Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.app.project.documents.view.toc.gui;

import java.awt.Color;

import java.awt.Component;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Rectangle;

import javax.swing.Icon;

import javax.swing.JCheckBox;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTree;

import javax.swing.SpringLayout;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.TreeCellRenderer;

import org.gvsig.app.project.documents.view.toc.ITocItem;

import org.gvsig.app.project.documents.view.toc.TocItemBranch;

import org.gvsig.fmap.mapcontext.layers.FLyrDefault;

/**

 * Renderer que actua sobre el TOC.

 * 

 * @author vcn

 */

public class TOCRenderer extends JPanel implements TreeCellRenderer {

    private static final long serialVersionUID = -6733445768959238193L;

    private JCheckBox check;

    private JLabel label;

    private static int MARGIN  = 100;

    private final Color editingColor;

    /**

     * toc background color

     */

    private final Color tocBgColor;

    /**

     * Creates a new TOCRenderer object.

     */

    public TOCRenderer(Color tocBackground) {

        this(Color.RED, tocBackground);

    }

    /**

     * Creates a new TOCRenderer object.

     */

    public TOCRenderer(Color editingColor, Color tocBackground) {

        this.editingColor = editingColor;

        this.tocBgColor = tocBackground;

        check = new JCheckBox();

        label = new JLabel();

        SpringLayout theLayout = new SpringLayout();

        this.setLayout(theLayout);

        // Adjust constraints for the text field so it's at

        // (<label's right edge> + 5, 5).

        this.add(check);

        this.add(label);

        theLayout.putConstraint(SpringLayout.WEST, label, 5, SpringLayout.EAST,

            check);

    }

    /**

     * Gets the dimension of the node.  

     * @param item

     * @param font

     * @return

     */

    private Dimension getNodeDimension(ITocItem item, Font font) {

            int textWidth = 0;

        int textHeight = 0;

        if(font != null && item.getLabel() != null) {

                FontMetrics metrics = this.getFontMetrics(font);

                textWidth = metrics.stringWidth(item.getLabel());

                textHeight = metrics.getHeight();

        }

        Dimension itemSize = item.getSize();

        int w = (int)Math.max(textWidth, itemSize.getWidth());

        int h = (int)Math.max(textHeight, itemSize.getHeight());

        return new Dimension(w + MARGIN, h);

    }

    /**

     * M?todo llamado una vez por cada nodo, y todas las veces que se redibuja

     * en pantalla el TOC.

     * 

     * @param tree

     * @param value

     * @param isSelected

     * @param expanded

     * @param leaf

     * @param row

     * @param hasFocus

     * 

     * @return

     */

    public Component getTreeCellRendererComponent(JTree tree, Object value,

        boolean isSelected, boolean expanded, boolean leaf, int row,

        boolean hasFocus) {

        DefaultMutableTreeNode n = (DefaultMutableTreeNode) value;

        Color foreground = tree.getForeground();

        this.label.setFont(tree.getFont());

        this.label.setBackground(this.tocBgColor);

        this.setBackground(this.tocBgColor);

        if (n.getUserObject() instanceof ITocItem) {

            ITocItem item = (ITocItem) n.getUserObject();

            label.setText(item.getLabel());

            Icon icono = item.getIcon();

            if (icono != null) {

                label.setIcon(icono);

            }

            this.validate();

            Dimension sizeNode = getNodeDimension(item, tree.getFont());

            this.setPreferredSize(sizeNode);

            if (item instanceof TocItemBranch) {

                TocItemBranch branch = (TocItemBranch) item;

                FLyrDefault lyr = (FLyrDefault) branch.getLayer();

                check.setVisible(true);

                check.setSelected(lyr.visibleRequired());

                check.setBackground(this.tocBgColor);

                if (!lyr.isAvailable()) {

                    check.setEnabled(false);

                } else {

                    check.setEnabled(true);

                    if (!lyr.isWithinScale(lyr.getMapContext().getScaleView())) {

                        check.setEnabled(false);

                    }

                    if (lyr.isEditing()) {

                        this.label.setForeground(editingColor);

                    } else {

                        this.label.setForeground(foreground);

                    }

                }

                if (lyr.isActive()) {

                    this.label.setFont(label.getFont().deriveFont(Font.BOLD));

                }

            } else {

                check.setVisible(false);

            }

        }

        if (leaf) {

            // label.setIcon(UIManager.getIcon("Tree.leafIcon"));

        } else if (expanded) {

            // label.setIcon(UIManager.getIcon("Tree.openIcon"));

        } else {

            // label.setIcon(UIManager.getIcon("Tree.closedIcon"));

        }

        return this;

    }

    public Rectangle getCheckBoxBounds() {

        return check.getBounds();

    }

}