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/*
 * $Id: TreeCellContext.java 3424 2009-07-30 10:53:39Z kleopatra $
 *
 * Copyright 2008 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.renderer;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
import javax.swing.plaf.basic.BasicGraphicsUtils;
import javax.swing.tree.TreePath;

import org.jdesktop.swingx.JXTree;

/**
 * Tree specific CellContext. 
 * 
 * 
    *
  • PENDING: use focus border as returned from list or table instead of * rolling its own? The missing ui-border probably is a consequence of the * border hacking as implemented in core default renderer. SwingX has a * composite default which should use the "normal" border. *
  • PENDING: selection colors couple explicitly to SwingX - should we go JXTree as * generic type? *
  • PENDING: for a JXTree use the icons as returned by the xtree api? *
*/ public class TreeCellContext extends CellContext { /** the icon to use for a leaf node. */ protected Icon leafIcon; /** the default icon to use for a closed folder. */ protected Icon closedIcon; /** the default icon to use for a open folder. */ protected Icon openIcon; /** the border around a focused node. */ private Border treeFocusBorder; /** * Sets state of the cell's context. Note that the component might be null * to indicate a cell without a concrete context. All accessors must cope * with. * * @param component the component the cell resides on, might be null * @param value the content value of the cell * @param row the cell's row index in view coordinates * @param column the cell's column index in view coordinates * @param selected the cell's selected state * @param focused the cell's focused state * @param expanded the cell's expanded state * @param leaf the cell's leaf state */ public void installContext(JTree component, Object value, int row, int column, boolean selected, boolean focused, boolean expanded, boolean leaf) { this.component = component; installState(value, row, column, selected, focused, expanded, leaf); this.dropOn = checkDropOnState(); } private boolean checkDropOnState() { if ((getComponent() == null)) { return false; } JTree.DropLocation dropLocation = getComponent().getDropLocation(); if (dropLocation != null && dropLocation.getChildIndex() == -1 && getComponent().getRowForPath(dropLocation.getPath()) == row) { return true; } return false; } @Override public JTree getComponent() { return (JTree) super.getComponent(); } //------------------- accessors for derived state /** * Returns the treePath for the row or null if invalid. * */ public TreePath getTreePath() { if (getComponent() == null) return null; if ((row < 0) || (row >= getComponent().getRowCount())) return null; return getComponent().getPathForRow(row); } /** * {@inheritDoc} *

* PENDING: implement to return the tree cell editability! */ @Override public boolean isEditable() { return false; // return getComponent() != null ? getComponent().isCellEditable( // getRow(), getColumn()) : false; } /** * {@inheritDoc} */ @Override protected Color getSelectionBackground() { Color selection = null; if (isDropOn()) { selection = getDropCellBackground(); if (selection != null) return selection; } if (getComponent() instanceof JXTree) { return ((JXTree) getComponent()).getSelectionBackground(); } return UIManager.getColor("Tree.selectionBackground"); } /** * {@inheritDoc} */ @Override protected Color getSelectionForeground() { Color selection = null; if (isDropOn()) { selection = getDropCellForeground(); if (selection != null) return selection; } if (getComponent() instanceof JXTree) { return ((JXTree) getComponent()).getSelectionForeground(); } return UIManager.getColor("Tree.selectionForeground"); } /** * {@inheritDoc} */ @Override protected String getUIPrefix() { return "Tree."; } /** * Returns the default icon to use for leaf cell. * * @return the icon to use for leaf cell. */ protected Icon getLeafIcon() { return leafIcon != null ? leafIcon : UIManager .getIcon(getUIKey("leafIcon")); } /** * Returns the default icon to use for open cell. * * @return the icon to use for open cell. */ protected Icon getOpenIcon() { return openIcon != null ? openIcon : UIManager .getIcon(getUIKey("openIcon")); } /** * Returns the default icon to use for closed cell. * * @return the icon to use for closed cell. */ protected Icon getClosedIcon() { return closedIcon != null ? closedIcon : UIManager .getIcon(getUIKey("closedIcon")); } /** * {@inheritDoc} *

* * Overridden to return a default depending for the leaf/open cell state. */ @Override public Icon getIcon() { if (isLeaf()) { return getLeafIcon(); } if (isExpanded()) { return getOpenIcon(); } return getClosedIcon(); } @Override protected Border getFocusBorder() { if (treeFocusBorder == null) { treeFocusBorder = new TreeFocusBorder(); } return treeFocusBorder; } /** * Border used to draw around the content of the node.

* PENDING: isn't that the same as around a list or table cell, but * without a tree-specific key/value pair in UIManager? */ public class TreeFocusBorder extends LineBorder { private Color treeBackground; private Color focusColor; public TreeFocusBorder() { super(Color.BLACK); treeBackground = getBackground(); if (treeBackground != null) { focusColor = new Color(~treeBackground.getRGB()); } } @Override public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) { Color color = UIManager.getColor("Tree.selectionBorderColor"); if (color != null) { lineColor = color; } if (isDashed()) { if (treeBackground != c.getBackground()) { treeBackground = c.getBackground(); focusColor = new Color(~treeBackground.getRGB()); } Color old = g.getColor(); g.setColor(focusColor); BasicGraphicsUtils.drawDashedRect(g, x, y, width, height); g.setColor(old); } else { super.paintBorder(c, g, x, y, width, height); } } /** * @return a boolean indicating whether the focus border * should be painted dashed style. */ private boolean isDashed() { return Boolean.TRUE.equals(UIManager .get("Tree.drawDashedFocusIndicator")); } /** * {@inheritDoc} */ @Override public boolean isBorderOpaque() { return false; } } }





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