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Open Source (LGPL) JavaFX PDF Viewer
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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * CheckRenderer.java
 * ---------------
 */
package org.jpedal.examples.viewer.gui;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import javax.swing.*;
import javax.swing.plaf.ColorUIResource;
import javax.swing.tree.TreeCellRenderer;

public class CheckRenderer extends JPanel implements TreeCellRenderer {

    protected final JCheckBox check;
    protected final TreeLabel label;

    public CheckRenderer() {
        setLayout(null);
        add(check = new JCheckBox());
        add(label = new TreeLabel());
        check.setBackground(UIManager.getColor("Tree.textBackground"));
    }

    @Override
    public Component getTreeCellRendererComponent(final JTree tree, final Object value,
                                                  final boolean isSelected, final boolean expanded,
                                                  final boolean leaf, final int row, final boolean hasFocus) {

        final String stringValue = tree.convertValueToText(value, isSelected,
                expanded, leaf, row, hasFocus);

        setEnabled(tree.isEnabled());

        if (value instanceof CheckNode) {

            check.setSelected(((CheckNode) value).isSelected());
            setEnabled(((CheckNode) value).isEnabled());
            check.setEnabled(((CheckNode) value).isEnabled());

            label.setFont(tree.getFont());
            label.setText(stringValue);
            label.setSelected(isSelected);
            label.setFocus(hasFocus);

            return this;
        } else {
            return new JLabel(stringValue);
        }

    }

    @Override
    public Dimension getPreferredSize() {
        final Dimension d_check = check.getPreferredSize();
        final Dimension d_label = label.getPreferredSize();
        return new Dimension(d_check.width + d_label.width,
                (d_check.height < d_label.height
                        ? d_label.height : d_check.height));
    }

    @Override
    public void doLayout() {
        final Dimension d_check = check.getPreferredSize();
        final Dimension d_label = label.getPreferredSize();
        int y_check = 0;
        int y_label = 0;
        if (d_check.height < d_label.height) {
            y_check = (d_label.height - d_check.height) / 2;
        } else {
            y_label = (d_check.height - d_label.height) / 2;
        }
        check.setLocation(0, y_check);
        check.setBounds(0, y_check, d_check.width, d_check.height);
        label.setLocation(d_check.width, y_label);
        label.setBounds(d_check.width, y_label, d_label.width, d_label.height);
    }

    @Override
    public void setBackground(Color color) {
        if (color instanceof ColorUIResource) {
            color = null;
        }
        super.setBackground(color);
    }

    public static class TreeLabel extends JLabel {

        boolean isSelected;
        boolean hasFocus;

        TreeLabel() {
        }

        @Override
        public void setBackground(Color color) {
            if (color instanceof ColorUIResource) {
                color = null;
            }
            super.setBackground(color);
        }

        @Override
        public void paint(final Graphics g) {
            final String str;
            if ((str = getText()) != null && !str.isEmpty()) {
                if (isSelected) {
                    g.setColor(UIManager.getColor("Tree.selectionBackground"));
                } else {
                    g.setColor(UIManager.getColor("Tree.textBackground"));
                }
                final Dimension d = getPreferredSize();
                int imageOffset = 0;
                final Icon currentI = getIcon();
                if (currentI != null) {
                    imageOffset = currentI.getIconWidth() + Math.max(0, getIconTextGap() - 1);
                }
                g.fillRect(imageOffset, 0, d.width - 1 - imageOffset, d.height);
                if (hasFocus) {
                    g.setColor(UIManager.getColor("Tree.selectionBorderColor"));
                    g.drawRect(imageOffset, 0, d.width - 1 - imageOffset, d.height - 1);
                }
            }
            super.paint(g);
        }

        @Override
        public Dimension getPreferredSize() {
            Dimension retDimension = super.getPreferredSize();
            if (retDimension != null) {
                retDimension = new Dimension(retDimension.width + 3,
                        retDimension.height);
            }
            return retDimension;
        }

        void setSelected(final boolean isSelected) {
            this.isSelected = isSelected;
        }

        void setFocus(final boolean hasFocus) {
            this.hasFocus = hasFocus;
        }
    }
}