import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.text.*;

public class ViewFrame extends JFrame {

	private static final double ZOOM_FACTOR = 1.5;

	private DateFormat dateFormat = new SimpleDateFormat("EEE MMM d yyyy HH:mm");

	ImagePanel imgPanel;

	private JScrollPane scrPanel;
	private ImageEntry entry = null;

	public ViewFrame () {
		this.imgPanel = new ImagePanel();
		PanListener.setupPan(imgPanel);
		imgPanel.setAutoscrolls(true);
		scrPanel = new JScrollPane(imgPanel, JScrollPane.VERTICAL_SCROLLBAR_NEVER, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
		setContentPane(scrPanel);
		addComponentListener(new ResizeListener());
	}

	public void toggleFullScreen () {
		GraphicsDevice dev = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
		if (dev.isFullScreenSupported()) {
			if (dev.getFullScreenWindow() == null) {
				dev.setFullScreenWindow(this);
			} else {
				dev.setFullScreenWindow(null);
			}
		} else {
			dispose();
			if (isUndecorated()) {
				setUndecorated(false);
			} else {
				setUndecorated(true);
				setLocation(0, 0);
				DisplayMode mode = dev.getDisplayMode();
				setSize(mode.getWidth(), mode.getHeight());
			}
			show();
		}
	}

	public void scroll (int dx, int dy) {
		Rectangle r = new Rectangle(imgPanel.getVisibleRect());
		r.x += dx;
		r.y += dy;
		imgPanel.scrollRectToVisible(r);
	}

	public void zoom1to1 () {
		imgPanel.setZoom(1.0);
	}

	public void zoomIn () {
		imgPanel.setZoom(imgPanel.getZoom() * ZOOM_FACTOR);
	}

	public void zoomOut () {
		imgPanel.setZoom(imgPanel.getZoom() / ZOOM_FACTOR);
	}

	public void rotateCW () {
		imgPanel.setRotation(imgPanel.getRotation() + 1);
		fitInFrame();
	}

	public void rotateCCW () {
		imgPanel.setRotation(imgPanel.getRotation() - 1);
		fitInFrame();
	}

	public void fitInFrame () {
		JViewport vp = scrPanel.getViewport();
		imgPanel.zoomTo(vp.getWidth(), vp.getHeight());
	}

	public void showImage (ImageEntry entry, int imgIndex, int noOfImgs) {
		this.entry = entry;
		StringBuffer newTitle = new StringBuffer();
		newTitle.append(entry.getURL().getFile());
		newTitle.append(" : ");
		if (entry.getImage() != null) {
			newTitle.append(entry.getImage().getWidth());
			newTitle.append("x");
			newTitle.append(entry.getImage().getHeight());
		} else {
			newTitle.append("could not load");
		}
		newTitle.append(" : [" + (imgIndex+1) + " of " + noOfImgs + "]");
		setTitle(newTitle.toString());

		if (!isVisible()) {
			pack();
			show();
		}

		imgPanel.setImage(entry.getImage());
		imgPanel.setRotation(0);
		fitInFrame();
	}

	public void toggleDate () {
		if (imgPanel.getWhatever() == null){
			imgPanel.setWhatever(dateFormat.format(entry.getDate()));
		} else {
			imgPanel.setWhatever(null);
		}
	}

	private class ResizeListener extends ComponentAdapter {
		public void componentResized (ComponentEvent e) {
			fitInFrame();
		}
	}

}