secondo/Javagui/viewer/spatial3D/ZoomFactorDialog.java

//This file is part of SECONDO.

//Copyright (C) 2004, University in Hagen, Department of Computer Science,
//Database Systems for New Applications.

//SECONDO 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.

//SECONDO 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 SECONDO; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

package  viewer.spatial3D; 

import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.*;
import viewer.Spatial3DViewer;

/**
 * class to set Zoom Factor
 */
public class ZoomFactorDialog extends JDialog{

  private JTextField zoomFactorField;
  private JButton cancelBtn;
  private JButton acceptBtn;
  private JButton resetBtn;
  private JButton defaultBtn;
  private Spatial3DViewer viewer;

  public ZoomFactorDialog(Spatial3DViewer sv){
    super(sv.getMainFrame(), true);
    this.viewer=sv;
    setSize(450,150);
    getContentPane().setLayout(new BorderLayout());
    JPanel panel = new JPanel();
    panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
    panel.add(new JLabel("Please enter a factor for Zoom Speed"));

    zoomFactorField=new JTextField(20);
    zoomFactorField.setText(""+viewer.getZoomFactor());
    panel.add(zoomFactorField);
    JPanel outerPanel = new JPanel();
    outerPanel.add(panel);

    cancelBtn = new JButton("Cancel");
    acceptBtn = new JButton("Accept");
    resetBtn  = new JButton("Reset");
    defaultBtn = new JButton("Default");

    ActionListener al = new ActionListener(){
      public void actionPerformed(ActionEvent evt){
        Object source = evt.getSource();
        if(source.equals(cancelBtn)){
          cancel();
          } else if(source.equals(acceptBtn)){
            accept();
            } else if(source.equals(resetBtn)){
              zoomFactorField.setText(""+viewer.getZoomFactor());
              } else if(source.equals(defaultBtn)){
                zoomFactorField.setText("1");
                }
        }
      };
    cancelBtn.addActionListener(al); 
    acceptBtn.addActionListener(al); 
    resetBtn.addActionListener(al);  
    defaultBtn.addActionListener(al);  

    JPanel buttonPanel = new JPanel();
    buttonPanel.add(cancelBtn); 
    buttonPanel.add(acceptBtn); 
    buttonPanel.add(resetBtn);  
    buttonPanel.add(defaultBtn);

    getContentPane().setLayout(new BorderLayout());
    getContentPane().add(outerPanel, BorderLayout.CENTER);
    getContentPane().add(buttonPanel, BorderLayout.SOUTH);

    // allow finish the dialog using ESC or return
    zoomFactorField.addKeyListener(new KeyAdapter(){
      public void keyPressed(KeyEvent evt){
        int c = evt.getKeyCode();
        if(c == KeyEvent.VK_ENTER){
          accept();
          } else if(c==KeyEvent.VK_ESCAPE){
            cancel();
            }
        }
      });


  }

  @Override
  public void setVisible(boolean b) {
    zoomFactorField.setText(""+viewer.getZoomFactor());
    super.setVisible(b);
    }
  
  private void cancel(){
    zoomFactorField.setText(""+viewer.getZoomFactor());
    setVisible(false);
    }

  private void accept(){
    try{
      double value = Double.parseDouble(zoomFactorField.getText().trim());
      if(value >= 0.01 && value <= 10){
        viewer.setZoomFactor(value);
        setVisible(false);
        } else {
          JOptionPane.showMessageDialog(this, "Zoom factor must be between 0.01 and 10");
          }
      } catch(Exception e){
        JOptionPane.showMessageDialog(this, "Zoom factor must be a number");
        }
    }



  }