Java Tutorial/Swing/JToolTip — различия между версиями

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Текущая версия на 15:34, 31 мая 2010

Adding JToolTip to component

Tooltip text is normally one line long.

Calling the public void setToolTipText(String text) method from JComponent to create a tooltip.



import javax.swing.JButton;
import javax.swing.JFrame;
public class ToolTipDemo {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton b = new JButton("Hello, World");
    frame.add(b,"Center");
    b.setToolTipText("asdf");
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





By default, the lines are left justified. Center the lines.

import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton component = new JButton();
    component.setToolTipText("<html><center>" + "This is a" + "<br>" + "tool tip"
        + "</center></html>");
  }
}





Creating Customized JToolTip Objects: customize and override its inherited public JToolTip createToolTip()

import java.awt.Color;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JToolTip;
public class ToolTipBackgroundForeground {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton b = new JButton("Hello, World") {
      public JToolTip createToolTip() {
        JToolTip tip = super.createToolTip();
        tip.setBackground(Color.YELLOW);
        tip.setForeground(Color.RED);
        return tip;
      }
    };
    frame.add(b,"Center");
    b.setToolTipText("asdf");
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Creating HTML 3.2 formatted text tooltip: the text string begins with "html" in any case

import java.awt.Color;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JToolTip;
public class ToolTipHTML {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton b = new JButton("Hello, World");
    frame.add(b,"Center");
    b.setToolTipText("<html>asdf<b>bold</b></html>");
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Customizing a JToolTip Look and Feel

Property StringObject TypeToolTip.backgroundColorToolTip.backgroundInactiveColorToolTip.borderBorderToolTip.borderInactiveColorToolTip.fontFontToolTip.foregroundColorToolTip.foregroundInactiveColorToolTip.hideAcceleratorBooleanToolTipUIString


Disable / enable application tool tips

import java.awt.FlowLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.ToolTipManager;
public class Main extends JFrame {
  public Main() throws HeadlessException {
    setSize(300, 300);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER));
    JButton disable = new JButton("DISABLE");
    disable.setToolTipText("disabled.");
    disable.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        ToolTipManager.sharedInstance().setEnabled(false);
      }
    });
    JButton enable = new JButton("ENABLE");
    enable.setToolTipText("enabled.");
    enable.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        ToolTipManager.sharedInstance().setEnabled(true);
      }
    });
    getContentPane().add(enable);
    getContentPane().add(disable);
  }
  public static void main(String[] args) {
    new Main().setVisible(true);
  }
}





Displaying Mnemonics in tooltip text

import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
public class MnemonicButton {
  public static void main(String args[]) {
    JFrame frame = new JFrame("DefaultButton");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton button1 = new JButton("Text Button");
    button1.setMnemonic(KeyEvent.VK_B);
    frame.add(button1);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Displaying Positional Tooltip Text: display different tooltip depending on the mouse pointer"s location

import javax.swing.JButton;
import javax.swing.JFrame;
public class DisplayingPositionalTooltip {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton button = new JButton("Hello, World") {
      public boolean contains(int x, int y) {
        if (x < 50) {
          setToolTipText("AAAAAAAAA");
        } else {
          setToolTipText("BBBBBBBBBBBBBB");
        }
        return super.contains(x, y);
      }
    };
    frame.add(button, "Center");
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}





Enabling and Disabling Tool Tips

import javax.swing.ToolTipManager;
public class Main {
  public static void main(String[] argv) throws Exception {
    // Enable tool tips for the entire application
    ToolTipManager.sharedInstance().setEnabled(true);
    // Disable tool tips for the entire application
    ToolTipManager.sharedInstance().setEnabled(false);
  }
}





Italicize the second line

import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton component = new JButton();
    component.setToolTipText("<html>" + "This is a" + "<br><i>" + "tool tip" + "</i></html>");
  }
}





