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/* * @(#)ShapeGraphicAttribute.java 1.18 06/02/14 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ /* * (C) Copyright Taligent, Inc. 1996 - 1997, All Rights Reserved * (C) Copyright IBM Corp. 1996 - 1998, All Rights Reserved * * The original version of this source code and documentation is * copyrighted and owned by Taligent, Inc., a wholly-owned subsidiary * of IBM. These materials are provided under terms of a License * Agreement between Taligent and Sun. This technology is protected * by multiple US and International patents. * * This notice and attribution to Taligent may not be removed. * Taligent is a registered trademark of Taligent, Inc. * */ package java.awt.font; import java.awt.Shape; import java.awt.Graphics; import java.awt.Rectangle; import java.awt.Graphics2D; import java.awt.Shape; import java.awt.geom.AffineTransform; import java.awt.geom.Rectangle2D; /** * The <code>ShapeGraphicAttribute</code> class is an implementation of * {@link GraphicAttribute} that draws shapes in a {@link TextLayout}. * @see GraphicAttribute */ public final class ShapeGraphicAttribute extends GraphicAttribute { private Shape fShape; private boolean fStroke; /** * A key indicating the shape should be stroked with a 1-pixel wide stroke. */ public static final boolean STROKE = true; /** * A key indicating the shape should be filled. */ public static final boolean FILL = false; // cache shape bounds, since GeneralPath doesn't private Rectangle2D fShapeBounds; /** * Constructs a <code>ShapeGraphicAttribute</code> for the specified * {@link Shape}. * @param shape the <code>Shape</code> to render. The * <code>Shape</code> is rendered with its origin at the origin of * this <code>ShapeGraphicAttribute</code> in the * host <code>TextLayout</code>. This object maintains a reference to * <code>shape</code>. * @param alignment one of the alignments from this * <code>ShapeGraphicAttribute</code>. * @param stroke <code>true</code> if the <code>Shape</code> should be * stroked; <code>false</code> if the <code>Shape</code> should be * filled. */ public ShapeGraphicAttribute(Shape shape, int alignment, boolean stroke) { super(alignment); fShape = shape; fStroke = stroke; fShapeBounds = fShape.getBounds2D(); } /** * Returns the ascent of this <code>ShapeGraphicAttribute</code>. The * ascent of a <code>ShapeGraphicAttribute</code> is the positive * distance from the origin of its <code>Shape</code> to the top of * bounds of its <code>Shape</code>. * @return the ascent of this <code>ShapeGraphicAttribute</code>. */ public float getAscent() { return (float) Math.max(0, -fShapeBounds.getMinY()); } /** * Returns the descent of this <code>ShapeGraphicAttribute</code>. * The descent of a <code>ShapeGraphicAttribute</code> is the distance * from the origin of its <code>Shape</code> to the bottom of the * bounds of its <code>Shape</code>. * @return the descent of this <code>ShapeGraphicAttribute</code>. */ public float getDescent() { return (float) Math.max(0, fShapeBounds.getMaxY()); } /** * Returns the advance of this <code>ShapeGraphicAttribute</code>. * The advance of a <code>ShapeGraphicAttribute</code> is the distance * from the origin of its <code>Shape</code> to the right side of the * bounds of its <code>Shape</code>. * @return the advance of this <code>ShapeGraphicAttribute</code>. */ public float getAdvance() { return (float) Math.max(0, fShapeBounds.getMaxX()); } /** * {@inheritDoc} */ public void draw(Graphics2D graphics, float x, float y) { // translating graphics to draw Shape !!! graphics.translate((int)x, (int)y); try { if (fStroke == STROKE) { // REMIND: set stroke to correct size graphics.draw(fShape); } else { graphics.fill(fShape); } } finally { graphics.translate(-(int)x, -(int)y); } } /** * Returns a {@link Rectangle2D} that encloses all of the * bits drawn by this <code>ShapeGraphicAttribute</code> relative to * the rendering position. A graphic can be rendered beyond its * origin, ascent, descent, or advance; but if it does, this method's * implementation should indicate where the graphic is rendered. * @return a <code>Rectangle2D</code> that encloses all of the bits * rendered by this <code>ShapeGraphicAttribute</code>. */ public Rectangle2D getBounds() { Rectangle2D.Float bounds = new Rectangle2D.Float(); bounds.setRect(fShapeBounds); if (fStroke == STROKE) { ++bounds.width; ++bounds.height; } return bounds; } /** * Return a {@link java.awt.Shape} that represents the region that * this <code>ShapeGraphicAttribute</code> renders. This is used when a * {@link TextLayout} is requested to return the outline of the text. * The (untransformed) shape must not extend outside the rectangular * bounds returned by <code>getBounds</code>. * @param tx an optional {@link AffineTransform} to apply to the * this <code>ShapeGraphicAttribute</code>. This can be null. * @return the <code>Shape</code> representing this graphic attribute, * suitable for stroking or filling. * @since 1.6 */ public Shape getOutline(AffineTransform tx) { return tx == null ? fShape : tx.createTransformedShape(fShape); } /** * Returns a hashcode for this <code>ShapeGraphicAttribute</code>. * @return a hash code value for this * <code>ShapeGraphicAttribute</code>. */ public int hashCode() { return fShape.hashCode(); } /** * Compares this <code>ShapeGraphicAttribute</code> to the specified * <code>Object</code>. * @param rhs the <code>Object</code> to compare for equality * @return <code>true</code> if this * <code>ShapeGraphicAttribute</code> equals <code>rhs</code>; * <code>false</code> otherwise. */ public boolean equals(Object rhs) { try { return equals((ShapeGraphicAttribute) rhs); } catch(ClassCastException e) { return false; } } /** * Compares this <code>ShapeGraphicAttribute</code> to the specified * <code>ShapeGraphicAttribute</code>. * @param rhs the <code>ShapeGraphicAttribute</code> to compare for * equality * @return <code>true</code> if this * <code>ShapeGraphicAttribute</code> equals <code>rhs</code>; * <code>false</code> otherwise. */ public boolean equals(ShapeGraphicAttribute rhs) { if (rhs == null) { return false; } if (this == rhs) { return true; } if (fStroke != rhs.fStroke) { return false; } if (getAlignment() != rhs.getAlignment()) { return false; } if (!fShape.equals(rhs.fShape)) { return false; } return true; } }