package ij.gui;
import java.awt.*;
import java.awt.image.*;
import java.util.Properties;
import java.awt.event.*;
import ij.*;
import ij.process.*;
import ij.io.*;
import ij.measure.*;
import ij.plugin.frame.*;
import ij.plugin.PointToolOptions;
import ij.macro.Interpreter;
import ij.util.*;

/** A frame for displaying images. */
public class ImageWindow extends Frame implements FocusListener, WindowListener, WindowStateListener, MouseWheelListener {

	public static final int MIN_WIDTH = 128;
	public static final int MIN_HEIGHT = 32;
	public static final int HGAP = 5;
	public static final int VGAP = 5;
	public static final String LOC_KEY = "image.loc";
	
	protected ImagePlus imp;
	protected ImageJ ij;
	protected ImageCanvas ic;
	private double initialMagnification = 1;
	private int newWidth, newHeight;
	protected boolean closed;
	private boolean newCanvas;
	private boolean unzoomWhenMinimizing = true;
	Rectangle maxWindowBounds; // largest possible window on this screen
	Rectangle maxBounds; // Size of this window after it is maximized
	long setMaxBoundsTime;
	private int sliderHeight;

	private static final int XINC = 12;
	private static final int YINC = 16;
	private final double SCALE = Prefs.getGuiScale();
	private int TEXT_GAP = 11;
	private static int xbase = -1;
	private static int ybase;
	private static int xloc;
	private static int yloc;
	private static int count;
	private static boolean centerOnScreen;
	private static Point nextLocation;
	public static long setMenuBarTime;	
	private int textGap = centerOnScreen?0:TEXT_GAP;
	private Point initialLoc;
	private int screenHeight, screenWidth;

	
	/** This variable is set false if the user presses the escape key or closes the window. */
	public boolean running;
	
	/** This variable is set false if the user clicks in this
		window, presses the escape key, or closes the window. */
	public boolean running2;
	
	public ImageWindow(String title) {
		super(title);
	}

	public ImageWindow(ImagePlus imp) {
		this(imp, null);
	}

	public ImageWindow(ImagePlus imp, ImageCanvas ic) {
		super(imp.getTitle());
		if (SCALE>1.0) {
			TEXT_GAP = (int)(TEXT_GAP*SCALE);
			textGap = centerOnScreen?0:TEXT_GAP;
		}
		if (Prefs.blackCanvas && getClass().getName().equals("ij.gui.ImageWindow")) {
			setForeground(Color.white);
			setBackground(Color.black);
		} else {
			setForeground(Color.black);
		if (IJ.isLinux())
			setBackground(ImageJ.backgroundColor);
		else
			setBackground(Color.white);
		}
		boolean openAsHyperStack = imp.getOpenAsHyperStack();
		ij = IJ.getInstance();
		this.imp = imp;
		if (ic==null) {
			ic = (this instanceof PlotWindow) ? new PlotCanvas(imp) : new ImageCanvas(imp);
			newCanvas=true;
		}
		this.ic = ic;
		ImageWindow previousWindow = imp.getWindow();
		setLayout(new ImageLayout(ic));
		add(ic);
 		addFocusListener(this);
 		addWindowListener(this);
 		addWindowStateListener(this);
 		addKeyListener(ij);
		setFocusTraversalKeysEnabled(false);
		if (!(this instanceof StackWindow))
			addMouseWheelListener(this);
		setResizable(true);
		if (!(this instanceof HistogramWindow&&IJ.isMacro()&&Interpreter.isBatchMode())) {
			WindowManager.addWindow(this);
			imp.setWindow(this);
		}
		if (previousWindow!=null) {
			if (newCanvas)
				setLocationAndSize(false);
			else
				ic.update(previousWindow.getCanvas());
			Point loc = previousWindow.getLocation();
			setLocation(loc.x, loc.y);
			if (!(this instanceof StackWindow || this instanceof PlotWindow)) { //layout now unless components will be added later
				pack();
				if (IJ.isMacro())
					imp.setDeactivated(); //prepare for waitTillActivated (imp may have been activated before if it gets a new Window now)
				show();
			}
			if (ic.getMagnification()!=0.0)
				imp.setTitle(imp.getTitle());
			boolean unlocked = imp.lockSilently();
			boolean changes = imp.changes;
			imp.changes = false;
			previousWindow.close();
			imp.changes = changes;
			if (unlocked)
				imp.unlock();
			if (this.imp!=null)
				this.imp.setOpenAsHyperStack(openAsHyperStack);
			WindowManager.setCurrentWindow(this);
		} else {
			setLocationAndSize(false);
			if (ij!=null && !IJ.isMacintosh()) {
				Image img = ij.getIconImage();
				if (img!=null) try {
					setIconImage(img);
				} catch (Exception e) {}
			}
			if (nextLocation!=null)
				setLocation(nextLocation);
			else if (centerOnScreen)
				GUI.center(this);
			nextLocation = null;
			centerOnScreen = false;
			if (Interpreter.isBatchMode() || (IJ.getInstance()==null&&this instanceof HistogramWindow)) {
				WindowManager.setTempCurrentImage(imp);
				Interpreter.addBatchModeImage(imp);
			} else {
				if (IJ.isMacro())
					imp.setDeactivated(); //prepare for waitTillActivated (imp may have been activated previously and gets a new Window now)
				show();
			}
		}
	}

