/* 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 Panel text_input;
	private TextArea ta = null;
	private Button text_ok = null;
	private boolean text_complete = false;

	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);

		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 FlowLayout() );
		TextField prompt = new TextField( "Type desired input, click OK" );
		prompt.setEditable( false );
		text_input.add( prompt );
		ta = new TextArea( DEF_ROWS, DEF_COLUMNS );
		text_input.add( ta );
		text_ok = new Button( "OK" );
		text_ok.addActionListener( this );
		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 );

		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 );
		}

	public String getTextInput() {
		if( text_complete ) {
			text_complete = false;
			// Grey out text?
			return ta.getText();
			}
		else return null;
		}

	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