notion of property binding

Hello

In a popup, I created an entry field. and I did the property binding.

Whenever I run this page jspx... text entry field does not appear.

Please someone help me...

Thank you
Ashish

This case come only if you link two input component of the user interface with the same backing bean property binding.

Thank you
Prateek

Tags: Java

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ExtStackPane children change: { [Card@5b9067b3] added at 0 }


2)
ExtStackPane children change: { [Card@6b6328bd] added at 0 }
ExtStackPane children change: { [Card@6aca8cc5] added at 1 }


3)
ExtStackPane children change: { [Card@3b7bc340] added at 0 }
ExtStackPane children change: { [Card@1879819e] added at 1 }


4)
ExtStackPane children change: { [Card@60ffed67] added at 0 }
ExtStackPane children change: { [Card@64955a14] added at 1 }


5)
ExtStackPane children change: { [Card@5dc96bc4] added at 0 }
ExtStackPane children change: { [Card@40667c26] added at 1 }


6)
ExtStackPane children change: { [Card@164770fa] added at 0 }
ExtStackPane children change: { [Card@7decebbf] added at 1 }


7)
Card$1@f4f4850 active changed to: true
Parent is null.
ExtStackPane children change: { [Card@27442c8b] added at 0 }
ExtStackPane children change: { [Card@643d810e] added at 1 }


8)
Card$1@4877c67b active changed to: true
Parent is null.
ExtStackPane children change: { [Card@7e8a473e] added at 0 }
Card$1@2b4497c1 active changed to: true
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    card-panes.PNG

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        // 3
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        // 4
        Label label2 = new Label();
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        // 6
        label2.setText("World");




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        primaryStage.setTitle("Card Application");
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ExtStackPane children change: { [Card@6dfaa767] added at 0 }


2)
ExtStackPane children change: { [Card@6aa2c411] added at 1 }


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Parent is: ExtStackPane@41993867[styleClass=root]


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    Kind regards
    SAI Pradeep Dandem.

  • Sub binding property - more easy way?

    Look at the code below. It binds to the titleProperty contained in an item stored in an < element > ObjectProperty.
    import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.binding.StringBinding;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.stage.Stage;

public class BindingsTest extends Application {
  public static void main(String[] args) {
    launch(args);
  }

  @Override
  public void start(Stage primaryStage) {
    final ObjectProperty<Item> itemProperty = new SimpleObjectProperty<>();
    Item item = new Item();

    item.titleProperty().set("Title");

    StringBinding selectString = Bindings.selectString(itemProperty, "title");

    StringBinding title2 = new StringBinding() {
      {
        bind(itemProperty);
        if(itemProperty.get() != null) {
          bind(itemProperty.get().titleProperty());
        }
      }

      @Override
      protected void onInvalidating() {
        unbind(getDependencies());
        bind(itemProperty);
        if(itemProperty.get() != null) {
          bind(itemProperty.get().titleProperty());
        }
      }

      @Override
      protected String computeValue() {
        Item item2 = itemProperty.get();
        return item2 != null ? item2.getTitle().toUpperCase() : "(null)";
      }
    };

    System.out.println("Title = " + selectString.get() + "; uppercase title = " + title2.get());

    itemProperty.set(item);

    System.out.println("Title = " + selectString.get() + "; uppercase title = " + title2.get());

    item.titleProperty().set("New Title");

    System.out.println("Title = " + selectString.get() + "; uppercase title = " + title2.get());
  }

  public class Item {
    private final StringProperty title = new SimpleStringProperty();
    public String getTitle() { return title.get(); }
    public StringProperty titleProperty() { return title; }
  }
}
    The code prints:
    Title = null; uppercase title = (null)
Title = Title; uppercase title = TITLE
Title = New Title; uppercase title = NEW TITLE
    The constructor of the binding and the onInvalidating() part seems very convuluted. Initially I just put this in the anonymous constructor of StringBinding:
      bind(Bindings.selectString(itemProperty, "title"));
    Unfortunately, this doesn't seem to work. It will result in:
    Title = null; uppercase title = (null)
Title = Title; uppercase title = TITLE
Title = New Title; uppercase title = TITLE
    The idea here is to listen to the changes in the titleProperty... everywhere where itemProperty points to at the time. It works when linking directly, but apparently it does not work as a dependency of StringBinding.