	private void setLocationAndSize(boolean updating) {
		if (imp==null)
			return;
		int width = imp.getWidth();
		int height = imp.getHeight();
		
		// load prefernces file location
		Point loc = Prefs.getLocation(LOC_KEY);
		Rectangle bounds = null;
		if (loc!=null) {
			bounds = GUI.getMaxWindowBounds(loc);
			if (bounds!=null && (loc.x>bounds.x+bounds.width/3||loc.y>bounds.y+bounds.height/3)
			&& (loc.x+width>bounds.x+bounds.width||loc.y+height>bounds.y+bounds.height)) {
				loc = null;
				bounds = null;
			}
		}		
		// if loc not valid, use screen bounds of visible window (this) or of main window (ij) if not visible yet (updating == false)
		Rectangle maxWindow = bounds!=null?bounds:GUI.getMaxWindowBounds(updating?this: ij);  

		if (WindowManager.getWindowCount()<=1)
			xbase = -1;
		if (width>maxWindow.width/2 && xbase>maxWindow.x+5+XINC*6)
			xbase = -1;
		if (xbase==-1) {
			count = 0;
			if (loc!=null) {
				xbase = loc.x;
				ybase = loc.y;
			} else if (ij!=null) {
				Rectangle ijBounds = ij.getBounds();
				if (ijBounds.y-maxWindow.x<maxWindow.height/8) {
					xbase = ijBounds.x;
					if (xbase+width>maxWindow.x+maxWindow.width) {
						xbase = maxWindow.x+maxWindow.width - width - 10;
						if (xbase<maxWindow.x)
							xbase = maxWindow.x + 5;;
					}
					ybase = ijBounds.y + ijBounds.height + 5;
				} else {
					xbase = maxWindow.x + (maxWindow.width - width) / 2;
					ybase = maxWindow.y + (maxWindow.height - height) / 4;
				}
			} else {
				xbase = maxWindow.x + (maxWindow.width - width) / 2;
				ybase = maxWindow.y + (maxWindow.height - height) / 4;
			}
			xbase = Math.max(xbase, maxWindow.x);
			ybase = Math.max(ybase, maxWindow.y);
			if (IJ.debugMode) IJ.log("ImageWindow.xbase: "+xbase);
			xloc = xbase;
			yloc = ybase;
		}
		int x = xloc;
		int y = yloc;
		xloc += XINC;
		yloc += YINC;
		count++;
		if (count%6==0) {
			xloc = xbase;
			yloc = ybase;
		}

