// (c) Copyright 1997 Peter Sandborn ALL RIGHTS RESERVED

//package savantage.awt;
//import savantage.dialog.*;
//import savantage.util.*;
//import savantage.data.*;
import java.awt.*;
import java.awt.image.*;
import java.lang.Math;
import java.applet.*;
//import gjt.Border;


//------------------------------------------------------------------------------
// ScatterPlot.java:
//		Creates a dialog box for displaying a scatter plot
//------------------------------------------------------------------------------

public class ScatterPlot extends Frame
{
	private Applet parent;
	private Button ok_button;
	private Button clear_button;
	//private Button color_button;
	private Choice color_choice;
	private Panel titlePanel;

    private int number_points;
	private String x_axis;
	private String y_axis;
	private double[] x_values;
	private double[] y_values;
	private Color[] c_values;

	private double L;
	private Color point_color;

	double max_x;
	double min_x;
	double max_y;
	double min_y;
	int bottom_axis;  // y location of horizontal axis
	int left_axis;  // x location of vertical axis
	int length_x_axis;
	int length_y_axis;

	// Constructor
	//--------------------------------------------------------------------------
	public ScatterPlot (Applet p,String topic)
	{
		super("Scatter Plot");
		parent = p;
		L = 9999999.0;

		// Title
		titlePanel = new Panel();
		Label label = new Label(topic);
		label.setFont(new Font("Helvetica",Font.BOLD,14));
		titlePanel.add(label);
		add("North",titlePanel);

		// Buttons
		Panel buttonPanel = new Panel();
		ok_button = new Button("OK");
		//Border blackBorder = new Border(ok_button,1);
		//blackBorder.setLineColor(parent.sdacolor.buttonborder);
		clear_button = new Button("Clear Plot");
		//help_button = new helpButton(parent,parent.language.help);
		//color_button = new Button("Change Color");
		buttonPanel.setLayout(new FlowLayout());
		buttonPanel.add(ok_button);
		buttonPanel.add(clear_button);
		color_choice = new Choice();
		color_choice.addItem("Red");
		color_choice.addItem("Blue");
		color_choice.addItem("Green");
		color_choice.addItem("Black");
		buttonPanel.add(color_choice);
		//buttonPanel.add(color_button);
		add("South",buttonPanel);

		//setBackground(parent.sdacolor.dialogbackground);
		reshape(0,0,150,200);  // does nothing
	}


    // n = number of points
    // values_x = array of x values
    // values_y = array of y values
    // x = x axis label
    // y = y axis label
    public void loadScatterPlotData(String x,String y,double max,double mix,double may,double miy)
    {
		x_axis = x;
		y_axis = y;
		min_x = mix;
		max_x = max;
		min_y = miy;
		max_y = may;	
		number_points = 0;  // initialization
		
		x_values = new double[1000];
		y_values = new double[1000];
		c_values = new Color[1000];
		
		point_color = Color.red;
    }
	
	public void addPoint(double x,double y)
	{
		x_values[number_points] = x;
		y_values[number_points] = y;
		if(color_choice.getSelectedItem().compareTo("Red") == 0)
			point_color = Color.red;
		if(color_choice.getSelectedItem().compareTo("Blue") == 0)
			point_color = Color.blue;
		if(color_choice.getSelectedItem().compareTo("Green") == 0)
			point_color = Color.green;
		if(color_choice.getSelectedItem().compareTo("Black") == 0)
			point_color = Color.black;
		c_values[number_points] = point_color;
		number_points++;
		drawScatterPlot();
	}


    public boolean drawScatterPlot()
	{
		repaint();
		return true;
	}

	public void paint(Graphics g)
	{
	    Image im;
	    Graphics ig;
	    FilteredImageSource source;
	    Image si;
        FontMetrics fm = getFontMetrics(getFont());
		
		// Get drawing area size
        int top_border;
		int bottom_border;
		int left_border;
		int right_border;
		//if(System.getProperty("java.vendor").compareTo("Netscape Communications Corporation") == 0 && System.getProperty("os.name").compareTo("SunOS") == 0)  {
		    top_border = 70;
		    bottom_border = 10;
		//}  else  {
		    //top_border = 30;
		    //bottom_border = 60;
        //}
		int dim = 0;  // smallest drawing area dimension
		Dimension dimension = size();
		int x_dim = dimension.width;
		int y_dim = dimension.height-(top_border+bottom_border);
		dim = x_dim;
		if(dim > y_dim)  {
			dim = y_dim;
		}

