Java JButton Settings setScaledIcon(final AbstractButton button, final ImageIcon icon, final int orientation, final double scale)

Description

Sets the button's default icon, scales it to a given factor of the button's preferred size and aligns it to the given orientation.

License

Creative Commons License

Parameter

Parameter	Description
button	The button.
icon	The icon.
orientation	Either <code>SwingConstants.HORIZONTAL</code> or <code>SwingConstants.VERTICAL</code>.
scale	The scale of the icon.

Declaration

public static void setScaledIcon(final AbstractButton button, final ImageIcon icon, final int orientation,
        final double scale) 

Method Source Code

//package com.java2s;
//License from project: Creative Commons License 

import java.awt.Dimension;
import java.awt.Image;
import java.awt.Insets;

import javax.swing.AbstractButton;

import javax.swing.ImageIcon;
import javax.swing.SwingConstants;

public class Main {
    /**//from   w w  w  .j a v  a 2 s  . c  o  m
    Sets the button's default icon,
     scales it to a given factor of the button's preferred size and
     aligns it to the given orientation.
        
    Use with care:
        
    <pre>
    Helpers.setScaledIcon(new JButton("Example"), new ImageIcon("example.png"), SwingConstants.VERTICAL, 0.5);
    </pre>
        
    @param button The button.
    @param icon The icon.
    @param orientation Either <code>SwingConstants.HORIZONTAL</code> or <code>SwingConstants.VERTICAL</code>.
    @param scale The scale of the icon.
    **/
    public static void setScaledIcon(final AbstractButton button, final ImageIcon icon, final int orientation,
            final double scale) {
        final Dimension preferredSize = button.getPreferredSize();
        final Insets margin = button.getMargin();
        final int minimumSize = Math.min(preferredSize.width - margin.left - margin.right,
                preferredSize.height - margin.top - margin.bottom);
        int size = minimumSize;
        final double actualScale = Math.abs(scale);
        if (actualScale != 1) {
            final double scaledSize = actualScale * size;
            if (scaledSize <= Integer.MAX_VALUE)
                size = (int) scaledSize;
        }
        final Image image = icon.getImage().getScaledInstance(size, size, Image.SCALE_SMOOTH);
        button.setIcon(new ImageIcon(image));
        switch (orientation) {
        case SwingConstants.HORIZONTAL:
            button.setVerticalTextPosition(SwingConstants.CENTER);
            button.setHorizontalTextPosition(SwingConstants.TRAILING);
            break;
        case SwingConstants.VERTICAL:
            button.setVerticalTextPosition(SwingConstants.BOTTOM);
            button.setHorizontalTextPosition(SwingConstants.CENTER);
            break;
        default:
            throw new IllegalArgumentException();
        }
    }

    /**
    Sets the button's default icon,
     scales it to the button's preferred size and
     aligns it to the given orientation.
        
    Use with care:
        
    <pre>
    Helpers.setScaledIcon(new JButton("Example"), new ImageIcon("example.png"), SwingConstants.VERTICAL);
    </pre>
        
    @param button The button.
    @param icon The icon.
    @param orientation Either <code>SwingConstants.HORIZONTAL</code> or <code>SwingConstants.VERTICAL</code>.
    **/
    public static void setScaledIcon(final AbstractButton button, final ImageIcon icon, final int orientation) {
        setScaledIcon(button, icon, orientation, 1);
    }
}

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7. setSelectedButton(ButtonGroup group, int index)
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