selectfontdialog.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) SelectFontDialog.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.dialog;
//导入核心Java类库
import java.awt.Font;
import java.awt.Insets;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JList;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JTextField;
import javax.swing.JScrollPane;
import javax.swing.DefaultListModel;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
//导入自定义Java类库
import hws.item.smart.Smart;
import hws.item.smart.misc.ImageShop;
import hws.item.smart.misc.BorderShop;
import hws.item.smart.misc.PopToolkit;
/**
 * 选择字体对话框
 *
 * @version 0.1 2005-05-16
 * @author Hwerz
 */
public class SelectFontDialog extends JDialog implements ListSelectionListener {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 静态常量
     */
    private static final String PLAIN = "常规";
    /**
     * 静态常量
     */
    private static final String BOLD = "粗体";
    /**
     * 静态常量
     */
    private static final String ITALIC = "斜体";
    /**
     * 静态常量
     */
    private static final String BOLD_ITALIC = "粗斜体";
    /**
     * 被选中的字体
     */
    private static Font font;
    /**
     * 字体文本框
     */
    private JTextField fontNameTextField;
    /**
     * 字形文本框
     */
    private JTextField fontStyleTextField;
    /**
     * 字号文本框
     */
    private JTextField fontSizeTextField;
    /**
     * 字体列表
     */
    private JList fontNameList;
    /**
     * 字形列表
     */
    private JList fontStyleList;
    /**
     * 字号列表
     */
    private JList fontSizeList;
    /**
     * 英文示例
     */
    private JLabel previewLabelEN;
    /**
     * 中文示例
     */
    private JLabel previewLabelCN;
    /*------------------------------------------------------------------------*
     *                                构造函数                                *
     *------------------------------------------------------------------------*/
    /**
     * Create a new instance of this class
     *
     * @param font 初始字体
     */
    public SelectFontDialog(Font font) {
        super(Smart.getInstance(), "选择字体", true);
        this.font = font;
        Container c = getContentPane();
        c.setLayout(new GridBagLayout());
        //工具栏面板
        GridBagConstraints constraints = new GridBagConstraints(
            //gridx, gridy
            0, 0,
            //gridwidth, gridheight
            GridBagConstraints.REMAINDER, 1,
            //weightx, weighty
            1.0, 0.0,
            //anchor
            GridBagConstraints.NORTH,
            //fill
            GridBagConstraints.HORIZONTAL,
            //insets
            new Insets(5, 0, 0, 0),
            //ipadx, ipady
            0, 0);
        c.add(new Toolbar(), constraints);
        //字体标签
        constraints.gridy = 1;
        constraints.gridwidth = 1;
        constraints.weightx = 0.0;
        constraints.anchor = GridBagConstraints.NORTHWEST;
        constraints.fill = GridBagConstraints.NONE;
        constraints.insets = new Insets(5, 5, 0, 0);
        c.add(new JLabel("字体："), constraints);
        //字形标签
        constraints.gridx = 1;
        c.add(new JLabel("字形："), constraints);
        //字号标签
        constraints.gridx = 2;
        constraints.insets = new Insets(5, 5, 0, 5);
        c.add(new JLabel("字号："), constraints);
        //字体文本框
        fontNameTextField = new JTextField(font.getFamily());
        fontNameTextField.setEditable(false);
        constraints.gridy = 2;
        constraints.gridx = 0;
        constraints.weightx = 0.4;
        constraints.fill = GridBagConstraints.HORIZONTAL;
        constraints.insets = new Insets(0, 5, 0, 0);
        c.add(fontNameTextField, constraints);
        //字形文本框
        fontStyleTextField = new JTextField(getFontStyle(font));
        fontStyleTextField.setEditable(false);
        constraints.gridx = 1;
        constraints.weightx = 0.3;
        c.add(fontStyleTextField, constraints);
        //字号文本框
        fontSizeTextField = new JTextField(String.valueOf(font.getSize()));
        fontSizeTextField.setEditable(false);
        constraints.gridx = 2;
        constraints.insets = new Insets(0, 5, 0, 5);
        c.add(fontSizeTextField, constraints);
        //字体列表
        DefaultListModel fontNameListModel = new DefaultListModel();
        String[] fontNames = getAllFontNames();
        for (int i = 0; i < fontNames.length; i++) {
            fontNameListModel.addElement(fontNames[i]);
        }
        fontNameList = new JList(fontNameListModel);
        fontNameList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        fontNameList.setSelectedValue(font.getFamily(), true);
        fontNameList.addListSelectionListener(this);
        JScrollPane scroller = new JScrollPane(fontNameList,
            JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        constraints.gridy = 3;
        constraints.gridx = 0;
        constraints.weightx = 0.4;
        constraints.weighty = 0.8;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(5, 5, 0, 0);
        c.add(scroller, constraints);
        //字形列表
        DefaultListModel fontStyleListModel = new DefaultListModel();
        fontStyleListModel.addElement(PLAIN);
        fontStyleListModel.addElement(BOLD);
        fontStyleListModel.addElement(ITALIC);
        fontStyleListModel.addElement(BOLD_ITALIC);
        fontStyleList = new JList(fontStyleListModel);
        fontStyleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        fontStyleList.setSelectedValue(getFontStyle(font), true);
        fontStyleList.addListSelectionListener(this);
        scroller = new JScrollPane(fontStyleList,
            JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        constraints.gridx = 1;
        constraints.weightx = 0.3;
        c.add(scroller, constraints);
        //字号列表
        DefaultListModel fontSizeListModel = new DefaultListModel();
        for (int i = 8; i <= 28; i = i + 2) {
            fontSizeListModel.addElement(String.valueOf(i));
        }
        fontSizeListModel.addElement("36");
