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I am using sencha touch 2 and not getting help inside sencha forum, so I hope you guys can help me.
I want to create a list with custom items. In this custom item i want to have a horizontal scrollable listview with buttons as items.
I tried to do it component.DataItem but it does no work for me.
I tried also to add an custom xtype als an item in a list, but this does not work.
I think this is a simple task but sencha touch makes it a challenge for me.
So please help me and show me, how can I get a view like shown in this picture.
Instead of a standard list you are going to want to use Component DataView. Essentially, you are going to need to first define an Ext.dataview.component.DataItem, which is then implemented into the DataView. Below is a simple example of a buttons in a DataView as referenced from the DataView guide: http://docs.sencha.com/touch/2-0/#!/guide/dataview
First create the DataItem:
Ext.define('MyApp.view.DataItemButton', {
extend: 'Ext.dataview.component.DataItem',
requires: ['Ext.Button'],
xtype: 'dataitembutton',
config: {
nameButton: true,
dataMap: {
getNameButton: {
setText: 'name'
}
}
},
applyNameButton: function(config) {
return Ext.factory(config, Ext.Button, this.getNameButton());
},
updateNameButton: function(newNameButton, oldNameButton) {
if (oldNameButton) {
this.remove(oldNameButton);
}
if (newNameButton) {
this.add(newNameButton);
}
}
});
We must extend Ext.dataview.component.DataItem for each item. This is an abstract class which handles the record handling for each item.
Below the extend we require Ext.Button. This is simply because we are going to insert a button inside our item component.
We then specify the xtype for this item component.
Inside our config block we define nameButton. This is a custom configuration we add to this component which will be transformed into a button by the class system. We set it to true by default, but this could also be a configuration block. This configuration will automatically generate getters and setters for our nameButton.
Next we define the dataMap. The dataMap is a map between the data of a record and this view. The getNameButton is the getter for the instance you want to update; so in this case we want to get the nameButton configuration of this component. Then inside that block we give it the setter for that instance; in this case being setText and give it the field of the record we are passing. So, once this item component gets a record it will get the nameButton and then call setText with the name value of the record.
Then we define the apply method for our nameButton. The apply method uses Ext.factory to transform the configuration passed into an instance of Ext.Button. That instance is then returned, which will then cause updateNameButton to be called. The updateNameButton method simply removes the old nameButton instance if it exists, and adds the new nameButton instance if it exists.
Now create the DataView:
Ext.create('Ext.DataView', {
fullscreen: true,
store: {
fields: ['name', 'age'],
data: [
{name: 'Jamie Avins', age: 100},
{name: 'Rob Dougan', age: 21},
{name: 'Tommy Maintz', age: 24},
{name: 'Jacky Nguyen', age: 24},
{name: 'Ed Spencer', age: 26}
]
},
useComponents: true,
defaultType: 'dataitembutton'
});
In your case, rather than using a button for the DataItem, you'll want to use a horizontal scrolling list. Here is an example that I found from this answer: Horizontal scrolling list
var list = Ext.create('Ext.DataView',{
store: store,
itemTpl: new Ext.XTemplate('<img src="{icon}" />'),
inline: { wrap: false },
scrollable: {
direction: 'horizontal',
directionLock: true
}
});
Note that you will probably have to use components in the second dataview as well in order to achieve your buttons with image
I am using ExtJs4.I have a form in my web application in which there is text box.The scenario is to provide an AJAX like search(like Google) when any key is pressed in the text box.Search will look into a web service and display the result(JSON object) in drop drown.Similar to Google search.
Is there any idea,link or tutorial for doing this?
Thanks
You could use ComboBox for this. With trigger or without one (that looks like a TextBox).
Sencha provides good examples:
http://docs.sencha.com/ext-js/4-0/#!/example/form/combos.html
http://docs.sencha.com/ext-js/4-0/#!/example/form/forum-search.html
This is a simple example:
{
xtype: 'combo',
id: 'myCombo',
store: Ext.create('Ext.data.ArrayStore', {
model: Ext.define('ComboModel', {
extend: 'Ext.data.Model',
fields: ['id','data1','data2']
}),
proxy: {
type: 'ajax',
url : 'data.json',
reader: {
type: 'array'
}
}
}),
triggerAction: 'query',
minChars: 2,
fieldLabel: 'Search',
displayField: 'data1',
msgTarget: 'side',
triggerCls : 'x-form-search-trigger', // Search Icon For Instance
listConfig: {
getInnerTpl: function() {
return '<div>{data1}</div><div>{data2}</div>';
}
}
}
And JSON file:
[
['1','data1-1','data2-1'],
['2','data1-2','data2-2'],
['3','data1-3','data2-3'],
['4','data1-4','data2-4'],
['5','data1-5','data2-5']
]
Try this example: http://docs.sencha.com/ext-js/4-0/#!/example/form/forum-search.html
I think this example http://docs.sencha.com/ext-js/4-1/#!/example/form/forum-search.html will be interesting for you. This realization use standard combobox control. In your case you need to set minChars property = 1, in this case store binded to Combobox will generate standard READ query with filter param to server. You can generate results there.
