隣接する2つのラジオボタンをクリックすると、これらのボタンの間に線が引かれます.2つの水平または垂直のラジオボタンが選択されている場合にのみ線が描画される条件をコードに入れます。それ以外の場合はエラーメッセージが表示されます........それは私にとってはうまくいきますが、ランダムに2つのラジオボタンをクリックすると、理解できない例外がスローされます. prog をコンパイルすると表示されます........注: C:\Users\MUHAMMAD Umair\Desktop\ComponentLinkerTest.java は未チェックまたは安全でない操作を使用します。注: 詳細については、-Xlint:unchecked で再コンパイルしてください。
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;
import java.util.Map;
import java.util.*;
/**
* @see http://stackoverflow.com/a/12389479/909085
*/
public class ComponentLinkerTest extends JComponent
{
// private Map<JComponent, JComponent> linked;
Map<JComponent, java.util.List<JComponent> > linked;// = new HashMap<>();
int n=1;
public ComponentLinkerTest ()
{
super ();
linked = new HashMap ();
}
static JRadioButton[] button = new JRadioButton[25];
public void gui()
{
setupLookAndFeel ();
JFrame frame = new JFrame ();
linker = new ComponentLinkerTest ();
frame.setGlassPane ( linker );
linker.setVisible ( true );
JPanel content = new JPanel ();
content.setLayout ( new GridLayout ( 5, 5, 5, 5 ) );
content.setBorder ( BorderFactory.createEmptyBorder ( 5, 5, 5, 5 ) );
frame.add ( content );
int i;
for (i = 0; i < 25; i++ )
{
// final JButton button = new JButton ( "Button" + i );
button[i] = new JRadioButton();
// panel.add(fontButtons[i]);
button[i].addActionListener ( new ActionListener ()
{
public void actionPerformed ( ActionEvent e )
{
link ((JRadioButton) e.getSource() );
}
} );
content.add ( button [i]);
}
frame.setDefaultCloseOperation ( JFrame.EXIT_ON_CLOSE );
frame.pack ();
frame.setLocationRelativeTo ( null );
frame.setVisible ( true );
}
/*public void link ( JComponent c1, JComponent c2 )
{
linked.put ( c1, c2 );
repaint ();
}*/
public void link ( JComponent c1, JComponent c2 )
{
if(linked.containsKey(c1)){
linked.get(c1).add(c2);
}else{
java.util.List<JComponent> list = new LinkedList<>();
list.add(c2);
linked.put ( c1, list );
}
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 ) ) );
/* Stroke stroke = new BasicStroke(8//,
/*BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0,
new float[] { 12, 12 }, 0);
g2d.setStroke(stroke);
g2d.setColor(Color.RED);
g2d.drawLine ( p1.x, p1.y, p2.x, p2.y );
}
}*/
@Override
protected void paintComponent ( Graphics g )
{
super.paintComponent(g);
Graphics2D g2d = ( Graphics2D ) g;
g2d.setRenderingHint ( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
g2d.setPaint ( Color.BLACK );
for ( JComponent c1 : linked.keySet () )
{
for(JComponent c2 : linked.get(c1)){
Point p1 = getRectCenter ( getBoundsInWindow ( c1 ) );
Point p2 = getRectCenter ( getBoundsInWindow ( c2 ) );
/* Stroke stroke = new BasicStroke(8//,
/*BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0,
new float[] { 12, 12 }, 0);
g2d.setStroke(stroke);*/
if(n==1)
{
g2d.setColor(Color.RED);
n=2;
}
else
{
g2d.setColor(Color.BLUE);
n=1;
}
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 )
{
ComponentLinkerTest ct = new ComponentLinkerTest();
ct.gui();
}
private static JRadioButton last = null;
private static void link ( JRadioButton buton )
{
int a=0;
int i;
if ( last == null )
{
last = buton;
System.out.println(last.getX());
}
else
{
for( i=0 ;i<25 ;i++)
{
if(buton == button[i])
{
if(button[i-1] == last || button[i+1]==last || button[i-5] == last || button[i+5]==last)
{
System.out.println("in cond");
linker.link ( last, buton );
buton.setSelected(false);
last.setSelected(false);
last = null;
}
else
{
System.out.println("out cond");
buton.setSelected(false);
last.setSelected(false);
last = null;
JOptionPane.showMessageDialog(null,"Wrong position clicked ");
}
break;
}
else
{
System.out.println("button not found");
}
}
}
}
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 ();
}
}
}