I try to develop an app with MVC architecture. I've the following Controller code:
Ext.define('PM.controller.Projects', {
extend: 'Ext.app.Controller',
models: ['Project'],
stores: ['Projects'],
views: [
'projects.Tree',
'Toolbar',
],
init: function(config) {
var tree = this.getProjectsTreeView();
var rootNode = tree.getRootNode();
console.log(rootNode);
this.callParent(config);
}
});
And this view code:
Ext.define('PM.view.projects.Tree', {
extend: 'Ext.tree.Panel',
xtype: 'projectsTree',
title: 'Projects',
hideHeaders: true,
root: {
text: "Projekte"
}
});
It try to get the root node from my tree view in the controller but I get the error that getRootNode() is not a valid function in my controller. Can anybody tell me why I get this error? My target is to add new children to this root node from an ajax request.
Thanks
The methods Ext generates for each string in the views array return constructors that can be used to create the respective views. That seems bizarre, but that's how it is.
If you want to access the actual view component, you'll need to create a ref for it. Your init method should not assume that the view exists yet. It's very likely that it won't since the controller's init method is called before the application's launch method which is probably where all the views are getting added to the page.
You want to put your logic in the controller's onLaunch template method which is called after the application has been launched and your view has been added.
Ext.define('PM.controller.Projects', {
extend: 'Ext.app.Controller',
refs: [{
ref: 'projectsTreeView',
selector: 'projectsTree'
}],
init: function() {
// It's safe to add selectors for views that don't exist yet.
this.control(/*...*/)
},
onLaunch: function(config) {
var tree = this.getProjectsTreeView();
var rootNode = tree.getRootNode();
console.log(rootNode);
}
});
If this doesn't work, that means you aren't actually adding your view anywhere. One place you could add it is in the application's launch method. Something has to add the treeview.
Ext.application({
// ...
views: ['projects.Tree']
launch: function() {
Ext.create('Ext.container.Viewport', {
layout: 'fit',
items: [new this.getProjectsTreeView()]
});
}
});
So the chronology of events is this:
Application#constructor
Controller#constructor
Controller#init (can't assume the view exists)
Application#onBeforeLaunch
Application#launch (view is now added)
Controller#onLaunch (do something with the view that is now available)
Also, your view alias may need to be 'widget.projectsTree' not just 'projectsTree'.
Related
This is the controller code:
Ext.define('XXX.controller.XXX', {
extend: 'Ext.app.Controller',
config: {
views: ['CustomView','CarouselView'],
refs: {
custom: "carouselview #customid"
},
control: {
custom: {
initialize : function() {
alert("it's loading")
}
}
}
},
launch: function(){
Ext.Viewport.add(Ext.create('XXX.view.CustomView'));
console.log(this.getCustom()) // ——> This works, it is not undefined
}
});
and this is the carousel view code:
Ext.define('XXX.view.CarouselView', {
extend: 'Ext.Carousel',
xtype: 'carouselview',
defaults: {
styleHtmlContent: true
},
config:{
direction: 'horizontal',
items: [
{
xtype: 'customview',
itemId: 'customid'
}
]
}
});
Now it's the customview :
Ext.define('XXX.view.CustomView', {
extend: 'Ext.Panel',
xtype: 'customview',
config: {
tpl: XXX
}
});
in the controllers's launch function, it can log the right value, but the initialize event can't be triggered.
And if i change refs to { custom: "customview" }, the initialize event can be triggered.
IMHO you (and someone answered below) misunderstand the use of itemId config.
Here is the difference between id and itemId:
id is the global identifier of a component. It can be used directly as a selector in Ext.ComponentQuery class which refs uses behind the scene. So if you want something like "carouselview #customid", you have to use id instead of itemId.
itemId is the global identifier within a class from which the component derives from. For example, assume that you have an Ext.Button with itemId: "myCustomButton", then you can have access to it via this refs: button#myCustomButton (please note that there's no space between them). This way, Ext.ComponentQuery first looks for all components xtyped button, then find the instance with that itemId.
