package jimm.ui;

import java.util.*;
import javax.microedition.lcdui.*;

import DrawControls.*;
import jimm.*;
import jimm.cl.*;
import jimm.ui.base.*;
import jimm.ui.menu.*;

public class SliderTask extends CanvasEx implements Runnable {
/**
*@author Rishat Shamsutdinov
*/
	public static final int PERIOD 	= 7; //7
	public static final int COUNT	= 19; //9

	private final static Timer sliderTimer = new Timer();

	private TimerTask slider;
	private CanvasEx bgdScreen;
	private Image scrImg;
	private CanvasEx nextScreen;
	private int shiftX, shiftY, transY, transX;
	private int count = COUNT;
	private boolean stop;
	private int ftx, fty, x, y;

	public SliderTask(CanvasEx screen, CanvasEx bgdScreen, CanvasEx nextScreen, int tx, int ty, int dx, int dy, int x, int y) {
		try {
			scrImg = screen.paintOnImage();
		} catch (OutOfMemoryError oome) {
			count = 0;
		}
		this.bgdScreen = bgdScreen;
		this.nextScreen = nextScreen;
		if (nextScreen instanceof Select && screen != nextScreen) { //ContactList //VirtualList-i
			dx += dx / COUNT;
			dy += dy / COUNT;
		}
		shiftX = -dx / COUNT;
		shiftY = -dy / COUNT;
		transX = tx;
		transY = ty;
		ftx = tx + dx;
		fty = ty + dy;
		this.x = x;
		this.y = y;
	}

	public SliderTask(CanvasEx screen, CanvasEx bgdScreen, CanvasEx nextScreen, int tx, int dx) {
		this(screen, bgdScreen, nextScreen, tx, 0, dx, 0, 0, 0);
	}

	public CanvasEx getNextScreen() {
		return nextScreen;
	}

	private synchronized void startSliding() {
		if (slider != null) {
			return;
		}
		slider = new TimerTask() {
			public void run() {
				Jimm.getDisplay().callSerially(SliderTask.this);
			}
		};
		sliderTimer.schedule(slider, PERIOD, PERIOD);
	}

	private synchronized boolean check() {
		//System.out.println("TRS: "+transX+"; "+transY + " -> " + count);
		return (transX*(transX - shiftX) < 0 || transY*(transY - shiftY) < 0 || count-- <= 0);
	}

	public void run() {
		lock();
		if (check()) {
			//transX = transY = 0;
			transX = ftx;
			transY = fty;
			stop = true;
			if (slider != null) {
				slider.cancel();
				slider = null;
			}
			//screen = nextScreen;
		} else {
			transX -= shiftX;
			transY -= shiftY;
		}
		unlock();
		//invalidate();
	}

	private void switchScreen() {
		//if (nextScreen != bgdScreen && bgdScreen != null) {
		//	bgdScreen.unlock();
		//}
		//if (NativeCanvas.isActive(this) && this.equals(Jimm.getCurrentDisplay())) {
			Jimm.setDisplay(nextScreen);
		//}
		//System.out.println("====================");
		nextScreen.unlock();
	}

	public void beforShow() {
		startSliding();
	}

	public void paint(GraphicsEx g) {
		//System.out.print("[Painting ...]");
		if (bgdScreen != null) {
			paint(g);
		}
		if (scrImg != null) {
			g.drawImage(scrImg, x + transX, y + transY, Graphics.LEFT | Graphics. TOP);
		}
		if (stop) {
			stop = false;
			switchScreen();
		}
	}

	protected void doKeyReaction(int keyCode, int actionCode, int type) {
	}
}