Label with tooltip

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
import java.awt.GridLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
/*
 * LabelDemo.java needs one other file: images/middle.gif
 */
public class LabelDemo extends JPanel {
  public LabelDemo() {
    super(new GridLayout(3, 1)); // 3 rows, 1 column
    JLabel label1, label2, label3;
    ImageIcon icon = createImageIcon("images/middle.gif",
        "a pretty but meaningless splat");
    // Create the first label.
    label1 = new JLabel("Image and Text", icon, JLabel.CENTER);
    // Set the position of its text, relative to its icon:
    label1.setVerticalTextPosition(JLabel.BOTTOM);
    label1.setHorizontalTextPosition(JLabel.CENTER);
    // Create the other labels.
    label2 = new JLabel("Text-Only Label");
    label3 = new JLabel(icon);
    // Create tool tips, for the heck of it.
    label1.setToolTipText("A label containing both image and text");
    label2.setToolTipText("A label containing only text");
    label3.setToolTipText("A label containing only an image");
    // Add the labels.
    add(label1);
    add(label2);
    add(label3);
  }
  /** Returns an ImageIcon, or null if the path was invalid. */
  protected static ImageIcon createImageIcon(String path, String description) {
    java.net.URL imgURL = LabelDemo.class.getResource(path);
    if (imgURL != null) {
      return new ImageIcon(imgURL, description);
    } else {
      System.err.println("Couldn"t find file: " + path);
      return null;
    }
  }
  /**
   * Create the GUI and show it. For thread safety, this method should be
   * invoked from the event dispatch thread.
   */
  private static void createAndShowGUI() {
    // Create and set up the window.
    JFrame frame = new JFrame("LabelDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    // Add content to the window.
    frame.add(new LabelDemo());
    // Display the window.
    frame.pack();
    frame.setVisible(true);
  }
  public static void main(String[] args) {
    // Schedule a job for the event dispatch thread:
    // creating and showing this application"s GUI.
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        // Turn off metal"s use of bold fonts
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        createAndShowGUI();
      }
    });
  }
}





Make a tool tips appear immediately

import javax.swing.ToolTipManager;
public class Main {
  public static void main(String[] argv) throws Exception {
    // Get current delay
    int initialDelay = ToolTipManager.sharedInstance().getInitialDelay();
    // Show tool tips immediately
    ToolTipManager.sharedInstance().setInitialDelay(0);
    // Show tool tips after a second
    initialDelay = 1000;
    ToolTipManager.sharedInstance().setInitialDelay(initialDelay);
  }
}





Making Tool Tips Remain Visible

import javax.swing.ToolTipManager;
public class Main {
  public static void main(String[] argv) throws Exception {
    // Get current delay
    int dismissDelay = ToolTipManager.sharedInstance().getDismissDelay();
    // Keep the tool tip showing
    dismissDelay = Integer.MAX_VALUE;
    ToolTipManager.sharedInstance().setDismissDelay(dismissDelay);
  }
}





Modify the behaviour of the default JToolTip

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Point;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JToolTip;
public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("JToolTip Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton b1 = new JButton("Button 1") {
      public JToolTip createToolTip() {
        JToolTip tip = super.createToolTip();
        tip.setForeground(Color.YELLOW);
        return tip;
      }
      public Point getToolTipLocation(MouseEvent event) {
        return new Point((event.getX() + 100), (event.getY() + 100));
      }
    };
    b1.setToolTipText("HELLO");
    frame.add(b1, BorderLayout.NORTH);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}





Set the location of the tool tip such that its nw corner coincides with the bottom center of the button

import java.awt.Point;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton("My Button") {
      public Point getToolTipLocation(MouseEvent event) {
        return new Point(getWidth() / 2, getHeight());
      }
    };
  }
}





Setting the Location of a Tool Tip

import java.awt.Point;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton("My Button") {
      public Point getToolTipLocation(MouseEvent event) {
        return new Point(0, 0);
      }
    };
  }
}





Showing an Image in a Tool Tip

import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton component = new JButton();
    String imageName = "file:image.jpg";
    component.setToolTipText("<html>Here is an image <img src=" + imageName + "></html>");
  }
}





Showing Multiple Lines in a Tool Tip

import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton component = new JButton();
    component.setToolTipText("<html>" + "This is a" + "<br>" + "tool tip" + "</html>");
  }
}





Use images in tooltips

import javax.swing.JFrame;
import javax.swing.JLabel;
public class Main {
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    JLabel label = new JLabel("Label with image in Tooltip!");
    label.setToolTipText("<html><img src=\"" + Main.class.getResource("tooltip.gif")
        + "\"> Tooltip ");
    label.setHorizontalAlignment(JLabel.CENTER);
    frame.setContentPane(label);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(100, 100, 200, 100);
    frame.setVisible(true);
  }
}





Use the default tool tip location

import java.awt.Point;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
public class Main {
  public static void main(String[] argv) throws Exception {
    JButton button = new JButton("My Button") {
      public Point getToolTipLocation(MouseEvent event) {
        return null;
      }
    };
    // Set the tool tip text
    button.setToolTipText("aString");
  }
}


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/Swing/JToolTip&oldid=3988»