Module javafx.controls
Package javafx.scene.control

Class TreeItem.TreeModificationEvent<T>

java.lang.Object
java.util.EventObject
javafx.event.Event
javafx.scene.control.TreeItem.TreeModificationEvent<T>
Type Parameters:
T - The TreeModificationEvent
All Implemented Interfaces:
Serializable, Cloneable
Enclosing class:
TreeItem<T>
public static class TreeItem.TreeModificationEvent<T> extends Event
An Event that contains relevant information for all forms of TreeItem modifications.
Since:
JavaFX 2.0
See Also:

  • Field Details

    • ANY

      public static final EventType<?> ANY
      Common supertype for all tree modification event types.
      Since:
      JavaFX 8.0

  • Constructor Details

    • TreeModificationEvent

      public TreeModificationEvent(EventType<? extends Event> eventType, TreeItem<T> treeItem)
      Constructs a basic TreeModificationEvent - this is useful in situations where the tree item has not received a new value, has not changed between expanded/collapsed states, and whose children has not changed. An example of when this constructor is used is when the TreeItem graphic property changes.
      Parameters:
      eventType - The type of the event that has occurred.
      treeItem - The TreeItem on which this event occurred.

    • TreeModificationEvent

      public TreeModificationEvent(EventType<? extends Event> eventType, TreeItem<T> treeItem, T newValue)
      Constructs a TreeModificationEvent for when the TreeItem has had its TreeItem.valueProperty() changed.
      Parameters:
      eventType - The type of the event that has occurred.
      treeItem - The TreeItem on which this event occurred.
      newValue - The new value that has been put into the TreeItem.valueProperty().

    • TreeModificationEvent

      public TreeModificationEvent(EventType<? extends Event> eventType, TreeItem<T> treeItem, boolean expanded)
      Constructs a TreeModificationEvent for when the TreeItem has had its TreeItem.expandedProperty() changed.
      Parameters:
      eventType - The type of the event that has occurred.
      treeItem - The TreeItem on which this event occurred.
      expanded - A boolean to represent the current expanded state of the TreeItem.

    • TreeModificationEvent

      public TreeModificationEvent(EventType<? extends Event> eventType, TreeItem<T> treeItem, List<? extends TreeItem<T>> added, List<? extends TreeItem<T>> removed)
      Constructs a TreeModificationEvent for when the TreeItem has had its children list changed.
      Parameters:
      eventType - The type of the event that has occurred.
      treeItem - The TreeItem on which this event occurred.
      added - A list of the items added to the children list of the given TreeItem.
      removed - A list of the items removed from the children list of the given TreeItem.

  • Method Details

    • getSource

      public TreeItem<T> getSource()
      Returns the TreeItem upon which this event occurred.
      Overrides:
      getSource in class EventObject
      Since:
      JavaFX 2.1

    • getTreeItem

      public TreeItem<T> getTreeItem()
      Returns the TreeItem that this event occurred upon.
      Returns:
      The TreeItem that this event occurred upon.

    • getNewValue

      public T getNewValue()
      If the value of the TreeItem changed, this method will return the new value. If it did not change, this method will return null.
      Returns:
      The new value of the TreeItem if it changed, null otherwise.

    • getAddedChildren

      public List<? extends TreeItem<T>> getAddedChildren()
      Returns the children added to the TreeItem in this event, or an empty list if no children were added.
      Returns:
      The newly added children, or an empty list if no children were added.

    • getRemovedChildren

      public List<? extends TreeItem<T>> getRemovedChildren()
      Returns the children removed from the TreeItem in this event, or an empty list if no children were added.
      Returns:
      The removed children, or an empty list if no children were removed.

    • getRemovedSize

      public int getRemovedSize()
      Returns the number of children items that were removed in this event, or zero if no children were removed.
      Returns:
      The number of removed children items, or zero if no children were removed.

    • getAddedSize

      public int getAddedSize()
      Returns the number of children items that were added in this event, or zero if no children were added.
      Returns:
      The number of added children items, or zero if no children were added.

    • wasExpanded

      public boolean wasExpanded()
      Returns true if this event represents a TreeItem expansion event, and false if the TreeItem was not expanded.
      Returns:
      true if this event represents a TreeItem expansion event, and false if the TreeItem was not expanded

    • wasCollapsed

      public boolean wasCollapsed()
      Returns true if this event represents a TreeItem collapse event, and false if the TreeItem was not collapsed.
      Returns:
      true if this event represents a TreeItem collapse event, and false if the TreeItem was not collapsed

    • wasAdded

      public boolean wasAdded()
      Returns true if this event represents a TreeItem event where children TreeItems were added.
      Returns:
      true if this event represents a TreeItem event where children TreeItems were added

    • wasRemoved

      public boolean wasRemoved()
      Returns true if this event represents a TreeItem event where children TreeItems were removed.
      Returns:
      true if this event represents a TreeItem event where children TreeItems were removed

    • wasPermutated

      public boolean wasPermutated()
      Returns true if the order of the TreeItem children list has changed, but that there have been no additions or removals.
      Returns:
      true if the order of the TreeItem children list has changed, but that there have been no additions or removals