jreportpanel.java

iReport-0.4.1-src是iReport的源代码,iReport是一个开源的报表项目,可以生成PDF等格式报表

/*
 * JReportPanel.java
 *
 * iReport  --  Visual designer for generating JasperReports Documents
 *  Copyright (C) 2002-2003  Giulio Toffoli [e-mail]
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  Giulio Toffoli
 *  Via T.Aspetti, 233
 *  35100 Padova ITALY
 *  [e-mail]
 *
 * Created on 13 febbraio 2003, 23.35
 */

package it.businesslogic.ireport.gui;

import java.awt.*;
import java.awt.dnd.*;
import javax.swing.*;
import java.awt.datatransfer.*;

/**
 *
 * @author  Administrator
 */
public class JReportPanel extends JPanel implements java.awt.dnd.DropTargetListener {
    
    private JReportFrame jrf = null;
    /** Creates a new instance of JReportPanel */
    public JReportPanel() {
        this.setBackground(new Color(128,128,128));
        new DropTarget( this, // component
        DnDConstants.ACTION_COPY_OR_MOVE, // actions
         this); // DropTargetListener
         this.setIgnoreRepaint(true);
    }
    
    /** Paints this component.
     * <p>
     * This method is called when the contents of the component should
     * be painted in response to the component first being shown or
     * damage needing repair.  The clip rectangle in the
     * <code>Graphics</code> parameter will be set to the area
     * which needs to be painted.
     * Subclasses of Component that override this method need not call
     * super.paint(g).
     * <p>
     * For performance reasons, Components with zero width or height
     * aren't considered to need painting when they are first shown,
     * and also aren't considered to need repair.
     *
     * @param g the graphics context to use for painting
     * @see       #update
     * @since     JDK1.0
     *
     */
    public void paint(Graphics g){
        
        if (jrf != null){
            jrf.paintReportPanel(g);
        } else {
            super.paint(g);
        }
   
    }
    
    /** Getter for property jrf.
     * @return Value of property jrf.
     *
     */
    public it.businesslogic.ireport.gui.JReportFrame getJrf() {
        return jrf;
    }
    
    /** Setter for property jrf.
     * @param jrf New value of property jrf.
     *
     */
    public void setJrf(it.businesslogic.ireport.gui.JReportFrame jrf) {
        this.jrf = jrf;
    }
    
    public void dragEnter(java.awt.dnd.DropTargetDragEvent dtde) {
        dtde.acceptDrag(dtde.getDropAction());      
    }
    
    public void dragExit(java.awt.dnd.DropTargetEvent dte) {
    }
    
    public void dragOver(java.awt.dnd.DropTargetDragEvent dtde) {
        dtde.acceptDrag(dtde.getDropAction());            
    }
    
    public void drop(java.awt.dnd.DropTargetDropEvent dtde) {
       try {
           
        DropTargetContext context = dtde.getDropTargetContext();

        Transferable tr = dtde.getTransferable();
        
        DataFlavor[] df = tr.getTransferDataFlavors();
        
        
        if (df[0].getHumanPresentableName().equals("it.businesslogic.ireport.JRField"))
        {
            java.awt.datatransfer.DataFlavor myFlavor = new java.awt.datatransfer.DataFlavor(it.businesslogic.ireport.JRField.class, it.businesslogic.ireport.JRField.class.getName());
            it.businesslogic.ireport.JRField field = (it.businesslogic.ireport.JRField)tr.getTransferData( myFlavor );
            // Add a field!!!           
            //System.out.println("Field name:" + field.getName() +" from "+ field.getClassType() );
            
            // Create a standard field...
            this.jrf.dropNewTextField( dtde.getLocation(), "$F{"+ field.getName() +"}",  field.getClassType() );
        }
        else if (df[0].getHumanPresentableName().equals("it.businesslogic.ireport.JRVariable"))
        {
            java.awt.datatransfer.DataFlavor myFlavor = new java.awt.datatransfer.DataFlavor(it.businesslogic.ireport.JRVariable.class, it.businesslogic.ireport.JRVariable.class.getName());
            it.businesslogic.ireport.JRVariable var = (it.businesslogic.ireport.JRVariable)tr.getTransferData( myFlavor );
            // Add a field!!!           
            //System.out.println("Field name:" + field.getName() +" from "+ field.getClassType() );
            
            // Create a standard field...
            this.jrf.dropNewTextField( dtde.getLocation(), "$V{"+ var.getName() +"}",  var.getClassType() );
        }
        else if (df[0].getHumanPresentableName().equals("it.businesslogic.ireport.JRParameter"))
        {
            java.awt.datatransfer.DataFlavor myFlavor = new java.awt.datatransfer.DataFlavor(it.businesslogic.ireport.JRParameter.class, it.businesslogic.ireport.JRParameter.class.getName());
            it.businesslogic.ireport.JRParameter var = (it.businesslogic.ireport.JRParameter)tr.getTransferData( myFlavor );
            // Add a field!!!           
            //System.out.println("Field name:" + field.getName() +" from "+ field.getClassType() );
            
            // Create a standard field...
            this.jrf.dropNewTextField( dtde.getLocation(), "$P{"+ var.getName() +"}",  var.getClassType() );
        }
        else 
        {   
            Class c = Class.forName( df[0].getHumanPresentableName() );
            if (it.businesslogic.ireport.gui.library.AbstractLibraryObject.class.isAssignableFrom( c ))
            {
                java.awt.datatransfer.DataFlavor myFlavor = new java.awt.datatransfer.DataFlavor(c, df[0].getHumanPresentableName());
               Object obj = tr.getTransferData( myFlavor );
                ((it.businesslogic.ireport.gui.library.AbstractLibraryObject )obj).drop(dtde);
            }
            else // if (.equals("it.businesslogic.ireport.JRParameter"))
            {
                System.out.println("Dropped a "+df[0].getHumanPresentableName());
            }
        }
        /*
        else // if (.equals("it.businesslogic.ireport.JRParameter"))
        {
            System.out.println("Dropped a "+df[0].getHumanPresentableName());
        }
        */
        context.dropComplete(true);
        } catch (Exception ex)
        {
            System.out.println("Errore in drop!");
            ex.printStackTrace();
        }
    }
    
    public void dropActionChanged(java.awt.dnd.DropTargetDragEvent dtde) {
    }
    
}