		screenHeight = maxWindow.y+maxWindow.height-sliderHeight;
		screenWidth = maxWindow.x+maxWindow.width;
		double mag = 1;
		if (!(this instanceof PlotWindow)) { // unless a plot (always at 100%), zoom out to show all of image
			while (xbase+width*mag>screenWidth || ybase+height*mag>=screenHeight) {
				double mag2 = ImageCanvas.getLowerZoomLevel(mag);
				if (mag2==mag) break;
				mag = mag2;
			}
		}
		
		if (mag<1.0) {
			initialMagnification = mag;
			ic.setSize((int)(width*mag), (int)(height*mag));
		}
		ic.setMagnification(mag);
		if (y+height*mag>screenHeight)
			y = ybase;
		if (Prefs.open100Percent && ic.getMagnification()<1.0) {
			while(ic.getMagnification()<1.0)
				ic.zoomIn(0, 0);
			setSize(Math.min(width, screenWidth-x), Math.min(height, screenHeight-y));
			validate();
		} else 
			pack();
		if (!updating) {
			setLocation(x, y);
			initialLoc = new Point(x,y);
		}
	}

	Rectangle getMaxWindow(int xloc, int yloc) {
		return GUI.getMaxWindowBounds(new Point(xloc, yloc));
	}

	public double getInitialMagnification() {
		return initialMagnification;
	}

	/** Override Container getInsets() to make room for some text above the image. */
	public Insets getInsets() {
		Insets insets = super.getInsets();
		if (imp==null)
			return insets;
		double mag = ic.getMagnification();
		int extraWidth = (int)((MIN_WIDTH - imp.getWidth()*mag)/2.0);
		if (extraWidth<0) extraWidth = 0;
		int extraHeight = (int)((MIN_HEIGHT - imp.getHeight()*mag)/2.0);
		if (extraHeight<0) extraHeight = 0;
		insets = new Insets(insets.top+textGap+extraHeight, insets.left+extraWidth, insets.bottom+extraHeight, insets.right+extraWidth);
		return insets;
	}

	/** Draws the subtitle. */
	public void drawInfo(Graphics g) {
		if (imp==null)
			return;
		if (textGap!=0) {
			Insets insets = super.getInsets();
			Color savec = null;
			if (imp.isComposite()) {
				CompositeImage ci = (CompositeImage)imp;
				if (ci.getMode()==IJ.COMPOSITE) {
					savec = g.getColor();
					Color c = ci.getChannelColor();
					if (Color.green.equals(c))
						c = new Color(0,180,0);
					g.setColor(c);
				}
			}
			Java2.setAntialiasedText(g, true);			
			if (SCALE>1.0) {
				Font font = new Font("SansSerif", Font.PLAIN, (int)(12*SCALE));
				g.setFont(font);
			}
			g.drawString(createSubtitle(), insets.left+5, insets.top+TEXT_GAP);
			if (savec!=null)
				g.setColor(savec);
		}
	}

