titlepropertyeditpanel.java

jfreechart安装程序和使用说明

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------------------
 * TitlePropertyEditPanel.java
 * ---------------------------
 * (C) Copyright 2000-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Arnaud Lelievre;
 *                   Daniel Gredler;
 *
 * $Id: TitlePropertyEditPanel.java,v 1.1 2004/08/31 14:54:21 mungady Exp $
 *
 * Changes (from 24-Aug-2001)
 * --------------------------
 * 24-Aug-2001 : Added standard source headaer. Fixed DOS encoding problem (DG);
 * 07-Nov-2001 : Separated the JCommon Class Library classes, JFreeChart now requires
 *               jcommon.jar (DG);
 * 31-Jan-2002 : Removed Title.java and StandardTitle.java.  Disabled some methods in this class
 *               until support for AbstractTitle is added (DG);
 * 20-May-2003 : Restored initialisation of titleField and titlePaint to prevent
 *               NullPointer when using this class. (TM)
 * 08-Sep-2003 : Added internationalization via use of properties resourceBundle (RFE 690236) (AL); 
 * 08-Jan-2004 : Renamed AbstractTitle --> Title and moved to new package (DG);
 * 24-Aug-2004 : Applied patch 1014378 (DG);
 *
 */

package org.jfree.chart.ui;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ResourceBundle;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JColorChooser;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.title.Title;
import org.jfree.chart.title.TextTitle;
import org.jfree.layout.LCBLayout;
import org.jfree.ui.FontChooserPanel;
import org.jfree.ui.FontDisplayField;
import org.jfree.ui.PaintSample;

/**
 * A panel for editing the properties of a chart title.
 */
public class TitlePropertyEditPanel extends JPanel implements ActionListener {

    /** Whether or not to display the title on the chart. */
    private boolean showTitle;

    /** The checkbox to indicate whether or not to display the title. */
    private JCheckBox showTitleCheckBox;

    /** A field for displaying/editing the title text. */
    private JTextField titleField;

    /** The font used to draw the title. */
    private Font titleFont;

    /** A field for displaying a description of the title font. */
    private JTextField fontfield;

    /** The button to use to select a new title font. */
    private JButton selectFontButton;

    /** The paint (color) used to draw the title. */
    private PaintSample titlePaint;

    /** The button to use to select a new paint (color) to draw the title. */
    private JButton selectPaintButton;

    /** The resourceBundle for the localization. */
    protected static ResourceBundle localizationResources 
        = ResourceBundle.getBundle("org.jfree.chart.ui.LocalizationBundle");

    /**
     * Standard constructor: builds a panel for displaying/editing the
     * properties of the specified title.
     *
     * @param title  the title, which should be changed.
     */
    public TitlePropertyEditPanel(Title title) {

        TextTitle t = ( title != null ? (TextTitle) title : new TextTitle(localizationResources.getString("Title")) );
        this.showTitle = ( title != null );
        this.titleFont = t.getFont();
        this.titleField = new JTextField(t.getText());
        this.titlePaint = new PaintSample(t.getPaint());

        setLayout(new BorderLayout());

        JPanel general = new JPanel(new BorderLayout());
        general.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(), localizationResources.getString("General")));

        JPanel interior = new JPanel(new LCBLayout(4));
        interior.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 5));

        interior.add(new JLabel(localizationResources.getString("Show_Title")));
        this.showTitleCheckBox = new JCheckBox();
        this.showTitleCheckBox.setSelected(this.showTitle);
        this.showTitleCheckBox.setActionCommand("ShowTitle");
        this.showTitleCheckBox.addActionListener(this);
        interior.add(new JPanel());
        interior.add(this.showTitleCheckBox);

        JLabel titleLabel = new JLabel(localizationResources.getString("Text"));
        interior.add(titleLabel);
        interior.add(this.titleField);
        interior.add(new JPanel());

