关于可视化编程软件的开发！

Question

“拖动控件”是个假象，判断“拖动”的坐标，在设计区域就可以相应你自己写的package.我是这样用过，不知道适合不适合你。

Answer 1

JasperEdit是一个for JasperReport的报表编辑器，支持控件的拖动。自己到sourceforge去down一个下来，看看人家是怎么实现的吧。

Answer 2

Schlemiel(维特根斯坦的扇子)
""sourceforge"是什么啊？

Answer 3

pxboy(阿土仔) 
具体点啊

Answer 4

我没事做的一个玩意，希望对你有帮助import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.border.*;public class DragFrame
        extends JFrame
{
      public JPanel jPanel;      Component selected = null;      public DragFrame()
      {
            try
            {
                  jbInit();
            }
            catch (Exception e)
            {
                  e.printStackTrace();
            }
      }
      public static void main(String[] args)
      {
            DragFrame dragFrame = new DragFrame();
            dragFrame.setSize(500, 500);
            dragFrame.setVisible(true);
            dragFrame.jPanel.repaint();
      }
      private void jbInit() throws Exception
      {
            JTextField t1 = new JTextField();
            t1.setEditable(false);
            Border border1 = BorderFactory.createEtchedBorder(Color.white, new Color(178, 178, 178));
            t1.setBackground(Color.white);
            t1.setBorder(border1);
            t1.setText("文本输入框");
            t1.setName("JTextField");
            t1.setBounds(new Rectangle(259, 131, 75, 25));            JButton b1 = new JButton()
            {
                  Image image = Toolkit.getDefaultToolkit().createImage(DragFrame.class.getResource("resource/plus.gif"));                  public void paint(Graphics g)
                  {
                        g.setColor(new Color(178, 178, 178));
                        g.draw3DRect(0, 0, this.getWidth() - 1, this.getHeight() - 1, false);
                        g.drawImage(image, 0, 0, this.getWidth(), this.getHeight(), null);
                  }
            };
            Image image = Toolkit.getDefaultToolkit().createImage(DragFrame.class.getResource("resource/plus.gif"));
            MediaTracker tracker = new MediaTracker(t1);
            tracker.addImage(image, 0);
            try
            {
                  tracker.waitForID(0);
            }
            catch (InterruptedException e)
            {
                  e.printStackTrace();
            }            b1.setBorder(border1);
            b1.setBackground(SystemColor.control);
            b1.setHorizontalAlignment(JTextField.CENTER);
            b1.setText("按纽");
            b1.setName("JButton");
            b1.setBounds(new Rectangle(278, 185, 75, 25));
            b1.setIcon(common.Transfer.getAppIcon("resource/plus.gif"));            JTextField cb1 = new JTextField();
            cb1.setBorder(border1);
            cb1.setBackground(SystemColor.control);
            cb1.setText("下拉框");
            cb1.setName("JComboBox");
            cb1.setBounds(new Rectangle(146, 303, 75, 25));            MouseAdapter1 mouseAdapter1 = new MouseAdapter1();            t1.addMouseListener(mouseAdapter1);
            t1.addMouseMotionListener(mouseAdapter1);            b1.addMouseListener(mouseAdapter1);
            b1.addMouseMotionListener(mouseAdapter1);            cb1.addMouseListener(mouseAdapter1);
            cb1.addMouseMotionListener(mouseAdapter1);            this.addWindowListener(new java.awt.event.WindowAdapter()
            {
                  public void windowClosing(WindowEvent e)
                  {
                        this_windowClosing(e);
                  }
            });            jPanel = new JPanel()
            {
                  public void paint(Graphics g)
                  {
                        int nStartX = 0, nStartY = 0;
                        int nEndX = 0, nEndY = 0;
                        Component c = null, parent = null;
                        Component components[] = getComponents();                        int nCount = getComponentCount();                        super.paint(g);                        g.setColor(Color.red);
                        for (int i = 1; i < nCount; i++)
                        {
                              c = components[i];
                              parent = components[i - 1];                              nStartX = (int) (c.getLocation().getX() + c.getWidth() / 2);
                              nStartY = (int)c.getLocation().getY();
                              nEndX = (int) (parent.getLocation().getX() + parent.getWidth() / 2);
                              nEndY = (int) (parent.getLocation().getY() + parent.getHeight());                              g.drawLine(nStartX, nStartY - 4, nEndX, nEndY);
                              g.drawOval(nStartX - 2, nStartY - 4, 4, 4);
                        }
                        if (selected != null)
                        {
                              g.setColor(Color.black);
                              g.drawOval(selected.getLocation().x - 1, selected.getLocation().y - 1, 1, 1);
                              g.drawOval(selected.getLocation().x + selected.getWidth() - 1, selected.getLocation().y - 1, 1, 1);
                              g.drawOval(selected.getLocation().x - 1, selected.getLocation().y + selected.getHeight() - 1, 1, 1);
                              g.drawOval(selected.getLocation().x + selected.getWidth() - 1, selected.getLocation().y + selected.getHeight() - 1, 1, 1);
                        }
                  }
            };
            jPanel.setLayout(null);
            jPanel.add(t1);
            jPanel.add(cb1, null);
            jPanel.add(b1);
            JScrollPane jScrollPane1 = new JScrollPane();
            jScrollPane1.getViewport().add(jPanel);
            this.getContentPane().add(jScrollPane1, null);
      }      final static int ADJUST_MOVE = 0;      final static int ADJUST_WEST = 1;      final static int ADJUST_NORTH = 2;      final static int ADJUST_EAST = 3;      final static int ADJUST_SOUTH = 4;      final static int ADJUST_WEST_SOUTH = 5;      final static int ADJUST_WEST_NORTH = 6;      final static int ADJUST_EAST_NORTH = 7;      final static int ADJUST_EAST_SOUTH = 8;      protected int offsetX;      protected int offsetY;      /**
       * current adjust mode of the mouse
       */
      protected int adjustMode = ADJUST_MOVE;      public class MouseAdapter1
              extends MouseAdapter
              implements MouseMotionListener
      {
            public void mousePressed(MouseEvent e)
            {
                  selected = (Component)e.getSource();
                  startAdjust(e);
            }
            public void mouseReleased(MouseEvent e)
            {
                  endAdjust();
            }
            public void mouseDragged(MouseEvent e)
            {
                  adjust(e);
            }
            public void mouseMoved(MouseEvent e)
            {
                  changeCursor(e);
            }
      }