        // Set offsets
        left_border = 60; //35;
        right_border = 25;

		// Draw plot axes
		bottom_axis = 3*(y_dim+top_border)/4;  // y location of horizontal axis
		left_axis = left_border;  // x location of vertical axis
		length_x_axis = x_dim - left_border - 25;
		length_y_axis = bottom_axis - top_border;
		g.drawLine(left_axis,top_border,left_axis,bottom_axis);
		g.drawLine(left_axis,bottom_axis,left_axis+length_x_axis,bottom_axis);

		// Label axes
		int j = fm.stringWidth(x_axis);  // length of the x_axis label
		g.drawString(x_axis,left_border+length_x_axis/2-j/2,bottom_axis+2+3*fm.getHeight());
		im = createImage(fm.stringWidth(y_axis)+2,fm.getHeight());
		ig = im.getGraphics();
		ig.setColor(Color.white);
		ig.fillRect(0,0,100,100);
		ig.setColor(Color.black);
		ig.drawString(y_axis,1,10);
		source = new FilteredImageSource(im.getSource(),new Rotate90DegreeFilter());
		si = createImage(source);
		g.drawImage(si,12,top_border+length_y_axis/2-(fm.stringWidth(y_axis)+2)/2,null);

		int tic_length = 10;
		// Add scales to x Axis
		for(int i = 0; i <= 10; i++)  {
			g.drawLine(left_axis+length_x_axis*i/10,bottom_axis-tic_length/2,left_axis+length_x_axis*i/10,bottom_axis+tic_length/2);
			Integer ii = new Integer(i*10);
			int jj = fm.stringWidth(ii.toString());
			g.drawString(ii.toString(),left_axis+length_x_axis*i/10-jj/2,bottom_axis+4*tic_length/2);
		}
		
		// Add scales to y Axis
		for(int i = 0; i <= 10; i++)  {
			g.drawLine(left_axis-tic_length/2,bottom_axis-length_y_axis*i/10,left_axis+tic_length/2,bottom_axis-length_y_axis*i/10);
			Integer ii = new Integer(i*10);
			int jj = fm.stringWidth(ii.toString());
			g.drawString(ii.toString(),left_axis-tic_length-jj,bottom_axis-length_y_axis*i/10+fm.getHeight()/2);		
		}
		
		// Plot points
		for(int i = 0; i < number_points; i++)  {
			g.setColor(c_values[i]);
		    g.fillRect(translatex(x_values[i]),translatey(y_values[i]),4,4);
		}

	}

    // Translate the array data values to screen locations
    private int translatex(double x)
    {
	    return((int) (left_axis + ((x-min_x)/(max_x-min_x))*length_x_axis));
    }
    private int translatey(double y)
    {
    	return((int) (bottom_axis - ((y-min_y)/(max_y-min_y))*length_y_axis));
    }

	// Catch events in the dialog box
	//--------------------------------------------------------------------------
	public boolean action(Event event,Object obj)
	{
		Object target = event.target;

		if(target instanceof Button)
		{
			Button button = (Button)target;
			String buttonLabel = button.getLabel();
			if(target == ok_button)
			{
				dispose();
			}
			if(target == clear_button)
			{
				number_points = 0;
				repaint();
			}

			return true;
		}
		return false;

	}


	public boolean keyDown (Event event,int key)
	{
		// Regular return (enter) key
		if(event.id == event.KEY_PRESS && key == '\n')  {
			hide();
		}
		return true;
	}

	public void popup()
	{
	    if(System.getProperty("java.vendor").compareTo("Netscape Communications Corporation") == 0 && System.getProperty("os.name").compareTo("SunOS") == 0)  {
    		show();
    		resize(400,400);
    		refresh_dialog();
    		titlePanel.requestFocus();
    	}  else  {
    		show();
    		resize(400,400);
    		titlePanel.requestFocus();
    	}
	}

	private void refresh_dialog()
	{
	    // Jitter the size of the form to force a refresh - necessary for NetScape

			// Get actuals here
			//Dimension dimension = size();
			int x = 400; //dimension.width;
			int y = 400; //dimension.height;

			// Resize
			resize(x+100,y+100);
			show();

			// Reset current size
			resize(x,y);

	}

}