	/** Creates the subtitle. */
	public String createSubtitle() {
		String s="";
		if (imp==null)
			return s;
		int stackSize = imp.getStackSize();
		if (stackSize>1) {
			ImageStack stack = imp.getStack();
			int currentSlice = imp.getCurrentSlice();
			s += currentSlice+"/"+stackSize;
			String label = stack.getShortSliceLabel(currentSlice);
			if (label!=null && label.length()>0) {
				if (imp.isHyperStack()) label = label.replace(';', ' ');
				s += " (" + label + ")";
			}
			if ((this instanceof StackWindow) && running2) {
				return s;
			}
			s += "; ";
		} else {
			String label = imp.getProp("Slice_Label");
			if (label==null && imp.isStack())
				label = imp.getStack().getSliceLabel(1);
			if (label!=null && label.length()>0) {
				int newline = label.indexOf('\n');
				if (newline>0)
					label = label.substring(0, newline);
				int len = label.length();
				if (len>4 && label.charAt(len-4)=='.' && !Character.isDigit(label.charAt(len-1)))
					label = label.substring(0,len-4);
				if (label.length()>60)
					label = label.substring(0, 60)+"...";
				s = "\""+label + "\"; ";
			}
		}
		int type = imp.getType();
		Calibration cal = imp.getCalibration();
		if (cal.scaled()) {
			boolean unitsMatch = cal.getXUnit().equals(cal.getYUnit());
			double cwidth = imp.getWidth()*cal.pixelWidth;
			double cheight = imp.getHeight()*cal.pixelHeight;
			int digits = Tools.getDecimalPlaces(cwidth, cheight);
			if (digits>2) digits=2;
			if (unitsMatch) {
				s += IJ.d2s(cwidth,digits) + "x" + IJ.d2s(cheight,digits)
					+ " " + cal.getUnits() + " (" + imp.getWidth() + "x" + imp.getHeight() + "); ";
			} else {
				s += d2s(cwidth) + " " + cal.getXUnit() + " x "
					+ d2s(cheight) + " " + cal.getYUnit()
					+ " (" + imp.getWidth() + "x" + imp.getHeight() + "); ";
			}
		} else
			s += imp.getWidth() + "x" + imp.getHeight() + " pixels; ";
		switch (type) {
			case ImagePlus.GRAY8:
			case ImagePlus.COLOR_256:
				s += "8-bit";
				break;
			case ImagePlus.GRAY16:
				s += "16-bit";
				break;
			case ImagePlus.GRAY32:
				s += "32-bit";
				break;
			case ImagePlus.COLOR_RGB:
				s += imp.isRGB() ? "RGB" :  "32-bit (int)";
				break;
		}
		if (imp.isInvertedLut())
			s += " (inverting LUT)";
	 	return s+"; "+getImageSize(imp);
	}
	
	public static String getImageSize(ImagePlus imp) {
		if (imp==null)
			return null;
		double size = imp.getSizeInBytes()/1024.0;
   		String s2=null, s3=null;
		if (size<1024.0)
			{s2=IJ.d2s(size,0); s3="K";}
		else if (size<10000.0)
	 		{s2=IJ.d2s(size/1024.0,1); s3="MB";}
		else if (size<1048576.0)
			{s2=IJ.d2s(Math.round(size/1024.0),0); s3="MB";}
	   	else
			{s2=IJ.d2s(size/1048576.0,1); s3="GB";}
		if (s2.endsWith(".0")) s2 = s2.substring(0, s2.length()-2);
		return s2+s3;
	}
    
    private String d2s(double n) {
		int digits = Tools.getDecimalPlaces(n);
		if (digits>2) digits=2;
		return IJ.d2s(n,digits);
    }

    public void paint(Graphics g) {
		drawInfo(g);
		Rectangle r = ic.getBounds();
		int extraWidth = MIN_WIDTH - r.width;
		int extraHeight = MIN_HEIGHT - r.height;
		if (extraWidth<=0 && extraHeight<=0 && !Prefs.noBorder && !IJ.isLinux())
			g.drawRect(r.x-1, r.y-1, r.width+1, r.height+1);
    }
    