So, if you want to use some string as "first-class" selector, you will have to use id. If you want to use itemId, you may want to always include its xtype before the itemId. Therefore, 2 possible solutions are:
First solution (still use itemId): custom: "carouselview customview#customid"
Second solution: keep your refs, but change #customid from itemId to id
Hope this helps.
UPDATE:
Just figured out that you are trying to initialize on something that get's the itemId on initialize :) Sorry, took me some time.
Basically the fireEvent('initialize') has already been in the past when you are trying to listen to it in the controller.
Use the xtype to initialize or simply:
Ext.define('XXX.view.CustomView', {
extend: 'Ext.Panel',
xtype: 'customview',
config: {
tpl: XXX
},
initialize: function() { // good way to use initialize inside the view, as it belongs to the view and there is not user input handled
}
});
OR
Ext.define('XXX.controller.XXX', {
extend: 'Ext.app.Controller',
config: {
views: ['CustomView','CarouselView'],
refs: {
custom: ".carouselview .customview" // --> HERE use this
},
control: {
custom: {
initialize : function() {
alert("it's loading") // Yeah, now you are getting here
}
}
}
},
launch: function(){ // --> this will be the same as if you are placing it in app.js launch
Ext.Viewport.add(Ext.create('XXX.view.CustomView')); // --> here the initialize happends and this.getCustom() does not yet exists
console.log(this.getCustom()) // ——> here this.getCustom() exists
}
});
I have a MainController that listens to events in the entire app (globally).
My app has tab panel, and each panel is very complex and need to have its own controller (a lot of evets).
How will I add a special controller per tab panel to handle its own events?
If youll see bellow. I have the MainController opening new tabs in the method onMenuItemClick.
I want the MainController let other controllers handle the tab opening and tab event listening.
So for example.
MainController call CustomerController.
CustomerController listen to events on the customer tab only.
CustomerController extend BaseTabController.
BaseTabController listen to similar events across all tabs and handle tab opening.
This is what I have so far:
Ext.application({
name: 'App',
controllers: ['MainController'],
stores : ['MainMenuStore'],
autoCreateViewport: true,
appFolder: '/app',
});
Ext.define('App.controller.MainController', {
extend: 'Ext.app.Controller',
refs: [{ ref: 'tabs', selector: 'viewport > #tabs'}],
init: function () {
this.control({
'viewport > #nav': {
itemclick: this.onMenuItemClick
}
});
},
onMenuItemClick: function (view, rec) {
var id = rec.raw.panel;//Can be the controller name for example
var cls = "App.view." + id;
var tabs = this.getTabs();
var tab = tabs.child('#' + id);
console.log(tab);
if (!tab) {
tab = tabs.add(Ext.create(cls, {
itemId: id,
title: rec.get('text')
}));
}
tabs.setActiveTab(tab);
}
});
this is the basic uml that i want to achieve.
Thats exactly what DeftJS is for.
With DeftJs you can give each view its own controller. This will be applied for each instance of your views. Also, your special controllers can inhert from your base controller.
Check out the docs at DeftJS Docs
Example:
View:
Ext.define( 'MyProject.view.tab.Main', {
extend: 'Ext.tab.Panel',
controller: 'MyProject.controller.tab.Main',
...
Controller:
Ext.define( 'MyProject.controller.tab.Main', {
extend: 'Deft.mvc.ViewController',
...
I have a controller, and I want to pass a simple string value to the next View.
For that, I am creating the View like this.
var nextView = Ext.create('MyApp.view.NextView', {
content: 'value'
});
Ext.Viewport.add(nextView);
Ext.Viewport.animateActiveItem(nextView, {
type: 'slide',
direction: 'left'
});
On the NextView, I have a label and I want to set the HTML property of the label to the value that I am passing from the controller. ie. value.
My NextView looks like this.
Ext.define('MyApp.view.NextView', {
extend: 'Ext.form.Panel',
config: {
content: 'null',
items: [{
xtype: 'label',
html: 'value'
}]
}
});
I am not sure how to proceed from here. I can't have the NextView as a form. I just need to pass one string value in this situation.
