//package code.iface.imageblend;

import java.awt.*;
import java.awt.image.*;
import java.awt.Color;
import java.net.*;
import javax.swing.*;
import java.awt.event.*;
//import code.iface.utils.*;
//import code.operator.imageblend.*;

/**
 *
 *SImageBlendScreen is the user interface to the pixel blending
 *algorithm (hiprjava.operator.ImageBlend.java) It is run as an applet
 *embedded in the file pixBlend.htm.
 *
 *@author Judy Robertson SELLIC OnLine
 *@author Neil Brown, DAI
 *@author Timothy Sharman
 */
public class SImageBlendScreen extends VisionApplet2{

  //The operator class for performing image blending. It's a thread
  ImageBlend imageblend;

  //The blending factor
  private float blend = (float)0.5;
  
  //should we use a constant or an image?
  private boolean constant;
  
  //what is the constant value?
  private float constantvalue = 0;
  
  //The final scaling to be appilied to result image
  private float scalevalue = 1;
  
  //The offset value to add to the result image 
  private float offsetvalue =0;
  
  //The listeners for the GUI
  private ComboListener cltoggle = new ComboListener();
  private ButtonListener startbl = new ButtonListener();
  private ButtonListener abortbl = new ButtonListener();

  //The components for the GUI
  private JTextField time_taken = new JTextField(20);
  private JLabel time = new JLabel("Time");
  private JLabel execution_time = new JLabel("Execution time: ");
  private JLabel source2 = new JLabel("Source 2");
  private JComboBox sourcetoggle = new JComboBox();
  private JLabel blendlabel = new JLabel("Blending factor");
  private JTextField blendbox = new JTextField( 10 );
  private JLabel constantlabel = new JLabel("Constant value");
  private JTextField constantbox = new JTextField(10);
  private JTextField offsetbox = new JTextField(10);
  private JLabel offset = new JLabel("Offset");
  private JTextField scalebox = new JTextField(10);
  private JLabel scaling = new JLabel("Scaling");
  private JButton startbutton = new JButton("Blend");
  private JButton abortbutton = new JButton("Stop");
 
  public void add_extra() {
    
    //initialise the operator constructors
    imageblend = new ImageBlend(i1_w, i2_w);
    
    midc. weighty = 0.5;
    midlayout. setConstraints(source2, midc);
    mid. add(source2);
    
    midc. gridx = 1;
    sourcetoggle. addItem("Input 2");
    sourcetoggle. addItem("Constant");
    midlayout. setConstraints( sourcetoggle, midc );
    mid. add( sourcetoggle );
    sourcetoggle. addActionListener(cltoggle);
    
    midc.gridx = 0;
    midc.gridy = 1;
    midlayout. setConstraints(constantlabel, midc);
    mid. add(constantlabel);
    
    midc. gridx = 1;
    midc. gridy = 1;
    midlayout. setConstraints(constantbox, midc);
    mid. add(constantbox);
    constantbox. setText("1.0");
    constantbox. setEditable(false);
    
    // Blending label and box
    midc.gridx = 0;
    midc.gridy = 2;
    midlayout. setConstraints( blendlabel, midc );
    mid. add( blendlabel );
    
    midc. gridx = 1;
    midc. gridy = 2;
    midlayout. setConstraints( blendbox, midc );
    mid. add( blendbox );
    blendbox. setText("0.5");
    
    midc. gridx = 0;
    midc. gridy = 3;
    midlayout. setConstraints(scaling, midc);
    mid. add(scaling);
    
    midc. gridx = 1;
    midlayout. setConstraints(scalebox, midc);
    scalebox. setText("1.0");
    mid. add(scalebox);
    
    midc. gridx = 0;
    midc. gridy = 4;
    
    midlayout. setConstraints(offset, midc);
    mid. add(offset);
    
    midc. gridx = 1;
    midc. gridy = 4;
    midlayout. setConstraints(offsetbox, midc);
    offsetbox. setText("0");
    mid. add(offsetbox);
    
    midc. gridx = 0;
    midc. gridy = 5;
    midlayout. setConstraints(startbutton, midc);
    startbutton .setBackground(Color.green);
    mid. add(startbutton);
    startbutton. addActionListener(startbl);
        
