bracco23/JAdaptiveLabel.java

## JAdaptiveLabel.java
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Insets;
import java.util.regex.Pattern;
import javax.swing.Icon;
import javax.swing.JLabel;

/**
 *
 * @author bracco23
 */
public class JAdaptiveLabel extends JLabel{

    boolean inizialized = false;

    public JAdaptiveLabel(String text, Icon icon, int horizontalAlignment) {
        super(text, icon, horizontalAlignment);
        inizialized = true;
    }

    public JAdaptiveLabel(String text, int horizontalAlignment) {
        super(text, horizontalAlignment);
        inizialized = true;
    }

    public JAdaptiveLabel(String text) {
        super(text);
        inizialized = true;
    }

    public JAdaptiveLabel(Icon image, int horizontalAlignment) {
        super(image, horizontalAlignment);
        inizialized = true;
    }

    public JAdaptiveLabel(Icon image) {
        super(image);
        inizialized = true;
    }

    public JAdaptiveLabel() {
        super();
        inizialized = true;
    }

    @Override
    public void setText(String text) {
        super.setText(text);
        if (inizialized) {
            adaptFontSize();
        }
    }

    public void adaptFontSize() {
        float xFactor, yFactor;
        Font fontNome = this.getFont();
        Insets ins = this.getInsets();
        FontMetrics metricsNome = this.getFontMetrics(fontNome);
        Dimension lblNomeSize = this.getSize();
        xFactor = ((lblNomeSize.width - ins.left - ins.right) * 0.9f ) / metricsNome.stringWidth(this.getText());
        yFactor = ((lblNomeSize.height - ins.top - ins.bottom) * 0.9f ) / metricsNome.getHeight();
        xFactor = (xFactor != 0 && Math.abs(xFactor - 1)>0.1) ? xFactor : 1;
        yFactor = (yFactor != 0 && Math.abs(xFactor - 1)>0.1) ? yFactor : 1;/**/
        float size = Math.min(xFactor, yFactor) * fontNome.getSize();
        Font newFont = fontNome.deriveFont(size);
        if(Pattern.matches("<html>.*</html>", getText())){
            setText(getText().replaceFirst("size=\"[0-9]*\"", "size=\""+size+'"'));
        }
        this.setFont(newFont);
        invalidate();
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 29 * hash + (this.inizialized ? 1 : 0);
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final JAdaptiveLabel other = (JAdaptiveLabel) obj;
        if (this.inizialized != other.inizialized) {
            return false;
        }
        return true;
    }

}

## test.java
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import net.miginfocom.layout.LayoutUtil;
import net.miginfocom.swing.MigLayout;

/**
 *
 * @author Emiddio
 */
public class Prove {

    static JPanel pane = null;
    static int i = 0, j = 0;

    static boolean CUSTOM = false;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {
        JFrame f = new JFrame();
        LayoutUtil.setGlobalDebugMillis(1000);
        f.setLayout(new MigLayout("fill", "[100%]", "[10%|90%]"));
        JButton b = new JButton("Add");
        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (pane != null) {
                    f.remove(pane);
                }
                pane = new JPanel();
                pane.setLayout(new MigLayout("fill"));

                JPanel pane2 = new JPanel();
                pane2.setLayout(new MigLayout("fill", "[33%|33%|33%]", "[10%|90%]"));

                JLabel l1 = getLabel("a", CUSTOM);
                pane2.add(l1, "cell 0 0, grow");

                JLabel l2 = getLabel("b", CUSTOM);
                pane2.add(l2, "cell 1 0, grow");

                JLabel l3 = getLabel("c", CUSTOM);
                pane2.add(l3, "cell 2 0, grow");

                JPanel pane3 = new JPanel();
                pane3.setLayout(new MigLayout("fill"));
                for (int itemp = i; itemp < i + 5; itemp++) {
                    for (int jtemp = j; jtemp < j + 6; jtemp++) {
                        if (itemp != i || jtemp != j) {
                            pane3.add(getLabel(Integer.toString(itemp + jtemp), CUSTOM), "grow, cell " + itemp + " " + jtemp);
                        }
                    }
                }
                i++;
                j++;

                pane2.add(pane3, "grow, cell 0 1 3 1");
                pane.add(pane2, "grow, cell 0 0");
                f.add(pane, "cell 0 1, grow");
                f.validate();
            }
        });
        f.add(b, "cell 0 0, grow");
        f.setSize(300, 400);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

    public static JLabel getLabel(String s, boolean custom) {
        JLabel l;
        if(custom){
            l =  new JAdaptiveLabel(s);
        }else{
            l = new JLabel(s);
        }
        l.setHorizontalAlignment(JLabel.CENTER);
        return l;
    }

}
	import java.awt.Dimension;
	import java.awt.Font;
	import java.awt.FontMetrics;
	import java.awt.Insets;
	import java.util.regex.Pattern;
	import javax.swing.Icon;
	import javax.swing.JLabel;