	/** Removes this window from the window list and disposes of it.
		Returns false if the user cancels the "save changes" dialog. */
	public boolean close() {
		boolean isRunning = running || running2;
		running = running2 = false;
		if (imp==null) return true;
		boolean virtual = imp.getStackSize()>1 && imp.getStack().isVirtual();
		if (isRunning) IJ.wait(500);
		if (imp==null) return true;
		boolean changes = imp.changes;
		Roi roi = imp.getRoi();
		if (roi!=null && (roi instanceof PointRoi) && ((PointRoi)roi).promptBeforeDeleting())
			changes = true;
		if (ij==null || ij.quittingViaMacro() || IJ.getApplet()!=null || Interpreter.isBatchMode() || IJ.macroRunning() || virtual)
			changes = false;
		if (changes) {
			String msg;
			String name = imp.getTitle();
			if (name.length()>22)
				msg = "Save changes to\n" + "\"" + name + "\"?";
			else
				msg = "Save changes to \"" + name + "\"?";
			if (imp.isLocked())
				msg += "\nWARNING: This image is locked.\nProbably, processing is unfinished (slow or still previewing).";
			toFront();
			YesNoCancelDialog d = new YesNoCancelDialog(this, "ImageJ", msg);
			if (d.cancelPressed())
				return false;
			else if (d.yesPressed()) {
				FileSaver fs = new FileSaver(imp);
				if (!fs.save()) return false;
			}
		}
		closed = true;
		if (WindowManager.getWindowCount()==0) {
			xloc = 0;
			yloc = 0;
		}
		WindowManager.removeWindow(this);
		if (ij!=null && ij.quitting())  // this may help avoid thread deadlocks
			return true;
		Rectangle bounds = getBounds();
		if (initialLoc!=null && !bounds.equals(initialLoc) && !IJ.isMacro()
		&& bounds.y<screenHeight/3 && (bounds.y+bounds.height)<=screenHeight
		&& (bounds.x+bounds.width)<=screenWidth) {
			Prefs.saveLocation(LOC_KEY, new Point(bounds.x,bounds.y));
			xbase = -1;
		}
		dispose();
		if (imp!=null)
			imp.flush();
		imp = null;
		return true;
	}
	
	public ImagePlus getImagePlus() {
		return imp;
	}

	public void setImage(ImagePlus imp2) {
		ImageCanvas ic = getCanvas();
		if (ic==null || imp2==null)
			return;
		imp = imp2;
		imp.setWindow(this);
		ic.updateImage(imp);
		ic.setImageUpdated();
		ic.repaint();
		repaint();
	}
	
	public void updateImage(ImagePlus imp) {
        if (imp!=this.imp)
            throw new IllegalArgumentException("imp!=this.imp");
		this.imp = imp;
        ic.updateImage(imp);
        setLocationAndSize(true);
        if (this instanceof StackWindow) {
        	StackWindow sw = (StackWindow)this;
        	int stackSize = imp.getStackSize();
        	int nScrollbars = sw.getNScrollbars();
        	if (stackSize==1 && nScrollbars>0)
        		sw.removeScrollbars();
        	else if (stackSize>1 && nScrollbars==0)
        		sw.addScrollbars(imp);
        }
        pack();
		repaint();
		maxBounds = getMaximumBounds();
		setMaximizedBounds(maxBounds);
		setMaxBoundsTime = System.currentTimeMillis();
	}

	public ImageCanvas getCanvas() {
		return ic;
	}
	

	static ImagePlus getClipboard() {
		return ImagePlus.getClipboard();
	}
	
	public Rectangle getMaximumBounds() {
		Rectangle maxWindow = GUI.getMaxWindowBounds(this);
		if (imp==null)
			return maxWindow;
		double width = imp.getWidth();
		double height = imp.getHeight();
		double iAspectRatio = width/height;
		maxWindowBounds = maxWindow;
		if (iAspectRatio/((double)maxWindow.width/maxWindow.height)>0.75) {
			maxWindow.y += 22;  // uncover ImageJ menu bar
			maxWindow.height -= 22;
		}
		Dimension extraSize = getExtraSize();
		double maxWidth = maxWindow.width-extraSize.width;
		double maxHeight = maxWindow.height-extraSize.height;
		double mAspectRatio = maxWidth/maxHeight;
		int wWidth, wHeight;
		double mag;
		if (iAspectRatio>=mAspectRatio) {
			mag = maxWidth/width;
			wWidth = maxWindow.width;
			wHeight = (int)(height*mag+extraSize.height);
		} else {
			mag = maxHeight/height;
			wHeight = maxWindow.height;
			wWidth = (int)(width*mag+extraSize.width);
		}
		int xloc = (int)(maxWidth-wWidth)/2;
		if (xloc<maxWindow.x) xloc = maxWindow.x;
		wWidth = Math.min(wWidth, maxWindow.x-xloc+maxWindow.width);
		wHeight = Math.min(wHeight, maxWindow.height);
		return new Rectangle(xloc, maxWindow.y, wWidth, wHeight);
	}
	
