java实现控件的移动及使用鼠标改变控件大小
package cn.com.test; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Cursor; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.Label; import java.awt.Point; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.MouseMotionAdapter; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.border.LineBorder; public class testDrap { static int xx , yy; static Point p = new Point(0, 0); static int w,h; static boolean b = true; public static void main(String[] args) { JFrame frame = new JFrame(); frame.getContentPane().setLayout(new FlowLayout()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JPanel panel = new JPanel(); panel.setLayout(new FlowLayout()); panel.setBorder(new LineBorder(Color.black)); panel.setPreferredSize(new Dimension(260,55)); frame.setBounds(100, 100, 450, 300); final JLabel label = new JLabel(){ public void repaint() { this.setLocation(p); this.setSize(w,h); super.repaint(); } }; LineBorder border = new LineBorder(Color.black); label.setBorder(border); label.setForeground(Color.black); label.setPreferredSize(new Dimension(50,30)); label.addMouseListener(new MouseListener() { public void mouseReleased(MouseEvent arg0) { b = false; } public void mousePressed(MouseEvent mouseEvent) { xx = mouseEvent.getX(); yy = mouseEvent.getY(); w = label.getSize().width; h = label.getSize().height; b = true; } public void mouseExited(MouseEvent arg0) { } public void mouseEntered(MouseEvent e) { if (label.getSize().width-8<=e.getX()) { label.setCursor(new Cursor(Cursor.E_RESIZE_CURSOR));//右 } else if (8>=e.getX()) { label.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR));//左 } else { label.setCursor(Cursor.getDefaultCursor()); } } public void mouseClicked(MouseEvent arg0) { } }); label.addMouseMotionListener(new MouseAdapter() { public void mouseMoved(MouseEvent e) { Cursor cursor = label.getCursor(); if (label.getSize().width-5<=e.getX()) { label.setCursor(new Cursor(Cursor.E_RESIZE_CURSOR));//右 } else if (5>=e.getX()) { label.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR));//左 } else { label.setCursor(Cursor.getDefaultCursor()); } if (b) { label.setCursor(cursor); } }; public void mouseDragged(MouseEvent e) { p = label.getLocation(); if (label.getCursor().getType() == Cursor.W_RESIZE_CURSOR) { Point point = label.getLocation(); p.x = e.getPoint().x + point.x - 0; p.y = point.y; label.setLocation(p); w = label.getSize().width - e.getPoint().x; h = label.getSize().height; label.setSize(w,h); } else if (label.getCursor().getType() == Cursor.E_RESIZE_CURSOR) { w = e.getPoint().x; h = label.getSize().height; label.setSize(w,h); label.setLocation(p); } else { Point point = label.getLocation(); ////////////随意移动
//p.x = e.getPoint().x + point.x - xx;
//p.y = e.getPoint().y + point.y - yy; //label.setLocation(e.getPoint().x + point.x - xx,e.getPoint().y + point.y - yy);
////////////沿着X轴方向移动 p.x = e.getPoint().x + point.x - xx; p.y = point.y; label.setLocation(e.getPoint().x + point.x - xx,point.y); } } } ); panel.add(label); frame.add(panel); JButton btn = new JButton("确认"); btn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { for (int i = 0; i < panel.getComponentCount(); i++) { Component c = panel.getComponent(i); System.out.println(c.getLocation().x); } } }); frame.add(btn); frame.setVisible(true); } }
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