add code for your store.
  • I added write to file in php code that returns tree structure and make sure that request wasn't sended at all. But nevertheless this approach is not good.
  • I don't understand why this was down voted. Of all the solutions in here, this one is the most flexible and with the least amount of hacking. Just define an empty expanded root with no children initially, and then you can load the store whenever you want. Even works with invisible root. Works great! +1