package ij.gui;
import ij.*;
import ij.process.*;
import ij.util.*;
import ij.plugin.Colors;
import java.awt.*;
import java.util.Vector;
import java.awt.event.*;


 /** Displays a dialog that allows the user to select a color using three sliders. */
public class ColorChooser implements TextListener, AdjustmentListener {
	Vector colors, sliders;
	ColorPanel panel;
	Color initialColor;
	int red, green, blue;
	boolean useHSB;
	String title;
	Frame frame;

	/** Constructs a ColorChooser using the specified title and initial color. */
	public ColorChooser(String title, Color initialColor, boolean useHSB) {
		this(title, initialColor, useHSB, null);
	}
	
	public ColorChooser(String title, Color initialColor, boolean useHSB, Frame frame) {
		this.title = title;
		if (initialColor==null) initialColor = Color.black;
		this.initialColor = initialColor;
		red = initialColor.getRed();
		green = initialColor.getGreen();
		blue = initialColor.getBlue();
		this.useHSB = useHSB;
		this.frame = frame;
	}

	/** Displays a color selection dialog and returns the color selected by the user. */
	public Color getColor() {
		GenericDialog gd = frame!=null?new GenericDialog(title, frame):new GenericDialog(title);
		gd.addSlider("Red:", 0, 255, red);
		gd.addSlider("Green:", 0, 255, green);
		gd.addSlider("Blue:", 0, 255, blue);
		panel = new ColorPanel(initialColor);
		gd.addPanel(panel, GridBagConstraints.CENTER, new Insets(10, 0, 0, 0));
		colors = gd.getNumericFields();
		for (int i=0; i<colors.size(); i++)
			((TextField)colors.elementAt(i)).addTextListener(this);
		sliders = gd.getSliders();
		for (int i=0; i<sliders.size(); i++)
			((Scrollbar)sliders.elementAt(i)).addAdjustmentListener(this);
		gd.showDialog();
		if (gd.wasCanceled()) return null;
		int red = (int)gd.getNextNumber();
		int green = (int)gd.getNextNumber();
		int blue = (int)gd.getNextNumber();
		return new Color(red, green, blue);
	}

	public void textValueChanged(TextEvent e) {
		int red = (int)Tools.parseDouble(((TextField)colors.elementAt(0)).getText());
		int green = (int)Tools.parseDouble(((TextField)colors.elementAt(1)).getText());
		int blue = (int)Tools.parseDouble(((TextField)colors.elementAt(2)).getText());
		if (red<0) red=0; if (red>255) red=255;
		if (green<0) green=0; if (green>255) green=255;
		if (blue<0) blue=0; if (blue>255) blue=255;
		panel.setColor(new Color(red, green, blue));
		panel.repaint();
	}

	public synchronized void adjustmentValueChanged(AdjustmentEvent e) {
		Object source = e.getSource();
		for (int i=0; i<sliders.size(); i++) {
			if (source==sliders.elementAt(i)) {
				Scrollbar sb = (Scrollbar)source;
				TextField tf = (TextField)colors.elementAt(i);
			}
		}
	}

}

class ColorPanel extends Panel {
	static final int WIDTH=150, HEIGHT=50;
	static Font font = new Font("Monospaced", Font.PLAIN, 18);
	Color c;
	 
	ColorPanel(Color c) {
		this.c = c;
	}

	public Dimension getPreferredSize() {
		return new Dimension(WIDTH, HEIGHT);
	}

	void setColor(Color c) {
		this.c = c;
	}

	public Dimension getMinimumSize() {
		return new Dimension(WIDTH, HEIGHT);
	}

	public void paint(Graphics g) {
		g.setColor(c);
		g.fillRect(0, 0, WIDTH, HEIGHT);
		int intensity = (c.getRed()+c.getGreen()+c.getBlue())/3;
		Color c2 = intensity<128?Color.white:Color.black;
		g.setColor(c2);
		g.setFont(font);
		Java2.setAntialiasedText(g, true);
		String s = Colors.colorToString(c);
		g.drawString(s, 5, HEIGHT-5);
		g.setColor(Color.black);
		g.drawRect(0, 0, WIDTH-1, HEIGHT-1);
	}

}
