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
}
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
}
解决方案 »
- Integer ir=0626; 打印出406 难道是精度丢失?
- 大侠,200分求教用java打印表格的问题?
- eclipse设置的一个小问题
- 请教一个算法:计算N项的Fibonacci数列的和,其中第N项是数列中最大的不超过4百万的数
- XP上可以安装帧中继协议吗?
- 100分求助:Jbuild+oracle用什么连接池呢?
- 目前较好的java开发工具是什么?
- 在一个包中的类要调用同包中的接口和类,编译的时间出现问题,应该怎么解决???
- jtable的问题,分析代码,现场给分
- 我才学java 请问怎样才能快速学会java 一个月够不够?(这是我的最多得分了,下次一定多给)
- 二叉树前序/中序/后序非递归实现
- java程序问题
jsp.setOneTouchExpandable(true);?
正好要做resize panel的东东