i've a question to ask for my mvc project...
i have two controllers: Giurisprudenza e GiurisprudenzaNode, these controllers implement an index with the list of elements and a crud system to add/edit/remove elements. In the Girusiprudenza view page every element has a button that return you into the relative GiurisprudenzaNode page, with the list of elements contained into the primary element.
I would like to insert a label next to every element of the list in Giurisprudenza that say how many elements there are into that single primary element, but i don't know how to do that count... Anybody can help me?
for this you dont need two controllers or two different view .
For this you need to follow below steps.
Create a viewModel (Customize mix of both models)
add custom property in you this viewmodel for counts
create new view for this ViewModel class .
Let me know if you need code snippet for this.
View Model from MSDN
Related
Currently, I have a list view that allows items within the list view to be dismissable. I want each item within that list view to correspond to an element within another list that contains text. And when that widget in the listview is dismissed, then the corresponding element in the other list also gets deleted. Does anyone know hot
What I suggest is that if there is any common thing in both list that are related to each other such as id or any else say text in your case ,After dismissible widget get triggered iterate via the second list just check if there's any common based on the 1st list item, and delete the item rebuild the state. Maybe adding some code might be better but so far this is the best way you can do. let me know if it work.
I'm using Extjs5.1 powered by a MVC oriented code style.
I've got a main view which inherits from Ext.panel.Panel with a border layout.
On the east region, there's a grid with a store containing several records (or "models", I don't really know what terminology I should use here). (the "master grid")
On the center region, there is another view that inherits from a Ext.form.Panel and which is supposed to display the selected item of the grid . (the "slave form")
My goal is to refresh the "slave form" with the selected record of the "master grid".
The only way I found to "communicate" between the grid and the form is to execute a fireEvent('selectRecord', ...) from the main view controller and to listen to him inside the form view controller, but it seems odd as the form view is a child item of the main view.
Is there a more common way to do that?
By corrolary, is it a fine practice to make a view call functions of another view directly or should I make only their respective controllers interact?
What I usually do and I believe is the most common approach for this, is having a selectionchange event listener, that updates your form like this:
listeners : {
selectionchange: function(model, records) {
var rec = records[0];
if (rec) {
formpanel.getForm().loadRecord(rec);
}
}
}
for this to work, the name property of your form fields must match the name of the fields in the grid store model.
There is an example of this here: http://dev.sencha.com/extjs/5.1.0/examples/kitchensink/#form-grid
I am just wondering how can I get one of the UI5 views in an application.
I know there is a method:
sap.ui.jsview(); // in case the view is written in JavaScript
But the problem with this method is: if you assign ID for any of the controls and you have already inflated this view, you get an error.
So I want to know how to check if the view already exists and then if yes return that existing view, otherwise create the view with the corresponding API such as the above one.
I also know in the control for view I can go
this.getView();
But as I said, how to get this view from another view?
I am not quite understanding your question
With managed object id's are unique, so if you try and create the same view twice you will get an error.
when you create your view the easiest way to access it is via an Id
sap.ui.jsview("view1",'testapp.view.view1');
sap.ui.getCore().byId('view1');
NB. views should not talk to anyone other than their controller A terrific Model View Controller (MVC) diagram
sap.ui.getCore().byId(<id_of_the_view>)
Where <id_of_the_view> can be obtained in the following way:
suppose that the corresponding controller of <id_of_the_view> is "controllerA.js",
then you can console.log, inside controllerA.js,
console.log(this.getView())
This will print you an object which contains the id of such view. This will be <id_of_the_view>
I think here is one solution.
Make a global variable;
Use it to create element.
In First View:
var mytextField ;(use it as global)
mytextField = new sap.ui.commons.TextField('textfieldId');
In Second View:
var myValue = mytextField .getValue();
~Mansi Rao
i have a table view. In the table view, there is a custom UILabel, And each label with have a letter. "A, B, C, D" etc.. You can hit a plus button on the nav bar and it bring you to another view controller to enter info, and you hit save, and it adds the row onto the table view. Is there a way to utilize NSSortDescriptor/NSPredicate to make all the "A"'s together (together meaning i want all the cells with a to be with each other, but i still want them in the same section. ) if that makes sense! Is there a way to do this? Im using Core Data to save all my information. Any help is appreciated. Thanks in advance
I assume you are using NSFetchedResultsController. If not, please refactor and do.
The section grouping is anyway taken care of by the key path during the initialization of the fetched results controller with the argument sectionKeyPath.
As the sorting does not change, simply add a sort descriptor to the fetch request before initializing the fetched results controller:
fetchRequest.sortDescriptors = #[[NSSortDescriptor
sortDescriptorWithKey:#"textAttributeName" ascending:YES]];
where textAttributeName is the whatever you called your A B C label attribute in your entity.
I have an list of checkboxes on a GWT widget using Gwittir. I want to bind these checkbox values in my view to some values in my Model so that I can tell which ones are selected. How can I set up a binding to do this?
For a single value (one not in an array), I've been doing this:
Binding binding = new Binding();
binding.getChildren().add(
new Binding(viewObj.getTextBox(),"value",modelObj,"textValue"));
But I don't know how to transition this to work for an array of items. Please help.
I ended up not using Gwittir for those parts which dealt with arrays of data. Instead I manually transferred the data from my view to my controller when the user clicked a button which would record the state of all the checkboxes in an array to an array of values in the controller.