        JLabel fontLabel = new JLabel(localizationResources.getString("Font"));
        this.fontfield = new FontDisplayField(this.titleFont);
        this.selectFontButton = new JButton(localizationResources.getString("Select..."));
        this.selectFontButton.setActionCommand("SelectFont");
        this.selectFontButton.addActionListener(this);
        interior.add(fontLabel);
        interior.add(this.fontfield);
        interior.add(this.selectFontButton);

        JLabel colorLabel = new JLabel(localizationResources.getString("Color"));
        this.selectPaintButton = new JButton(localizationResources.getString("Select..."));
        this.selectPaintButton.setActionCommand("SelectPaint");
        this.selectPaintButton.addActionListener(this);
        interior.add(colorLabel);
        interior.add(this.titlePaint);
        interior.add(this.selectPaintButton);

        this.enableOrDisableControls();

        general.add(interior);
        add(general, BorderLayout.NORTH);
    }

    /**
     * Returns the title text entered in the panel.
     *
     * @return The title text entered in the panel.
     */
    public String getTitleText() {
        return this.titleField.getText();
    }

    /**
     * Returns the font selected in the panel.
     *
     * @return The font selected in the panel.
     */
    public Font getTitleFont() {
        return this.titleFont;
    }

    /**
     * Returns the paint selected in the panel.
     *
     * @return The paint selected in the panel.
     */
    public Paint getTitlePaint() {
        return this.titlePaint.getPaint();
    }

    /**
     * Handles button clicks by passing control to an appropriate handler method.
     *
     * @param event  the event
     */
    public void actionPerformed(ActionEvent event) {

        String command = event.getActionCommand();

        if (command.equals("SelectFont")) {
            attemptFontSelection();
        }
        else if (command.equals("SelectPaint")) {
            attemptPaintSelection();
        }
        else if (command.equals("ShowTitle")) {
            attemptModifyShowTitle();
        }
    }

    /**
     * Presents a font selection dialog to the user.
     */
    public void attemptFontSelection() {

        FontChooserPanel panel = new FontChooserPanel(this.titleFont);
        int result = 
            JOptionPane.showConfirmDialog(this, panel, 
                                          localizationResources.getString("Font_Selection"),
                                          JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);

        if (result == JOptionPane.OK_OPTION) {
            this.titleFont = panel.getSelectedFont();
            this.fontfield.setText(this.titleFont.getFontName() + " " + this.titleFont.getSize());
        }
    }

    /**
     * Allow the user the opportunity to select a Paint object.  For now, we
     * just use the standard color chooser - all colors are Paint objects, but
     * not all Paint objects are colors (later we can implement a more general
     * Paint chooser).
     */
    public void attemptPaintSelection() {
        Paint p = this.titlePaint.getPaint();
        Color defaultColor = ( p instanceof Color ? (Color) p : Color.BLUE );
        Color c = JColorChooser.showDialog(
            this, localizationResources.getString("Title_Color"), defaultColor
        );
        if (c != null) {
            this.titlePaint.setPaint(c);
        }
    }

    /**
     * Allow the user the opportunity to change whether the title is
     * displayed on the chart or not.
     */
    private void attemptModifyShowTitle() {
        this.showTitle = this.showTitleCheckBox.isSelected();
        this.enableOrDisableControls();
    }

    /**
     * If we are supposed to show the title, the controls are enabled.
     * If we are not supposed to show the title, the controls are disabled.
     */
    private void enableOrDisableControls() {
        boolean enabled = ( this.showTitle == true );
        this.titleField.setEnabled(enabled);
        this.selectFontButton.setEnabled(enabled);
        this.selectPaintButton.setEnabled(enabled);
    }

    /**
     * Sets the properties of the specified title to match the properties
     * defined on this panel.
     *
     * @param chart  the chart whose title is to be modified.
     */
    public void setTitleProperties(JFreeChart chart) {
        if (this.showTitle) {
            TextTitle title = chart.getTitle();
            if(title == null) {
                title = new TextTitle();
                chart.setTitle(title);
            }
            title.setText(this.getTitleText());
            title.setFont(this.getTitleFont());
            title.setPaint(this.getTitlePaint());
        }
        else {
            chart.setTitle( (TextTitle) null );
        }
    }

}