org.jdesktop.swingx.treetable.TreeTableCellEditor Maven / Gradle / Ivy
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/*
* $Id: TreeTableCellEditor.java 3990 2011-03-31 13:41:08Z kleopatra $
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jdesktop.swingx.treetable;
import org.jdesktop.swingx.JXTable.GenericEditor;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.tree.TreeCellRenderer;
import java.awt.Component;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.util.EventObject;
/**
* An editor that can be used to edit the tree column. This extends
* DefaultCellEditor and uses a JTextField (actually, TreeTableTextField)
* to perform the actual editing.
* 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 rendering. 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 similar.
*
* @author Scott Violet
* @author Ramesh Gupta
*/
public class TreeTableCellEditor extends GenericEditor {
//DefaultCellEditor {
// JW: changed to extends GenericEditor to fix #1365-swingx -
// borders different in hierarchical column vs. table column
//
public TreeTableCellEditor(JTree tree) {
super(new TreeTableTextField());
if (tree == null) {
throw new IllegalArgumentException("null tree");
}
// JW: no need to...
this.tree = tree; // immutable
}
/**
* Overriden to determine an offset that tree would place the editor at. The
* offset is determined from the 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.
*/
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
Component component = super.getTableCellEditorComponent(table, value, isSelected, row, column);
// JW: this implementation is not bidi-compliant, need to do better
initEditorOffset(table, row, column, isSelected);
return component;
}
/**
* @param row
* @param isSelected
*/
protected void initEditorOffset(JTable table, int row, int column, boolean isSelected) {
if (tree == null)
return;
Object node = tree.getPathForRow(row).getLastPathComponent();
boolean leaf = tree.getModel().isLeaf(node);
boolean expanded = tree.isExpanded(row);
TreeCellRenderer tcr = tree.getCellRenderer();
Component editorComponent = tcr.getTreeCellRendererComponent(tree, node, isSelected, expanded, leaf, row, false);
((TreeTableTextField) getComponent()).init(row, column, table, tree, editorComponent);
}
/**
* This is overriden to forward the event to the tree. This will
* return true if the click count >= clickCountToStart, or the event is null.
*/
@Override
public boolean isCellEditable(EventObject e) {
// JW: quick fix for #592-swingx -
// editing not started on keyEvent in hierarchical column (1.6)
if (e instanceof MouseEvent) {
return ((MouseEvent) e).getClickCount() >= clickCountToStart;
}
return true;
}
/**
* Component used by TreeTableCellEditor. The only thing this does
* is to override the reshape method, and to ALWAYS
* make the x location be offset.
*/
private static class TreeTableTextField extends JTextField {
private int iconWidth;
void init(int row, int column, JTable table, JTree tree, Component editorComponent) {
this.column = column;
this.row = row;
this.table = table;
this.tree = tree;
updateIconWidth(editorComponent);
setComponentOrientation(table.getComponentOrientation());
}
/**
* @param treeComponent
*/
private void updateIconWidth(Component treeComponent) {
iconWidth = 0;
if (!(treeComponent instanceof JLabel))
return;
Icon icon = ((JLabel) treeComponent).getIcon();
if (icon != null) {
iconWidth = icon.getIconWidth() + ((JLabel) treeComponent).getIconTextGap();
}
}
private int column;
private int row;
private JTable table;
private JTree tree;
/**
* {@inheritDoc}
*
* Overridden to place the textfield in the node content boundaries,
* leaving the icon to the renderer.
*
* PENDING JW: insets?
*/
@SuppressWarnings("deprecation")
@Override
public void reshape(int x, int y, int width, int height) {
Rectangle cellRect = table.getCellRect(0, column, false);
Rectangle nodeRect = tree.getRowBounds(row);
nodeRect.width -= iconWidth;
if (table.getComponentOrientation().isLeftToRight()) {
int nodeStart = cellRect.x + nodeRect.x + iconWidth;
int nodeEnd = cellRect.x + cellRect.width;
super.reshape(nodeStart, y, nodeEnd - nodeStart, height);
} else {
int nodeRightX = nodeRect.x + nodeRect.width;
nodeRect.x = 0;
// ignore the parameter
width = nodeRightX - nodeRect.x;
super.reshape(cellRect.x + nodeRect.x, y, width, height);
}
}
}
private final JTree tree; // immutable
}