Package diva.canvas.connector

Class Arrowhead

  • All Implemented Interfaces:
    ConnectorEnd
    public class Arrowhead
extends java.lang.Object
implements ConnectorEnd
    An arrowhead that is drawn on the end of a connector. This is a low-level utility class, not a self-contained Figure.
    Version:
    $Id$
    Author:
    John Reekie

    • Constructor Summary

      Constructors 
      Constructor Description
      Arrowhead()
      Create a new arrowhead at (0,0).
      Arrowhead​(double x, double y, double normal)
      Create a new arrowhead at the given point and with the given normal.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.awt.geom.Rectangle2D getBounds()
      Get the bounding box of the shape used to draw this connector end.
      void getConnection​(java.awt.geom.Point2D p)
      Get the connection point into the given point
      boolean getFlipped()
      Get the flag saying to flip the arrowhead.
      double getLength()
      Get the length.
      void getOrigin​(java.awt.geom.Point2D p)
      Get the origin into the given point.
      boolean isFilled()
      Test if the blob is filled or not.
      void paint​(java.awt.Graphics2D g)
      Paint the arrow-head.
      void reshape()
      Recalculate the shape of the decoration.
      void setFilled​(boolean flag)
      Set the flag that determines whether to fill the arrowhead.
      void setFlipped​(boolean flag)
      Set the flag that says the arrowhead is "flipped." This means that the arrowhead is drawn so that the apparent direction of the arrowhead is the same as its normal.
      void setLength​(double l)
      Set the length of the arrowhead.
      void setNormal​(double angle)
      Set the normal of the decoration.
      void setOrigin​(double x, double y)
      Set the origin of the decoration.
      void translate​(double x, double y)
      Translate the origin by the given amount.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • Arrowhead

        public Arrowhead()
        Create a new arrowhead at (0,0).

      • Arrowhead

        public Arrowhead​(double x,
                 double y,
                 double normal)
        Create a new arrowhead at the given point and with the given normal.

    • Method Detail

      • getBounds

        public java.awt.geom.Rectangle2D getBounds()
        Get the bounding box of the shape used to draw this connector end.
        Specified by:
        getBounds in interface ConnectorEnd

      • getConnection

        public void getConnection​(java.awt.geom.Point2D p)
        Get the connection point into the given point
        Specified by:
        getConnection in interface ConnectorEnd

      • getFlipped

        public boolean getFlipped()
        Get the flag saying to flip the arrowhead.

      • getOrigin

        public void getOrigin​(java.awt.geom.Point2D p)
        Get the origin into the given point.
        Specified by:
        getOrigin in interface ConnectorEnd

      • getLength

        public double getLength()
        Get the length.

      • isFilled

        public boolean isFilled()
        Test if the blob is filled or not.

      • paint

        public void paint​(java.awt.Graphics2D g)
        Paint the arrow-head. This method assumes that the graphics context is already set up with the correct paint and stroke.
        Specified by:
        paint in interface ConnectorEnd

      • reshape

        public void reshape()
        Recalculate the shape of the decoration.

      • setNormal

        public void setNormal​(double angle)
        Set the normal of the decoration. The argument is the angle in radians away from the origin. The arrowhead is drawn so that the body of the arrowhead is in the same direction as the normal -- that is, the arrowhead appears to be pointed in the opposite direction to its "normal."
        Specified by:
        setNormal in interface ConnectorEnd

      • setFilled

        public void setFilled​(boolean flag)
        Set the flag that determines whether to fill the arrowhead.

      • setFlipped

        public void setFlipped​(boolean flag)
        Set the flag that says the arrowhead is "flipped." This means that the arrowhead is drawn so that the apparent direction of the arrowhead is the same as its normal.

      • setOrigin

        public void setOrigin​(double x,
                      double y)
        Set the origin of the decoration.
        Specified by:
        setOrigin in interface ConnectorEnd

      • setLength

        public void setLength​(double l)
        Set the length of the arrowhead.

      • translate

        public void translate​(double x,
                      double y)
        Translate the origin by the given amount.
        Specified by:
        translate in interface ConnectorEnd