Servis-Rhino 4211B Guia do Utilizador descarregar pdf (Página 276)

to set the table to be editable. By default, it is flagged as not editable. We can call:

myTable.setEditable(true)

to achieve this.

There is a lifecycle associated with cell editing. When one has finished editing the cell, the

column's onEditCommit() callback is invoked. This is responsible for hardening the change

back to the data when the edit completes.

To use this we would define a lambda callback such as:

myColumn.setOnEditCommit((CellEditEvent<DataClass, ColumnClass> t) -> {

// Update Data

});

Ok … so how do we know what to update? Well the CellEditEvent class contains a wealth of

information getters including:

• getTableView() - The table view that was edited

• getTablePosition() - A TablePosition that defines a row and a column

• getNewValue() - The new value that was the result of the edit

So now we can do things like:

int changedRow = t.getTablePosition().getRow();

Person p = (Person)t.getTableView.getItems().get(changedRow);

p.setName(t.getNewValue());

Some convenience editors are provided:

• TextFieldTableCell – Display a text input field.

• CheckBoxTableCell – Display a check box field.

• ChoiceBoxTableCell – Display a choice box showing a fixed set of options

• ComboBoxTableCell

• ProgressBarTableCell

See also:

• JavaFX MultipleSelectionModel

• Tutorial – JavaFX TableView

JavaFX TableView – Detecting selections

The TableView contains a property called "selectionModel" which can be retrieved via

"getSelectionModel()". Through this, we can register an interest in being told when a

selection change is made.

For example:

tableView.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) ->

{

// Handler code here

});

JavaFX TableView – Dynamic Columns

On occasion we may wish to dynamically add and remove columns. From an instance of a

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