TableView with dynamic and updatable columns

Hello!!

Im trying to encode a TableView with dynamic columns and I saw a lot of examples like this: create columns dynamically

But none who would work for my needs.

Its very simple:

I got a list of customers, and each has a list of purchases.

A purchase has a string "buyDetail" and a Date for the ship.

My TableView need the first column with the name of the client, and a column more for each day of existing ships.

We do not know previously days that will be used.

If the sum is greater than 100, for example, I need to be able to apply different styles.

Example:

Customer 02/01/2015 03/01/2015 09/01/2015
Morgan$400 (buyDetail)0$100
Luis00$20
Steven$1000
Hulk0$5$32

I can't use the properties because I don't know how to buy will have to each customer.

My best test (only for the first column) was next, but I can't buy it updated if I change the value in the cell:

I did not try to write other code columns because I feel that I don't hurt really...

This shows the names of Customer´s, but I can't manage if data modification.

table = new TableView<Customer>();
ObservableList<Customer> lista = FXCollections.observableList(registros);

table.setItems(lista);

TableColumn<Customer, Customer> customerNameColumn = new TableColumn<Customer, Customer>("");
  customerNameColumn.setCellValueFactory(new Callback<CellDataFeatures<Customer, Customer>, ObservableValue<Customer>>() {
  public ObservableValue<Customer> call(CellDataFeatures<Customer, Customer> p) {
  return new SimpleObjectProperty(p.getValue());
  }
  });

  customerNameColumn.setCellFactory(column -> {return new TableCell<Customer, Customer>() {
  @Override
  protected void updateItem(Customer item, boolean empty) {
  super.updateItem(item, empty);

  if (item == null || empty) {
  } else {
  setText(item.getName());
  //APPLY STYLE
  }
  }
  };
  });

  table.getColumns().addAll(customerNameColumn);

Post edited by: user13425433

The columns are available already update default... If you happen to use JavaFX properties for the value of the source.

The core of you're your question lies in your cellValueFactory.

Here we have only the cellValueFactory for the name, not for the other columns. So I'll take the name for example, and you have to adapt to the other columns.

But if you do something like this to your cellValueFactory:

new SimpleObjectProperty(p.getValue().getName());

Then the name can never be updated if it modifies the client instance: there is no "link" between the name and the property used by the table.

We have therefore 3 test case:

  • If the name is a property of JavaFX and you do something like:
TableColumn customerNameColumn = new TableColumn("Customer");
customerNameColumn .setCellValueFactory(new PropertyValueFactory<>("name"));

Then, if the name change pending Customer-> value in the table automatically changes.

It also works the other way around: If the table is editable, and the name property is not unalterable-> the value of the changes of names in the Customer instance follows the table has been changed.

  • Now, if your name is not a property of JavaFX but a Java Bean observable property instead (this means that you can register and unregister an instance of Java Bean PropertyChangeListener to this property), you can do:
TableColumn customerNameColumn = new TableColumn("Customer");
customerNameColumn.setCellValueFactory(new Callback, ObservableValue>() {
    @Override
    public ObservableValue call(TableColumn.CellDataFeatures p) {
        final Customer t = p.getValue();
        try {
            return JavaBeanStringPropertyBuilder.create().bean(t).name("name").build();
        } catch (NoSuchMethodException ex) {
            // Log that.
            return null;
        }
    }
});

In this way, you have created a JavaFX property that is bound to an observable property Java Bean.

Same as above, it works both ways when possible.

  • The latter case is that your name is neither a JavaFX property or a Java Bean-> you can not update unless you happen to create a kind of observer/listener that can update the property with the most recent value.

Something like that:

TableColumn customerNameColumn = new TableColumn("Customer");
customerNameColumn.setCellValueFactory(new Callback ObservableValue>() {
  public ObservableValue call(CellDataFeatures p) {
    final Customer t = p.getValue();
    final SimpleStringProperty result = new SimpleStringProperty ();
    result.setvalue(t.getName());
    t.addNameChangeListener(new NameChangeListener() {
      @Override
      public void nameChanged() {
        result.setvalue(t.getName());
      }
    });
    return result;
  }
});

If you don't do something like that, the value of the table will never change when the name changes in the instance because the table does not change.

Now, you will need to apply this theory to your price columns. I hope that I was clear enough to help you.

