Module javafx.controls
Package javafx.scene.control

Class CheckBoxTreeItem<T>

  • Type Parameters:
    T - The type of the value contained within the TreeItem
    All Implemented Interfaces:
    EventTarget
    public class CheckBoxTreeItem<T>
extends TreeItem<T>
    TreeItem subclass that adds support for being in selected, unselected, and indeterminate states. This is useful when used in conjunction with a TreeView which has a CheckBoxTreeCell installed.

    A CheckBoxTreeItem can be independent or dependent. By default, CheckBoxTreeItem instances are dependent, which means that any changes to the selection state of a TreeItem will have an impact on parent and children CheckBoxTreeItem instances. If a CheckBoxTreeItem is set to be independent, this means that any changes to that CheckBoxTreeItem will not directly impact the state of parent and children CheckBoxTreeItem instances.

    The indeterminate property is used to represent the same concept as that in CheckBox.indeterminateProperty(), namely, that the CheckBox is neither selected or unselected. This is commonly used inside a TreeView when some, but not all, of a branches children are selected.

    A simple example of using the CheckBoxTreeItem class, in conjunction with CheckBoxTreeCell is shown below: 

    // create the tree model
 CheckBoxTreeItem<String> jonathanGiles = new CheckBoxTreeItem<>("Jonathan");
 CheckBoxTreeItem<String> juliaGiles = new CheckBoxTreeItem<>("Julia");
 CheckBoxTreeItem<String> mattGiles = new CheckBoxTreeItem<>("Matt");
 CheckBoxTreeItem<String> sueGiles = new CheckBoxTreeItem<>("Sue");
 CheckBoxTreeItem<String> ianGiles = new CheckBoxTreeItem<>("Ian");

 CheckBoxTreeItem<String> gilesFamily = new CheckBoxTreeItem<>("Giles Family");
 gilesFamily.setExpanded(true);
 gilesFamily.getChildren().addAll(jonathanGiles, juliaGiles, mattGiles, sueGiles, ianGiles);

 // create the treeView
 final TreeView<String> treeView = new TreeView<>();
 treeView.setRoot(gilesFamily);

 // set the cell factory
 treeView.setCellFactory(CheckBoxTreeCell.<String>forTreeView());
    Image of the CheckBoxTreeItem control
    Since:
    JavaFX 2.2
    See Also:
    CheckBoxTreeCell, TreeItem, CheckBox

    • Property Detail

      • selected

        public final BooleanProperty selectedProperty
        A BooleanProperty used to represent the selected state of this CheckBoxTreeItem.
        Returns:
        the selected state property of this CheckBoxTreeItem

      • independent

        public final BooleanProperty independentProperty
        A BooleanProperty used to represent the independent state of this CheckBoxTreeItem. The independent state is used to represent whether changes to a single CheckBoxTreeItem should influence the state of its parent and children.

        By default, the independent property is false, which means that when a CheckBoxTreeItem has state changes to the selected or indeterminate properties, the state of related CheckBoxTreeItems will possibly be changed. If the independent property is set to true, the state of related CheckBoxTreeItems will never change.

        See Also:
        isIndependent(), setIndependent(boolean)

    • Constructor Detail

      • CheckBoxTreeItem

        public CheckBoxTreeItem()
        Creates an empty CheckBoxTreeItem.

      • CheckBoxTreeItem

        public CheckBoxTreeItem​(T value)
        Creates a CheckBoxTreeItem with the value property set to the provided object.
        Parameters:
        value - The object to be stored as the value of this TreeItem.

      • CheckBoxTreeItem

        public CheckBoxTreeItem​(T value,
                        Node graphic)
        Creates a CheckBoxTreeItem with the value property set to the provided object, and the graphic set to the provided Node.
        Parameters:
        value - The object to be stored as the value of this CheckBoxTreeItem.
        graphic - The Node to show in the TreeView next to this CheckBoxTreeItem.

      • CheckBoxTreeItem

        public CheckBoxTreeItem​(T value,
                        Node graphic,
                        boolean selected)
        Creates a CheckBoxTreeItem with the value property set to the provided object, the graphic set to the provided Node, and the initial state of the selectedProperty() set to the provided boolean value.
        Parameters:
        value - The object to be stored as the value of this CheckBoxTreeItem.
        graphic - The Node to show in the TreeView next to this CheckBoxTreeItem.
        selected - The initial value of the selected property.

