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HighlightPredicate.java
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HighlightPredicate.java
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/*
* $Id: HighlightPredicate.java 3681 2010-04-27 18:47:07Z kschaefe $
*
* Copyright 2006 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.hdesktop.swingx.decorator;
import java.awt.Component;
import java.awt.Point;
import java.awt.Rectangle;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import org.hdesktop.swingx.rollover.RolloverProducer;
import org.hdesktop.swingx.util.Contract;
/**
* A controller which decides whether or not a visual decoration should
* be applied to the given Component in the given ComponentAdapter state.
* This is a on/off <b>decision</b> only, the actual decoration is
* left to the AbstractHighlighter which typically respects this predicate. <p>
*
* Note: implementations should be immutable because <code>Highlighter</code>s
* guarantee to notify listeners on any state change which might effect the highlight.
* They can't comply to that contract if predicate internal state changes under their
* feet. If dynamic predicate state is required, the safe alternative is to create
* and set a new predicate.<p>
*
*
* @author Jeanette Winzenburg
*
* @see AbstractHighlighter
*/
public interface HighlightPredicate {
/**
* Returns a boolean to indicate whether the component should be
* highlighted.<p>
*
* Note: both parameters should be considered strictly read-only!
*
* @param renderer the cell renderer component that is to be decorated,
* must not be null
* @param adapter the ComponentAdapter for this decorate operation,
* most not be null
* @return a boolean to indicate whether the component should be highlighted.
*/
boolean isHighlighted(Component renderer, ComponentAdapter adapter);
//--------------------- implemented Constants
/**
* Unconditional true.
*/
public static final HighlightPredicate ALWAYS = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return true always.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return true;
}
};
/**
* Unconditional false.
*/
public static final HighlightPredicate NEVER = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return false always.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return false;
}
};
/**
* Rollover Row.
*/
public static final HighlightPredicate ROLLOVER_ROW = new HighlightPredicate() {
/**
* @inheritDoc
* Implemented to return true if the adapter's component is enabled and
* the row of its rollover property equals the adapter's row, returns
* false otherwise.
*
* @see org.hdesktop.swingx.rollover.RolloverProducer
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
if (!adapter.getComponent().isEnabled()) return false;
Point p = (Point) adapter.getComponent().getClientProperty(
RolloverProducer.ROLLOVER_KEY);
return p != null && p.y == adapter.row;
}
};
/**
* Rollover Column.
*/
public static final HighlightPredicate ROLLOVER_COLUMN = new HighlightPredicate() {
/**
* @inheritDoc
* Implemented to return true if the adapter's component is enabled and
* the column of its rollover property equals the adapter's columns, returns
* false otherwise.
*
* @see org.hdesktop.swingx.rollover.RolloverProducer
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
if (!adapter.getComponent().isEnabled()) return false;
Point p = (Point) adapter.getComponent().getClientProperty(
RolloverProducer.ROLLOVER_KEY);
return p != null && p.x == adapter.column;
}
};
/**
* Rollover Cell.
*/
public static final HighlightPredicate ROLLOVER_CELL = new HighlightPredicate() {
/**
* @inheritDoc
* Implemented to return true if the adapter's component is enabled and
* the column of its rollover property equals the adapter's columns, returns
* false otherwise.
*
* @see org.hdesktop.swingx.rollover.RolloverProducer
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
if (!adapter.getComponent().isEnabled()) return false;
Point p = (Point) adapter.getComponent().getClientProperty(
RolloverProducer.ROLLOVER_KEY);
return p != null && p.y == adapter.row && p.x == adapter.column;
}
};
/**
* Is editable.
*/
public static final HighlightPredicate EDITABLE = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return true is the given adapter isEditable, false otherwise.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return adapter.isEditable();
}
};
/**
* Convenience for read-only (same as !editable).
*/
public static final HighlightPredicate READ_ONLY = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return false is the given adapter isEditable, true otherwise.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return !adapter.isEditable();
}
};
/**
* Leaf predicate.
*/
public static final HighlightPredicate IS_LEAF = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return true if the given adapter isLeaf, false otherwise.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return adapter.isLeaf();
}
};
/**
* Folder predicate - convenience: same as !IS_LEAF.
*/
public static final HighlightPredicate IS_FOLDER = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return false if the given adapter isLeaf, true otherwise.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return !adapter.isLeaf();
}
};
/**
* Selected predicate.
*/
public static final HighlightPredicate IS_SELECTED = new HighlightPredicate() {
@Override
public boolean isHighlighted(Component renderer,
ComponentAdapter adapter) {
return adapter.isSelected();
}
};
/**
* Determines if the displayed text is truncated.
*
* @author Karl Schaefer
*/
public static final HighlightPredicate IS_TEXT_TRUNCATED = new HighlightPredicate() {
@Override
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
JComponent c = renderer instanceof JComponent ? (JComponent) renderer : null;
String text = adapter.getString();
Icon icon = null;
//defaults from JLabel
int verticalAlignment = SwingConstants.CENTER;
int horizontalAlignment = SwingConstants.LEADING;
int verticalTextPosition = SwingConstants.CENTER;
int horizontalTextPosition = SwingConstants.TRAILING;
int gap = 0;
if (renderer instanceof JLabel) {
icon = ((JLabel) renderer).getIcon();
gap = ((JLabel) renderer).getIconTextGap();
} else if (renderer instanceof AbstractButton) {
icon = ((AbstractButton) renderer).getIcon();
gap = ((AbstractButton) renderer).getIconTextGap();
}
String result = SwingUtilities.layoutCompoundLabel(c, renderer
.getFontMetrics(renderer.getFont()), text, icon, verticalAlignment,
horizontalAlignment, verticalTextPosition, horizontalTextPosition, adapter.getCellBounds(),
new Rectangle(), new Rectangle(), gap);
return !text.equals(result);
}
};
/**
* Focus predicate.
*/
public static final HighlightPredicate HAS_FOCUS = new HighlightPredicate() {
/**
* {@inheritDoc} <p>
*
* Implemented to return truw if the given adapter hasFocus, false otherwise.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return adapter.hasFocus();
}
};
/**
* Even rows.
*
* PENDING: this is zero based (that is "really" even 0, 2, 4 ..), differing
* from the old AlternateRowHighlighter.
*
*/
public static final HighlightPredicate EVEN = new HighlightPredicate() {
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return adapter.row % 2 == 0;
}
};
/**
* Odd rows.
*
* PENDING: this is zero based (that is 1, 3, 4 ..), differs from
* the old implementation which was one based?
*
*/
public static final HighlightPredicate ODD = new HighlightPredicate() {
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return !EVEN.isHighlighted(renderer, adapter);
}
};
/**
* Negative BigDecimals.
*/
public static final HighlightPredicate BIG_DECIMAL_NEGATIVE = new HighlightPredicate() {
public boolean isHighlighted(Component renderer,
ComponentAdapter adapter) {
return (adapter.getValue() instanceof BigDecimal)
&& ((BigDecimal) adapter.getValue()).compareTo(BigDecimal.ZERO) < 0;
}
};
/**
* Negative Number.
*/
public static final HighlightPredicate INTEGER_NEGATIVE = new HighlightPredicate() {
public boolean isHighlighted(Component renderer,
ComponentAdapter adapter) {
return (adapter.getValue() instanceof Number)
&& ((Number) adapter.getValue()).intValue() < 0;
}
};
// PENDING: these general type empty arrays don't really belong here?
public static final HighlightPredicate[] EMPTY_PREDICATE_ARRAY = new HighlightPredicate[0];
public static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
public static final Integer[] EMPTY_INTEGER_ARRAY = new Integer[0];
//----------------- logical implementations amongst HighlightPredicates
/**
* Negation of a HighlightPredicate.
*/
public static class NotHighlightPredicate implements HighlightPredicate {
private HighlightPredicate predicate;
/**
* Instantiates a not against the given predicate.
* @param predicate the predicate to negate, must not be null.
* @throws NullPointerException if the predicate is null
*/
public NotHighlightPredicate(HighlightPredicate predicate) {
if (predicate == null)
throw new NullPointerException("predicate must not be null");
this.predicate = predicate;
}
/**
* {@inheritDoc}
* Implemented to return the negation of the given predicate.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return !predicate.isHighlighted(renderer, adapter);
}
/**
* @return the contained HighlightPredicate.
*/
public HighlightPredicate getHighlightPredicate() {
return predicate;
}
}
/**
* Ands a list of predicates.
*/
public static class AndHighlightPredicate implements HighlightPredicate {
private List<HighlightPredicate> predicate;
/**
* Instantiates a predicate which ands all given predicates.
* @param predicate zero or more not null predicates to and
* @throws NullPointerException if the predicate is null
*/
public AndHighlightPredicate(HighlightPredicate... predicate) {
this.predicate = Arrays.asList(Contract.asNotNull(predicate, "predicate must not be null"));
}
/**
* Instantiates a predicate which ANDs all contained predicates.