Tags: Java

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                        System.out.println("Nom: " + c.getNom() + " Selected: " + c.getSelected());
                        c.setSelected(new SimpleBooleanProperty(Boolean.TRUE));
                    }
                 } else {
                    for (Code c : dataCode) {
                        System.out.println("Nom: " + c.getNom() + " Selected: " + c.getSelected());                        
                        c.setSelected(new SimpleBooleanProperty(Boolean.FALSE));
                    }
                }


            }
        };
    }


    /**
     *
     */
    private void initColumnsSize() {
        this.codeNomCol.setMinWidth(300);
        this.codeAbregeCol.setMinWidth(200);
        this.codeSelectCol.setMinWidth(50);
    }






}

    The line

    c.setSelected(new SimpleBooleanProperty(Boolean.TRUE));

    bad air.

    It should be

    c.setSelected(true);

    This suggests that your class model Code is wrong: it should be built according to the model of properties JavaFX (see tutorial):

    public class Code {
     private final BooleanProperty selected ;
     public Code(boolean selected) {
          this.selected = new SimpleBooleanProperty(this, "selected", selected);
     }
     public final boolean getSelected() {
          return this.selected.get();
     }
     public final void setSelected(boolean selected) {
          this.selected.set(selected);
     }
     public final BooleanProperty selectedProperty() {
          return selected ;
     }
}

    (And similarly for the other properties).

    The problem is that when you change the selected property, the individual check boxes in the column of the table are respecting the old instances of BooleanProperty changes, not the new instance you just created.

  • TableView problem of automatic update in points 2.1 and 2.2

    Hi, guys!

    Initial situation: I have a TableView with some elements inside. I update an element (a user object), I remove it from the table and then I put it again to the same index.

    The labour code in 2.0.2:
    // Gets selected item
User selectedUser = (User) table.getSelectionModel().getSelectedItem();

// Updates the User object to show the new data in the table
selectedUser.setFirstName(fNameTF.getText());
selectedUser.setLastName(lNameTF.getText());
selectedUser.setRank((String) (rankCB.getSelectionModel().getSelectedItem()));
selectedUser.setPassword(passTF.getText());

// Updates table data.
// First gets the user Object index in the items list,
// then removes the user object from the table list,
// then adds the updated user object at the same index it was before.
int userObjectIndexInItemsList = table.getItems().indexOf(selectedUser);
table.getItems().remove(table.getItems().indexOf(selectedUser));
table.getItems().add(userObjectIndexInItemsList, selectedUser);
    Here's my problem: in the version 2.1 and 2.2 (b06) this no longer works. The table does not display the changed data. I also tried getTableItems tableData (new FXCollections.observableArrayList ()), then table.setItems (null), then table.setItems (tableData), but it did not work.
    So, the problem is that the FXCollections.observableArrayList () (which has been used to fill the table in the beginning) don't relate more to the table when a change is made.

    Possible, but not desired collaborative:
    1. total re-creation of the table.
    2. total recreation of the tableItems (create a new observable by new objects).

    Any suggestions?
    I don't want to recreate the table data whenever a change is made, in particular because it is based on a database.

    JavaFX has a fundamentally different way of handling these types of updates, which can make it difficult to implement this in your current system.

    In short, how updates work in JavaFX of the ListView, TreeView, and TableView is the following:

    Each view type is made of cells. The number of cells is usually pretty close to the amount of visible lines and each cell could be considered to represent a line.

    Each cell is basically a small piece of the user interface that adapts to everything that should appear on the line given at that time there. The updateItem method is called on these cells to associate them with an underlying element of the ObservableList (the model).

    Let's say that your "Items" in the model are objects with a person's name. An implementation of the cell could make this as follows:

      private static final class PersonTableCell extends TableCell {

    @Override
    protected void updateItem(final Person person, boolean empty) {
      super.updateItem(mediaNode, empty);

      if(!empty) {
        setText(person.getTitle());
      }
    }
  }

    The example above will also have the same problem to update your code, otherwise, if you change the subject Person in your model of the cell will not reflect the name changed.

    In JavaFX to inform the cell of the modification, you must add a listener to the property 'text' of your person object. This assumes that a Person object properties are the properties of style of JavaFX. This is done like this (using a binding that uses an internal auditor):

      private static final class PersonTableCell extends TableCell {

    @Override
    protected void updateItem(final Person person, boolean empty) {
      super.updateItem(mediaNode, empty);

      textProperty().unbind();

      if(!empty) {
        textProperty().bind(person.titleProperty());
      }
    }
  }

    The foregoing will automatically updated correctly each change to the title property of the person.

