java - 滑动任何 JPanel

Question

我正在尝试创建一个通用类来滑动两个任意相同大小的 JPanel，但是当我使用它时，滑动的 JPanel 就消失了。我还注意到，JPanel“innerPanel”的宽度正在从 400,200 重置(当传输 200,200 面板时)，线程启动后大小将重置为 200,200

package org.chimeras1684.ui.panels;

import java.awt.Point;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JViewport;

/**
 *
 * @author Arhowk
 */
public final class Transistor extends javax.swing.JFrame {

/**
 * Creates new form test
 */
public enum TDirection{
    MOVING_TO_LEFT,
    MOVING_TO_RIGHT,
    MOVING_TO_TOP,
    MOVING_TO_BOTTOM;
}
private static Transistor instance;
static{
    instance = new Transistor();
}
public static Transistor getInstance(){
    return instance;
}
private Transistor() {
    initComponents();
    setVisible(true);
    slide(TDirection.MOVING_TO_TOP, this, jPanel2, jPanel1);
}

public void slide(final TDirection dir, final JFrame root, final JPanel in, final JPanel out){
    if(in.getSize().height != out.getSize().height ||  out.getSize().width != in.getSize().width ){
        throw new IllegalArgumentException("Dimension in is not equal to dimension of out");
    }
    panelTL.removeAll();
    panelBL.removeAll();
    panelBR.removeAll();
    panelTR.validate();
    panelTR.repaint();
    panelTL.validate();
    panelTL.repaint();
    panelBR.validate();
    panelBR.repaint();
    panelBL.validate();
    panelBL.repaint();
    final double width = in.getSize().width;
    final double height = in.getSize().height;

    int x = out.getLocation().x;
    int y = out.getLocation().y;

    final double speedWidthModifier = (dir == TDirection.MOVING_TO_LEFT) ? -1 : (dir == TDirection.MOVING_TO_RIGHT) ? 1 : 0;
    final double speedHeightModifier = (dir == TDirection.MOVING_TO_BOTTOM) ? -1 : (dir == TDirection.MOVING_TO_TOP) ? 1 : 0;

    final double xAtEnd = (dir == TDirection.MOVING_TO_RIGHT) ? width : 0;
    final double yAtEnd = (dir == TDirection.MOVING_TO_BOTTOM) ? height : 0;

    if(dir == TDirection.MOVING_TO_LEFT){
        panelTR.setSize(200,200);
        panelTL.setSize(200,200);
        panelTL.add(in);
        panelTR.add(out);
    }
    if(dir == TDirection.MOVING_TO_RIGHT){
        panelTR.setSize(200,200);
        panelTL.setSize(200,200);
        panelTL.add(out);
        panelTR.add(in);
    }
    if(dir == TDirection.MOVING_TO_BOTTOM){
        panelBL.setSize(200,200);
        panelTL.setSize(200,200);
        panelBL.add(in);
        panelTL.add(out);
    }
    if(dir == TDirection.MOVING_TO_TOP){
        panelBL.setSize(200,200);
        panelTL.setSize(200,200);
        panelBL.add(out);
        panelTL.add(in);
    }
    root.remove(out);
    scrollPanel.setSize(in.getSize());
    innerPanel.setSize(in.getSize().width * 2, in.getSize().height);
    root.add(scrollPanel);
    scrollPanel.setLocation(x, y);
    if(speedWidthModifier == 0 && speedHeightModifier == 0){
        throw new NullPointerException("TDirection dir");
    }
    System.out.println(new Date());
            System.out.println("tlsize1: " + panelTL.getSize());

    (new Timer()).schedule(new TimerTask(){
        @Override
        public void run() {
            System.out.println("tlsize1: " + panelTL.getSize());
    System.out.println(new Date());

            Point viewport = scrollPanel.getViewport().getViewPosition();
            JViewport newViewport = scrollPanel.getViewport();

            double currentX = viewport.x;
            double currentY = viewport.y;   

            double speed = 50;

            double newX = currentX + (speed * speedWidthModifier);
            double newY = currentY + (speed * speedHeightModifier);

            newViewport.getViewPosition().x = (int)newX;
            newViewport.getViewPosition().y = (int)newY;

            if((xAtEnd != 0 && newX > xAtEnd) || (yAtEnd != 0 && newY > yAtEnd)){
                this.cancel();
            }

            root.repaint();
            System.out.println("tlsize2: " + panelTL.getSize());
        }

