/* TerrainViewerUI.java

   Written February 2004 by John Bell for CS 526

   This module is the the "View" portion of the MVC.
   It notifies the Model ( written in C++ ) when events occur on the UI

*/


import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.filechooser.*;

public class TerrainViewerUI extends JFrame implements ActionListener, ChangeListener {

	int DataMin = 0, DataMax = 255, Delta8;

	JButton ElevationBrowseButton, TextureBrowseButton, Quit;
	JTextField RedDisplay, GreenDisplay, BlueDisplay, YellowDisplay, ScaleDisplay;
	JSlider Red, Green, Blue, Yellow, Scale;
	JFileChooser ElevationChooser, TextureChooser;
	JTextField ElevationFileDisplay, TextureFileDisplay;
	JRadioButton GreyScale, ColorMap, TextureMap;
	JFrame Frame;

	native void setElevationFile( String filename );
	native void setTextureFile( String filename );
	native void setGrayScale( );
	native void setColorMap( );
	native void setTextureMap( );
	native void setScaling( double scaling );
	native void setRed( int red );
	native void setGreen( int green );
	native void setBlue( int blue );
	native void setYellow( int yellow );
	native int getDataMin( );
	native int getDataMax( );

	TerrainViewerUI( String title ) {

		super( title );


		getContentPane().setLayout( new FlowLayout( ) );
		
		JPanel p = new JPanel( new GridLayout( 2, 1 ) );

			JPanel p2 = new JPanel( new FlowLayout( ) );
				p2.add( new JLabel( "Elevation File:" ) );
				ElevationFileDisplay = new JTextField( "canyon_elev.raw", 20 );
				ElevationFileDisplay.addActionListener( this );
				p2.add( ElevationFileDisplay );
				ElevationBrowseButton = new JButton( "Browse" );
				ElevationBrowseButton.addActionListener( this );
				p2.add( ElevationBrowseButton );
			p.add( p2 );

			JPanel p3 = new JPanel( new FlowLayout( ) );
				p3.add( new JLabel( "Texture File:  " ) );
				TextureFileDisplay = new JTextField( "canyon_rgb.jpg", 20 );
				TextureFileDisplay.addActionListener( this );
				p3.add( TextureFileDisplay );
				TextureBrowseButton = new JButton( "Browse" );
				TextureBrowseButton.addActionListener( this );
				p3.add( TextureBrowseButton );
			p.add( p3 );

			p.setBorder( new EtchedBorder( ) );

		getContentPane( ).add( p );

		JPanel p4 = new JPanel( new GridLayout( 1, 2 ) );
			p4.add( new JLabel( "Color Mode:" ) );

			JPanel p5 = new JPanel( new GridLayout( 3, 1 ) );
				ButtonGroup bg = new ButtonGroup( );
				GreyScale = new JRadioButton( "Grey Scale", true );
				bg.add( GreyScale );
				p5.add( GreyScale );
				ColorMap = new JRadioButton( "Color Map" );
				bg.add( ColorMap );
				p5.add( ColorMap );
				TextureMap = new JRadioButton( "Texture Map" );
				bg.add( TextureMap );
				p5.add( TextureMap );
			p4.add( p5 );

			p4.setBorder( new EtchedBorder( EtchedBorder.RAISED ) );

		getContentPane( ).add( p4 );

		JPanel p6 = new JPanel( new FlowLayout( ) );
			p6.add( new JLabel( "Height Scaling:" ) );

			Scale = new JSlider( -100, 100, -10 );
			Scale.addChangeListener( this );
			p6.add( Scale );

			ScaleDisplay = new JTextField( "-1.0", 5 );
			ScaleDisplay.addActionListener( this );
			p6.add( ScaleDisplay );

			p6.setBorder( new EtchedBorder( EtchedBorder.LOWERED ) );

		getContentPane( ).add( p6 );

		DataMin = getDataMin( );
		DataMax = getDataMax( );
		Delta8 = ( DataMax - DataMin ) / 8;

		JPanel p7 = new JPanel( new GridLayout( 4, 4 ) );
			p7.setBorder( new TitledBorder( new EtchedBorder( ), 
			"Contours - Range = " + DataMin + " to " + DataMax ) );

			JPanel p7a = new JPanel( new FlowLayout( ) );
				p7a.add( new JLabel( "Red:     " ) );

				int r = DataMin + Delta8;
				Red = new JSlider( DataMin, DataMax, r );
				Red.addChangeListener( this );
				p7a.add( Red );

				RedDisplay = new JTextField( "" + r, 5 );
				RedDisplay.addActionListener( this );
				p7a.add( RedDisplay );

			p7.add( p7a );

			JPanel p7b = new JPanel( new FlowLayout( ) );
				p7b.add( new JLabel( "Blue:    " ) );

				int b = DataMin + 3 * Delta8;
				Blue = new JSlider( DataMin, DataMax, b );
				Blue.addChangeListener( this );
				p7b.add( Blue );

				BlueDisplay = new JTextField( "" + b, 5 );
				BlueDisplay.addActionListener( this );
				p7b.add( BlueDisplay );

			p7.add( p7b );

			JPanel p7c = new JPanel( new FlowLayout( ) );
				p7c.add( new JLabel( "Green: " ) );

				int g = DataMin + 5 * Delta8;
				Green = new JSlider( DataMin, DataMax, g );
				Green.addChangeListener( this );
				p7c.add( Green );

				GreenDisplay = new JTextField( "" + g, 5 );
				GreenDisplay.addActionListener( this );
				p7c.add( GreenDisplay );

			p7.add( p7c );

