Swing实现鼠标动态调整面板大小
现有一个JPanel中包含两个JScrollPanel，希望通过鼠标拖拽动态地调整两个JScrollPanel的大小，已经实现了鼠标调整功能，但是鼠标响应不是很灵敏，需要拖拽多次才能成功，而且光标经常改变了之后变不回来。请问有什么方法提高界面响应的准确度与灵敏度？十分感谢！
import javax.swing.JFrame;import java.awt.Cursor;import java.awt.Dimension;/** * <p>MouseAdjustFrame.java</p> * <p>Created on May 6, 2009, 2:02:45 PM</p> * <p>Copyright (c) 2007-2009. CUCKOO Workgroup, USTC, P.R.China</p> * @author Ren Jian */public class MouseAdjustFrame extends JFrame { private boolean resizeable = false; /** Creates new form MouseAdjustFrame */ public MouseAdjustFrame() { this.setPreferredSize(new java.awt.Dimension(640, 480)); initComponents(); } /** 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() { mainPanel = new javax.swing.JPanel(); jPanel2 = new javax.swing.JPanel(); jScrollPane1 = new javax.swing.JScrollPane(); jList1 = new javax.swing.JList(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("Mouse Adjust"); mainPanel.setLayout(new java.awt.BorderLayout()); jPanel2.setBackground(new java.awt.Color(255, 255, 255)); jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder("Panel2")); mainPanel.add(jPanel2, java.awt.BorderLayout.CENTER); jScrollPane1.setBorder(javax.swing.BorderFactory.createTitledBorder("Panel1")); jScrollPane1.addMouseListener(new java.awt.event.MouseAdapter() { public void mousePressed(java.awt.event.MouseEvent evt) { jScrollPane1MousePressed(evt); } }); jScrollPane1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() { public void mouseDragged(java.awt.event.MouseEvent evt) { jScrollPane1MouseDragged(evt); } public void mouseMoved(java.awt.event.MouseEvent evt) { jScrollPane1MouseMoved(evt); } }); jList1.setBackground(new java.awt.Color(255, 255, 204)); jList1.setModel(new javax.swing.AbstractListModel() { String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" }; public int getSize() { return strings.length; } public Object getElementAt(int i) { return strings[i]; } }); jScrollPane1.setViewportView(jList1); mainPanel.add(jScrollPane1, java.awt.BorderLayout.NORTH); getContentPane().add(mainPanel, java.awt.BorderLayout.CENTER); pack(); }// </editor-fold> private void jScrollPane1MousePressed(java.awt.event.MouseEvent evt) { int height = evt.getY() - jScrollPane1.getY(); if ((height < jScrollPane1.getHeight() + 3) && (height > jScrollPane1.getHeight() - 3)) { resizeable = true; } else { resizeable = false; } } private void jScrollPane1MouseMoved(java.awt.event.MouseEvent evt) { int height = evt.getY() - jScrollPane1.getY(); if ((height < jScrollPane1.getHeight() + 3) && (height > jScrollPane1.getHeight() - 3)) { this.setCursor(new Cursor(Cursor.S_RESIZE_CURSOR)); } else { this.setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); } } private void jScrollPane1MouseDragged(java.awt.event.MouseEvent evt) { if (resizeable) { jScrollPane1.setSize(new Dimension(jScrollPane1.getWidth(), evt.getY() - jScrollPane1.getY())); jScrollPane1.validate(); jPanel2.setLocation(mainPanel.getX(), evt.getY()); jPanel2.setSize(new Dimension(jPanel2.getWidth(), mainPanel.getHeight() - evt.getY())); } } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new MouseAdjustFrame().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JList jList1; private javax.swing.JPanel jPanel2; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JPanel mainPanel; // End of variables declaration}