    midc. gridx = GridBagConstraints.RELATIVE;
    abortbutton. setBackground(Color.red);
    midlayout. setConstraints(abortbutton, midc);
    mid. add(abortbutton);
    abortbutton. addActionListener(abortbl);

    midc. gridwidth = 1;
    midc. fill = GridBagConstraints. NONE;
    midc. gridx = 0;
    midc. gridy = 6;
    midlayout. setConstraints(time, midc);
    
    mid. add(time);
    
    midc. gridx = 1;
    midlayout. setConstraints(time_taken, midc);
    time_taken. setEditable(false);
    mid. add(time_taken);

    mid. repaint();
  }


  /**
   *
   *Handles the actions performed when combo lists on the interface are selected.
   *
   *@param evt The event which caused this object to be called
   *
   */
  
  class ComboListener implements ActionListener {
    
    public void actionPerformed(ActionEvent evt) {
      JComboBox cb = (JComboBox)evt.getSource();
      
      if( cb.getSelectedItem().equals("Input 2") ) {
	constantbox. setEditable(false);
	constant = false;
      }
      else if( cb.getSelectedItem().equals("Constant")){
	constantbox. setEditable(true);
	constant = true;
      }
    }
  }
  

  /**
   *
   *Handles the actions performed when buttons on the interface are pressed.
   *
   *@param evt The event which caused this object to be called
   *
   */
  
  class ButtonListener implements ActionListener {
    
    public void actionPerformed(ActionEvent evt) {
       JButton b = (JButton)evt.getSource();
       if( b == startbutton ) {
	 out. add(output);
	 time_msec = System.currentTimeMillis();
	 constant = sourcetoggle.getSelectedItem().equals("Constant");
	 try{
	   constantvalue =  Float. valueOf( constantbox.getText() ).floatValue();
	   offsetvalue = Float. valueOf (offsetbox.getText()). floatValue();
	   scalevalue = Float. valueOf(scalebox.getText()).floatValue();
	   blend = Float.valueOf( blendbox.getText()).floatValue();
	   if(blend < 0 || blend > 1){
	     JOptionPane.showMessageDialog(null,("Blend value must be between 0 and 1"),
					 ("Error!"), JOptionPane.WARNING_MESSAGE);
	   }
	   else{
	     if (constant) {
	       dest_1d = imageblend.DoBlend( src1_1d, constantvalue, blend, i1_w,
					     i1_h, offsetvalue, scalevalue );
	       dest = createImage(new MemoryImageSource(i1_w, i1_h,dest_1d,0, i1_w));
	       outsize. setText(i1_w+" x "+i1_h);
	     } else{
	       dest_1d = imageblend.DoBlend( src1_1d, src2_1d, blend, d_w, d_h,
					     offsetvalue, scalevalue );
	       dest = createImage(new MemoryImageSource(d_w,d_h,dest_1d,0,d_w));
	       outsize. setText(d_w+" x "+d_h);
	     }
	     
	     dest_canvas. updateImage(dest);
	     //Add a pixel listener to the canvas
	     PixelListener outpl = new PixelListener();
	     dest_canvas. addMouseMotionListener(outpl);
	     time_msec = System.currentTimeMillis() - time_msec;
	     time_taken. setText(new Long(time_msec).toString()+" msecs");
	   }
	 }
	 catch(NumberFormatException e){
	   JOptionPane.showMessageDialog(null,("Invalid parameters specified"),
					 ("Error!"), JOptionPane.WARNING_MESSAGE);
	 }
       }
       
       else if ( b == abortbutton ) {
      
	 time_taken. setText("");
	
       }
    }
  }

  public void set_src1_image(int [] input_img, int w, int h, String name) {
    
    //create a new blending operator
    imageblend = new ImageBlend(i1_w, i2_w);

    set_src1_image2(input_img, w, h, name);
  }

  public void set_src2_image(int [] input_img, int w, int h, String name) {
    
    //create a new blending operator
    imageblend = new ImageBlend(i1_w, i2_w);

    set_src2_image2(input_img, w, h, name);
  }
  
   /**
   *Used by the browser to find out what the applet is for
   *
   *@return the function of the applet
   */
  public String getAppletInfo() {
    return "Image blending Applet."+
     "\nWritten by Judy Robertson, SELLIC OnLine\nand Neil Brown, DAI, Timothy Sharman\n";
  }
}