			JPanel p7d = new JPanel( new FlowLayout( ) );
				p7d.add( new JLabel( "Yellow:" ) );

				int y = DataMin + 7 * Delta8;
				Yellow = new JSlider( DataMin, DataMax, y );
				Yellow.addChangeListener( this );
				p7d.add( Yellow );

				YellowDisplay = new JTextField( "" + y, 5 );
				YellowDisplay.addActionListener( this );
				p7d.add( YellowDisplay );

			p7.add( p7d );

		getContentPane( ).add( p7 );

		addWindowListener( new windowCloser( ) );

		return;
	}

	public void actionPerformed( ActionEvent e ) {

		Object o = e.getSource( );

		// Note:  A switch does not work here:

		if( o == ElevationBrowseButton ) {
	        //Create a file chooser
			ElevationChooser = new JFileChooser();
			ElevationChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
			ElevationChooser.addActionListener( this );
			ElevationChooser.setFileFilter( new RawFilter( ) );
			Frame = new JFrame( );
			Frame.getContentPane( ).add( ElevationChooser );
			Frame.setSize( 350, 350 );
			Frame.show( );
		} else if ( o == TextureBrowseButton ) {
	        //Create a file chooser
			TextureChooser = new JFileChooser();
			TextureChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
			TextureChooser.addActionListener( this );
			TextureChooser.setFileFilter( new ImageFilter( ) );
			Frame = new JFrame( );
			Frame.getContentPane( ).add( TextureChooser );
			Frame.setSize( 300, 300 );
			Frame.show( );
		} else if ( o == TextureFileDisplay )
			setTextureFile( TextureFileDisplay.getText( ) );
		else if ( o == ElevationFileDisplay )
			setElevationFile( ElevationFileDisplay.getText( ) );
		else if( o == ElevationChooser ) {
			if( e.getActionCommand( ) == "CancelSelection" )
				Frame.dispose( );
			else if ( e.getActionCommand( ) == "ApproveSelection" ) {
				ElevationFileDisplay.setText( ElevationChooser.getSelectedFile( ).getName( ) );
				setElevationFile( ElevationFileDisplay.getText( ) );
				Frame.dispose( );
			}
		} else if( o == TextureChooser ) {
			if( e.getActionCommand( ) == "CancelSelection" )
				Frame.dispose( );
			else if ( e.getActionCommand( ) == "ApproveSelection" ) {
				TextureFileDisplay.setText( TextureChooser.getSelectedFile( ).getName( ) );
				setTextureFile( TextureFileDisplay.getText( ) );
				Frame.dispose( );
			}
		} else if ( o == RedDisplay ) {
			int r = Integer.parseInt( RedDisplay.getText( ) );
			if( r >= Red.getMinimum( ) && r <= Red.getMaximum( ) ) {
				Red.setValue( r );
				setRed( r );
			} else
				RedDisplay.setText( "" + Red.getValue( ) );
		} else if ( o == GreenDisplay ) {
			int g = Integer.parseInt( GreenDisplay.getText( ) );
			if( g >= Green.getMinimum( ) && g <= Green.getMaximum( ) ) {
				Green.setValue( g );
				setGreen( g );
			} else
				GreenDisplay.setText( "" + Green.getValue( ) );
		} else if ( o == BlueDisplay ) {
			int b = Integer.parseInt( BlueDisplay.getText( ) );
			if( b >= Blue.getMinimum( ) && b <= Blue.getMaximum( ) ) {
				Blue.setValue( b );
				setBlue( b );
			} else
				BlueDisplay.setText( "" + Blue.getValue( ) );
		} else if ( o == YellowDisplay ) {
			int y = Integer.parseInt( YellowDisplay.getText( ) );
			if( y >= Yellow.getMinimum( ) && y <= Yellow.getMaximum( ) ) {
				Yellow.setValue( y );
				setYellow( y );
			} else
				YellowDisplay.setText( "" + Yellow.getValue( ) );
		} else if ( o == ScaleDisplay ) {
			int s = ( int ) ( 10.0 * Double.parseDouble( ScaleDisplay.getText( ) ) );
			if( s >= Scale.getMinimum( ) && s <= Scale.getMaximum( ) ) {
				Scale.setValue( s );
				setScaling( s / 10.0 );
			} else
				ScaleDisplay.setText( "" + Scale.getValue( ) / 10.0 );
		}
		else {
			System.out.println( e.getActionCommand( ) );
		}

		return;
	}

	public void stateChanged( ChangeEvent e ) {

		JSlider j = ( JSlider ) e.getSource( );
		if( j == Scale ) {
			ScaleDisplay.setText( "" + j.getValue( ) / 10.0 );
			setScaling( j.getValue( ) / 10.0 );
		} else if( j == Red ) { 
			RedDisplay.setText( "" + j.getValue( ) );
			setRed( j.getValue( ) );
		} else if( j == Green ) {
			GreenDisplay.setText( "" + j.getValue( ) );
			setGreen( j.getValue( ) );
		} else if( j == Blue ) {
			BlueDisplay.setText( "" + j.getValue( ) );
			setBlue( j.getValue( ) );
		} else if( j == Yellow ) {
			YellowDisplay.setText( "" + j.getValue( ) );
			setYellow( j.getValue( ) );
		}

		return;
	}

//	void displayText( String s ) {

//		Display.append( s );
//		return;
//	}

} // End of TerrainViewerUI class


class windowCloser extends WindowAdapter {

	public void windowClosing( WindowEvent e ) {

		System.exit( 0 );
	}

} // End of windowCloser