Develop Reference

ExtJS tree dynamically load

i create a ExtJS tree by loading data dynamically, the js code is below
var treeModel = Ext.define("TreeModel", {
extend : "Ext.data.Model",
fields : [{id: "id", type : "string"},
{name : "text", type : "string"},
{name : "leaf", type : "boolean"}]
});
var store = new Ext.data.TreeStore({
model: 'treeModel',
proxy: {
type: 'ajax',
url: 'listtreecontent.action'
},
root: {
expanded: true
},
reader: {
type: 'JSON',
root: 'array'
},
autoLoad:true
});
var treePanel = new Ext.tree.TreePanel({
title: 'Data management',
width: 500,
height: 300,
renderTo: Ext.getBody(),
useArrows: true,
rootVisible: false,
store: store
});
but it does not show the tree
i can get the response data,
response data
when i write the response data into a json file, and let the url = jsonfile address, it can show the tree, i do not know why?

maybe in the struts2, we should set a param for the action
<action name="listtreecontent" class="org.easygeoc.account.ListTreeContent" method="returnTreeNodes">
<result type="json">
<param name="root">array</param>
<param name="root">js</param>
</result>
</action>

How to load extjs 4 grid data on form submission?

I am new to ExtJS.
I am developing a page which has a form at the top and a grid below. When user enters the search criteria in the form and enters Submit, grid has to be populated with data accordingly.
I have managed to get the JSON data from server to the client
console.log('response.responseText');
prints the data correctly, but unable to assign that to the grid.
Here is my code
Ext.define('colModel', {
extend: 'Ext.data.ColumnModel',
fields: [
'personId',
'country',
'idType',
'idValue'
]
});
// create the data store
var store = Ext.create('Ext.data.ArrayStore', {
model: 'colModel',
fields: [
{name: 'personId'},
{name: 'country'},
{name: 'idType'},
{name: 'idValue'}
],
proxy: {
type: 'ajax',
reader: {
type: 'json',
root: 'person'
}
},
autoLoad: false,
});
// create the Grid
var grid = Ext.create('Ext.grid.Panel', {
store: store,
stateful: true,
id: 'myGrid',
stateId: 'stateGrid',
columns: [
{
text : 'Person Id',
flex : 1,
sortable : false,
dataIndex: 'personId'
},
{
text : 'Country',
width : 75,
sortable : true,
dataIndex: 'country'
},
{
text : 'ID Type',
width : 75,
sortable : true,
dataIndex: 'idType'
},
{
text : 'Id Value',
width : 75,
sortable : true,
dataIndex: 'idValue'
},
],
height: 350,
title: 'Array Grid',
renderTo: 'bottom',
viewConfig: {
stripeRows: true,
ForceFit: true,
loadMask:false
}
});
and this function get invoked after form submission and response returned from server
displayGrid : function(response, opts) {
//Received response from the server
console.log('On Success');
responseData = Ext.decode(response.responseText);
console.log('response success ',responseData);
console.log(Ext.getCmp('myGrid').getStore());
grid.getStore().loadData('colModel',false);
}
I have managed to populate grid data on page load using the following code
var store = Ext.create('Ext.data.ArrayStore', {
model: 'colModel',
proxy: {
type: 'rest',
url : 'PersonSearch',
reader: {
type: 'json',
root: 'person'
}
},
autoLoad: true
});
but failed to load grid data on form submission.
Please help. Thanks in advance.
PS: I am using ExtJS 4.2
Update
This is the JSON update, I am getting from the server(caught using Firefox Browser Console)
"{"person":[{"personId":"1","country":"country 1","idType":"idType 1","idValue":"idValue 1"},{"personId":"2","country":"country 2","idType":"idType 2","idValue":"idValue 2"},{"personId":"3","country":"country 3","idType":"idType 3","idValue":"idValue 3"},{"personId":"4","country":"country 4","idType":"idType 4","idValue":"idValue 4"},{"personId":"5","country":"country 5","idType":"idType 5","idValue":"idValue 5"}]}
"

You aren't actually loading the data. Your data is stored in responseData, so your loadData call should load that data into the store. So, your loadData call should be as follows:
grid.getStore().loadData(responseData);
Note that this assumes that your responseData is in the correct format for the store you are loading it into. (Also note that the second parameter is false by default, so it isn't necessary to include it in this case)

Used forgivenson comment and set autoLoad: true
and
Updated the displayGrid method as below
displayGrid : function(response, opts) {
//Received response from the server
console.log('On Success');
responseData = Ext.decode(response.responseText,false);
console.log(response.responseText);
grid.getStore().loadData(responseData.person);
}
and the grid gets populated correctly.

can't load json data into a grid extjs

I tryed every answer i found (in Stackoverflow there are many) to solve my problem with the store of extjs, but still the data doesn't get displayed in the grid, even if the grid is correctly fisplayed. I'm confused so I'm writing the "store" I was able to build reading the answer on this site. I don't know why it's not loading the data into the grid. If you need more information to help please ask.
store: Ext.create('Ext.data.Store', {
autoLoad: true,
storeId: 'StoreName',
fields: ['id','name'],
data : JsonObject,
model: 'ModelName',
proxy: {
type: 'memory',
reader: {
type: 'json',
record: 'JsonRoot'
}
}
})
The grid is loaded in a new window through an ajax call. The code of the new window is the following:
Ext.create('Ext.window.Window', {
title: 'GridTitle',
height: 200,
width: 400,
layout: 'fit',
items: {
xtype: 'grid',
border: false,
columns: [
{
text : 'id',
flex : 1,
sortable : true,
dataIndex: 'id'
},
{
text : 'name',
width : 300,
sortable : true,
dataIndex: 'name'
}],
I do have the impression that the part with the columns is not read by ext.js, cause it doesn't index the name and id of the data i'm passing to it in the json.