Answer 5

      protected void startAdjust(MouseEvent e)
      {
            offsetX = e.getX();
            offsetY = e.getY();
            if (isEastSouth(e))
            {
                  adjustMode = DragFrame.ADJUST_EAST_SOUTH;
            }
            else if (isEastNorth(e))
            {
                  adjustMode = DragFrame.ADJUST_EAST_NORTH;
            }
            else if (isWestNorth(e))
            {
                  adjustMode = DragFrame.ADJUST_WEST_NORTH;
            }
            else if (isWestSouth(e))
            {
                  adjustMode = DragFrame.ADJUST_WEST_SOUTH;
            }
            else if (isWest(e))
            {
                  adjustMode = DragFrame.ADJUST_WEST;
            }
            else if (isNorth(e))
            {
                  adjustMode = DragFrame.ADJUST_NORTH;
            }
            else if (isEast(e))
            {
                  adjustMode = DragFrame.ADJUST_EAST;
            }
            else if (isSouth(e))
            {
                  adjustMode = DragFrame.ADJUST_SOUTH;
            }
            else
            {
                  adjustMode = DragFrame.ADJUST_MOVE;
            }
      }
      protected void endAdjust()
      {
            adjustMode = DragFrame.ADJUST_MOVE;            /** Reset jPanel's view size and adjust the scroll bar */
            resetPrerredSize();            jPanel.repaint();
      }
      protected void adjust(MouseEvent e)
      {
            Component source = (Component)e.getSource();            int width = source.getWidth();
            int height = source.getHeight();
            int x = source.getLocation().x;
            int y = source.getLocation().y;            int mouseX = (int)e.getX();
            int mouseY = (int)e.getY();            if (adjustMode == DragFrame.ADJUST_EAST_SOUTH)
            {
                  width = mouseX;
                  height = mouseY;
            }
            else if (adjustMode == DragFrame.ADJUST_EAST_NORTH)
            {
                  width = mouseX;
                  height -= mouseY - offsetY;
                  y += mouseY - offsetY;
            }            else if (adjustMode == DragFrame.ADJUST_WEST_NORTH)
            {
                  width -= mouseX - offsetX;
                  height -= mouseY - offsetY;
                  x += mouseX - offsetX;
                  y += mouseY - offsetY;
            }
            else if (adjustMode == DragFrame.ADJUST_WEST_SOUTH)
            {
                  width -= mouseX - offsetX;
                  height = mouseY;
                  x += mouseX - offsetX;
            }            else if (adjustMode == DragFrame.ADJUST_WEST)
            {
                  width -= mouseX - offsetX;
                  x += mouseX - offsetX;
            }
            else if (adjustMode == DragFrame.ADJUST_NORTH)
            {
                  height -= mouseY - offsetY;
                  y += mouseY - offsetY;
            }
            else if (adjustMode == DragFrame.ADJUST_EAST)
            {
                  width = mouseX;
            }
            else if (adjustMode == DragFrame.ADJUST_SOUTH)
            {
                  height = mouseY;
            }
            else if (adjustMode == DragFrame.ADJUST_MOVE)
            {
                  x += mouseX - offsetX;
                  y += mouseY - offsetY;
            }
            else
            {
                  return;
            }            if (width < 40)
            {
                  x = source.getLocation().x;
                  width = 40;
            }
            if (height < 20)
            {
                  y = source.getLocation().y;
                  height = 20;
