Package org.eclipse.jface.viewers

Class EditingSupport

java.lang.Object

org.eclipse.jface.viewers.EditingSupport

Direct Known Subclasses:

ObservableValueEditingSupport, PropertyEditingSupport

public abstract class EditingSupport
extends Object

EditingSupport is the abstract superclass of the support for cell editing.

Since:

3.3

Constructor Summary

Constructors

Constructor	Description
EditingSupport(ColumnViewer viewer)

Method Summary

Modifier and Type	Method	Description
protected abstract boolean	canEdit(Object element)	Is the cell editable
protected abstract CellEditor	getCellEditor(Object element)	The editor to be shown
protected abstract Object	getValue(Object element)	Get the value to set to the editor
ColumnViewer	getViewer()
protected void	initializeCellEditorValue(CellEditor cellEditor, ViewerCell cell)	Initialize the editor.
protected void	saveCellEditorValue(CellEditor cellEditor, ViewerCell cell)	Save the value of the cell editor back to the model.
protected abstract void	setValue(Object element, Object value)	Sets the new value on the given element.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EditingSupport

public EditingSupport(ColumnViewer viewer)

Parameters:

viewer - a new viewer

Method Detail

getCellEditor

protected abstract CellEditor getCellEditor(Object element)

The editor to be shown

Parameters:

element - the model element

Returns:

the CellEditor

canEdit

protected abstract boolean canEdit(Object element)

Is the cell editable

Parameters:

element - the model element

Returns:

true if editable

getValue

protected abstract Object getValue(Object element)

Get the value to set to the editor

Parameters:

element - the model element

Returns:

the value shown

setValue

protected abstract void setValue(Object element,
                                 Object value)

Sets the new value on the given element. Note that implementers need to ensure that getViewer().update(element, null) or similar methods are called, either directly or through some kind of listener mechanism on the implementer's model, to cause the new value to appear in the viewer.

Subclasses should overwrite.

Parameters:

element - the model element

value - the new value

getViewer

public ColumnViewer getViewer()

Returns:

the viewer this editing support works for

initializeCellEditorValue

protected void initializeCellEditorValue(CellEditor cellEditor,
                                         ViewerCell cell)

Initialize the editor. Frameworks like Databinding can hook in here and provide a customized implementation.

Standard customers should not overwrite this method but getValue(Object)

Parameters:

cellEditor - the cell editor

cell - the cell the editor is working for

saveCellEditorValue

protected void saveCellEditorValue(CellEditor cellEditor,
                                   ViewerCell cell)

Save the value of the cell editor back to the model. Frameworks like Databinding can hook in here and provide a customized implementation.

Standard customers should not overwrite this method but setValue(Object, Object)

Parameters:

cellEditor - the cell-editor

cell - the cell the editor is working for