        fontSizeListModel.addElement("48");
        fontSizeListModel.addElement("72");
        fontSizeList = new JList(fontSizeListModel);
        fontSizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        fontSizeList.setSelectedValue(String.valueOf(font.getSize()),  true);
        fontSizeList.addListSelectionListener(this);
        scroller = new JScrollPane(fontSizeList,
            JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        constraints.gridx = 2;
        constraints.insets = new Insets(5, 5, 0, 5);
        c.add(scroller, constraints);
        //英文示例
        previewLabelEN = new JLabel("This is a sample");
        previewLabelEN.setFont(font);
        previewLabelEN.setHorizontalAlignment(JLabel.CENTER);
        previewLabelEN.setBorder(BorderShop.EN_SAMPLE_BORDER);
        scroller = new JScrollPane(previewLabelEN,
            JScrollPane.VERTICAL_SCROLLBAR_NEVER,
            JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        scroller.setBorder(null);
        constraints.gridy = 4;
        constraints.gridx = 0;
        constraints.weightx = 0.5;
        constraints.weighty = 0.2;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(5, 5, 0, 0);
        c.add(scroller, constraints);
        //中文示例
        previewLabelCN = new JLabel("这是一个例子");
        previewLabelCN.setFont(font);
        previewLabelCN.setHorizontalAlignment(JLabel.CENTER);
        previewLabelCN.setBorder(BorderShop.CN_SAMPLE_BORDER);
        scroller = new JScrollPane(previewLabelCN,
            JScrollPane.VERTICAL_SCROLLBAR_NEVER,
            JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        scroller.setBorder(null);
        constraints.gridx = 1;
        constraints.gridwidth = GridBagConstraints.REMAINDER;
        constraints.insets = new Insets(5, 5, 0, 5);
        c.add(scroller, constraints);
        //设置对话框
        setSize(600, 450);
        setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
        PopToolkit.makeWindowCenter(this);
    }
    /*------------------------------------------------------------------------*
     *                                公共方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 返回选中的字体
     *
     * @return 选中的字体
     */
    public static Font getSelectedFont() {
        return font;
    }
    /*------------------------------------------------------------------------*
     *                                私有方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 返回指定Font对象的风格
     *
     * @param font 指定的Font对象
     * @return 指定Font对象的风格
     */
    private String getFontStyle(Font font) {
        String style = null;
        if (font.isPlain() == true) {
            style = PLAIN;
        } else if (font.isBold() == true) {
            if (font.isItalic() == true) {
                style = BOLD_ITALIC;
            } else {
                style = BOLD;
            }
        } else {
            style = ITALIC;
        }
        return style;
    }
    /**
     * 返回当前系统的所有可用字体
     *
     * @return 当前系统的所有可用字体
     */
    private String[] getAllFontNames() {
        GraphicsEnvironment ge =
            GraphicsEnvironment.getLocalGraphicsEnvironment();
        String fontNames[] = ge.getAvailableFontFamilyNames();
        return fontNames;
    }
    /**
     * 创建字体对象
     *
     * @return 创建的字体对象
     */
    private Font createFont() {
        int fontStyle;
        if (fontStyleTextField.getText().equals(PLAIN)) {
            fontStyle = Font.PLAIN;
        } else if (fontStyleTextField.getText().equals(BOLD)) {
            fontStyle = Font.BOLD;
        } else if (fontStyleTextField.getText().equals(ITALIC)) {
            fontStyle = Font.ITALIC;
        } else {
            fontStyle = Font.BOLD + Font.ITALIC;
        }
        return new Font(fontNameTextField.getText(), fontStyle,
            Integer.parseInt(fontSizeTextField.getText()));
    }
    /*------------------------------------------------------------------------*
     *                                实现方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 实现接口ListSelectionListener的方法
     *
     * @param event ListSelectionEvent对象
     */
    public void valueChanged(ListSelectionEvent event) {
        JList list = (JList) event.getSource();
        if (list == fontNameList) {
            fontNameTextField.setText(list.getSelectedValue().toString());
        } else if (list == fontStyleList) {
            fontStyleTextField.setText(list.getSelectedValue().toString());
        } else {
            fontSizeTextField.setText(list.getSelectedValue().toString());
        }
        Font font = createFont();
        previewLabelEN.setFont(font);
        previewLabelCN.setFont(font);
    }
    /*------------------------------------------------------------------------*
     *                                 内部类                                 *
     *------------------------------------------------------------------------*/
    /**
     * 工具栏面板
     */
    class Toolbar extends JPanel implements ActionListener {
        /**
         * Create a new instance of this class
         */
        public Toolbar() {
            super(new FlowLayout(FlowLayout.CENTER, 5, 0));
            //确定
            JButton button = new JButton("确定", ImageShop.OK_IMAGEICON);
            button.addActionListener(this);
            add(button);
            //取消
            button = new JButton("取消", ImageShop.CANCEL_IMAGEICON);
            button.addActionListener(this);
            add(button);
        }
        /**
         * 实现接口ActionListener的方法
         *
         * @param event the event that characterizes the action
         */
        public void actionPerformed(ActionEvent event) {
            String command = event.getActionCommand();
            if (command.equals("确定") == true) {
                font = createFont();
                SelectFontDialog.this.dispose();
            } else {
                SelectFontDialog.this.dispose();
            }
        }
    }
}