我們如何在2個面板之間繪製線條擺動

Question

只需通過繪製一條線連接面板b/w他們。

我有兩個面板，兩個面板都包含一個Jtable.I想要將一個面板的jtable的每個單元連接到另一個jpanel的另一個Jtable。

在這裏，我想畫一樣，我有粉紅色圓圈突出的線條。

，這是代碼片段我使用創建JTable

DefaultTableModel fcdbDataModel = new DefaultTableModel(fcdbIdTxnArray, 
    fcdbIdTxnColumnArray); 
fcdbIdTxnJTable = new FieldMapperJTable(fcdbDataModel); 

這裏FieldMapperJTable是我定製JTable類。

Answer 1

你可以很容易地使用JFrame/JDialog GlassPane作爲繪畫領域。只需將您的自定義組件設置爲框架的玻璃窗格並直接在其上繪製鏈接即可。

您還可以使用框架/對話框的分層窗格執行相同操作。

下面是如何在玻璃面板組件上得出這樣的「鏈接」的小工作示例：

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.HashMap; 
import java.util.Map; 

/** 
* @see http://stackoverflow.com/a/12389479/909085 
*/ 

public class ComponentLinkerTest extends JComponent 
{ 
    private Map<JComponent, JComponent> linked; 

    public ComponentLinkerTest() 
    { 
     super(); 
     linked = new HashMap<JComponent, JComponent>(); 
    } 

    public void link (JComponent c1, JComponent c2) 
    { 
     linked.put (c1, c2); 
     repaint(); 
    } 

    protected void paintComponent (Graphics g) 
    { 
     Graphics2D g2d = (Graphics2D) g; 
     g2d.setRenderingHint (RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); 

     g2d.setPaint (Color.BLACK); 
     for (JComponent c1 : linked.keySet()) 
     { 
      Point p1 = getRectCenter (getBoundsInWindow (c1)); 
      Point p2 = getRectCenter (getBoundsInWindow (linked.get (c1))); 
      g2d.drawLine (p1.x, p1.y, p2.x, p2.y); 
     } 
    } 

    private Point getRectCenter (Rectangle rect) 
    { 
     return new Point (rect.x + rect.width/2, rect.y + rect.height/2); 
    } 

    private Rectangle getBoundsInWindow (Component component) 
    { 
     return getRelativeBounds (component, getRootPaneAncestor (component)); 
    } 

    private Rectangle getRelativeBounds (Component component, Component relativeTo) 
    { 
     return new Rectangle (getRelativeLocation (component, relativeTo), 
       component.getSize()); 
    } 

    private Point getRelativeLocation (Component component, Component relativeTo) 
    { 
     Point los = component.getLocationOnScreen(); 
     Point rt = relativeTo.getLocationOnScreen(); 
     return new Point (los.x - rt.x, los.y - rt.y); 
    } 

    private JRootPane getRootPaneAncestor (Component c) 
    { 
     for (Container p = c.getParent(); p != null; p = p.getParent()) 
     { 
      if (p instanceof JRootPane) 
      { 
       return (JRootPane) p; 
      } 
     } 
     return null; 
    } 

    public boolean contains (int x, int y) 
    { 
     return false; 
    } 

    private static ComponentLinkerTest linker; 

    public static void main (String[] args) 
    { 
     setupLookAndFeel(); 

     JFrame frame = new JFrame(); 

     linker = new ComponentLinkerTest(); 
     frame.setGlassPane (linker); 
     linker.setVisible (true); 

     JPanel content = new JPanel(); 
     content.setLayout (new GridLayout (10, 5, 5, 5)); 
     content.setBorder (BorderFactory.createEmptyBorder (5, 5, 5, 5)); 
     frame.add (content); 

     for (int i = 0; i < 50; i++) 
     { 
      final JButton button = new JButton ("Button" + i); 
      button.addActionListener (new ActionListener() 
      { 
       public void actionPerformed (ActionEvent e) 
       { 
        link (button); 
       } 
      }); 
      content.add (button); 
     } 

     frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); 
     frame.pack(); 
     frame.setLocationRelativeTo (null); 
     frame.setVisible (true); 
    } 

    private static JButton last = null; 

    private static void link (JButton button) 
    { 
     if (last == null) 
     { 
      last = button; 
     } 
     else 
     { 
      linker.link (last, button); 
      last = null; 
     } 
    } 

    private static void setupLookAndFeel() 
    { 
     try 
     { 
      UIManager.setLookAndFeel (UIManager.getSystemLookAndFeelClassName()); 
     } 
     catch (ClassNotFoundException e) 
     { 
      e.printStackTrace(); 
     } 
     catch (InstantiationException e) 
     { 
      e.printStackTrace(); 
     } 
     catch (IllegalAccessException e) 
     { 
      e.printStackTrace(); 
     } 
     catch (UnsupportedLookAndFeelException e) 
     { 
      e.printStackTrace(); 
     } 
    } 
} 

而結果：
（只需點擊任意兩個按鈕，一個又一個，他們將得到鏈接）

PS爲了使線條更粗，您可以在塗漆時更改筆劃：

g2d.setStroke (new BasicStroke (5f));