Question

我试图为JSlider制作一个非线性比例，但是，我目前使用的比例差距很大，这使得它不太理想。

这是因为我设置分区的方式。例如，当滑块位于300时，精度为1661，但当滑块位于301时，精度为9192。

是否有办法在不增加额外范围的情况下缩小间隙。例如，没有做很多

else if(temp > 150 && temp <= 250)
    accuracy = (int) Math.pow((double) accSlide.getValue(), 1.2);

修改
这个JSlider的目的是在数字之间有3到4个不同的加速部分。例如

Section 1 (First quarter of JSlider) : 0-150
Section 2 (Second quarter of JSlider): 150-10000
Section 3 (Third quarter of JSlider) : 10000-100000
Section 4 (Final quarter of JSlider) : 100000-1000000

稍后将在程序的不同函数中使用此accuracy变量。在以下简短代码示例中，它显示为更新JLabel。使用JSlider

实现此目标的最佳方法是什么？

SSCCE / MCVE

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

@SuppressWarnings("serial")
public class Slider extends JFrame {
private int accuracy = 150;
    private Slider() {
        super("Slider");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        createLayout();
        setSize(400, 100);
        setLocationRelativeTo(null);
        setVisible(true);
    }

    private void createLayout() {
        JPanel rootPanel = new JPanel();

        JLabel acc = new JLabel("Accuracy: " + accuracy);
        JSlider accSlide = new JSlider(1, 1000, accuracy);

        accSlide.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent arg0) {
                int temp = accSlide.getValue();
                if(temp <= 150)
                    accuracy = accSlide.getValue();
                else if(temp > 150 && temp <= 300)
                    accuracy = (int) Math.pow((double) accSlide.getValue(), 1.3);
                else if(temp > 300 && temp <= 600)
                    accuracy = (int) Math.pow((double) accSlide.getValue(), 1.6);
                else if(temp > 600 && temp <= 1000)
                    accuracy = (int) Math.pow((double) accSlide.getValue(), 2);
                acc.setText("Accuracy: " + accuracy);
            }
        });
        rootPanel.add(acc);
        rootPanel.add(accSlide, "grow");

        add(rootPanel);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> new Slider());
    }
}

Answer 1

有一些简单的方法可以做到这一点，但重要的是从前一个范围的最大值开始; e.g。

        public void stateChanged(ChangeEvent arg0) {
            int temp = accSlide.getValue();
            double max=0;
            if(temp <= 150)
                accuracy = accSlide.getValue();
            else if(temp <= 300)
                accuracy = (int) (150+2*(accSlide.getValue()-150));
           else if(temp <= 600)
                accuracy = (int) (150+2*(300-150)+3*(accSlide.getValue()-300));
            else
                accuracy = (int) ( (150+2*(300-150)+3*(600-300))+4*(accSlide.getValue()-600));
           acc.setText("i " + temp+" Accuracy: " + accuracy);
        }
    });

或

        public void stateChanged(ChangeEvent arg0) {
            int temp = accSlide.getValue();
            double max=0;
            if(temp <= 150)
                accuracy = accSlide.getValue();
            else if(temp <= 300) {
                max=150;
                accuracy = (int) (max+2*(accSlide.getValue()-150));
           }
           else if(temp <= 600) {
                max=150+2*(300-150);
                accuracy = (int) (max+3*(accSlide.getValue()-300));
           }
            else {
                max=150+2*(300-150)+3*(600-300);
                accuracy = (int) ( (max+4*(accSlide.getValue()-600));
           acc.setText("i " + temp+" Accuracy: " + accuracy);
        }
    });

对于一系列斜率较高的线。

或者你的例子：

            if(temp <= 150)
                accuracy = accSlide.getValue();
              else if(temp <= 300)
                accuracy = (int) (150+Math.pow(accSlide.getValue()-150, 1.3));
           else if(temp <= 600)
                accuracy = (int) (150+Math.pow(300-150, 1.3)+Math.pow((double) accSlide.getValue()-300, 1.6));
            else
                accuracy = (int) ( (150+Math.pow(300-150, 1.3)+Math.pow(600-300, 1.6))+Math.pow((double) accSlide.getValue()-600, 2));
            acc.setText("i " + temp+" Accuracy: " + accuracy);

为JSlider创建非线性比例

1 个答案: