4f9533c772
Imported GNU Classpath 0.90
* scripts/makemake.tcl: LocaleData.java moved to gnu/java/locale.
* sources.am: Regenerated.
* gcj/javaprims.h: Regenerated.
* Makefile.in: Regenerated.
* gcj/Makefile.in: Regenerated.
* include/Makefile.in: Regenerated.
* testsuite/Makefile.in: Regenerated.
* gnu/java/lang/VMInstrumentationImpl.java: New override.
* gnu/java/net/local/LocalSocketImpl.java: Likewise.
* gnu/classpath/jdwp/VMMethod.java: Likewise.
* gnu/classpath/jdwp/VMVirtualMachine.java: Update to latest
interface.
* java/lang/Thread.java: Add UncaughtExceptionHandler.
* java/lang/reflect/Method.java: Implements GenericDeclaration and
isSynthetic(),
* java/lang/reflect/Field.java: Likewise.
* java/lang/reflect/Constructor.java
* java/lang/Class.java: Implements Type, GenericDeclaration,
getSimpleName() and getEnclosing*() methods.
* java/lang/Class.h: Add new public methods.
* java/lang/Math.java: Add signum(), ulp() and log10().
* java/lang/natMath.cc (log10): New function.
* java/security/VMSecureRandom.java: New override.
* java/util/logging/Logger.java: Updated to latest classpath
version.
* java/util/logging/LogManager.java: New override.
From-SVN: r113887
976 lines
31 KiB
Java
976 lines
31 KiB
Java
/* BoxView.java -- An composite view
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Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing.text;
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import java.awt.Graphics;
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import java.awt.Rectangle;
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import java.awt.Shape;
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import javax.swing.SizeRequirements;
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import javax.swing.event.DocumentEvent;
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/**
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* An implementation of {@link CompositeView} that arranges its children in
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* a box along one axis. This is comparable to how the <code>BoxLayout</code>
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* works, but for <code>View</code> children.
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*
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* @author Roman Kennke (roman@kennke.org)
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*/
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public class BoxView
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extends CompositeView
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{
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/**
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* The axis along which this <code>BoxView</code> is laid out.
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*/
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private int myAxis;
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/**
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* Indicates if the layout is valid along X_AXIS or Y_AXIS.
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*/
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private boolean[] layoutValid = new boolean[2];
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/**
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* The spans along the X_AXIS and Y_AXIS.
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*/
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private int[][] spans = new int[2][];
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/**
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* The offsets of the children along the X_AXIS and Y_AXIS.
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*/
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private int[][] offsets = new int[2][];
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/**
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* The size requirements along the X_AXIS and Y_AXIS.
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*/
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private SizeRequirements[] requirements = new SizeRequirements[2];
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/**
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* The current span along X_AXIS or Y_AXIS.
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*/
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private int[] span = new int[2];
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/**
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* The SizeRequirements of the child views along the X_AXIS and Y_AXIS.
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*/
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private SizeRequirements[][] childReqs = new SizeRequirements[2][];
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/**
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* Creates a new <code>BoxView</code> for the given
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* <code>Element</code> and axis. Valid values for the axis are
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* {@link View#X_AXIS} and {@link View#Y_AXIS}.
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*
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* @param element the element that is rendered by this BoxView
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* @param axis the axis along which the box is laid out
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*/
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public BoxView(Element element, int axis)
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{
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super(element);
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myAxis = axis;
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layoutValid[0] = false;
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layoutValid[1] = false;
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span[0] = 0;
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span[1] = 0;
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requirements[0] = new SizeRequirements();
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requirements[1] = new SizeRequirements();
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// Initialize the cache arrays.
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spans[0] = new int[0];
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spans[1] = new int[0];
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offsets[0] = new int[0];
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offsets[1] = new int[0];
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}
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/**
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* Returns the axis along which this <code>BoxView</code> is laid out.
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*
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* @return the axis along which this <code>BoxView</code> is laid out
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*
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* @since 1.3
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*/
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public int getAxis()
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{
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return myAxis;
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}
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/**
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* Sets the axis along which this <code>BoxView</code> is laid out.
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*
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* Valid values for the axis are {@link View#X_AXIS} and
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* {@link View#Y_AXIS}.
