自动调整大小的JButton图标 [英] Auto-resizing JButton Icon

问题描述

所以我有向其中添加图标的JButton.图标最初太大，因此我需要预先调整它们的大小，并且效果很好.除了在调整窗口大小时，JButton会更改大小，而图标不会更改，这是有问题的.

so I have this JButtons to which I add Icons. The Icons are too large initially, so I resize them beforehand, and it works fine. Except that when I resize the window, the JButtons change size, but not the Icons, which is problematic.

是否有一种方法可以让Icon仅仅填充它所连接的JButton?一点代码使其更加清晰:

Is there a way to have an Icon just fill the JButton it is attached to? Bit of code to make it clearer:

public JewelClass(){

    setBackground (new Color (30,30,30)); 
    addActionListener(this);
    setLayout(new GridLayout());

    ImageIcon icon = new ImageIcon(src/carre.jpg);
    setIcon (resizeIcon(icon,60,60));

}

resizeIcon是一个个人函数，它接受一个I​​con，一个width参数和一个height参数，并返回一个经过调整大小的Icon(显然). 我尝试更改布局，但没有任何改变.我尝试获取JButton的宽度/高度，但是由于添加Icon时它们尚不存在，因此不起作用.

resizeIcon being a personal function, that takes an Icon, a width parameter and a height parameter, and return a resized Icon (obviously). I tried changing the Layout, but it doesn't change anything. I tried getting the width/height of the JButton, but since they don't exist yet when the Icon is added, it doesn't work.

你们想知道如何解决这个问题吗?只要我的JButton充满了我给它的图像，它就不必是图标，那真是棒极了:)

Would you guys have any idea how to get through this? It doesn't have to be an icon, as long as my JButton is filled with the image I give it, it's awesome :)

谢谢！

推荐答案

在Swing中，您可以将任何JComponent添加到另一个JComponent中，因为Image是JLabel最好的JComponent，那么为什么不呢?将JLabel#setIcon()放入JButton

in Swing you can add any JComponent to the another JComponent, for Image is JLabel the best JComponent, then why not put the JLabel#setIcon() to the JButton

import java.awt.*;
import javax.swing.*;

public class ResizeIconInButton extends JFrame {
    private static final long serialVersionUID = 1L;

    public ResizeIconInButton() {
        JButton myButton = new JButton();
        myButton.setLayout(new BorderLayout());
        myButton.add(new CustomComponents0());
        add(myButton, BorderLayout.CENTER);
        setPreferredSize(getPreferredSize());
        setTitle("Resize Icon In Button");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                ResizeIconInButton main = new ResizeIconInButton();

            }
        };
        javax.swing.SwingUtilities.invokeLater(r);
    }
}

class CustomComponents0 extends JLabel {

    private static final long serialVersionUID = 1L;

    @Override
    public Dimension getMinimumSize() {
        return new Dimension(200, 100);
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(300, 200);
    }

    @Override
    public void paintComponent(Graphics g) {
        int margin = 10;
        Dimension dim = getSize();
        super.paintComponent(g);
        g.setColor(Color.red);
        g.fillRect(margin, margin, dim.width - margin * 2, dim.height - margin * 2);
    }
}

import java.awt.*;
import javax.swing.*;

public class ResizeIconInButton extends JFrame {

    private static final long serialVersionUID = 1L;
    private static final String IMAGE_PATH = "http://duke.kenai.com/misc/Bullfight.jpg";
    private JButton myButton = new JButton();
    private JLabel myLabel = new JLabel();

    public ResizeIconInButton() {
        Icon myIcon = new ImageIcon(IMAGE_PATH);
        myLabel.setIcon(myIcon);
        myButton.setLayout(new BorderLayout());
        myButton.add(myLabel);
        add(myButton, BorderLayout.CENTER);
        setPreferredSize(new Dimension(200, 100));
        setTitle("Resize Icon In Button");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                ResizeIconInButton main = new ResizeIconInButton();
            }
        });
    }
}

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