The solution was so simple that I'm embarrassed to say it.
reader: {
type: 'json',
root: 'jsonRoot'
}
Instead of:
reader: {
type: 'json',
record: 'jsonRoot'
}

Populate ExtJS combobox with JSON

I am using ExtJS (3) and just trying to populate a combobox/drop down using records from the database that are being queried using JSON.
Here is my JSON call:
var projectDropDown = new Ext.data.Store({
autoLoad: true,
url: 'dropdown.json',
storeId: 'projectDropDown',
idProperty: 'ProjectID',
fields: [ 'ProjectID', 'ProjectName' ]
});
And then my combobox code:
{
xtype: 'combo',
id: 'ProjectName',
fieldLabel: 'Project Name',
valueField: 'ProjectID',
displayField: 'ProjectName',
store: projectDropDown,
typeAhead: true,
mode: 'local',
triggerAction: 'all',
emptyText:'Select a Project...',
selectOnFocus:true
}
The JSON is returning my data like this:
[
{
"ProjectID":"1",
"ProjectName":"Mike's Test Project"
},
{
"ProjectID":"2",
"ProjectName":"My Second Test Project"
},
{
"ProjectID":"3",
"ProjectName":"My Third Project"
},
{
"ProjectID":"6",
"ProjectName":"More testing from me"
}
]
I think I am close, I just don't see what I am missing to make the connection.
Thanks for any assistance.

The first step I would do would be to output the store (or size of the store or something) to the console to see if the data is getting loaded properly into the store.
My guess would be that you need to enclose your JSON that is returned into some root object. Try giving your store a JSONReader with a root element specified like so:
var projectDropDown = new Ext.data.Store({
autoLoad: true,
url: 'dropdown.json',
storeId: 'projectDropDown',
reader: new Ext.data.JsonReader(
{
root: 'projects'
}),
idProperty: 'ProjectID',
fields: [ 'ProjectID', 'ProjectName' ]
});
Then change the JSON returned to look like this instead
{
"projects" : [
{"ProjectID":"1","ProjectName":"Mike's Test Project"},
{"ProjectID":"2","ProjectName":"My Second Test Project"},
....
]
}

How to load XML into a list using Sencha/Phonegap?

I'm trying to setup a native style app using sencha touch and phonegap. I'm trying to pull in data from an external XML feed into the model.
In my model (Event.js) I have this:
Ext.regModel('Event', {
fields: [
{name: 'title', type: 'string'}
]
});
In my store (eventsstore.js):
ToolbarDemo.eventstore = new Ext.data.Store({
model: 'Event',
sorters: 'title',
getGroupString : function(record) {
return record.get('title')[0];
},
proxy: {
type: 'ajax',
url: 'http://the-url-to-the-file.xml',
reader: {
type: 'xml',
root: 'events',
record: 'event'
}
},
autoLoad: true
});
And in the view (tried as a list):
ToolbarDemo.views.Eventscard = Ext.extend(Ext.List, {
title: "Events",
iconCls: "search",
store: ToolbarDemo.eventstore,
itemTpl: '{title}',
grouped: true,
indexBar: true,
cardSwitchAnimation: 'slide'
});
Ext.reg('eventscard', ToolbarDemo.views.Eventscard);
And tried as a panel:
ToolbarDemo.views.Eventscard = Ext.extend(Ext.Panel, {
title: "Events",
iconCls: "search",
dockedItems: [{
xtype: 'toolbar',
title: 'Events'
}],
layout: 'fit',
items: [{
xtype: 'list',
store: ToolbarDemo.eventstore,
itemTpl: '{title}',
grouped: true
}],
//This was an experiment, safe to leave out?
initComponent: function() {
//ToolbarDemo.eventstore.load();
ToolbarDemo.views.Eventscard.superclass.initComponent.apply(this, arguments);
}
});
Ext.reg('eventscard', ToolbarDemo.views.Eventscard);
Now when I navigate to that card view, the loading overlay/spinner is displayed but that's as far as it goes, the list of items does not appear. Any ideas of what I'm doing wrong?

I am not that much familier with this, I have used like this to display a list.. try this
ToolbarDemo.eventstore.load();
var itemTpl = new Ext.XTemplate('<div id='title'>{title}</div>');
this.eventStoreList = new Ext.List({
id: 'eventStoreList',
store: ToolbarDemo.eventstore,
itemTpl: itemTpl,
height: 370,
indexBar: false
});
this.eventStoreListContainer = new Ext.Container( {
id : 'eventStoreListContainer',
items : [this.eventStoreList]
});
this.items = [this.eventStoreListContainer];
ToolbarDemo.views.Eventscard.superclass.initComponent.apply(this);

Well, I got it working!
I added ToolbarDemo.eventstore.read(); to the end of my store code, saved the XML file locally in the root 'www' folder then using the list method worked fine!
Does any body know why this (calling a remote XML) could be a problem?
EDIT: Turns out that it works fine in the browser like that, but not the iPhone simulator. So now I've set it back to the remote URL and added the URLs to the PhoneGap Whitelist and it works great :)