      • CheckBoxTreeItem

        public CheckBoxTreeItem​(T value,
                        Node graphic,
                        boolean selected,
                        boolean independent)
        Creates a CheckBoxTreeItem with the value property set to the provided object, the graphic set to the provided Node, the initial state of the selectedProperty() set to the provided boolean value, and the initial state of the independent property to the provided boolean value.
        Parameters:
        value - The object to be stored as the value of this CheckBoxTreeItem.
        graphic - The Node to show in the TreeView next to this CheckBoxTreeItem.
        selected - The initial value of the selected property.
        independent - The initial value of the independent property

    • Method Detail

      • checkBoxSelectionChangedEvent

        public static <T> EventType<CheckBoxTreeItem.TreeModificationEvent<T>> checkBoxSelectionChangedEvent()
        An EventType used when the CheckBoxTreeItem selection / indeterminate state changes. To use this, it is recommended that you use code along the lines of the following: 
         
 child1.addEventHandler(CheckBoxTreeItem.<String>checkBoxSelectionChangedEvent(), new EventHandler<TreeModificationEvent<String>>() {
     public void handle(TreeModificationEvent<String> event) {
          ...
     }
 });
        Type Parameters:
        T - The type of the value contained within the TreeItem.
        Returns:
        the EventType used when the CheckBoxTreeItem selection / indeterminate state changes

      • setSelected

        public final void setSelected​(boolean value)
        Sets the selected state of this CheckBoxTreeItem.
        Parameters:
        value - the selected state of this CheckBoxTreeItem

      • isSelected

        public final boolean isSelected()
        Returns the selected state of this CheckBoxTreeItem.
        Returns:
        true if CheckBoxTreeItem is selected

      • selectedProperty

        public final BooleanProperty selectedProperty()
        A BooleanProperty used to represent the selected state of this CheckBoxTreeItem.
        Returns:
        the selected state property of this CheckBoxTreeItem

      • setIndeterminate

        public final void setIndeterminate​(boolean value)
        Sets the indeterminate state of this CheckBoxTreeItem.
        Parameters:
        value - the indeterminate state of this CheckBoxTreeItem

      • isIndeterminate

        public final boolean isIndeterminate()
        Returns the indeterminate state of this CheckBoxTreeItem.
        Returns:
        true if CheckBoxTreeItem is indeterminate state

      • independentProperty

        public final BooleanProperty independentProperty()
        A BooleanProperty used to represent the independent state of this CheckBoxTreeItem. The independent state is used to represent whether changes to a single CheckBoxTreeItem should influence the state of its parent and children.

        By default, the independent property is false, which means that when a CheckBoxTreeItem has state changes to the selected or indeterminate properties, the state of related CheckBoxTreeItems will possibly be changed. If the independent property is set to true, the state of related CheckBoxTreeItems will never change.

        See Also:
        isIndependent(), setIndependent(boolean)

      • setIndependent

        public final void setIndependent​(boolean value)
        Sets the value of the property independent.
        Property description:
        A BooleanProperty used to represent the independent state of this CheckBoxTreeItem. The independent state is used to represent whether changes to a single CheckBoxTreeItem should influence the state of its parent and children.

        By default, the independent property is false, which means that when a CheckBoxTreeItem has state changes to the selected or indeterminate properties, the state of related CheckBoxTreeItems will possibly be changed. If the independent property is set to true, the state of related CheckBoxTreeItems will never change.

      • isIndependent

        public final boolean isIndependent()
        Gets the value of the property independent.
        Property description:
        A BooleanProperty used to represent the independent state of this CheckBoxTreeItem. The independent state is used to represent whether changes to a single CheckBoxTreeItem should influence the state of its parent and children.

        By default, the independent property is false, which means that when a CheckBoxTreeItem has state changes to the selected or indeterminate properties, the state of related CheckBoxTreeItems will possibly be changed. If the independent property is set to true, the state of related CheckBoxTreeItems will never change.