I have an itemselecor inside a grid, and i have an combobox that should reload only the store inside the itemselector( the value fields should remain intact)
Here is the itemselector
var grid = Ext.widget('form', {
id: 'grid',
title: '',
width: 600,
bodyPadding: 10,
renderTo: 'itemselectorproduto',
items: [{
xtype: 'itemselector',
name: 'itemselector',
id: 'itemsel',
anchor: '100%',
imagePath: '/ux/images/',
store: store,
displayField: 'Nome',
valueField: 'ID',
value: vitrine,
allowBlank: true,
msgTarget: 'side'
}]
});
I tried to call the normal store.load(), but it have no effect and it shows no error on the console
If needed i will post more of the code, but i think just this should be enough
Thanks,
Looking through the code if ItemSelector it doesn't look like it supports any changes in the store once it's been binded. It basically creates local copies of the data. And if you call bindStore method to assign different store - it will erase your selection.
You can always improve code in ItemSelector to allow such behavior. It should not be a problem. You can subscribe to datachanged or load event of the store when binding to it, and then handle situation when store data is changed.
Actually i think the best way to do such thing is using ItemSelector`s "populateFromStore". Sure except of extending item selector. In case of extending you should look on the "onBindStore" function of the ItemSelector.
onBindStore: function(store, initial) {
var me = this;
if (me.fromField) {
me.fromField.store.removeAll()
me.toField.store.removeAll();
// Add everything to the from field as soon as the Store is loaded
if (store.getCount()) {
me.populateFromStore(store);
} else {
me.store.on('load', me.populateFromStore, me);
}
}
}
So as you see in case of the empty store it hooks to the load event. And it should be like this:
onBindStore: function(store, initial) {
var me = this;
if (me.fromField) {
me.fromField.store.removeAll()
me.toField.store.removeAll();
me.store.on('load', me.populateFromStore, me);
// Add everything to the from field as soon as the Store is loaded
if (store.getCount()) {
me.populateFromStore(store);
}
}
}
i have a panel which should show the "description" field of "currently activeitem of nestedlist". nestedlist uses the model having fields:
id
text
description
when user taps on any item of nestedList [on selectionchange OR itemtap&backtap], i want to change description in the panel with description of "currently activeItem of nestedList".
Is this possible?
thanks for any help/solution/pointer.
The same problem I had today, and no solution had been found with a nested list, because no single field can be taken from a Ext.data.TreeStore. One solution could be that you have lots of "if-function 'do with all the ID's and then you give each ID a text. But that's not good.
I've decided to make a simple list.
if you want I can show you my solution for the simple list
ps.: I use Sencha Touch 1.1
Update:
NotesApp.views.NaviList = new Ext.List({
fullscreen: true,
flex: 1,
layout: 'card',
scroll: false,
useToolbar: false,
itemTpl: '{text}',
store: store,
listeners: {
itemtap: function (obj, idx, el, e) {
var record = this.store.getAt(idx);
var tle = record.get('text');
index = record.get('index');
NotesApp.views.notesListContainer.setActiveItem(index, { type: 'slide', direction: 'left' });
}
}
}
});
description:
My App has the name: "NotesApp".
"notesListContainer" is a Container where all my List are displayed. "index" is an ID that I get from the store and the calls list.
Now when you tap on my NaviList you set a new ActiveItem in this Container.
thanks a lot for the reply. I also tried using simple list with one Ext.button(back button in case of nestedlist). On itemtap and buttonclink, i change list's content by
var t = new Ext.data.Store and list.setStore(t).
Please let me know if there is any other better option to do it.
I'm trying to use sencha touch's listpaging plugin. But there is almost no good( or bad ) documentation about how to use it and i'm confused.
When i activate the plugin in my list
this.myList = new Ext.List({
store: this.myStore,
plugins: [{
ptype: 'listpaging',
autoPaging: false
}],
itemTpl: '...'
});
a 'Load More' text and a loading image is added to the end of the list.
But i don't know how to configure my store to enable this plugin to be able to load more data.
App.regStore('MyStore', {
model: 'myModel',
proxy: {
type: 'ajax',
url: 'http://mydomain.com/json?howmany=10&page=1',
reader: {
type: 'json',
root: 'results'
}
}
});
App.stores.myStore = Ext.StoreMgr.get('MyStore');
How can i configure my store so when i tap "Load more", the store brings up page 2 and add them to the list automatically?
I've had a similar issue with the ListPaging plugin in SenchaTouch 2, and managed to sort out the 'load more' message behaviour when the end of the data set is reached.
