drawstringdemo.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 349 行

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 * 
 * Project Info:  http://www.jfree.org/jcommon/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.]
 * 
 * -------------------
 * DrawStringDemo.java
 * -------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: DrawStringDemo.java,v 1.3 2005/06/01 14:12:28 taqua Exp $
 *
 * Changes
 * -------
 * 10-Jun-2003 : Version 1;
 *
 */

package org.jfree.demo;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;

import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.FontChooserPanel;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.Spinner;
import org.jfree.ui.TextAnchor;

/**
 * A demo of some of the string drawing methods in the JCommon class library.
 *
 * @author David Gilbert
 */
public class DrawStringDemo extends ApplicationFrame 
                            implements ActionListener, PropertyChangeListener {

    /** The alignment anchor for the first panel. */
    private JComboBox combo1;

    /** The alignment anchor for the second panel. */
    private JComboBox combo2;

    /** The rotation anchor for the second panel. */
    private JComboBox combo3;

    /** A spinner for the second panel. */
    private Spinner spinner;

    /** String panel 1. */
    private DrawStringPanel drawStringPanel1;

    /** String panel 2. */
    private DrawStringPanel drawStringPanel2;

    /**
     * Creates a new demo instance.
     *
     * @param title  the frame title.
     */
    public DrawStringDemo(final String title) {
        super(title);
        setContentPane(createContentPane());
    }

    /**
     * Receives action events.
     *
     * @param event  the event.
     */
    public void actionPerformed(final ActionEvent event) {

        if (event.getActionCommand().equals("fontButton.clicked")) {
            displayFontDialog();
        }

        if (event.getActionCommand().equals("combo1.changed")) {
            handleCombo1Change();
        }
        if (event.getActionCommand().equals("combo2.changed")) {
            handleCombo2Change();
        }
        if (event.getActionCommand().equals("combo3.changed")) {
            handleCombo3Change();
        }

    }

    /**
     * Receives property change events.
     *
     * @param event  the event.
     */
    public void propertyChange(final PropertyChangeEvent event) {
        final int r = this.spinner.getValue();
        final double angle = Math.PI * 2.0 * (r / 360.0);
        this.drawStringPanel2.setAngle(angle);
        this.drawStringPanel2.invalidate();
        this.drawStringPanel2.repaint();
    }

    /**
     * Updates the display when combo 1 is updated.
     */
    private void handleCombo1Change() {
        final String text = this.combo1.getSelectedItem().toString();
        this.drawStringPanel1.setAnchor(convertStringToAnchor(text));
        this.drawStringPanel1.invalidate();
        this.drawStringPanel1.repaint();
    }

    /**
     * Updates the display when combo 2 is updated.
     */
    private void handleCombo2Change() {
        final String text = this.combo2.getSelectedItem().toString();
        this.drawStringPanel2.setAnchor(convertStringToAnchor(text));
        this.drawStringPanel2.invalidate();
        this.drawStringPanel2.repaint();
    }

    /**
     * Updates the display when combo 3 is updated.
     */
    private void handleCombo3Change() {
        final String text = this.combo3.getSelectedItem().toString();
        this.drawStringPanel2.setRotationAnchor(convertStringToAnchor(text));
        this.drawStringPanel2.invalidate();
        this.drawStringPanel2.repaint();
    }

    /**
     * Creates the content pane for the demo frame.
     *
     * @return The content pane.
     */
    private JPanel createContentPane() {

        final JPanel content = new JPanel(new BorderLayout());
        final JTabbedPane tabs = new JTabbedPane();

        tabs.add("Alignment", createTab1Content());
        tabs.add("Rotation", createTab2Content());

        content.add(tabs);
        return content;
    }

    /**
     * Creates the content for tab 1.
     *
     * @return The content panel.
     */
    private JPanel createTab1Content() {
        final JPanel content = new JPanel(new BorderLayout());
        this.combo1 = new JComboBox();
        this.combo1.setActionCommand("combo1.changed");
        populateTextAnchorCombo(this.combo1);
        this.combo1.addActionListener(this);

        final JPanel controls = new JPanel();
        controls.add(this.combo1);

        final JButton fontButton = new JButton("Select Font...");
        fontButton.setActionCommand("fontButton.clicked");
        fontButton.addActionListener(this);
        controls.add(fontButton);
        content.add(controls, BorderLayout.NORTH);
        this.drawStringPanel1 = new DrawStringPanel("0123456789", false);
        content.add(this.drawStringPanel1);
        return content;
    }