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*
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* @param axis the axis along which this <code>BoxView</code> is laid out
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*
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* @since 1.3
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*/
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public void setAxis(int axis)
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{
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myAxis = axis;
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}
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/**
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* Marks the layout along the specified axis as invalid. This is triggered
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* automatically when any of the child view changes its preferences
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* via {@link #preferenceChanged(View, boolean, boolean)}.
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*
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* The layout will be updated the next time when
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* {@link #setSize(float, float)} is called, typically from within the
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* {@link #paint(Graphics, Shape)} method.
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*
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* Valid values for the axis are {@link View#X_AXIS} and
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* {@link View#Y_AXIS}.
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*
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* @param axis an <code>int</code> value
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*
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* @since 1.3
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*/
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public void layoutChanged(int axis)
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{
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if (axis != X_AXIS && axis != Y_AXIS)
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throw new IllegalArgumentException("Invalid axis parameter.");
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layoutValid[axis] = false;
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}
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/**
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* Returns <code>true</code> if the layout along the specified
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* <code>axis</code> is valid, <code>false</code> otherwise.
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*
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* Valid values for the axis are {@link View#X_AXIS} and
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* {@link View#Y_AXIS}.
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*
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* @param axis the axis
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*
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* @return <code>true</code> if the layout along the specified
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* <code>axis</code> is valid, <code>false</code> otherwise
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*
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* @since 1.4
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*/
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protected boolean isLayoutValid(int axis)
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{
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if (axis != X_AXIS && axis != Y_AXIS)
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throw new IllegalArgumentException("Invalid axis parameter.");
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return layoutValid[axis];
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}
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/**
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* Paints the child <code>View</code> at the specified <code>index</code>.
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* This method modifies the actual values in <code>alloc</code> so make
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* sure you have a copy of the original values if you need them.
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*
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* @param g the <code>Graphics</code> context to paint to
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* @param alloc the allocated region for the child to paint into
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* @param index the index of the child to be painted
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*
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* @see #childAllocation(int, Rectangle)
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*/
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protected void paintChild(Graphics g, Rectangle alloc, int index)
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{
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View child = getView(index);
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child.paint(g, alloc);
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}
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/**
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* Replaces child views by some other child views. If there are no views to
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* remove (<code>length == 0</code>), the result is a simple insert, if
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* there are no children to add (<code>view == null</code>) the result
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* is a simple removal.
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*
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* In addition this invalidates the layout and resizes the internal cache
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* for the child allocations. The old children's cached allocations can
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* still be accessed (although they are not guaranteed to be valid), and
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* the new children will have an initial offset and span of 0.
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*
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* @param offset the start offset from where to remove children
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* @param length the number of children to remove
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* @param views the views that replace the removed children
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*/
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public void replace(int offset, int length, View[] views)
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{
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int numViews = 0;
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if (views != null)
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numViews = views.length;
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// Resize and copy data for cache arrays.
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// The spansX cache.
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int oldSize = getViewCount();
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int[] newSpansX = new int[oldSize - length + numViews];
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System.arraycopy(spans[X_AXIS], 0, newSpansX, 0, offset);
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System.arraycopy(spans[X_AXIS], offset + length, newSpansX,
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offset + numViews,
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oldSize - (offset + length));
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spans[X_AXIS] = newSpansX;
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// The spansY cache.
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int[] newSpansY = new int[oldSize - length + numViews];
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System.arraycopy(spans[Y_AXIS], 0, newSpansY, 0, offset);
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System.arraycopy(spans[Y_AXIS], offset + length, newSpansY,
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offset + numViews,
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oldSize - (offset + length));
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spans[Y_AXIS] = newSpansY;
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// The offsetsX cache.
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int[] newOffsetsX = new int[oldSize - length + numViews];
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System.arraycopy(offsets[X_AXIS], 0, newOffsetsX, 0, offset);
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System.arraycopy(offsets[X_AXIS], offset + length, newOffsetsX,
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offset + numViews,
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oldSize - (offset + length));
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offsets[X_AXIS] = newOffsetsX;
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// The offsetsY cache.
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int[] newOffsetsY = new int[oldSize - length + numViews];
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System.arraycopy(offsets[Y_AXIS], 0, newOffsetsY, 0, offset);
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System.arraycopy(offsets[Y_AXIS], offset + length, newOffsetsY,
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offset + numViews,
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oldSize - (offset + length));
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offsets[Y_AXIS] = newOffsetsY;
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// Actually perform the replace.
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super.replace(offset, length, views);
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// Invalidate layout information.
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layoutChanged(X_AXIS);
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layoutChanged(Y_AXIS);
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}
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/**
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* Renders the <code>Element</code> that is associated with this
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* <code>View</code>.
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*
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* @param g the <code>Graphics</code> context to render to
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* @param a the allocated region for the <code>Element</code>
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*/
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public void paint(Graphics g, Shape a)
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{
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Rectangle inside = getInsideAllocation(a);
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// TODO: Used for debugging.
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//g.drawRect(inside.x, inside.y, inside.width, inside.height);
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Rectangle copy = new Rectangle(inside);
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int count = getViewCount();
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for (int i = 0; i < count; ++i)
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{
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copy.setBounds(inside);
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childAllocation(i, copy);
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if (!copy.isEmpty()
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&& g.hitClip(copy.x, copy.y, copy.width, copy.height))
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paintChild(g, copy, i);
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}
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}
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/**
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* Returns the preferred span of the content managed by this
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* <code>View</code> along the specified <code>axis</code>.
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*
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* @param axis the axis
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*
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* @return the preferred span of this <code>View</code>.
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*/
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public float getPreferredSpan(int axis)
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{
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updateRequirements(axis);
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return requirements[axis].preferred;
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}
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/**
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* Returns the maximum span of this view along the specified axis.
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* This returns <code>Integer.MAX_VALUE</code> for the minor axis
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* and the preferred span for the major axis.
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*
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* @param axis the axis
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*
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* @return the maximum span of this view along the specified axis
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*/
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public float getMaximumSpan(int axis)
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{
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float max;
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if (axis == myAxis)
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max = getPreferredSpan(axis);
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else
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max = Integer.MAX_VALUE;
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return max;
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}
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/**
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* Returns the minimum span of this view along the specified axis.
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* This calculates the minimum span using
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* {@link #calculateMajorAxisRequirements} or
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* {@link #calculateMinorAxisRequirements} (depending on the axis) and
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* returns the resulting minimum span.
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*
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* @param axis the axis
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*
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* @return the minimum span of this view along the specified axis
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*/
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public float getMinimumSpan(int axis)
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{
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updateRequirements(axis);
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return requirements[axis].minimum;
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}
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/**
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* This method is obsolete and no longer in use. It is replaced by
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* {@link #calculateMajorAxisRequirements(int, SizeRequirements)} and
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* {@link #calculateMinorAxisRequirements(int, SizeRequirements)}.
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*
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* @param axis the axis that is examined
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* @param sr the <code>SizeRequirements</code> object to hold the result,
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* if <code>null</code>, a new one is created
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*
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* @return the size requirements for this <code>BoxView</code> along
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* the specified axis
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*/
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protected SizeRequirements baselineRequirements(int axis,
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SizeRequirements sr)
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{
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updateChildRequirements(axis);
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SizeRequirements res = sr;
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if (res == null)
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res = new SizeRequirements();
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float minLeft = 0;
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float minRight = 0;
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float prefLeft = 0;
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float prefRight = 0;
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float maxLeft = 0;
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float maxRight = 0;
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for (int i = 0; i < childReqs[axis].length; i++)
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{
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float myMinLeft = childReqs[axis][i].minimum * childReqs[axis][i].alignment;
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float myMinRight = childReqs[axis][i].minimum - myMinLeft;
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minLeft = Math.max(myMinLeft, minLeft);
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minRight = Math.max(myMinRight, minRight);
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float myPrefLeft = childReqs[axis][i].preferred * childReqs[axis][i].alignment;
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float myPrefRight = childReqs[axis][i].preferred - myPrefLeft;
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prefLeft = Math.max(myPrefLeft, prefLeft);
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prefRight = Math.max(myPrefRight, prefRight);
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float myMaxLeft = childReqs[axis][i].maximum * childReqs[axis][i].alignment;
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float myMaxRight = childReqs[axis][i].maximum - myMaxLeft;
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maxLeft = Math.max(myMaxLeft, maxLeft);
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maxRight = Math.max(myMaxRight, maxRight);
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}
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int minSize = (int) (minLeft + minRight);
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int prefSize = (int) (prefLeft + prefRight);
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int maxSize = (int) (maxLeft + maxRight);
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float align = prefLeft / (prefRight + prefLeft);
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if (Float.isNaN(align))
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align = 0;
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res.alignment = align;
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res.maximum = maxSize;
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res.preferred = prefSize;
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res.minimum = minSize;
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return res;
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}
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/**
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* Calculates the layout of the children of this <code>BoxView</code> along
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* the specified axis.
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*
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* @param span the target span
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* @param axis the axis that is examined
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* @param offsets an empty array, filled with the offsets of the children
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* @param spans an empty array, filled with the spans of the children
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*/
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protected void baselineLayout(int span, int axis, int[] offsets,
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int[] spans)
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{
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updateChildRequirements(axis);
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updateRequirements(axis);
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// Calculate the spans and offsets using the SizeRequirements uility
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// methods.
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SizeRequirements.calculateAlignedPositions(span, requirements[axis],
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childReqs[axis], offsets, spans);
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}
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/**
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* Calculates the size requirements of this <code>BoxView</code> along
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* its major axis, that is the axis specified in the constructor.
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*
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* @param axis the axis that is examined
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* @param sr the <code>SizeRequirements</code> object to hold the result,
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* if <code>null</code>, a new one is created
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*
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* @return the size requirements for this <code>BoxView</code> along
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* the specified axis
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*/
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protected SizeRequirements calculateMajorAxisRequirements(int axis,
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SizeRequirements sr)
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{
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updateChildRequirements(axis);
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SizeRequirements result = sr;
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if (result == null)
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result = new SizeRequirements();
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long minimum = 0;
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long preferred = 0;
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long maximum = 0;
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for (int i = 0; i < children.length; i++)
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{
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minimum += childReqs[axis][i].minimum;
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preferred += childReqs[axis][i].preferred;
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maximum += childReqs[axis][i].maximum;
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}
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// Overflow check.
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if (minimum > Integer.MAX_VALUE)
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minimum = Integer.MAX_VALUE;
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if (preferred > Integer.MAX_VALUE)
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preferred = Integer.MAX_VALUE;
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if (maximum > Integer.MAX_VALUE)
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maximum = Integer.MAX_VALUE;
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result.minimum = (int) minimum;
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result.preferred = (int) preferred;
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result.maximum = (int) maximum;
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result.alignment = 0.5F;
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return result;
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}
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/**
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* Calculates the size requirements of this <code>BoxView</code> along
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* its minor axis, that is the axis opposite to the axis specified in the
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* constructor.
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*
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* @param axis the axis that is examined
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* @param sr the <code>SizeRequirements</code> object to hold the result,
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* if <code>null</code>, a new one is created
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*
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* @return the size requirements for this <code>BoxView</code> along
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* the specified axis
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*/
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protected SizeRequirements calculateMinorAxisRequirements(int axis,
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SizeRequirements sr)
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{
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updateChildRequirements(axis);
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SizeRequirements res = sr;
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if (res == null)
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res = new SizeRequirements();
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float minLeft = 0;
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float minRight = 0;
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float prefLeft = 0;
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float prefRight = 0;
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float maxLeft = 0;
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float maxRight = 0;
|
|
for (int i = 0; i < childReqs[axis].length; i++)
|
|
{
|
|
float myMinLeft = childReqs[axis][i].minimum * childReqs[axis][i].alignment;
|
|
float myMinRight = childReqs[axis][i].minimum - myMinLeft;
|
|
minLeft = Math.max(myMinLeft, minLeft);
|
|
minRight = Math.max(myMinRight, minRight);
|
|
float myPrefLeft = childReqs[axis][i].preferred * childReqs[axis][i].alignment;
|
|
float myPrefRight = childReqs[axis][i].preferred - myPrefLeft;
|
|
prefLeft = Math.max(myPrefLeft, prefLeft);
|
|
prefRight = Math.max(myPrefRight, prefRight);
|
|
float myMaxLeft = childReqs[axis][i].maximum * childReqs[axis][i].alignment;
|
|
float myMaxRight = childReqs[axis][i].maximum - myMaxLeft;
|
|
maxLeft = Math.max(myMaxLeft, maxLeft);
|
|
maxRight = Math.max(myMaxRight, maxRight);
|
|
}
|
|
int minSize = (int) (minLeft + minRight);
|
|
int prefSize = (int) (prefLeft + prefRight);
|
|
int maxSize = (int) (maxLeft + maxRight);
|
|
float align = prefLeft / (prefRight + prefLeft);
|
|
if (Float.isNaN(align))
|
|
align = 0;
|
|
|
|
res.alignment = align;
|
|
res.maximum = maxSize;
|
|
res.preferred = prefSize;
|
|
res.minimum = minSize;
|
|
return res;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns <code>true</code> if the specified point lies before the
|
|
* given <code>Rectangle</code>, <code>false</code> otherwise.
|
|
*
|
|
* "Before" is typically defined as being to the left or above.
|
|
*
|
|
* @param x the X coordinate of the point
|
|
* @param y the Y coordinate of the point
|
|
* @param r the rectangle to test the point against
|
|
*
|
|
* @return <code>true</code> if the specified point lies before the
|
|
* given <code>Rectangle</code>, <code>false</code> otherwise
|
|
*/
|
|
protected boolean isBefore(int x, int y, Rectangle r)
|
|
{
|
|
boolean result = false;
|
|
|
|
if (myAxis == X_AXIS)
|
|
result = x < r.x;
|
|
else
|
|
result = y < r.y;
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Returns <code>true</code> if the specified point lies after the
|
|
* given <code>Rectangle</code>, <code>false</code> otherwise.
|
|
*
|
|
* "After" is typically defined as being to the right or below.
|
|
*
|
|
* @param x the X coordinate of the point
|
|
* @param y the Y coordinate of the point
|
|
* @param r the rectangle to test the point against
|
|
*
|
|
* @return <code>true</code> if the specified point lies after the
|
|
* given <code>Rectangle</code>, <code>false</code> otherwise
|
|
*/
|
|
protected boolean isAfter(int x, int y, Rectangle r)
|
|
{
|
|
boolean result = false;
|
|
|
|
if (myAxis == X_AXIS)
|
|
result = x > r.x;
|
|
else
|
|
result = y > r.y;
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Returns the child <code>View</code> at the specified location.
|
|
*
|
|
* @param x the X coordinate
|
|
* @param y the Y coordinate
|
|
* @param r the inner allocation of this <code>BoxView</code> on entry,
|
|
* the allocation of the found child on exit
|
|
*
|
|
* @return the child <code>View</code> at the specified location
|
|
*/
|
|
protected View getViewAtPoint(int x, int y, Rectangle r)
|
|
{
|
|
View result = null;
|
|
int count = getViewCount();
|
|
Rectangle copy = new Rectangle(r);
|
|
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
copy.setBounds(r);
|
|
// The next call modifies copy.
|
|
childAllocation(i, copy);
|
|
if (copy.contains(x, y))
|
|
{
|
|
// Modify r on success.
|
|
r.setBounds(copy);
|
|
result = getView(i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (result == null && count > 0)
|
|
return getView(count - 1);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Computes the allocation for a child <code>View</code>. The parameter
|
|
* <code>a</code> stores the allocation of this <code>CompositeView</code>
|
|
* and is then adjusted to hold the allocation of the child view.
|
|
*
|
|
* @param index
|
|
* the index of the child <code>View</code>
|
|
* @param a
|
|
* the allocation of this <code>CompositeView</code> before the
|
|
* call, the allocation of the child on exit
|
|
*/
|
|
protected void childAllocation(int index, Rectangle a)
|
|
{
|
|
if (! isAllocationValid())
|
|
layout(a.width, a.height);
|
|
|
|
a.x += offsets[X_AXIS][index];
|
|
a.y += offsets[Y_AXIS][index];
|
|
a.width = spans[X_AXIS][index];
|
|
a.height = spans[Y_AXIS][index];
|
|
}
|
|
|
|
/**
|
|
* Lays out the children of this <code>BoxView</code> with the specified
|
|
* bounds.
|
|
*
|
|
* @param width the width of the allocated region for the children (that
|
|
* is the inner allocation of this <code>BoxView</code>
|
|
* @param height the height of the allocated region for the children (that
|
|
* is the inner allocation of this <code>BoxView</code>
|
|
*/
|
|
protected void layout(int width, int height)
|
|
{
|
|
int[] newSpan = new int[]{ width, height };
|
|
int count = getViewCount();
|
|
|
|
// Update minor axis as appropriate. We need to first update the minor
|
|
// axis layout because that might affect the children's preferences along
|
|
// the major axis.
|
|
int minorAxis = myAxis == X_AXIS ? Y_AXIS : X_AXIS;
|
|
if ((! isLayoutValid(minorAxis)) || newSpan[minorAxis] != span[minorAxis])
|
|
{
|
|
layoutValid[minorAxis] = false;
|
|
span[minorAxis] = newSpan[minorAxis];
|
|
layoutMinorAxis(span[minorAxis], minorAxis, offsets[minorAxis],
|
|
spans[minorAxis]);
|
|
|
|
// Update the child view's sizes.
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
getView(i).setSize(spans[X_AXIS][i], spans[Y_AXIS][i]);
|
|
}
|
|
layoutValid[minorAxis] = true;
|
|
}
|
|
|
|
|
|
// Update major axis as appropriate.
|
|
if ((! isLayoutValid(myAxis)) || newSpan[myAxis] != span[myAxis])
|
|
{
|
|
layoutValid[myAxis] = false;
|
|
span[myAxis] = newSpan[myAxis];
|
|
layoutMajorAxis(span[myAxis], myAxis, offsets[myAxis],
|
|
spans[myAxis]);
|
|
|
|
// Update the child view's sizes.
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
getView(i).setSize(spans[X_AXIS][i], spans[Y_AXIS][i]);
|
|
}
|
|
layoutValid[myAxis] = true;
|
|
}
|
|
|
|
if (layoutValid[myAxis] == false)
|
|
System.err.println("WARNING: Major axis layout must be valid after layout");
|
|
if (layoutValid[minorAxis] == false)
|
|
System.err.println("Minor axis layout must be valid after layout");
|
|
}
|
|
|
|
/**
|
|
* Performs the layout along the major axis of a <code>BoxView</code>.
|
|
*
|
|
* @param targetSpan the (inner) span of the <code>BoxView</code> in which
|
|
* to layout the children
|
|
* @param axis the axis along which the layout is performed
|
|
* @param offsets the array that holds the offsets of the children on exit
|
|
* @param spans the array that holds the spans of the children on exit
|
|
*/
|
|
protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets,
|
|
int[] spans)
|
|
{
|
|
updateChildRequirements(axis);
|
|
updateRequirements(axis);
|
|
|
|
// Calculate the spans and offsets using the SizeRequirements uility
|
|
// methods.
|
|
SizeRequirements.calculateTiledPositions(targetSpan, requirements[axis],
|
|
childReqs[axis],
|
|
offsets, spans);
|
|
|
|
}
|
|
|
|
/**
|
|
* Performs the layout along the minor axis of a <code>BoxView</code>.
|
|
*
|
|
* @param targetSpan the (inner) span of the <code>BoxView</code> in which
|
|
* to layout the children
|
|
* @param axis the axis along which the layout is performed
|
|
* @param offsets the array that holds the offsets of the children on exit
|
|
* @param spans the array that holds the spans of the children on exit
|
|
*/
|
|
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets,
|
|
int[] spans)
|
|
{
|
|
updateChildRequirements(axis);
|
|
updateRequirements(axis);
|
|
|
|
// Calculate the spans and offsets using the SizeRequirements uility
|
|
// methods.
|
|
SizeRequirements.calculateAlignedPositions(targetSpan, requirements[axis],
|
|
childReqs[axis], offsets,
|
|
spans);
|
|
}
|
|
|
|
/**
|
|
* Returns <code>true</code> if the cached allocations for the children
|
|
* are still valid, <code>false</code> otherwise.