This builds on what John Gordon has come up with (regarding specifying the pageSize and clearOnPageLoad config options), since these properties seem to be the same in Senchatouch 2. I haven't looked at SenchaTouch 1.x in detail. In SenchaTouch 2, all config options must be defined in a config property:
Ext.define('MessagingApp.store.MessageThreads', {
extend : 'Ext.data.Store',
requires: ['MessagingApp.model.MessageThread'],
config:
{
model: 'MessagingApp.model.MessageThread',
autoLoad: false,
clearOnPageLoad: false, // This is true by default
pageSize: 10, // This needs to be set for paging
proxy: {
type: 'jsonp',
pageParam: 'currentPage',
limitParam: 'pageSize',
url: APIURL + '/message-app-service/GetMessageThreads',
reader: {
type: 'json',
rootProperty: 'Data'
}
}
}
});
In the view, where we specify the plugins, we can override the 'load more' and 'no more records' messages:
{
xtype:'dataview',
store:'MessageThreads',
id:'threadList',
itemTpl:Ext.create('Ext.XTemplate',
'<!-- template markup goes here -->',
{
//custom helper functions here
}
),
plugins:[
{
xclass:'Ext.plugin.ListPaging',
autoPaging: true,
// These override the text; use CSS for styling
loadMoreText: 'Loading...',
noMoreRecordsText: 'All messages loaded'
}
]
}
The issue is that while our web service returns an array of records for a particular page, there is no overall total count property, which is needed for the plugin to determine when all records have been loaded. Hence as it is, the 'Load more' message will remain (issue #1 in the accepted solution). So in the init function of our controller, we have to attach an event handler for the load event on the store to hook into when a new page of data is received:
Ext.define('MessagingApp.controller.Messages',
{
extend: 'Ext.app.Controller',
config:
{
views: [
'MessageThreads',
// Other views referenced by this controller
],
stores: [
'MessageThreads'
],
refs:
{
// References to UI elements by selector...
}
},
init: function() {
// Other internal initialisation...
this.control(
{
// Selector-object pairs...
});
// Provide a means to intercept loads of each page of records
var threadStore = Ext.getStore('MessageThreads');
threadStore.addBeforeListener('load', this.checkForThreadListEnd, this);
},
// Remaining controller functions...
});
In the handler, we realise that we've reached the end of the data set when the number of records returned is less than the page size. If the total record count is a multiple of the page size, the last 'page' will have an empty array. Once the end of the data set has been identified, we update the totalCount config property of the store:
checkForThreadListEnd: function(store, records, isSuccessful) {
var pageSize = store.getPageSize();
var pageIndex = store.currentPage - 1; // Page numbers start at 1
if(isSuccessful && records.length < pageSize)
{
//Set count to disable 'loading' message
var totalRecords = pageIndex * pageSize + records.length;
store.setTotalCount(totalRecords);
}
else
store.setTotalCount(null);
},
// Other controller functions...
Because this is a 'before' event handler, this property will be crucially updated before the plugin decides whether to display the 'load more' or 'no more records' messages. Unfortunately, the framework doesn't provide a means to hide the 'no more records' message, so this would have to be done via CSS.
Hope this helps.
I'm having problems finding good documentation, too, but I can at least answer your question. You need to add pageSize to your store, clearOnPageLoad as well, if you want to not clear out what was already loaded. Her's my code:
Ext.regStore('publicresources', {
model: 'PublicResource',
autoLoad:false,
remoteFilter:true,
sortOnFilter:true,
pageSize: 15,
clearOnPageLoad: false,
sorters: [
{
property : 'distance',
direction: 'ASC'
}
]
});
My outstanding issues that I'm looking into are:
How to turn off the "More" element when there are no more records to load
How to detect that there are no more records to load, and where to put that detection code.
How to keep the list at the location that the user was at. Each load jumps back to the 1st item in the list
Good luck!
Remember also that this works only server side currently.
Forum thread http://www.sencha.com/forum/showthread.php?105193-Store-pageSize
In regards to the "load more vs. no more records" message -
If you are writing a custom proxy (example here A Sencha Touch MVC application with PhoneGap), you set the total records in the returned Operation.
If the total records are not yet known, you can do something like the below, where,
1) if you are returning the requested limit of records, set the total to something larger than the records the store will now hold
2) if returning < the requested limit of records, set the total to 1 (to force the "no more records message")
//return model instances in a result set
operation.resultSet = new Ext.data.ResultSet({
records: contacts,
//total : contacts.length,
total : contacts.length === operation._limit ? (operation._limit * operation._page +1) : 1,
loaded : true
});
//announce success
operation.setSuccessful();
operation.setCompleted();
//finish with callback
if (typeof callback == "function") {
callback.call(scope || thisProxy, operation);
}
Just to add what worked for me..
If your server returns a totalCount and you want to set it you can use the totalProperty in the reader
reader: {
type: 'json',
rootProperty: 'results',
totalProperty: 'resultCount'
}