Class Line

Method Details

• create

  public static Line create(double x1, double y1, double x2, double y2)

  Creates a new straight line selection using the specified starting and ending offscreen coordinates.

• grow

  protected void grow(int sx, int sy)

  Overrides:

  grow in class Roi

• mouseMoved

  public void mouseMoved(MouseEvent e)

  Overrides:

  mouseMoved in class Roi

• handleMouseUp

  protected void handleMouseUp(int screenX, int screenY)

  Overrides:

  handleMouseUp in class Roi

• drawLine

  protected void drawLine(int sx, int sy)

• moveHandle

  protected void moveHandle(int sx, int sy)

  Overrides:

  moveHandle in class Roi

• mouseDownInHandle

  protected void mouseDownInHandle(int handle, int sx, int sy)

  Overrides:

  mouseDownInHandle in class Roi

• draw

  public void draw(Graphics g)

  Draws this line on the image.

  Overrides:

  draw in class Roi

• showStatus

  public void showStatus()

  Overrides:

  showStatus in class Roi

• getAngle

  public double getAngle()

  Description copied from class: Roi

  Overridden by PolygonRoi (angle between first two points), TextRoi (text angle) and Line (line angle).

  Overrides:

  getAngle in class Roi

• getLength

  public double getLength()

  Returns the length of this line.

  Overrides:

  getLength in class Roi

• getRawLength

  public double getRawLength()

  Returns the length of this line in pixels.

• getPixels

  public double[] getPixels()

  Returns the pixel values along this line. The line roi must have an associated ImagePlus

• getPoints

  public Polygon getPoints()

  Returns, as a Polygon, the two points that define this line.

• getFloatPoints

  public FloatPolygon getFloatPoints()

  Returns, as a FloatPolygon, the two points that define this line.

• getPolygon

  public Polygon getPolygon()

  If the width of this line is less than or equal to one, returns the starting and ending coordinates as a 2-point Polygon, or, if the width is greater than one, returns an outline of the line as a 4-point Polygon.

  Overrides:

  getPolygon in class Roi

  See Also:

  • getFloatPolygon()
  • getPoints()

• getFloatPolygon

  public FloatPolygon getFloatPolygon()

  If the width of this line is less than or equal to one, returns the starting and ending coordinates as a 2-point FloatPolygon, or, if the width is greater than one, returns an outline of the line as a 4-point FloatPolygon.

  Overrides:

  getFloatPolygon in class Roi

  See Also:

  • getFloatPoints()

• getFloatPolygon

  public FloatPolygon getFloatPolygon(double strokeWidth)

  Obsolete

• size

  public int size()

  Returns the number of points in this selection; equivalent to getPolygon().npoints.

  Overrides:

  size in class Roi

• drawPixels

  public void drawPixels(ImageProcessor ip)

  If the width of this line is less than or equal to one, draws the line. Otherwise draws the outline of the area of this line.

  Overrides:

  drawPixels in class Roi

  See Also:

  • ImageProcessor.setColor(java.awt.Color)
  • ImageProcessor.setLineWidth(int)

• contains

  public boolean contains(int x, int y)

  Description copied from class: Roi

  Returns whether the center of pixel (x,y) is contained in the Roi. The position of a pixel center determines whether a pixel is selected. Points exactly at the left (right) border are considered outside (inside); points exactly on horizontal borders are considered outside (inside) at the border with the lower (higher) y. This convention is opposite to that of the java.awt.Shape class.

  Overrides:

  contains in class Roi

• handleMouseDown

  protected void handleMouseDown(int sx, int sy)

  Overrides:

  handleMouseDown in class Roi

• isHandle

  public int isHandle(int sx, int sy)

  Returns a handle number if the specified screen coordinates are inside or near a handle, otherwise returns -1.

  Overrides:

  isHandle in class Roi

• getWidth

  public static int getWidth()

  Returns the default line width. Use getStrokeWidth()to get the width of a Line instance.

  See Also:

  • Roi.getStrokeWidth()

• setWidth

  public static void setWidth(int w)

  Sets the default line width. Use setStrokeWidth() to set the width of a Line instance.

  See Also:

  • setStrokeWidth(float)

• setStrokeWidth

  public void setStrokeWidth(float width)

  Description copied from class: Roi

  Sets the width of the line used to draw this ROI. Set the width to 0.0 and the ROI will be drawn using a a 1 pixel stroke width regardless of the magnification.

  Overrides:

  setStrokeWidth in class Roi

  See Also:

  • Roi.setDefaultStrokeWidth(double)
  • Roi.setUnscalableStrokeWidth(double)
  • Roi.setStrokeColor(Color)
  • ImagePlus.setOverlay(ij.gui.Overlay)

• clipRectMargin

  protected int clipRectMargin()

  Overrides:

  clipRectMargin in class Roi

• nudgeCorner

  public void nudgeCorner(int key)

  Nudge end point of line by one pixel.

  Overrides:

  nudgeCorner in class Roi

• subPixelResolution

  public boolean subPixelResolution()

  Always returns true.

  Overrides:

  subPixelResolution in class Roi

• setLocation

  public void setLocation(int x, int y)

  Description copied from class: Roi

  Set the location of the ROI in image coordinates.

  Overrides:

  setLocation in class Roi

• setLocation

  public void setLocation(double x, double y)

  Sets the x coordinate of the leftmost and y coordinate of the topmost end point

  Overrides:

  setLocation in class Roi

• getRotationCenter

  public FloatPolygon getRotationCenter()

  Overrides:

  getRotationCenter in class Roi

• iterator

  public Iterator<Point> iterator()

  Description copied from class: Roi

  Required by the Iterable interface. Use to iterate over the contained coordinates. Usage example:

   for (Point p : roi) {
     // process p
   }
   

  Author: Wilhelm Burger

  Specified by:

  iterator in interface Iterable<Point>

  Overrides:

  iterator in class Roi

  See Also:

  • Roi.getContainedPoints()
  • Roi.getContainedFloatPoints()