author | malenkov |
Wed, 30 Apr 2014 19:28:05 +0400 | |
changeset 24544 | c0133e7c7162 |
parent 23010 | 6dadb192ad81 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.text; |
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import java.awt.*; |
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import javax.swing.Icon; |
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import javax.swing.event.*; |
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/** |
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* Icon decorator that implements the view interface. The |
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* entire element is used to represent the icon. This acts |
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* as a gateway from the display-only View implementations to |
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* interactive lightweight icons (that is, it allows icons |
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* to be embedded into the View hierarchy. The parent of the icon |
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* is the container that is handed out by the associated view |
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* factory. |
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* |
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* @author Timothy Prinzing |
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*/ |
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public class IconView extends View { |
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/** |
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* Creates a new icon view that represents an element. |
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* |
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* @param elem the element to create a view for |
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*/ |
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public IconView(Element elem) { |
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super(elem); |
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AttributeSet attr = elem.getAttributes(); |
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c = StyleConstants.getIcon(attr); |
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} |
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// --- View methods --------------------------------------------- |
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/** |
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* Paints the icon. |
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* The real paint behavior occurs naturally from the association |
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* that the icon has with its parent container (the same |
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* container hosting this view), so this simply allows us to |
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* position the icon properly relative to the view. Since |
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* the coordinate system for the view is simply the parent |
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* containers, positioning the child icon is easy. |
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* |
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* @param g the rendering surface to use |
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* @param a the allocated region to render into |
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* @see View#paint |
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*/ |
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public void paint(Graphics g, Shape a) { |
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Rectangle alloc = a.getBounds(); |
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c.paintIcon(getContainer(), g, alloc.x, alloc.y); |
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} |
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/** |
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* Determines the preferred span for this view along an |
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* axis. |
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* |
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* @param axis may be either View.X_AXIS or View.Y_AXIS |
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* @return the span the view would like to be rendered into |
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* Typically the view is told to render into the span |
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* that is returned, although there is no guarantee. |
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* The parent may choose to resize or break the view. |
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* @exception IllegalArgumentException for an invalid axis |
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*/ |
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public float getPreferredSpan(int axis) { |
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switch (axis) { |
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case View.X_AXIS: |
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return c.getIconWidth(); |
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case View.Y_AXIS: |
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return c.getIconHeight(); |
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default: |
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throw new IllegalArgumentException("Invalid axis: " + axis); |
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} |
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} |
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/** |
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* Determines the desired alignment for this view along an |
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* axis. This is implemented to give the alignment to the |
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* bottom of the icon along the y axis, and the default |
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* along the x axis. |
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* |
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* @param axis may be either View.X_AXIS or View.Y_AXIS |
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* @return the desired alignment >= 0.0f && <= 1.0f. This should be |
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* a value between 0.0 and 1.0 where 0 indicates alignment at the |
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* origin and 1.0 indicates alignment to the full span |
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* away from the origin. An alignment of 0.5 would be the |
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* center of the view. |
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*/ |
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public float getAlignment(int axis) { |
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switch (axis) { |
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case View.Y_AXIS: |
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return 1; |
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default: |
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return super.getAlignment(axis); |
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} |
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} |
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/** |
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* Provides a mapping from the document model coordinate space |
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* to the coordinate space of the view mapped to it. |
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* |
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* @param pos the position to convert >= 0 |
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* @param a the allocated region to render into |
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* @return the bounding box of the given position |
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* @exception BadLocationException if the given position does not |
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* represent a valid location in the associated document |
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* @see View#modelToView |
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*/ |
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public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException { |
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int p0 = getStartOffset(); |
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int p1 = getEndOffset(); |
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if ((pos >= p0) && (pos <= p1)) { |
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Rectangle r = a.getBounds(); |
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if (pos == p1) { |
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r.x += r.width; |
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} |
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r.width = 0; |
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return r; |
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} |
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throw new BadLocationException(pos + " not in range " + p0 + "," + p1, pos); |
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} |
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/** |
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* Provides a mapping from the view coordinate space to the logical |
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* coordinate space of the model. |
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* |
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* @param x the X coordinate >= 0 |
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* @param y the Y coordinate >= 0 |
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* @param a the allocated region to render into |
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* @return the location within the model that best represents the |
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* given point of view >= 0 |
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* @see View#viewToModel |
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*/ |
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public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) { |
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Rectangle alloc = (Rectangle) a; |
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if (x < alloc.x + (alloc.width / 2)) { |
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bias[0] = Position.Bias.Forward; |
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return getStartOffset(); |
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} |
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bias[0] = Position.Bias.Backward; |
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return getEndOffset(); |
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} |
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// --- member variables ------------------------------------------------ |
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private Icon c; |
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} |