    /**
     * Creates the content for tab 2.
     *
     * @return The content panel.
     */
    private JPanel createTab2Content() {
        final JPanel content = new JPanel(new BorderLayout());
        final JPanel controls = new JPanel();
        controls.add(new JLabel("Text anchor: "));
        this.combo2 = new JComboBox();
        populateTextAnchorCombo(this.combo2);
        this.combo2.setActionCommand("combo2.changed");
        this.combo2.addActionListener(this);
        controls.add(this.combo2);
        controls.add(new JLabel("Rotation anchor: "));
        this.combo3 = new JComboBox();
        populateTextAnchorCombo(this.combo3);
        this.combo3.setActionCommand("combo3.changed");
        this.combo3.addActionListener(this);
        controls.add(this.combo3);
        this.spinner = new Spinner(0);
        this.spinner.addPropertyChangeListener(this);
        controls.add(this.spinner);
        content.add(controls, BorderLayout.NORTH);
        this.drawStringPanel2 = new DrawStringPanel("Rotated Text", true);
        content.add(this.drawStringPanel2);
        return content;
    }

    /**
     * Displays a primitive font chooser dialog to allow the user to change the font.
     */
    private void displayFontDialog() {

        final FontChooserPanel panel = new FontChooserPanel(this.drawStringPanel1.getFont());
        final int result = JOptionPane.showConfirmDialog(this, panel, "Font Selection",
                                                   JOptionPane.OK_CANCEL_OPTION,
                                                   JOptionPane.PLAIN_MESSAGE);

        if (result == JOptionPane.OK_OPTION) {
            this.drawStringPanel1.setFont(panel.getSelectedFont());
            this.drawStringPanel2.setFont(panel.getSelectedFont());
        }

    }

    /**
     * Populates a combo box with the available {@link TextAnchor} options.
     *
     * @param combo  the combo box.
     */
    private void populateTextAnchorCombo(final JComboBox combo) {
        combo.addItem("TextAnchor.TOP_LEFT");
        combo.addItem("TextAnchor.TOP_CENTER");
        combo.addItem("TextAnchor.TOP_RIGHT");
        combo.addItem("TextAnchor.HALF_ASCENT_LEFT");
        combo.addItem("TextAnchor.HALF_ASCENT_CENTER");
        combo.addItem("TextAnchor.HALF_ASCENT_RIGHT");
        combo.addItem("TextAnchor.CENTER_LEFT");
        combo.addItem("TextAnchor.CENTER");
        combo.addItem("TextAnchor.CENTER_RIGHT");
        combo.addItem("TextAnchor.BASELINE_LEFT");
        combo.addItem("TextAnchor.BASELINE_CENTER");
        combo.addItem("TextAnchor.BASELINE_RIGHT");
        combo.addItem("TextAnchor.BOTTOM_LEFT");
        combo.addItem("TextAnchor.BOTTOM_CENTER");
        combo.addItem("TextAnchor.BOTTOM_RIGHT");
    }

    /**
     * Converts a string to a corresponding {@link TextAnchor} instance.
     *
     * @param text  the text.
     *
     * @return The anchor.
     */
    private TextAnchor convertStringToAnchor(final String text) {

        if (text.equals("TextAnchor.TOP_LEFT")) {
            return TextAnchor.TOP_LEFT;
        }
        else if (text.equals("TextAnchor.TOP_CENTER")) {
            return TextAnchor.TOP_CENTER;
        }
        else if (text.equals("TextAnchor.TOP_RIGHT")) {
            return TextAnchor.TOP_RIGHT;
        }
        else if (text.equals("TextAnchor.CENTER_LEFT")) {
            return TextAnchor.CENTER_LEFT;
        }
        else if (text.equals("TextAnchor.CENTER")) {
            return TextAnchor.CENTER;
        }
        else if (text.equals("TextAnchor.CENTER_RIGHT")) {
            return TextAnchor.CENTER_RIGHT;
        }
        else if (text.equals("TextAnchor.HALF_ASCENT_LEFT")) {
            return TextAnchor.HALF_ASCENT_LEFT;
        }
        else if (text.equals("TextAnchor.HALF_ASCENT_CENTER")) {
            return TextAnchor.HALF_ASCENT_CENTER;
        }
        else if (text.equals("TextAnchor.HALF_ASCENT_RIGHT")) {
            return TextAnchor.HALF_ASCENT_RIGHT;
        }
        else if (text.equals("TextAnchor.BASELINE_LEFT")) {
            return TextAnchor.BASELINE_LEFT;
        }
        else if (text.equals("TextAnchor.BASELINE_CENTER")) {
            return TextAnchor.BASELINE_CENTER;
        }
        else if (text.equals("TextAnchor.BASELINE_RIGHT")) {
            return TextAnchor.BASELINE_RIGHT;
        }
        else if (text.equals("TextAnchor.BOTTOM_LEFT")) {
            return TextAnchor.BOTTOM_LEFT;
        }
        else if (text.equals("TextAnchor.BOTTOM_CENTER")) {
            return TextAnchor.BOTTOM_CENTER;
        }
        else if (text.equals("TextAnchor.BOTTOM_RIGHT")) {
            return TextAnchor.BOTTOM_RIGHT;
        }
        else {
            return null;
        } 

    }

    /**
     * The starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {

        final DrawStringDemo demo = new DrawStringDemo("DrawString Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}