    However, this means that you need to change your Person object to use the JavaFX style properties. You donot have always this luxury hotel. However, there are other options. You could for example only support a "changedProperty" in the Person class and have cells listening to it, something like this:

      private static final class PersonTableCell extends TableCell {
    private Person oldPerson;
    private InvalidationListener listener;

    @Override
    protected void updateItem(final Person person, boolean empty) {
      super.updateItem(mediaNode, empty);

      if(oldPerson != null) {
        oldPerson.removeListener(listener);
        oldPerson = null;
      }

      if(!empty) {
        listener = new InvalidatonListener() {
          public void invalidated(Observable o) {
             setText(person.getTitle());
          }
        };
        person.addListener(listener);
        setText(person.getTitle());
      }
    }
  }

    Now whenever you want to trigger a "change", you call a method on the Person object that triggers a cancel event. All cells that are tuned to this person object will be notified and update.

    If you donot change the class of the person itself, you could also do this with a wrapper. You will have to experiment a little.

  • You will need to insert update column with the username?

    Hi all

    I'm new to this forum of the apex. New to apex as well.

    My question is do we have a form and a single column is editable by the user. whenever an update to this column, I need to write their name in the update column.

    I heard that we can do with trigger using the variable app_user. But in our project, they made authentication ldap for this form and when an employee login with their company login id they can see only this form of apex. no other option.

    In the same form, they were able to show the user name. I checked how they did it. they used * & user * variable for this. , It makes sense for you gentlemen?

    all I have to do is insert this & user in the column value.

    How to do this. I'm started working in the apex for the past four days alone. willing to bare with me if im a very stupid question.

    Thank you
    knani

    PS: I know that what im asking is the user name for the Web page the user name of the apex.

    Published by: kart on May 26, 2010 11:45

    Hello

    You can use: APP_USER substitution string.
    If you like to use that in the syntax of database trigger is v('APP_USER') for example

    :NEW.CHANGED_BY := NVL(v('APP_USER'), user);

    BR, Jari

  • Update column in a table with several lines at a time

    I created a tabular presentation, page 19, with a single editable column, STATUS. Let's say that there are 300 rows in this form.

    I would like to have a button that selects all lines and change the status to "AUTHORIZED", if the status is set to "PLANNED".

    Without passing through and using checkboxes on the tabular form, is there a way I can do this with a button and a process? Then my code would look like this in a process of PL/SQL:

    BEGIN
    UPDATE of the elements
    SET
    State = "AUTHORIZED."
    auth_date = sysdate,
    status_date = sysdate
    WHERE
    ID =: P3_ID
    AND status = 'PLANNED ';
    END;


    Thank you very much
    Maggie

    Maggie,

    There are some things that you need to consider:

    <script language="JavaScript" type="text/javascript">
function f_mass_update()
{
var counter = 0;
for (var i = 0; i < document.wwv_flow.f03.length; i++)

{var curr_id = document.wwv_flow.f03.id;

if ($x(curr_id).value == 'COMPLETE')

{$x(curr_id).value = 'CANCELED';
$x(curr_id).style.color = "darkred";
$x(curr_id).style.fontWeight = "bold";
$x(curr_id).style.background = "yellow";
$x(curr_id).style.width = "103px";
counter = counter + 1;}}

if (counter == 0)
{alert ('There are no more statuses to change!');}
else {alert(counter + ' Records updated!');}
}
</script>

    corresponds to the correct script if escape you COMPLETE as 'DONE' and CANCELLED as "CANCELLED". The same rules apply for the javascript that for most other languagas programming - numbers do not need to be escaped, but make the strings.

    The second thing is the question of your id to tabular presentation. In my case it was f03 but in your case, it's probably different. If you have created a tabular presentation Wizard does not touch, you could count the columns.
    If your column is the first column editable only be f03. The second will be f04 and so on. My recommendation is to use Firefox and download the Firebug extension. You can do this with firebug HTML > inspect and move the mouse on any item in your page. Click the actual cell in a table, and it will tell you a code like this:

    <input type="text" id="f03_0001" value="10" maxlength="2000" size="16" name="f03"/>

    Thus, the name of the element is f03.

    See the same page, now with an attached image of what I just explained:

    http://Apex.Oracle.com/pls/OTN/f?p=31517:213

    Denes Kubicek
    -------------------------------------------------------------------
    http://deneskubicek.blogspot.com/
    http://www.Opal-consulting.de/training
    http://Apex.Oracle.com/pls/OTN/f?p=31517:1
    -------------------------------------------------------------------

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