	Dimension getExtraSize() {
		Insets insets = getInsets();
		int extraWidth = insets.left+insets.right + 10;
		int extraHeight = insets.top+insets.bottom + 10;
		if (extraHeight==20) extraHeight = 42;
		int members = getComponentCount();
		for (int i=1; i<members; i++) {
		    Component m = getComponent(i);
		    Dimension d = m.getPreferredSize();
			extraHeight += d.height + 5;
			if (IJ.debugMode) IJ.log(i+"  "+d.height+" "+extraHeight);
		}
		return new Dimension(extraWidth, extraHeight);
	}

	public Component add(Component comp) {
		comp = super.add(comp);
		maxBounds = getMaximumBounds();
		setMaximizedBounds(maxBounds);
		setMaxBoundsTime = System.currentTimeMillis();
		return comp;
	}
	
	public void maximize() {
		if (GenericDialog.getInstance()!=null && IJ.isMacOSX() && IJ.isJava18())
			return; // workaround for OSX/Java 8 maximize bug 
		Rectangle rect = getMaximumBounds();
		if (IJ.debugMode) IJ.log("maximize: "+rect);
		setLocationAndSize(rect.x, rect.y, rect.width, rect.height);
	}
	
	public void minimize() {
		if (IJ.debugMode) IJ.log("minimize: "+unzoomWhenMinimizing);
		if (unzoomWhenMinimizing)
			ic.unzoom();
		unzoomWhenMinimizing = true;
	}

	/** Has this window been closed? */
	public boolean isClosed() {
		return closed;
	}
	
	public void focusGained(FocusEvent e) {
		if (!Interpreter.isBatchMode() && ij!=null && !ij.quitting() && imp!=null) {
			if (IJ.debugMode) IJ.log("focusGained: "+imp);
			WindowManager.setCurrentWindow(this);
		}
	}

	public void windowActivated(WindowEvent e) {
		if (IJ.debugMode) IJ.log("windowActivated: "+imp.getTitle());
		if (IJ.isMacOSX())
			setImageJMenuBar(this);
		if (imp==null)
			return;
		ImageJ ij = IJ.getInstance();
		if (ij!=null && !closed && !ij.quitting() && !Interpreter.isBatchMode())
			WindowManager.setCurrentWindow(this);
		Roi roi = imp.getRoi();
		if (roi!=null && (roi instanceof PointRoi))
			PointToolOptions.update();
		if (imp.isComposite())
			Channels.updateChannels();
		imp.setActivated(); // notify ImagePlus that image has been activated
	}
	
	public void windowClosing(WindowEvent e) {
		if (closed)
			return;
		if (ij!=null) {
			WindowManager.setCurrentWindow(this);
			IJ.doCommand("Close");
		} else {
			dispose();
			WindowManager.removeWindow(this);
		}
	}
	
	public void windowStateChanged(WindowEvent e) {
		int oldState = e.getOldState();
		int newState = e.getNewState();
		if (IJ.debugMode) IJ.log("windowStateChanged: "+oldState+" "+newState);
		if ((oldState&Frame.MAXIMIZED_BOTH)==0 && (newState&Frame.MAXIMIZED_BOTH)!=0)
			maximize();
	}

	public void windowClosed(WindowEvent e) {}
	public void windowDeactivated(WindowEvent e) {}
	public void focusLost(FocusEvent e) {}
	public void windowDeiconified(WindowEvent e) {}
	public void windowIconified(WindowEvent e) {}	
	public void windowOpened(WindowEvent e) {}
	