            }            source.setSize(width, height);
            source.setLocation(x, y);            jPanel.repaint();
      }
      private void resetPrerredSize()
      {
            Component c = null;
            Component components[] = jPanel.getComponents();            int nCount = jPanel.getComponentCount();
            int maxWidth = 0, maxHeight = 0;
            int currentWidth = 0, currentHeight = 0;
            for (int i = 0; i < nCount; i++)
            {
                  c = components[i];
                  currentWidth = (int) (c.getLocation().getX() + c.getWidth());
                  currentHeight = (int) (c.getLocation().getY() + c.getHeight());
                  if (currentWidth > maxWidth)
                  {
                        maxWidth = currentWidth;
                  }
                  if (currentHeight > maxHeight)
                  {
                        maxHeight = currentHeight;
                  }
            }
            jPanel.setPreferredSize(new Dimension(maxWidth + 10, maxHeight + 10));
            Container container = (Container)jPanel.getParent();
            if (container != null)
                  container.validate();
      }
      private void changeCursor(MouseEvent e)
      {
            Component source = (Component)e.getSource();            if (isEastSouth(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR));
            }
            else if (isEastNorth(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.NE_RESIZE_CURSOR));
            }
            else if (isWestNorth(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.NW_RESIZE_CURSOR));
            }
            else if (isWestSouth(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.SW_RESIZE_CURSOR));
            }
            else if (isWest(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
            }
            else if (isNorth(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
            }
            else if (isEast(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR));
            }
            else if (isSouth(e))
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
            }
            else
            {
                  source.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
            }
      }
      private boolean isEast(MouseEvent e)
      {
            return (e.getX() <= ( (Component)e.getSource()).getWidth()
                    && e.getX() > ( (Component)e.getSource()).getWidth() - 4);
      }
      private boolean isSouth(MouseEvent e)
      {
            return (e.getY() <= ( (Component)e.getSource()).getHeight()
                    && e.getY() > ( (Component)e.getSource()).getHeight() - 4);
      }
      private boolean isWest(MouseEvent e)
      {
            return (e.getX() < 4 && e.getX() >= 0);
      }
      private boolean isNorth(MouseEvent e)
      {
            return (e.getY() < 4 && e.getY() >= 0);
      }
      private boolean isEastSouth(MouseEvent e)
      {
            return isEast(e) && isSouth(e);
      }
      private boolean isWestSouth(MouseEvent e)
      {
            return isWest(e) && isSouth(e);
      }
      private boolean isEastNorth(MouseEvent e)
      {
            return isEast(e) && isNorth(e);
      }
      private boolean isWestNorth(MouseEvent e)
      {
            return isWest(e) && isNorth(e);
      }
      private void this_windowClosing(WindowEvent e)
      {
            System.exit(0);
      }}

Answer 6

pxboy(阿土仔):有问题，编译无法通过。D:\java\JCreator Pro\MyProjects\DragFrame\DragFrame.java:75: package common does not exist

Answer 7

b1.setIcon(common.Transfer.getAppIcon("resource/plus.gif"));
这里将icon替换成你自己的，或者注释掉这行，
这种小问题应该自己能解决吧？