ij.gui
Class ImageCanvas

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          ij.gui.ImageCanvas

All Implemented Interfaces:

java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, javax.accessibility.Accessible

public class ImageCanvas
extends java.awt.Canvas
implements java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.lang.Cloneable

This is a Canvas used to display images in a Window.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.awt.Canvas

java.awt.Canvas.AccessibleAWTCanvas

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

protected static java.awt.Cursor	crosshairCursor
protected static java.awt.Cursor	defaultCursor
protected int	dstHeight
protected int	dstWidth
protected int	flags
protected static java.awt.Cursor	handCursor
protected ImageJ	ij
protected int	imageHeight
protected boolean	imageUpdated
protected int	imageWidth
protected ImagePlus	imp
protected double	magnification
protected static java.awt.Cursor	moveCursor
protected java.awt.Rectangle	srcRect
static boolean	usePointer
protected int	xMouse
protected int	xMouseStart
protected int	xSrcStart
protected int	yMouse
protected int	yMouseStart
protected int	ySrcStart

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

ImageCanvas(ImagePlus imp)

Method Summary

protected java.awt.Dimension	canEnlarge(int newWidth, int newHeight)
void	disablePopupMenu(boolean status) Disable/enable popup menu.
java.awt.Point	getCursorLoc() Returns the current cursor location.
static double	getHigherZoomLevel(double currentMag)
static double	getLowerZoomLevel(double currentMag)
double	getMagnification()
int	getModifiers() Returns the mouse event modifiers.
java.awt.Dimension	getPreferredSize()
boolean	getShowAllROIs()
java.awt.Rectangle	getSrcRect()
protected void	handlePopupMenu(java.awt.event.MouseEvent e)
void	mouseClicked(java.awt.event.MouseEvent e)
void	mouseDragged(java.awt.event.MouseEvent e)
void	mouseEntered(java.awt.event.MouseEvent e)
void	mouseExited(java.awt.event.MouseEvent e)
void	mouseMoved(java.awt.event.MouseEvent e)
void	mousePressed(java.awt.event.MouseEvent e)
void	mouseReleased(java.awt.event.MouseEvent e)
int	offScreenX(int sx) Converts a screen x-coordinate to an offscreen x-coordinate.
double	offScreenXD(int sx) Converts a screen x-coordinate to a floating-point offscreen x-coordinate.
int	offScreenY(int sy) Converts a screen y-coordinate to an offscreen y-coordinate.
double	offScreenYD(int sy) Converts a screen y-coordinate to a floating-point offscreen y-coordinate.
void	paint(java.awt.Graphics g)
int	screenX(int ox) Converts an offscreen x-coordinate to a screen x-coordinate.
int	screenXD(double ox) Converts a floating-point offscreen x-coordinate to a screen x-coordinate.
int	screenY(int oy) Converts an offscreen y-coordinate to a screen y-coordinate.
int	screenYD(double oy) Converts a floating-point offscreen x-coordinate to a screen x-coordinate.
protected void	scroll(int sx, int sy)
void	setCursor(int sx, int sy, int ox, int oy) Sets the cursor based on the current tool and cursor location.
protected void	setDrawingColor(int ox, int oy, boolean setBackground)
void	setDrawingSize(int width, int height)
void	setImageUpdated() ImagePlus.updateAndDraw calls this method to get paint to update the image from the ImageProcessor.
void	setMagnification(double magnification)
void	setShowAllROIs(boolean showAllROIs)
void	setShowCursorStatus(boolean status) Called by IJ.showStatus() to prevent status bar text from being overwritten until the cursor moves at least 12 pixels.
protected void	setupScroll(int ox, int oy)
void	unzoom()
void	update(java.awt.Graphics g)
void	zoomIn(int x, int y) Zooms in by making the window bigger.
void	zoomOut(int x, int y) Zooms out by making the source rectangle (srcRect) larger and centering it on (x,y).