What's the best way to achieve this?
Use initialize method to access config data like this:
Ext.define('MyApp.view.NextView', {
extend: 'Ext.form.Panel',
config: {
content: 'null',
items: [
{
xtype: 'label',
html: 'value'
}
]
},
initialize : function(){
this.callParent();
var val = this.config.content;
this.down('label').setHtml(val);
}
});
PS Feel free to use your favourite selector in down function
I know the question has been answered. But I just digged up a pretty natural way to pass data from controller to a view (using view's constructor). I use this in my integration of web desktop to my app.
In controller, pass data to the constructor of the view as followed:
loiTab = Ext.create('Iip.view.giips.admission.DetailedLoiTab', {closable: true, selectedLoiData: selected[0].data});
In the view, spin up a constructor as followed:
constructor: function(selectedLoiData) {
Ext.applyIf(this, selectedLoiData);
this.callParent();
},
The following method lives in the same file as the constructor. You can access selectedLoiData from any where in the view the constructor lives as followed:
initComponent: function(){
console.log(this.selectedLoiData);
}
I am trying to write a reusable item selection panel where the user has a grid with items he can choose from and a small text field that he can use to filter the content of the grid. Right now the (simplified) view code looks like this and works.
Ext.define('MyApp.view.items.ItemSelectorPanel', {
extend: 'Ext.panel.Panel',
require: 'MyApp.view.items.SimpleItemGrid',
alias: 'widget.ItemSelectorPanel',
layout: 'form',
config: {
itemStore: false
},
constructor: function(config) {
this.initConfig(config);
this.superclass.constructor.call(this, config);
this.add([
{
fieldLabel: 'Filter',
name: 'filter'
},
{
xtype: 'SimpleItemGrid',
collapsible: true,
store: this.getItemStore()
}
]);
return this;
}
});
As you can see the ItemSelectorPanel uses the config property to expose an interface where the calling site can specify which item store to use.
Calling site (in this case the panel is added to a TabPanel):
var panelToAdd = {
xtype: 'panel',
title: 'New Selection',
closable: true,
padding: 10,
items: [{
title: 'Select node',
xtype: 'ItemSelectorPanel',
itemStore: itemStore
}]
};
Now, I love the declarative style of ExtJS 4 and how it helps to follow the MVC pattern. I would prefer to have the least amount of code possible in the views. Unfortunately this does not work:
Ext.define('MyApp.view.items.ItemSelectorPanel', {
/* ... same as above ... */
constructor: function(config) {
this.initConfig(config);
this.superclass.constructor.call(this, config);
return this;
},
items: [
{
fieldLabel: 'Filter',
name: 'filter'
},
{
xtype: 'SimpleItemGrid',
collapsible: true,
store: this.getItemStore // <-- interesting part
}
]
});
Is there a way to expose the config of a nested/sub component via the config property of the parent property in a declarative manner?
First something in general
Never add an object outside a function within a class definition unless you exactly know what you are going to do. Cause if you do so all instances will share the same instance of that object. I think I do not need to mention where this leads to...
If you have a need to place a object there you should clone it within the constructor.
To your code
I dunno what this.initConfig(config); does but the config variable is not the one from your class, it is the one from the constructor argument. I recommend you also to use initComponent() for initialization instead of the constructor() unless you have a defined need for using the constructor, which in your case you don't seem to have.
Also a 'config' is not forwarded cause it don't get executed up->bottom but bottom->up where a config get's hand up and all other properties are (already) inherited.
I still do not exactly know what your goal is, therefore I cannot give you any advice how you should do this but I can say for sure that the way you do it will lead to problems.