	/**
	*
	* @author bracco23
	*/
	public class JAdaptiveLabel extends JLabel{

	boolean inizialized = false;

	public JAdaptiveLabel(String text, Icon icon, int horizontalAlignment) {
	super(text, icon, horizontalAlignment);
	inizialized = true;
	}

	public JAdaptiveLabel(String text, int horizontalAlignment) {
	super(text, horizontalAlignment);
	inizialized = true;
	}

	public JAdaptiveLabel(String text) {
	super(text);
	inizialized = true;
	}

	public JAdaptiveLabel(Icon image, int horizontalAlignment) {
	super(image, horizontalAlignment);
	inizialized = true;
	}

	public JAdaptiveLabel(Icon image) {
	super(image);
	inizialized = true;
	}

	public JAdaptiveLabel() {
	super();
	inizialized = true;
	}

	@Override
	public void setText(String text) {
	super.setText(text);
	if (inizialized) {
	adaptFontSize();
	}
	}

	public void adaptFontSize() {
	float xFactor, yFactor;
	Font fontNome = this.getFont();
	Insets ins = this.getInsets();
	FontMetrics metricsNome = this.getFontMetrics(fontNome);
	Dimension lblNomeSize = this.getSize();
	xFactor = ((lblNomeSize.width - ins.left - ins.right) * 0.9f ) / metricsNome.stringWidth(this.getText());
	yFactor = ((lblNomeSize.height - ins.top - ins.bottom) * 0.9f ) / metricsNome.getHeight();
	xFactor = (xFactor != 0 && Math.abs(xFactor - 1)>0.1) ? xFactor : 1;
	yFactor = (yFactor != 0 && Math.abs(xFactor - 1)>0.1) ? yFactor : 1;/**/
	float size = Math.min(xFactor, yFactor) * fontNome.getSize();
	Font newFont = fontNome.deriveFont(size);
	if(Pattern.matches("<html>.*</html>", getText())){
	setText(getText().replaceFirst("size=\"[0-9]*\"", "size=\""+size+'"'));
	}
	this.setFont(newFont);
	invalidate();
	}

	@Override
	public int hashCode() {
	int hash = 5;
	hash = 29 * hash + (this.inizialized ? 1 : 0);
	return hash;
	}

	@Override
	public boolean equals(Object obj) {
	if (this == obj) {
	return true;
	}
	if (obj == null) {
	return false;
	}
	if (getClass() != obj.getClass()) {
	return false;
	}
	final JAdaptiveLabel other = (JAdaptiveLabel) obj;
	if (this.inizialized != other.inizialized) {
	return false;
	}
	return true;
	}

	}
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import javax.swing.JButton;
	import javax.swing.JFileChooser;
	import javax.swing.JFrame;
	import javax.swing.JLabel;
	import javax.swing.JPanel;
	import net.miginfocom.layout.LayoutUtil;
	import net.miginfocom.swing.MigLayout;

	/**
	*
	* @author Emiddio
	*/
	public class Prove {

	static JPanel pane = null;
	static int i = 0, j = 0;

	static boolean CUSTOM = false;

	/**
	* @param args the command line arguments
	*/
	public static void main(String[] args) throws Exception {
	JFrame f = new JFrame();
	LayoutUtil.setGlobalDebugMillis(1000);
	f.setLayout(new MigLayout("fill", "[100%]", "[10%\|90%]"));
	JButton b = new JButton("Add");
	b.addActionListener(new ActionListener() {
	@Override
	public void actionPerformed(ActionEvent e) {
	if (pane != null) {
	f.remove(pane);
	}
	pane = new JPanel();
	pane.setLayout(new MigLayout("fill"));

	JPanel pane2 = new JPanel();
	pane2.setLayout(new MigLayout("fill", "[33%\|33%\|33%]", "[10%\|90%]"));

	JLabel l1 = getLabel("a", CUSTOM);
	pane2.add(l1, "cell 0 0, grow");

	JLabel l2 = getLabel("b", CUSTOM);
	pane2.add(l2, "cell 1 0, grow");

	JLabel l3 = getLabel("c", CUSTOM);
	pane2.add(l3, "cell 2 0, grow");

	JPanel pane3 = new JPanel();
	pane3.setLayout(new MigLayout("fill"));
	for (int itemp = i; itemp < i + 5; itemp++) {
	for (int jtemp = j; jtemp < j + 6; jtemp++) {
	if (itemp != i \|\| jtemp != j) {
	pane3.add(getLabel(Integer.toString(itemp + jtemp), CUSTOM), "grow, cell " + itemp + " " + jtemp);
	}
	}
	}
	i++;
	j++;

	pane2.add(pane3, "grow, cell 0 1 3 1");
	pane.add(pane2, "grow, cell 0 0");
	f.add(pane, "cell 0 1, grow");
	f.validate();
	}
	});
	f.add(b, "cell 0 0, grow");
	f.setSize(300, 400);
	f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	f.setVisible(true);
	}

	public static JLabel getLabel(String s, boolean custom) {
	JLabel l;
	if(custom){
	l = new JAdaptiveLabel(s);
	}else{
	l = new JLabel(s);
	}
	l.setHorizontalAlignment(JLabel.CENTER);
	return l;
	}

	}