Methods inherited from class java.awt.Canvas

addNotify, createBufferStrategy, createBufferStrategy, getAccessibleContext, getBufferStrategy

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMinimumSize, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, paramString, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

defaultCursor

protected static java.awt.Cursor defaultCursor

handCursor

protected static java.awt.Cursor handCursor

moveCursor

protected static java.awt.Cursor moveCursor

crosshairCursor

protected static java.awt.Cursor crosshairCursor

usePointer

public static boolean usePointer

imp

protected ImagePlus imp

imageUpdated

protected boolean imageUpdated

srcRect

protected java.awt.Rectangle srcRect

imageWidth

protected int imageWidth

imageHeight

protected int imageHeight

xMouse

protected int xMouse

yMouse

protected int yMouse

ij

protected ImageJ ij

magnification

protected double magnification

dstWidth

protected int dstWidth

dstHeight

protected int dstHeight

xMouseStart

protected int xMouseStart

yMouseStart

protected int yMouseStart

xSrcStart

protected int xSrcStart

ySrcStart

protected int ySrcStart

flags

protected int flags

Constructor Detail

ImageCanvas

public ImageCanvas(ImagePlus imp)

Method Detail

setDrawingSize

public void setDrawingSize(int width,
                           int height)

setImageUpdated

public void setImageUpdated()

ImagePlus.updateAndDraw calls this method to get paint to update the image from the ImageProcessor.

update

public void update(java.awt.Graphics g)

Overrides:

update in class java.awt.Canvas

paint

public void paint(java.awt.Graphics g)

Overrides:

paint in class java.awt.Canvas

getPreferredSize

public java.awt.Dimension getPreferredSize()

Overrides:

getPreferredSize in class java.awt.Component

getCursorLoc

public java.awt.Point getCursorLoc()

Returns the current cursor location.

getModifiers

public int getModifiers()

Returns the mouse event modifiers.

setCursor

public void setCursor(int sx,
                      int sy,
                      int ox,
                      int oy)

Sets the cursor based on the current tool and cursor location.

offScreenX

public int offScreenX(int sx)

Converts a screen x-coordinate to an offscreen x-coordinate.

offScreenY

public int offScreenY(int sy)

Converts a screen y-coordinate to an offscreen y-coordinate.

offScreenXD

public double offScreenXD(int sx)

Converts a screen x-coordinate to a floating-point offscreen x-coordinate.

offScreenYD

public double offScreenYD(int sy)

Converts a screen y-coordinate to a floating-point offscreen y-coordinate.

screenX

public int screenX(int ox)

Converts an offscreen x-coordinate to a screen x-coordinate.

screenY

public int screenY(int oy)

Converts an offscreen y-coordinate to a screen y-coordinate.

screenXD

public int screenXD(double ox)

Converts a floating-point offscreen x-coordinate to a screen x-coordinate.

screenYD

public int screenYD(double oy)

Converts a floating-point offscreen x-coordinate to a screen x-coordinate.

getMagnification

public double getMagnification()

setMagnification

public void setMagnification(double magnification)

getSrcRect

public java.awt.Rectangle getSrcRect()

getLowerZoomLevel

public static double getLowerZoomLevel(double currentMag)

getHigherZoomLevel

public static double getHigherZoomLevel(double currentMag)

zoomIn

public void zoomIn(int x,
                   int y)

Zooms in by making the window bigger. If it can't be made bigger, then make the source rectangle (srcRect) smaller and center it at (x,y).

canEnlarge

protected java.awt.Dimension canEnlarge(int newWidth,
                                        int newHeight)

zoomOut

public void zoomOut(int x,
                    int y)

Zooms out by making the source rectangle (srcRect) larger and centering it on (x,y). If we can't make it larger, then make the window smaller.

unzoom

public void unzoom()

scroll

protected void scroll(int sx,
                      int sy)

setDrawingColor

protected void setDrawingColor(int ox,
                               int oy,
                               boolean setBackground)

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

Specified by:

mousePressed in interface java.awt.event.MouseListener

setupScroll

protected void setupScroll(int ox,
                           int oy)

handlePopupMenu

protected void handlePopupMenu(java.awt.event.MouseEvent e)

mouseExited

public void mouseExited(java.awt.event.MouseEvent e)

Specified by:

mouseExited in interface java.awt.event.MouseListener

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent e)

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

disablePopupMenu

public void disablePopupMenu(boolean status)

Disable/enable popup menu.

setShowAllROIs

public void setShowAllROIs(boolean showAllROIs)

getShowAllROIs

public boolean getShowAllROIs()

setShowCursorStatus

public void setShowCursorStatus(boolean status)

Called by IJ.showStatus() to prevent status bar text from being overwritten until the cursor moves at least 12 pixels.

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

Specified by:

mouseReleased in interface java.awt.event.MouseListener

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent e)

Specified by:

mouseMoved in interface java.awt.event.MouseMotionListener

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent e)

Specified by:

mouseClicked in interface java.awt.event.MouseListener

mouseEntered

public void mouseEntered(java.awt.event.MouseEvent e)

Specified by:

mouseEntered in interface java.awt.event.MouseListener