BalloonTip JPanel的某些區域

我想在JPanel的特定區域上顯示balloon tip。我知道如何在JComponent上做到這一點。BalloonTip JPanel的某些區域

我對JPanel一條線，纔可能顯示BallonTip只有當就行了鼠標懸停。

感謝

來源

2014-01-31 CrazyProgrammer

如果你引用一個類，它是不是Java API中，也許你應該參考[庫] （https://balloontip.java.net/）以避免混淆。 –

請創建一個顯示您的問題的[最小，完整，測試和可讀示例]（https://stackoverflow.com/help/mcve）。 – Behe

使用jtooltiptext .. –

記住，JPanel從JComponent延伸，所以基本上，這是相同的過程。

Balloon

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.EventQueue; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.Rectangle; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.UIManager; 
import javax.swing.UnsupportedLookAndFeelException; 
import net.java.balloontip.CustomBalloonTip; 
import net.java.balloontip.examples.complete.Utils; 

public class Test { 

    public static void main(String[] args) { 
     new Test(); 
    } 

    public Test() { 
     EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       try { 
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
       } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { 
       } 

       JFrame frame = new JFrame("Testing"); 
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       frame.setLayout(new BorderLayout()); 
       frame.add(new TestPane()); 
       frame.pack(); 
       frame.setLocationRelativeTo(null); 
       frame.setVisible(true); 
      } 
     }); 
    } 

    public class TestPane extends JPanel { 

     private CustomBalloonTip customBalloonTip; 

     private Rectangle square = new Rectangle(50, 50, 200, 200); 

     public TestPane() { 
      customBalloonTip = new CustomBalloonTip(this, 
        new JLabel("<html>I'm a " + Utils.monospace("CustomBalloonTip") + ".</html>"), 
        square, 
        Utils.createBalloonTipStyle(), 
        Utils.createBalloonTipPositioner(), 
        null); 
      customBalloonTip.setVisible(false); 

      addMouseMotionListener(new MouseAdapter() { 

       @Override 
       public void mouseMoved(MouseEvent e) { 
        if (square.contains(e.getPoint())) { 
         customBalloonTip.setVisible(true); 
        } else { 
         customBalloonTip.setVisible(false); 
        } 
       } 

      }); 

     } 

     @Override 
     public Dimension getPreferredSize() { 
      return new Dimension(300, 300); 
     } 

     @Override 
     protected void paintComponent(Graphics g) { 
      super.paintComponent(g); 
      Graphics2D g2d = (Graphics2D) g.create(); 
      g2d.setColor(Color.RED); 
      g2d.fill(square); 
      g2d.dispose(); 
     } 
    } 

}

用點/線的交點現在

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.EventQueue; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.Point; 
import java.awt.Rectangle; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.awt.geom.Ellipse2D; 
import java.awt.geom.Line2D; 
import java.awt.geom.Point2D; 
import java.util.ArrayList; 
import java.util.List; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.UIManager; 
import javax.swing.UnsupportedLookAndFeelException; 
import net.java.balloontip.CustomBalloonTip; 
import net.java.balloontip.examples.complete.Utils; 

public class TestBalloon { 

    public static void main(String[] args) { 
     new TestBalloon(); 
    } 

    public TestBalloon() { 
     EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       try { 
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
       } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { 
       } 

       JFrame frame = new JFrame("Testing"); 
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       frame.setLayout(new BorderLayout()); 
       frame.add(new TestPane()); 
       frame.pack(); 
       frame.setLocationRelativeTo(null); 
       frame.setVisible(true); 
      } 
     }); 
    } 

    public class TestPane extends JPanel { 

     private CustomBalloonTip customBalloonTip; 

     private List<Line2D> lines = new ArrayList<>(25); 
     private Point2D hitPoint = null; 

     public TestPane() { 

      customBalloonTip = new CustomBalloonTip(this, 
        new JLabel("<html>I'm a " + Utils.monospace("CustomBalloonTip") + ".</html>"), 
        new Rectangle(0, 0, 1, 1), 
        Utils.createBalloonTipStyle(), 
        Utils.createBalloonTipPositioner(), 
        null); 
      customBalloonTip.setVisible(false); 

      lines.add(new Line2D.Float(0, 0, 300, 300)); 
      lines.add(new Line2D.Float(300, 0, 0, 300)); 

      hitPoint = null; 

      addMouseMotionListener(new MouseAdapter() { 

       @Override 
       public void mouseMoved(MouseEvent e) { 

        Point mp = e.getPoint(); 
        Rectangle offset = null; 

        for (Line2D line : lines) { 
         double distance = line.ptSegDist(mp); 
         if (distance <= 4) { 
          offset = new Rectangle(mp, new Dimension(1, 1)); 
         } 
        } 

        if (offset != null) { 
         System.out.println(offset); 
         customBalloonTip.setOffset(offset); 
         customBalloonTip.setVisible(true); 
        } else { 
         customBalloonTip.setVisible(false); 
        } 

        repaint(); 
       } 

      }); 

     } 

     @Override 
     public Dimension getPreferredSize() { 
      return new Dimension(300, 300); 
     } 

     @Override 
     protected void paintComponent(Graphics g) { 
      super.paintComponent(g); 
      Graphics2D g2d = (Graphics2D) g.create(); 
      g2d.setColor(Color.RED); 
      for (Line2D line : lines) { 
       g2d.draw(line); 
      } 

      if (hitPoint != null) { 
       Ellipse2D ellipse = new Ellipse2D.Double(hitPoint.getX() - 5, hitPoint.getY() + 5, 10, 10); 
       g2d.fill(ellipse); 
      } 
      g2d.dispose(); 
     } 
    } 
}

來源

2014-01-31 06:07:00 MadProgrammer

我不認爲OP是指工具提示。 –

@JoshM你可能是對的，但我認爲他們說*「我知道如何在JComponent上做它」*他們實際上是在談論一個工具提示... – MadProgrammer

呃，我以爲他指的是[這個]（https://balloontip.java.net/）：P –

BalloonTip JPanel的某些區域

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