    }, 0,25);
}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {
    java.awt.GridBagConstraints gridBagConstraints;

    scrollPanel = new javax.swing.JScrollPane();
    innerPanel = new javax.swing.JPanel();
    panelTL = new javax.swing.JPanel();
    panelTR = new javax.swing.JPanel();
    panelBL = new javax.swing.JPanel();
    panelBR = new javax.swing.JPanel();
    jPanel1 = new javax.swing.JPanel();
    jPanel2 = new javax.swing.JPanel();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    scrollPanel.setBorder(null);
    scrollPanel.setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    scrollPanel.setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);

    innerPanel.setBackground(new java.awt.Color(255, 0, 153));
    innerPanel.setLayout(new java.awt.GridBagLayout());

    panelTL.setAutoscrolls(true);
    panelTL.setPreferredSize(new java.awt.Dimension(0, 0));

    javax.swing.GroupLayout panelTLLayout = new javax.swing.GroupLayout(panelTL);
    panelTL.setLayout(panelTLLayout);
    panelTLLayout.setHorizontalGroup(
        panelTLLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );
    panelTLLayout.setVerticalGroup(
        panelTLLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstraints.gridx = 0;
    gridBagConstraints.gridy = 0;
    innerPanel.add(panelTL, gridBagConstraints);

    panelTR.setPreferredSize(new java.awt.Dimension(0, 0));

    javax.swing.GroupLayout panelTRLayout = new javax.swing.GroupLayout(panelTR);
    panelTR.setLayout(panelTRLayout);
    panelTRLayout.setHorizontalGroup(
        panelTRLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );
    panelTRLayout.setVerticalGroup(
        panelTRLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstraints.gridx = 1;
    gridBagConstraints.gridy = 0;
    innerPanel.add(panelTR, gridBagConstraints);

    panelBL.setPreferredSize(new java.awt.Dimension(0, 0));

    javax.swing.GroupLayout panelBLLayout = new javax.swing.GroupLayout(panelBL);
    panelBL.setLayout(panelBLLayout);
    panelBLLayout.setHorizontalGroup(
        panelBLLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );
    panelBLLayout.setVerticalGroup(
        panelBLLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstraints.gridx = 0;
    gridBagConstraints.gridy = 1;
    innerPanel.add(panelBL, gridBagConstraints);

    panelBR.setBackground(new java.awt.Color(204, 0, 51));
    panelBR.setPreferredSize(new java.awt.Dimension(0, 0));

    javax.swing.GroupLayout panelBRLayout = new javax.swing.GroupLayout(panelBR);
    panelBR.setLayout(panelBRLayout);
    panelBRLayout.setHorizontalGroup(
        panelBRLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );
    panelBRLayout.setVerticalGroup(
        panelBRLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 100, Short.MAX_VALUE)
    );

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstraints.gridx = 1;
    gridBagConstraints.gridy = 1;
    innerPanel.add(panelBR, gridBagConstraints);

    scrollPanel.setViewportView(innerPanel);

    jPanel1.setBackground(new java.awt.Color(204, 153, 0));

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 200, Short.MAX_VALUE)
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 200, Short.MAX_VALUE)
    );

    jPanel2.setBackground(new java.awt.Color(255, 255, 0));

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 200, Short.MAX_VALUE)
    );
    jPanel2Layout.setVerticalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 200, Short.MAX_VALUE)
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addComponent(scrollPanel, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(109, 109, 109)
            .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(0, 90, Short.MAX_VALUE))
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(78, 78, 78))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(scrollPanel, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(35, 35, 35))
    );

    pack();
}// </editor-fold>                        

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(Transistor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(Transistor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(Transistor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(Transistor.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Transistor().setVisible(true);
        }
    });
}
// Variables declaration - do not modify                     
private javax.swing.JPanel innerPanel;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel panelBL;
private javax.swing.JPanel panelBR;
private javax.swing.JPanel panelTL;
private javax.swing.JPanel panelTR;
private javax.swing.JScrollPane scrollPanel;
// End of variables declaration                   
}

是的，我知道该类扩展了 JFrame，我只是将其用于测试目的。 (我也不知道如何修复此页面上的缩进)

Answer 1

Swing 中的组件通常受布局管理器的控制。为了实现您想要做的事情，您实际上最好创建一个动 Canvas 局管理器。

我建议你看一下...

• The Universal Tween Engine
• Sliding layout

您还可以查看Animations when using Gridbag Layout. (无耻插件)