package com.vci.client.portal.Formdesign;
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import java.awt.AlphaComposite;
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import java.awt.Component;
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import java.awt.Graphics;
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import java.awt.Graphics2D;
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import java.awt.Image;
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import java.awt.Point;
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import java.awt.event.MouseEvent;
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import java.awt.event.MouseListener;
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import java.awt.event.MouseMotionListener;
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import java.awt.image.BufferedImage;
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import javax.swing.JComponent;
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import javax.swing.JFrame;
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import javax.swing.JPanel;
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import javax.swing.SwingUtilities;
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import com.vci.client.portal.Formdesign.object.ObjectUtil;
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/**
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* 实现组件拖拽的类
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*
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* 参考swing hacks
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*
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* @author liudi
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*
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*/
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public class ControlDragManager extends Object {
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private JFrame frame;
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private JComponent target;
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private ControlGhostGlassPane glass = null;
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private Component dragSource;
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public static final Image right_img = ObjectUtil.getImage("right.png");
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public static final Image wrong_img = ObjectUtil.getImage("wrong.png");
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/**
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* @param frame
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* 参数frame为要实现拖拽的frame，frame中一定只能有一个DragManage对象 ， <br>
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* 如果有多个，就会导致冲突。 <br>
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* 如果该窗口要实现拖拽功能，必须有一个DragManage对象，<br>
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*
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* @param target
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* 拖拽目标
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*/
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public ControlDragManager(JFrame frame, JComponent target) {
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this.frame = frame;
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this.target = target;
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// target.setLayout(null);
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this.frame.setGlassPane(this.glass = new ControlGhostGlassPane());
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}
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/**
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* 指定能拖拽的组件
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*
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*
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* @param souce
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* 被拖拽的组件
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*/
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public void canDrag(Component source) {
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DragAction action = null;
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action = new DragAction(glass, target);
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source.addMouseListener(action);
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source.addMouseMotionListener(action);
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dragSource = source;
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}
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/**
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* 返回拖拽源对象
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*
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* @return
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*/
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public Component getDragSource() {
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return dragSource;
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}
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/**
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* 用来画图形做跨组件的视觉效果的面板
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*
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*
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*/
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static class ControlGhostGlassPane extends JPanel {
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private static final long serialVersionUID = 1L;
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private AlphaComposite composite;
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private BufferedImage dragged = null;
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private int state;
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private Point location = new Point(0, 0);
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public static final int STATE_ACCEPT = 1;
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public static final int STATE_UNACCEPT = 2;
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public static final int STATE_NOMAR = -1;
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public ControlGhostGlassPane() {
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setOpaque(false);
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// 半透明效果
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composite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
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0.5f);
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}
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public void setState(int state) {
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this.state = state;
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}
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public void setImage(BufferedImage dragged) {
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this.dragged = dragged;
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}
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public void setPoint(Point location) {
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this.location = location;
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}
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public void paintComponent(Graphics g) {
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if (dragged == null) {
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return;
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}
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// 在蒙版上画图
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int x = (int) (location.getX() - (dragged.getWidth(this) / 2));
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int y = (int) (location.getY() - (dragged.getHeight(this) / 2));
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Graphics2D g2 = (Graphics2D) g;
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g2.setComposite(composite);
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g2.drawImage(dragged, x, y, null);
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switch (state) {
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case STATE_ACCEPT:
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g2.drawImage(right_img, x + dragged.getWidth(this), y, this);
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break;
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case STATE_UNACCEPT:
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g2.drawImage(wrong_img, x + dragged.getWidth(this), y, this);
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break;
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case STATE_NOMAR:
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break;
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}
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}
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}
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/**
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* 拖拽动作
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*
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* @author liudi
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*
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*/
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class DragAction implements MouseMotionListener, MouseListener {
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private ControlGhostGlassPane glassPane;
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private JComponent targetComp;
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private boolean flag;
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public DragAction(ControlGhostGlassPane glassPane, JComponent targetComp) {
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this.glassPane = glassPane;
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this.targetComp = targetComp;
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flag = false;
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}
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public void mouseDragged(MouseEvent e) {
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flag = true;
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Component c = e.getComponent();
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Point p = (Point) e.getPoint().clone();
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SwingUtilities.convertPointToScreen(p, c);
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Point eventPoint = (Point) p.clone();
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SwingUtilities.convertPointFromScreen(p, glassPane);
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// 鼠标是否在目标控件的上方
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SwingUtilities.convertPointFromScreen(eventPoint, targetComp);
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int state = targetComp.contains(eventPoint) ? ControlGhostGlassPane.STATE_ACCEPT
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: ControlGhostGlassPane.STATE_UNACCEPT;
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glassPane.setState(state);
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glassPane.setPoint(p);
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glassPane.repaint();
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}
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public void mouseMoved(MouseEvent e) {
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}
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public void mouseClicked(MouseEvent e) {
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}
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public void mouseEntered(MouseEvent e) {
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}
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public void mouseExited(MouseEvent e) {
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}
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public void mousePressed(MouseEvent e) {
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flag = false;
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Component c = e.getComponent();
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BufferedImage image = new BufferedImage(c.getWidth(),
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c.getHeight(), BufferedImage.TYPE_INT_ARGB);
