Interface CellEditor
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- All Known Subinterfaces:
- TableCellEditor, TreeCellEditor
- All Known Implementing Classes:
- AbstractCellEditor, DefaultCellEditor, DefaultTreeCellEditor
public interface CellEditorThis interface defines the methods any general editor should be able to implement.Having this interface enables complex components (the client of the editor) such as
JTreeandJTableto allow any generic editor to edit values in a table cell, or tree cell, etc. Without this generic editor interface,JTablewould have to know about specific editors, such asJTextField,JCheckBox,JComboBox, etc. In addition, without this interface, clients of editors such asJTablewould not be able to work with any editors developed in the future by the user or a 3rd party ISV.To use this interface, a developer creating a new editor can have the new component implement the interface. Or the developer can choose a wrapper based approach and provide a companion object which implements the
CellEditorinterface (SeeDefaultCellEditorfor example). The wrapper approach is particularly useful if the user want to use a 3rd party ISV editor withJTable, but the ISV didn't implement theCellEditorinterface. The user can simply create an object that contains an instance of the 3rd party editor object and "translate" theCellEditorAPI into the 3rd party editor's API.- See Also:
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CellEditorListener
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description voidaddCellEditorListener(CellEditorListener l)Adds a listener to the list that's notified when the editor stops, or cancels editing.voidcancelCellEditing()Tells the editor to cancel editing and not accept any partially edited value.ObjectgetCellEditorValue()Returns the value contained in the editor.booleanisCellEditable(EventObject anEvent)Asks the editor if it can start editing usinganEvent.voidremoveCellEditorListener(CellEditorListener l)Removes a listener from the list that's notifiedbooleanshouldSelectCell(EventObject anEvent)Returns true if the editing cell should be selected, false otherwise.booleanstopCellEditing()Tells the editor to stop editing and accept any partially edited value as the value of the editor.
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Method Detail
getCellEditorValue
Object getCellEditorValue()
Returns the value contained in the editor.- Returns:
- the value contained in the editor
isCellEditable
boolean isCellEditable(EventObject anEvent)
Asks the editor if it can start editing usinganEvent.anEventis in the invoking component coordinate system. The editor can not assume the Component returned bygetCellEditorComponentis installed. This method is intended for the use of client to avoid the cost of setting up and installing the editor component if editing is not possible. If editing can be started this method returns true.- Parameters:
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anEvent- the event the editor should use to consider whether to begin editing or not - Returns:
- true if editing can be started
- See Also:
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shouldSelectCell(java.util.EventObject)
shouldSelectCell
boolean shouldSelectCell(EventObject anEvent)
Returns true if the editing cell should be selected, false otherwise. Typically, the return value is true, because is most cases the editing cell should be selected. However, it is useful to return false to keep the selection from changing for some types of edits. eg. A table that contains a column of check boxes, the user might want to be able to change those checkboxes without altering the selection. (See Netscape Communicator for just such an example) Of course, it is up to the client of the editor to use the return value, but it doesn't need to if it doesn't want to.- Parameters:
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anEvent- the event the editor should use to start editing - Returns:
- true if the editor would like the editing cell to be selected; otherwise returns false
- See Also:
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isCellEditable(java.util.EventObject)
stopCellEditing
boolean stopCellEditing()
Tells the editor to stop editing and accept any partially edited value as the value of the editor. The editor returns false if editing was not stopped; this is useful for editors that validate and can not accept invalid entries.- Returns:
- true if editing was stopped; false otherwise
cancelCellEditing
void cancelCellEditing()
Tells the editor to cancel editing and not accept any partially edited value.
addCellEditorListener
void addCellEditorListener(CellEditorListener l)
Adds a listener to the list that's notified when the editor stops, or cancels editing.- Parameters:
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l- the CellEditorListener
removeCellEditorListener
void removeCellEditorListener(CellEditorListener l)
Removes a listener from the list that's notified- Parameters:
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l- the CellEditorListener
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