	public synchronized void mouseWheelMoved(MouseWheelEvent e) {
		int rotation = e.getWheelRotation();
		int amount = e.getScrollAmount();
		boolean ctrl = (e.getModifiers()&Event.CTRL_MASK)!=0;
		if (IJ.debugMode) {
			IJ.log("mouseWheelMoved: "+e);
			IJ.log("  type: "+e.getScrollType());
			IJ.log("  ctrl: "+ctrl);
			IJ.log("  rotation: "+rotation);
			IJ.log("  amount: "+amount);
		}
		if (amount<1) amount=1;
		if (rotation==0)
			return;
		int width = imp.getWidth();
		int height = imp.getHeight();
		Rectangle srcRect = ic.getSrcRect();
		int xstart = srcRect.x;
		int ystart = srcRect.y;
		if ((ctrl||IJ.shiftKeyDown()) && ic!=null) {
			Point loc = ic.getCursorLoc();
			int x = ic.screenX(loc.x);
			int y = ic.screenY(loc.y);
			if (rotation<0)
				ic.zoomIn(x, y);
			else
				ic.zoomOut(x, y);
			return;
		} else if (IJ.spaceBarDown() || srcRect.height==height) {
			srcRect.x += rotation*amount*Math.max(width/200, 1);
			if (srcRect.x<0) srcRect.x = 0;
			if (srcRect.x+srcRect.width>width) srcRect.x = width-srcRect.width;
		} else {
			srcRect.y += rotation*amount*Math.max(height/200, 1);
			if (srcRect.y<0) srcRect.y = 0;
			if (srcRect.y+srcRect.height>height) srcRect.y = height-srcRect.height;
		}
		if (srcRect.x!=xstart || srcRect.y!=ystart)
			ic.repaint();
	}

	/** Copies the current ROI to the clipboard. The entire
	    image is copied if there is no ROI. */
	public void copy(boolean cut) {
		imp.copy(cut);
    }
                

	public void paste() {
		imp.paste();
    }
                
    /** This method is called by ImageCanvas.mouseMoved(MouseEvent). 
    	@see ij.gui.ImageCanvas#mouseMoved
    */
    public void mouseMoved(int x, int y) {
    	imp.mouseMoved(x, y);
    }
    
    public String toString() {
    	return imp!=null?imp.getTitle():"";
    }
    
    /** Causes the next image to be opened to be centered on the screen
    	and displayed without informational text above the image. */
    public static void centerNextImage() {
    	centerOnScreen = true;
    }
    
    /** Causes the next image to be displayed at the specified location. */
    public static void setNextLocation(Point loc) {
    	nextLocation = loc;
    }

    /** Causes the next image to be displayed at the specified location. */
    public static void setNextLocation(int x, int y) {
    	nextLocation = new Point(x, y);
    }

    /** Moves and resizes this window. Changes the 
    	 magnification so the image fills the window. */
    public void setLocationAndSize(int x, int y, int width, int height) {
		setBounds(x, y, width, height);
		getCanvas().fitToWindow();
		initialLoc = null;
		pack();
	}
	
    @Override
    public void setLocation(int x, int y) {
    	super.setLocation(x, y);
		initialLoc = null;
	}

	public void setSliderHeight(int height) {
		sliderHeight = height;
	}
	
	public int getSliderHeight() {
		return sliderHeight;
	}
	
	public static void setImageJMenuBar(ImageWindow win) {
		ImageJ ij = IJ.getInstance();
		boolean setMenuBar = true;
		ImagePlus imp = win.getImagePlus();
		if (imp!=null)
			setMenuBar = imp.setIJMenuBar();
		MenuBar mb = Menus.getMenuBar();
		if (mb!=null && mb==win.getMenuBar())
			setMenuBar = false;
		setMenuBarTime = 0L;
		if (setMenuBar && ij!=null && !ij.quitting() && !Interpreter.nonBatchMacroRunning()) {
			IJ.wait(10); // may be needed for Java 1.4 on OS X
			long t0 = System.currentTimeMillis();
			win.setMenuBar(mb);
			long time = System.currentTimeMillis()-t0;
			setMenuBarTime = time;
			Menus.setMenuBarCount++;
			if (IJ.debugMode) IJ.log("setMenuBar: "+time+"ms ("+Menus.setMenuBarCount+")");
			if (time>2000L)
				Prefs.setIJMenuBar = false;
		}
		if (imp!=null) imp.setIJMenuBar(true);
	}
			
} //class ImageWindow
