/* UserInputFrame.java
	User Input Frame - allows users to provide data

	Note: need to reset text_complete when text is changed
*/

package ciips.animation;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;

/**
 * User input frame which pops up when user input is allowed
 * @see AlgAnimFrame
 */
public class UIFrame extends Frame implements ActionListener {
	private AlgAnimFrame parent;
  private static final boolean DEBUG = true;

	private static boolean user_input_allowed = false;
	private static int DEF_ROWS = 10, DEF_COLUMNS = 30;
	private static int DEF_X_LOC = 100, DEF_Y_LOC = 100;

	private Dimension pref_size = new Dimension( 200, 100 );
	private Panel text_input;
	private TextArea ta = null;
	private Button text_ok = null;
	private boolean text_complete = false;
	private TextField status = null;
	private static final String def_status = "Enter list of numbers";
	private Panel file_input;
	
	public static void allowUI( boolean UI_allowed ) {
		user_input_allowed = UI_allowed;
		}

	public static boolean isUIAllowed() { return user_input_allowed; }

  public UIFrame( AlgAnimFrame parent_frame, String algname ) {

		if ( !user_input_allowed ) return; // Don't create a user input frame

		setTitle("User Input for " + algname);
		setLocation( DEF_X_LOC, DEF_Y_LOC );
		if( DEBUG ) System.out.println("UIFrame - User input allowed ");
	
		setLayout( new BorderLayout() );
		// setFont(helv14);

		// Make the text input panel
		text_input = new Panel();
		// text_input.setLayout( new GridLayout(4,1) );
		GridBagLayout gb = new GridBagLayout();
		GridBagConstraints gc = new GridBagConstraints();
		gc.gridx = 0;
		gc.gridy = GridBagConstraints.RELATIVE;
		gc.fill = GridBagConstraints.HORIZONTAL;
		gc.weighty = 1.0;
		
		text_input.setLayout( gb );
		TextField prompt = new TextField( "Type desired input, click OK" );
		prompt.setEditable( false );
		gb.setConstraints( prompt, gc );
		text_input.add( prompt );

		ta = new TextArea( DEF_ROWS, DEF_COLUMNS );
		gc.weighty = 10.0;
		gb.setConstraints( ta, gc );
		text_input.add( ta );
		status = new TextField( def_status );
		status.setEditable( false );
		gb.setConstraints( status, gc );
		text_input.add( status );
		text_ok = new Button( "OK" );
		gc.weighty = 1.0;
		gb.setConstraints( text_ok, gc );
		text_input.add( text_ok );
		text_ok.addActionListener( this );
		// text_input.pack();
		add( "North", text_input );

		file_input = new Panel();
		Label f_input = new Label( "File Input" );
		file_input.add( f_input );
		Label not_imp = new Label( "Not implemented yet" );
		file_input.add( not_imp );
		add( BorderLayout.SOUTH, file_input );
		pack();
		validate();
		// setVisible( false );
		}

	public void setVisible( boolean visible ) {
		if ( !user_input_allowed ) return;
		if ( visible ) {
			if( DEBUG ) System.out.println("User Input Window Visible");
			validate();
			}
		super.setVisible( visible );
		status.setText( def_status );
		}

	public Dimension getPreferredSize() { return pref_size; }
	public Dimension preferredSize() { return pref_size; }

	public String getTextInput() {
		try {
			while ( !text_complete ) {
				System.out.println("UIFrame: waiting");
				Thread.sleep( 1000L );
				}
			}
		catch( InterruptedException e ) {};
		if( text_complete ) {
			text_complete = false;
			// Grey out text?
			return ta.getText();
			}
		else return null;
		}

	public IntList getIntList() {
		IntList int_list = null;
		try {
			String s = getTextInput();
			if( s != null ) {
				int_list = new IntList( s );
				}
			}
		catch( Exception e ) {
			status.setText( e.getMessage() );
			System.out.println("UIFrame:getIntList - exception (" + e.getMessage() + ")" );
			}
		super.setVisible( int_list == null );
		if ( int_list == null ) repaint();	
		return int_list;
		}

	public void actionPerformed( ActionEvent e ) {
		if( DEBUG ) System.out.println("UIFrame:actionPerformed - from " + e.getSource() );
		if ( e.getSource() == text_ok ) {
			text_complete = true;
			}
		}

} // class UIFrame