public class TreeTableCellEditor extends DefaultCellEditor
To support editing of the tree column we can not make the tree editable. The reason this doesn't work is that you can not use the same component for editing and renderering. The table may have the need to paint cells, while a cell is being edited. If the same component were used for the rendering and editing the component would be moved around, and the contents would change. When editing, this is undesirable, the contents of the text field must stay the same, including the caret blinking, and selections persisting. For this reason the editing is done via a TableCellEditor.
Another interesting thing to be aware of is how tree positions its render and editor. The render/editor is
responsible for drawing the icon indicating the type of node (leaf, branch...). The tree is responsible for drawing
any other indicators, perhaps an additional +/- sign, or lines connecting the various nodes. So, the renderer is
positioned based on depth. On the other hand, table always makes its editor fill the contents of the cell. To get the
allusion that the table cell editor is part of the tree, we don't want the table cell editor to fill the cell bounds.
We want it to be placed in the same manner as tree places it editor, and have table message the tree to paint any
decorations the tree wants. Then, we would only have to worry about the editing part. The approach taken here is to
determine where tree would place the editor, and to override the reshape method in the JTextField
component to nudge the textfield to the location tree would place it. Since JXTreeTable will paint the tree behind
the editor everything should just work. So, that is what we are doing here. Determining of the icon position will
only work if the TreeCellRenderer is an instance of DefaultTreeCellRenderer. If you need custom TreeCellRenderers,
that don't descend from DefaultTreeCellRenderer, and you want to support editing in JXTreeTable, you will have to do
something similiar.
DefaultCellEditor.EditorDelegateclickCountToStart, delegate, editorComponentchangeEvent, listenerList| Constructor and Description |
|---|
TreeTableCellEditor(JTreeTable treeTable,
JTree tree)
Creates a new TreeTableCellEditor object.
|
| Modifier and Type | Method and Description |
|---|---|
Component |
getTableCellEditorComponent(JTable table,
Object value,
boolean isSelected,
int row,
int column)
Overriden to determine an offset that tree would place the editor at.
|
boolean |
isCellEditable(EventObject e)
This is overriden to forward the event to the tree.
|
cancelCellEditing, getCellEditorValue, getClickCountToStart, getComponent, getTreeCellEditorComponent, setClickCountToStart, shouldSelectCell, stopCellEditingaddCellEditorListener, fireEditingCanceled, fireEditingStopped, getCellEditorListeners, removeCellEditorListenerclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitaddCellEditorListener, removeCellEditorListenerpublic TreeTableCellEditor(JTreeTable treeTable, JTree tree)
treeTable - DOCUMENT ME!tree - DOCUMENT ME!IllegalArgumentException - DOCUMENT ME!public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
getRowBounds JTree method, and additionaly from the icon DefaultTreeCellRenderer will use.
The offset is then set on the TreeTableTextField component created in the constructor, and returned.
getTableCellEditorComponent in interface TableCellEditorgetTableCellEditorComponent in class DefaultCellEditortable - DOCUMENT ME!value - DOCUMENT ME!isSelected - DOCUMENT ME!row - DOCUMENT ME!column - DOCUMENT ME!public boolean isCellEditable(EventObject e)
isCellEditable in interface CellEditorisCellEditable in class DefaultCellEditore - DOCUMENT ME!Copyright © 2012–2026 cismet GmbH. All rights reserved.