Edit
I still not sure that I have fully understand your needs but the following should work (if you need the listeners too you might take a look at the Ext.util.Bindable mixin)
Ext.define('MyApp.view.items.ItemSelectorPanel', {
extend: 'Ext.panel.Panel',
require: 'MyApp.view.items.SimpleItemGrid',
alias: 'widget.ItemSelectorPanel',
layout: 'form',
initComponent: function() {
// Initialize the store (might be a instance or a storeId)
var store;
if (this.itemStore) {
store = Ext.data.StoreManager.lookup(store);
}
this.itemStore = store || null;
// Add is not valid (at least not before the parent inits are executed)
this.items = [{
fieldLabel: 'Filter',
name: 'filter'
}, {
xtype: 'SimpleItemGrid',
collapsible: true,
store: this.getItemStore()
}];
this.callParent(arguments);
},
getItemStore: function() {
return this.itemStore;
}
});
No, you can't do it in the way you've described. The reason is pretty simple, let's take this as an example:
Ext.define('MyClass', {
someProp: this.foo(),
foo: function(){
return bar;
}
});
Here, we call the define() method and we pass it an object as the configuration. As such, the whole object (including the call to foo()) is evaluated before it's even passed to define, so the class/method doesn't even exist at that point.
Even if you could do that, here's also the complication that foo is an instance method on the class, but the way you're attempting to call it is as though it's a static method.
So, the answer is, you'll need to use some kind of method to do so, initComponent is typically preferred over the constructor.
You can define items in declaration of your class but you cannot call any method from your class at time of declaration. To solve it, define only items without store and than use initComponent method to set store for your view.
I didn't see an answer that addressed the original question. Here is what I've found to work ...
Creating an instance of myClass, passing in a config 'foo' with value 'bar'
var myClassInstance = Ext.create('MyApp.view.myClass', {
foo: 'bar'
});
myClass is defined as follows :
Ext.define('MyApp.view.myClass', {
extend: 'Ext.container.Container',
alias: 'widget.myclass',
config: {
foo: 'defaultVal'
},
constructor: function(configs) {
this.callParent(arguments); //create class, calls initComponent
var try1 = getFoo(); //try1 is 'defaultVal'
this.initConfig(configs); //initializes configs passed in constructor
var try2 = getFoo(); //try2 is 'bar'
},
initComponent: function() {
//myClass declaration here ...
this.callParent();
}
I have a Grid Panel with a toolbar and an context menu.
The toolbar has a edit button and the context menu has a edit menu item.
Both shares the same properties (text, icon and handler)
Ext has something called Action which makes it possible to share functionality etc. between components, but til now I have had no success getting it to work in the MVC architecture
(I am using the new MVC architecture in 4.0)
My Action class looks like this:
Ext.define( 'App.action.EditAction', {
extend: 'Ext.Action',
text: 'Edit',
handler: function()
{
Ext.Msg.alert('Click', 'You did something.');
},
iconCls: 'icon-edit-user' ,
});
And in my context menu
requires: ['App.action.EditAction'],
initComponent: function()
{
var editUser = new App.action.EditAction();
this.items = [
editUser,
{
// More menuitems
}
...
];
this.callParent(arguments);
When running the code I get "config is undefined" in the console.
Can anyone point out what I am doing wrong?
Thanks in advance,
t
Passing an empty config to your constructor will avoid the error, but have unwanted consequences later because, unfortunately, the base class (Ext.Action) relies on this.initialConfig later on. For example, if you called editUser.getText() it would return undefined instead of the expected 'Edit'.
Another approach is to override your constructor to allow a no-arg invocation and apply your overridden configuration:
Ext.define( 'App.action.EditAction', {
extend: 'Ext.Action',
text: 'Edit',
constructor: function(config)
{
config = Ext.applyIf(config || {}, this);
this.callParent([config]);
},
handler: function()
{
Ext.Msg.alert('Click', 'You did something.');
},
iconCls: 'icon-edit-user' ,
});
As per Ext.Action constructor
constructor : function(config){
this.initialConfig = config;
this.itemId = config.itemId = (config.itemId || config.id || Ext.id());
this.items = [];
}
You must supply config not to get config is undefined exception in the second line (precisely in config.itemId part).
Updating your code as var editUser = new App.action.EditAction({}); should help(passing new empty object as config).
Surely, you could add some properties to the config object too.