basicstroke.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 445 行 · 第 1/2 页

        if (dash != null) {
            this.dash = (float []) dash.clone();
        }
	this.dash_phase	= dash_phase;
    }

    /**
     * Constructs a solid <code>BasicStroke</code> with the specified 
     * attributes.
     * @param width the width of the <code>BasicStroke</code>
     * @param cap the decoration of the ends of a <code>BasicStroke</code>
     * @param join the decoration applied where path segments meet
     * @param miterlimit the limit to trim the miter join
     * @throws IllegalArgumentException if <code>width</code> is negative
     * @throws IllegalArgumentException if <code>cap</code> is not either
     *         CAP_BUTT, CAP_ROUND or CAP_SQUARE
     * @throws IllegalArgumentException if <code>miterlimit</code> is less
     *         than 1 and <code>join</code> is JOIN_MITER
     * @throws IllegalArgumentException if <code>join</code> is not
     *         either JOIN_ROUND, JOIN_BEVEL, or JOIN_MITER
     */
    public BasicStroke(float width, int cap, int join, float miterlimit) {
	this(width, cap, join, miterlimit, null, 0.0f);
    }

    /**
     * Constructs a solid <code>BasicStroke</code> with the specified 
     * attributes.  The <code>miterlimit</code> parameter is 
     * unnecessary in cases where the default is allowable or the 
     * line joins are not specified as JOIN_MITER.
     * @param width the width of the <code>BasicStroke</code>
     * @param cap the decoration of the ends of a <code>BasicStroke</code>
     * @param join the decoration applied where path segments meet
     * @throws IllegalArgumentException if <code>width</code> is negative
     * @throws IllegalArgumentException if <code>cap</code> is not either
     *         CAP_BUTT, CAP_ROUND or CAP_SQUARE
     * @throws IllegalArgumentException if <code>join</code> is not
     *         either JOIN_ROUND, JOIN_BEVEL, or JOIN_MITER
     */
    public BasicStroke(float width, int cap, int join) {
	this(width, cap, join, 10.0f, null, 0.0f);
    }

    /**
     * Constructs a solid <code>BasicStroke</code> with the specified 
     * line width and with default values for the cap and join 
     * styles.
     * @param width the width of the <code>BasicStroke</code>
     * @throws IllegalArgumentException if <code>width</code> is negative
     */
    public BasicStroke(float width) {
	this(width, CAP_SQUARE, JOIN_MITER, 10.0f, null, 0.0f);
    }

    /**
     * Constructs a new <code>BasicStroke</code> with defaults for all 
     * attributes.
     * The default attributes are a solid line of width 1.0, CAP_SQUARE,
     * JOIN_MITER, a miter limit of 10.0.
     */
    public BasicStroke() {
	this(1.0f, CAP_SQUARE, JOIN_MITER, 10.0f, null, 0.0f);
    }


//    /**
//     * Returns a <code>Shape</code> whose interior defines the 
//     * stroked outline of a specified <code>Shape</code>.
//     * @param s the <code>Shape</code> boundary be stroked
//     * @return the <code>Shape</code> of the stroked outline.
//     */
//    public Shape createStrokedShape(Shape s) {
//	return s;
//    }

    /**
     * Returns the line width.  Line width is represented in user space, 
     * which is the default-coordinate space used by Java 2D.  See the
     * <code>Graphics2D</code> class comments for more information on
     * the user space coordinate system.
     * @return the line width of this <code>BasicStroke</code>.
     * @see Graphics2D
     */
    public float getLineWidth() {
	return width;
    }

    /**
     * Returns the end cap style.
     * @return the end cap style of this <code>BasicStroke</code> as one
     * of the static <code>int</code> values that define possible end cap
     * styles.
     */
    public int getEndCap() {
	return cap;
    }

    /**
     * Returns the line join style.
     * @return the line join style of the <code>BasicStroke</code> as one
     * of the static <code>int</code> values that define possible line
     * join styles.
     */
    public int getLineJoin() {
	return join;
    }

    /**
     * Returns the limit of miter joins.
     * @return the limit of miter joins of the <code>BasicStroke</code>.
     */
    public float getMiterLimit() {
	return miterlimit;
    }

//    /**
//     * Returns the array representing the lengths of the dash segments.
//     * Alternate entries in the array represent the user space lengths
//     * of the opaque and transparent segments of the dashes.
//     * As the pen moves along the outline of the <code>Shape</code>
//     * to be stroked, the user space
//     * distance that the pen travels is accumulated.  The distance
//     * value is used to index into the dash array.
//     * The pen is opaque when its current cumulative distance maps
//     * to an even element of the dash array and transparent otherwise.
//     * @return the dash array.
//     */
//    public float[] getDashArray() {
//        if (dash == null) {
//            return null;
//        }
//
//        return (float[]) dash.clone();
//    }
//
//    /**
//     * Returns the current dash phase.
//     * The dash phase is a distance specified in user coordinates that 
//     * represents an offset into the dashing pattern. In other words, the dash 
//     * phase defines the point in the dashing pattern that will correspond to 
//     * the beginning of the stroke.
//     * @return the dash phase as a <code>float</code> value.
//     */
//    public float getDashPhase() {
//	return dash_phase;
//    }

    /**
     * Returns the hashcode for this stroke.
     * @return      a hash code for this stroke.
     */
    public int hashCode() {
	int hash = Float.floatToIntBits(width);
	hash = hash * 31 + join;
	hash = hash * 31 + cap;
	hash = hash * 31 + Float.floatToIntBits(miterlimit);
	if (dash != null) {
	    hash = hash * 31 + Float.floatToIntBits(dash_phase);
	    for (int i = 0; i < dash.length; i++) {
		hash = hash * 31 + Float.floatToIntBits(dash[i]);
	    }
	}
	return hash;
    }

    /**
     * Returns true if this BasicStroke represents the same
     * stroking operation as the given argument.
     */
   /**
    * Tests if a specified object is equal to this <code>BasicStroke</code>
    * by first testing if it is a <code>BasicStroke</code> and then comparing 
    * its width, join, cap, miter limit, dash, and dash phase attributes with 
    * those of this <code>BasicStroke</code>.
    * @param  obj the specified object to compare to this 
    *              <code>BasicStroke</code>
    * @return <code>true</code> if the width, join, cap, miter limit, dash, and
    *            dash phase are the same for both objects;
    *            <code>false</code> otherwise.
    */
    public boolean equals(Object obj) {
        if (!(obj instanceof BasicStroke)) {
            return false;
        }

        BasicStroke bs = (BasicStroke) obj;
        if (width != bs.width) {
            return false;
        }

        if (join != bs.join) {
            return false;
        }

        if (cap != bs.cap) {
            return false;
        }

        if (miterlimit != bs.miterlimit) {
            return false;
        }

        if (dash != null) {
	    if (dash_phase != bs.dash_phase) {
		return false;
	    }

	    if (!java.util.Arrays.equals(dash, bs.dash)) {
		return false;
	    }
        }
        else if (bs.dash != null) {
            return false;
        }

        return true;
    }
}