|
|
*
|
|
* @return <code>true</code> if the cached allocations for the children
|
|
* are still valid, <code>false</code> otherwise
|
|
*/
|
|
protected boolean isAllocationValid()
|
|
{
|
|
return isLayoutValid(X_AXIS) && isLayoutValid(Y_AXIS);
|
|
}
|
|
|
|
/**
|
|
* Return the current width of the box. This is the last allocated width.
|
|
*
|
|
* @return the current width of the box
|
|
*/
|
|
public int getWidth()
|
|
{
|
|
return span[X_AXIS];
|
|
}
|
|
|
|
/**
|
|
* Return the current height of the box. This is the last allocated height.
|
|
*
|
|
* @return the current height of the box
|
|
*/
|
|
public int getHeight()
|
|
{
|
|
return span[Y_AXIS];
|
|
}
|
|
|
|
/**
|
|
* Sets the size of the view. If the actual size has changed, the layout
|
|
* is updated accordingly.
|
|
*
|
|
* @param width the new width
|
|
* @param height the new height
|
|
*/
|
|
public void setSize(float width, float height)
|
|
{
|
|
layout((int) width, (int) height);
|
|
}
|
|
|
|
/**
|
|
* Returns the span for the child view with the given index for the specified
|
|
* axis.
|
|
*
|
|
* @param axis the axis to examine, either <code>X_AXIS</code> or
|
|
* <code>Y_AXIS</code>
|
|
* @param childIndex the index of the child for for which to return the span
|
|
*
|
|
* @return the span for the child view with the given index for the specified
|
|
* axis
|
|
*/
|
|
protected int getSpan(int axis, int childIndex)
|
|
{
|
|
if (axis != X_AXIS && axis != Y_AXIS)
|
|
throw new IllegalArgumentException("Illegal axis argument");
|
|
return spans[axis][childIndex];
|
|
}
|
|
|
|
/**
|
|
* Returns the offset for the child view with the given index for the
|
|
* specified axis.
|
|
*
|
|
* @param axis the axis to examine, either <code>X_AXIS</code> or
|
|
* <code>Y_AXIS</code>
|
|
* @param childIndex the index of the child for for which to return the span
|
|
*
|
|
* @return the offset for the child view with the given index for the
|
|
* specified axis
|
|
*/
|
|
protected int getOffset(int axis, int childIndex)
|
|
{
|
|
if (axis != X_AXIS && axis != Y_AXIS)
|
|
throw new IllegalArgumentException("Illegal axis argument");
|
|
return offsets[axis][childIndex];
|
|
}
|
|
|
|
/**
|
|
* Returns the alignment for this box view for the specified axis. The
|
|
* axis that is tiled (the major axis) will be requested to be aligned
|
|
* centered (0.5F). The minor axis alignment depends on the child view's
|
|
* total alignment.
|
|
*
|
|
* @param axis the axis which is examined
|
|
*
|
|
* @return the alignment for this box view for the specified axis
|
|
*/
|
|
public float getAlignment(int axis)
|
|
{
|
|
float align;
|
|
if (axis == myAxis)
|
|
align = 0.5F;
|
|
else
|
|
{
|
|
updateRequirements(axis);
|
|
align = requirements[axis].alignment;
|
|
}
|
|
return align;
|
|
}
|
|
|
|
/**
|
|
* Called by a child View when its preferred span has changed.
|
|
*
|
|
* @param width indicates that the preferred width of the child changed.
|
|
* @param height indicates that the preferred height of the child changed.
|
|
* @param child the child View.
|
|
*/
|
|
public void preferenceChanged(View child, boolean width, boolean height)
|
|
{
|
|
if (width)
|
|
layoutValid[X_AXIS] = false;
|
|
if (height)
|
|
layoutValid[Y_AXIS] = false;
|
|
super.preferenceChanged(child, width, height);
|
|
}
|
|
|
|
/**
|
|
* Maps the document model position <code>pos</code> to a Shape
|
|
* in the view coordinate space. This method overrides CompositeView's
|
|
* method to make sure the children are allocated properly before
|
|
* calling the super's behaviour.