    The best solutions?

    Published by: john16384 on February 14, 2012 21:56 
    itemProperty().addListener(new ChangeListener() {
  public void change(ObservableValue observableValue, Item oldValue, Item newValue) {
    if (oldValue != null) {
      uninstallItem(oldValue);
    }
    if (newValue != null) {
      installItem(newValue);
    }
  }
});

private void uninstallItem(Item oldValue) {
  titleProperty().unbind();
}

private void installItem(Item newValue) {
  titleProperty().bind(newValue.itemProperty());
}

    Published by: boumedienne on February 16, 2012 12:31

  • Attention impossible to bind to property 'somevar' on the 'Object' class object is not an IEventDispatcher?'

    Hi all

    How to fix under WARNING:

    Attention impossible to bind to property 'somevar' on the 'Object' class object is not an IEventDispatcher

    Thank you

    Sunil Rana

    Hi Paul,.

    I found the solution on the net & here's news

    Cast the data in your itemrenderer as an objectProxy.

    itemRender.mxml

    http://www.Adobe.com/2006/mxml '.

    verticalScrollPolicy = "off".

    horizontalScrollPolicy = "off".

    creationComplete = "init (); » >

    Import mx.utils.ObjectProxy;

    [Bindable]
    public var dataProxy:ObjectProxy;

    private function init (): void {}
    dataProxy = new ObjectProxy (data);
    }
    ]]>
        

    Thank you

    Sunil Rana

  • How to bind itemrender checkbox in a datagrid with the selecteditem property?

    Hey,.

    I have a datagrid with a checkbox column. I need the boxes to select different items I want to remove for example or do anything else with them. I thought to bind the checkboxes with the DataGrid.SelectedItems property but I Don t know how? Is there perhaps a better way to collect the elements of a datagrid control that are selected by a checkbox ItemRenderer?

    Thank you!

    What about Kat

    In this situation you must always be go the dataprovider of the DataGrid to see which check boxes are selected.

    So if the dataprovider for the DG does not have a field for the State of the checkbox, it is best to add a.

    Then simply change the field in the dataprovider for the line checjbox which is checked/uncheced and if you need to do something else on which boxes are checked, refer to the fields in the dataprovider.

    It is always best practice.

    If this post answers your question or assistance, please mark it as such.

  • lying to bind to the property

    I can't understand why I get this error. I have a DataGrid with an XML data provider.

    WARNING: cannot bind to property 'memory' class 'XML' (class is not an IEventDispatcher)
    WARNING: cannot bind to property 'value' class 'XMLList' (class is not an IEventDispatcher)
    WARNING: cannot bind to property 'disks' class 'XML' (class is not an IEventDispatcher)
    WARNING: cannot bind to property 'value' class 'XMLList' (class is not an IEventDispatcher)

    Everything works fine so why I get these warnings? My request is very simple, but the warning is displayed when I click on my datagrid object. This is the Basic code:

    [Bindable]
    private var _data:XML;

    private void resultHandler(event:ResultEvent):void {}

    _data = new XML (event.result);

    }


    My dataProvider = "{_data.file datagrid}"... " The code when I select an element is:

    < mx:Label text="{dg.selectedItem.memory}"/ >
    < mx:Label text="{dg.selectedItem.memory.@value}"/ >
    ....

    I'm new to Flex and it drives me crazy.

    I get the same caveat, but this works for me too.

    We can repair, or should we just ignore the warning?

    Mathias

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