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Graphics g = image.getGraphics();
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c.paint(g);
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glassPane.setVisible(true);
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Point p = (Point) e.getPoint().clone();
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SwingUtilities.convertPointToScreen(p, c);
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SwingUtilities.convertPointFromScreen(p, glassPane);
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glassPane.setPoint(p);
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// glassPane.setImage(image);
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glassPane.repaint();
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}
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public void mouseReleased(MouseEvent e) {
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if (!flag) {
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glassPane.setImage(null);
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glassPane.repaint();
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glassPane.setVisible(false);
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glassPane.setImage(null);
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return;
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}
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ControlDragManager.this.dragSource = null;
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System.gc();
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final Component c = e.getComponent();
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final Point p = (Point) e.getPoint().clone();
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SwingUtilities.convertPointToScreen(p, c);
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final Point eventPoint = (Point) p.clone();
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SwingUtilities.convertPointFromScreen(p, glassPane);
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SwingUtilities.convertPointFromScreen(eventPoint, targetComp);
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glassPane.setPoint(p);
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glassPane.repaint();
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/*
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* 移动控件有一下几种情况
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*
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* 1、控件在原来的位置之上，没动
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*
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* 2、控件从原来的位置移动到目标控件的位置
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*
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* 3、控件已经在目标的位置上，然后自动在目标的位置
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*
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* 4、控件在目标的位置上移动的其他控件上
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*/
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// 还没有进入目标组件
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if (!c.getParent().equals(targetComp)
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&& !targetComp.contains(eventPoint)) {
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new Thread(new Runnable() {
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public void run() {
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// 没有接受
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glassPane.setState(ControlGhostGlassPane.STATE_NOMAR);
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// 拿到组件的原始位置
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Point cp = (Point) c.getLocationOnScreen().clone();
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// 转成glass位置
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SwingUtilities.convertPointFromScreen(cp, glassPane);
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// 当前组件在glass上的位置
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int x = cp.x;
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int y = cp.y;
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// 拿到当前显示的图片的位置
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int cx = p.x - (c.getWidth() / 2);
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int cy = p.y - (c.getHeight() / 2);
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int subX = (x - cx) / 10;
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int subY = (y - cy) / 10;
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x = p.x - (c.getWidth() / 2);
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y = p.y - (c.getHeight() / 2);
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for (int i = 0; i < 11; i++) {
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x += subX;
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y += subY;
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if (i == 10) {
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x = cp.x;
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y = cp.y;
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}
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cx = x + (c.getWidth() / 2);
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cy = y + (c.getHeight() / 2);
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glassPane.setPoint(new Point(cx, cy));
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glassPane.repaint();
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try {
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Thread.sleep(20);
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} catch (Exception e2) {
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e2.printStackTrace();
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}
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}
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glassPane.setVisible(false);
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glassPane.setImage(null);
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}
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}).start();
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return;
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}
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// 移动到目标的位置
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if (!c.getParent().equals(targetComp)
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&& targetComp.contains(eventPoint)) {
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// 复制出新的组件
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Component obj = (Component) ObjectUtil.cloneObject(c);
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// 让他能拖动
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ControlDragManager.this.canDrag(obj);
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// 添加到目标位置
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targetComp.add(obj);
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Point p2 = (Point) e.getPoint().clone();
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SwingUtilities.convertPointToScreen(p2, c);
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SwingUtilities.convertPointFromScreen(p2, targetComp);
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int x = p2.x - obj.getWidth() / 2;
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int y = p2.y - obj.getHeight() / 2;
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obj.setLocation(x, y);
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targetComp.repaint();
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targetComp.updateUI();
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glassPane.setVisible(false);
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glassPane.setImage(null);
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return;
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}
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// 控件已经在目标的位置上，然后自动在目标的位置
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if (c.getParent().equals(targetComp)
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&& targetComp.contains(eventPoint)) {
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Point p2 = (Point) e.getPoint().clone();
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SwingUtilities.convertPointToScreen(p2, c);
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SwingUtilities.convertPointFromScreen(p2, targetComp);
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int x = p2.x - c.getWidth() / 2;
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int y = p2.y - c.getHeight() / 2;
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c.setLocation(x, y);
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targetComp.repaint();
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glassPane.setVisible(false);
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glassPane.setImage(null);
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return;
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}
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// 控件在目标的位置上移动的其他控件上
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if (c.getParent().equals(targetComp)
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&& !targetComp.contains(eventPoint)) {
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// 没有接受
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glassPane.setState(ControlGhostGlassPane.STATE_NOMAR);
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// 这里记录图形的
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new Thread(new Runnable() {
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public void run() {
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// 组件在glass上的位置
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Point cp = (Point) c.getLocationOnScreen().clone();
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// 转成glass位置
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SwingUtilities.convertPointFromScreen(cp, glassPane);
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// 拿到组件的位置
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int x = cp.x;
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int y = cp.y;
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// 拿到当前鼠标的位置
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int cx = eventPoint.x;
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int cy = eventPoint.y;
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int subX = (x - cx) / 10;
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int subY = (y - cy) / 10;
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x = eventPoint.x;
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y = eventPoint.y;
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for (int i = 0; i < 11; i++) {
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x += subX;
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y += subY;
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if (i == 10) {
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x = cp.x;
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y = cp.y;
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}
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cx = x + (c.getWidth() / 2);
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cy = y + (c.getHeight() / 2);
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glassPane.setPoint(new Point(cx, cy));
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glassPane.repaint();
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try {
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Thread.sleep(20);
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} catch (Exception e2) {
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e2.printStackTrace();
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}
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}
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glassPane.setVisible(false);
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glassPane.setImage(null);
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}
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}).start();
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}
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}
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}
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}
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