Java Applet 包装器规模输出

Question

我正在为 Notch 的“Prelude of the Chambered”创建一个包装，我希望制作它以便您可以调整窗口大小。我不知道如何使内容缩放，我尝试覆盖 onPaint。我无法修改 Jar 来完成此任务。

onPaint 尝试:

package com.gudenau.pc.poc;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

import javax.swing.JFrame;

public class JScaledFrame extends JFrame {

    private static final long serialVersionUID = 4044340683411982494L;

    public JScaledFrame(String title) {
        super(title);
    }

    @Override
    public void paint(Graphics graphics){
        Dimension min = getMinimumSize();
        Dimension size = getSize();

        BufferedImage image = new BufferedImage(min.width, min.height, BufferedImage.TYPE_4BYTE_ABGR);
        Graphics subGraphics = image.getGraphics();
        super.paint(subGraphics);
        subGraphics.dispose();

        graphics.drawImage(image, 0, 0, size.width, size.height, null);
    }
}

Answer 1

扩展内容非常困难。您想要的是更改绘制底层组件的 Graphics 上下文的缩放上下文。

通常，您要做的就是覆盖有问题的组件的 paint 方法并应用您想要的缩放因子...

public class MyExtendedClass extends ... {
    @Override
    public void paint(Graphics g) {
        Graphics2D g2d = (Graphics2D)g.create();
        double scaleFactor = 1d;
        // Calculate the scaling factor to apply
        // based on the "default" size and the
        // current size...
        g2d.scale(scaleFactor, scaleFactor);
        super.paint(g2d);
        g2d.dispose();
    }
}

这可能会引入各种怪异现象，坦率地说，更强大的解决方案可能是使用 JXLayer/JLayer，例如......

• Zooming JLayeredPane via JLayer and the LayerUI
• How to add MouseListener to item on Java Swing Canvas

您可能还会发现使用 AffineTransform 更容易...