| /* |
| * Copyright (c) 1997, 2000, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package javax.swing.text; |
| |
| import java.awt.*; |
| import javax.swing.Icon; |
| import javax.swing.event.*; |
| |
| /** |
| * Icon decorator that implements the view interface. The |
| * entire element is used to represent the icon. This acts |
| * as a gateway from the display-only View implementations to |
| * interactive lightweight icons (that is, it allows icons |
| * to be embedded into the View hierarchy. The parent of the icon |
| * is the container that is handed out by the associated view |
| * factory. |
| * |
| * @author Timothy Prinzing |
| */ |
| public class IconView extends View { |
| |
| /** |
| * Creates a new icon view that represents an element. |
| * |
| * @param elem the element to create a view for |
| */ |
| public IconView(Element elem) { |
| super(elem); |
| AttributeSet attr = elem.getAttributes(); |
| c = StyleConstants.getIcon(attr); |
| } |
| |
| // --- View methods --------------------------------------------- |
| |
| /** |
| * Paints the icon. |
| * The real paint behavior occurs naturally from the association |
| * that the icon has with its parent container (the same |
| * container hosting this view), so this simply allows us to |
| * position the icon properly relative to the view. Since |
| * the coordinate system for the view is simply the parent |
| * containers, positioning the child icon is easy. |
| * |
| * @param g the rendering surface to use |
| * @param a the allocated region to render into |
| * @see View#paint |
| */ |
| public void paint(Graphics g, Shape a) { |
| Rectangle alloc = a.getBounds(); |
| c.paintIcon(getContainer(), g, alloc.x, alloc.y); |
| } |
| |
| /** |
| * Determines the preferred span for this view along an |
| * axis. |
| * |
| * @param axis may be either View.X_AXIS or View.Y_AXIS |
| * @return the span the view would like to be rendered into |
| * Typically the view is told to render into the span |
| * that is returned, although there is no guarantee. |
| * The parent may choose to resize or break the view. |
| * @exception IllegalArgumentException for an invalid axis |
| */ |
| public float getPreferredSpan(int axis) { |
| switch (axis) { |
| case View.X_AXIS: |
| return c.getIconWidth(); |
| case View.Y_AXIS: |
| return c.getIconHeight(); |
| default: |
| throw new IllegalArgumentException("Invalid axis: " + axis); |
| } |
| } |
| |
| /** |
| * Determines the desired alignment for this view along an |
| * axis. This is implemented to give the alignment to the |
| * bottom of the icon along the y axis, and the default |
| * along the x axis. |
| * |
| * @param axis may be either View.X_AXIS or View.Y_AXIS |
| * @return the desired alignment >= 0.0f && <= 1.0f. This should be |
| * a value between 0.0 and 1.0 where 0 indicates alignment at the |
| * origin and 1.0 indicates alignment to the full span |
| * away from the origin. An alignment of 0.5 would be the |
| * center of the view. |
| */ |
| public float getAlignment(int axis) { |
| switch (axis) { |
| case View.Y_AXIS: |
| return 1; |
| default: |
| return super.getAlignment(axis); |
| } |
| } |
| |
| /** |
| * Provides a mapping from the document model coordinate space |
| * to the coordinate space of the view mapped to it. |
| * |
| * @param pos the position to convert >= 0 |
| * @param a the allocated region to render into |
| * @return the bounding box of the given position |
| * @exception BadLocationException if the given position does not |
| * represent a valid location in the associated document |
| * @see View#modelToView |
| */ |
| public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException { |
| int p0 = getStartOffset(); |
| int p1 = getEndOffset(); |
| if ((pos >= p0) && (pos <= p1)) { |
| Rectangle r = a.getBounds(); |
| if (pos == p1) { |
| r.x += r.width; |
| } |
| r.width = 0; |
| return r; |
| } |
| throw new BadLocationException(pos + " not in range " + p0 + "," + p1, pos); |
| } |
| |
| /** |
| * Provides a mapping from the view coordinate space to the logical |
| * coordinate space of the model. |
| * |
| * @param x the X coordinate >= 0 |
| * @param y the Y coordinate >= 0 |
| * @param a the allocated region to render into |
| * @return the location within the model that best represents the |
| * given point of view >= 0 |
| * @see View#viewToModel |
| */ |
| public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) { |
| Rectangle alloc = (Rectangle) a; |
| if (x < alloc.x + (alloc.width / 2)) { |
| bias[0] = Position.Bias.Forward; |
| return getStartOffset(); |
| } |
| bias[0] = Position.Bias.Backward; |
| return getEndOffset(); |
| } |
| |
| // --- member variables ------------------------------------------------ |
| |
| private Icon c; |
| } |