|
|
*/
|
|
public Shape modelToView(int pos, Shape a, Position.Bias bias)
|
|
throws BadLocationException
|
|
{
|
|
// Make sure everything is allocated properly and then call super
|
|
if (! isAllocationValid())
|
|
{
|
|
Rectangle bounds = a.getBounds();
|
|
layout(bounds.width, bounds.height);
|
|
}
|
|
return super.modelToView(pos, a, bias);
|
|
}
|
|
|
|
/**
|
|
* Returns the resize weight of this view. A value of <code>0</code> or less
|
|
* means this view is not resizeable. Positive values make the view
|
|
* resizeable. This implementation returns <code>0</code> for the major
|
|
* axis and <code>1</code> for the minor axis of this box view.
|
|
*
|
|
* @param axis the axis
|
|
*
|
|
* @return the resizability of this view along the specified axis
|
|
*
|
|
* @throws IllegalArgumentException if <code>axis</code> is invalid
|
|
*/
|
|
public int getResizeWeight(int axis)
|
|
{
|
|
if (axis != X_AXIS && axis != Y_AXIS)
|
|
throw new IllegalArgumentException("Illegal axis argument");
|
|
int weight = 1;
|
|
if (axis == myAxis)
|
|
weight = 0;
|
|
return weight;
|
|
}
|
|
|
|
/**
|
|
* Returns the child allocation for the child view with the specified
|
|
* <code>index</code>. If the layout is invalid, this returns
|
|
* <code>null</code>.
|
|
*
|
|
* @param index the child view index
|
|
* @param a the allocation to this view
|
|
*
|
|
* @return the child allocation for the child view with the specified
|
|
* <code>index</code> or <code>null</code> if the layout is invalid
|
|
* or <code>a</code> is null
|
|
*/
|
|
public Shape getChildAllocation(int index, Shape a)
|
|
{
|
|
Shape ret = null;
|
|
if (isAllocationValid() && a != null)
|
|
ret = super.getChildAllocation(index, a);
|
|
return ret;
|
|
}
|
|
|
|
protected void forwardUpdate(DocumentEvent.ElementChange ec, DocumentEvent e,
|
|
Shape a, ViewFactory vf)
|
|
{
|
|
// FIXME: What to do here?
|
|
super.forwardUpdate(ec, e, a, vf);
|
|
}
|
|
|
|
public int viewToModel(float x, float y, Shape a, Position.Bias[] bias)
|
|
{
|
|
// FIXME: What to do here?
|
|
return super.viewToModel(x, y, a, bias);
|
|
}
|
|
|
|
protected boolean flipEastAndWestAtEnds(int position, Position.Bias bias)
|
|
{
|
|
// FIXME: What to do here?
|
|
return super.flipEastAndWestAtEnds(position, bias);
|
|
}
|
|
|
|
/**
|
|
* Updates the child requirements along the specified axis. The requirements
|
|
* are only updated if the layout for the specified axis is marked as
|
|
* invalid.
|
|
*
|
|
* @param axis the axis to be updated
|
|
*/
|
|
private void updateChildRequirements(int axis)
|
|
{
|
|
if (! isLayoutValid(axis))
|
|
{
|
|
int numChildren = getViewCount();
|
|
if (childReqs[axis] == null || childReqs[axis].length != numChildren)
|
|
childReqs[axis] = new SizeRequirements[numChildren];
|
|
for (int i = 0; i < numChildren; ++i)
|
|
{
|
|
View child = getView(i);
|
|
childReqs[axis][i] =
|
|
new SizeRequirements((int) child.getMinimumSpan(axis),
|
|
(int) child.getPreferredSpan(axis),
|
|
(int) child.getMaximumSpan(axis),
|
|
child.getAlignment(axis));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Updates the view's cached requirements along the specified axis if
|
|
* necessary. The requirements are only updated if the layout for the
|
|
* specified axis is marked as invalid.
|
|
*
|
|
* @param axis the axis
|
|
*/
|
|
private void updateRequirements(int axis)
|
|
{
|
|
if (! layoutValid[axis])
|
|
{
|
|
if (axis == myAxis)
|
|
requirements[axis] = calculateMajorAxisRequirements(axis,
|
|
requirements[axis]);
|
|
else
|
|
requirements[axis] = calculateMinorAxisRequirements(axis,
|
|
requirements[axis]);
|
|
}
|
|
}
|
|
}
|