* @param list a collection with zero or more not null predicates to AND
* @throws NullPointerException if the collection is null
*/
public AndHighlightPredicate(Collection<HighlightPredicate> list) {
this.predicate = new ArrayList<HighlightPredicate>(Contract.asNotNull(list, "predicate list must not be null"));
}
/**
* {@inheritDoc}
* Implemented to return false if any of the contained predicates is
* false or if there are no predicates.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
for (HighlightPredicate hp : predicate) {
if (!hp.isHighlighted(renderer, adapter)) return false;
}
return !predicate.isEmpty();
}
/**
* @return the contained HighlightPredicates.
*/
public HighlightPredicate[] getHighlightPredicates() {
if (predicate.isEmpty()) return EMPTY_PREDICATE_ARRAY;
return predicate.toArray(new HighlightPredicate[predicate.size()]);
}
}
/**
* Or's a list of predicates.
*/
public static class OrHighlightPredicate implements HighlightPredicate {
private List<HighlightPredicate> predicate;
/**
* Instantiates a predicate which ORs all given predicates.
* @param predicate zero or more not null predicates to OR
* @throws NullPointerException if the predicate is null
*/
public OrHighlightPredicate(HighlightPredicate... predicate) {
this.predicate = Arrays.asList(Contract.asNotNull(predicate, "predicate must not be null"));
}
/**
* Instantiates a predicate which ORs all contained predicates.
* @param list a collection with zero or more not null predicates to OR
* @throws NullPointerException if the collection is null
*/
public OrHighlightPredicate(Collection<HighlightPredicate> list) {
this.predicate = new ArrayList<HighlightPredicate>(Contract.asNotNull(list, "predicate list must not be null"));
}
/**
* {@inheritDoc}
* Implemented to return true if any of the contained predicates is
* true.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
for (HighlightPredicate hp : predicate) {
if (hp.isHighlighted(renderer, adapter)) return true;
}
return false;
}
/**
* @return all registered predicates
*/
public HighlightPredicate[] getHighlightPredicates() {
if (predicate.isEmpty()) return EMPTY_PREDICATE_ARRAY;
return predicate.toArray(new HighlightPredicate[predicate.size()]);
}
}
//------------------------ coordinates
public static class RowGroupHighlightPredicate implements HighlightPredicate {
private int linesPerGroup;
/**
* Instantiates a predicate with the given grouping.
*
* @param linesPerGroup number of lines constituting a group, must
* be > 0
* @throws IllegalArgumentException if linesPerGroup < 1
*/
public RowGroupHighlightPredicate(int linesPerGroup) {
if (linesPerGroup < 1)
throw new IllegalArgumentException("a group contain at least 1 row, was: " + linesPerGroup);
this.linesPerGroup = linesPerGroup;
}
/**
* {@inheritDoc}
* Implemented to return true if the adapter's row falls into a
* odd group number.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
// JW: oddness check is okay - adapter.row must be a valid view coordinate
return (adapter.row / linesPerGroup) % 2 == 1;
}
/**
*
* @return the number of lines per group.
*/
public int getLinesPerGroup() {
return linesPerGroup;
}
}
/**
* A HighlightPredicate based on column index.
*
*/
public static class ColumnHighlightPredicate implements HighlightPredicate {
List<Integer> columnList;
/**
* Instantiates a predicate which returns true for the
* given columns in model coodinates.
*
* @param columns the columns to highlight in model coordinates.
*/
public ColumnHighlightPredicate(int... columns) {
columnList = new ArrayList<Integer>();
for (int i = 0; i < columns.length; i++) {
columnList.add(columns[i]);
}
}
/**
* {@inheritDoc}
*
* This implementation returns true if the adapter's column
* is contained in this predicates list.
*
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
int modelIndex = adapter.convertColumnIndexToModel(adapter.column);
return columnList.contains(modelIndex);
}
/**
* PENDING JW: get array of int instead of Integer?
*
* @return the columns indices in model coordinates to highlight
*/
public Integer[] getColumns() {
if (columnList.isEmpty()) return EMPTY_INTEGER_ARRAY;
return columnList.toArray(new Integer[columnList.size()]);
}
}
/**
* A HighlightPredicate based on column identifier.
*
*/
public static class IdentifierHighlightPredicate implements HighlightPredicate {
List<Object> columnList;
/**
* Instantiates a predicate which returns true for the
* given column identifiers.
*
* @param columns the identitiers of the columns to highlight.
*/
public IdentifierHighlightPredicate(Object... columns) {
columnList = new ArrayList<Object>();
for (int i = 0; i < columns.length; i++) {
columnList.add(columns[i]);
}
}
/**
* {@inheritDoc}
*
* This implementation returns true if the adapter's column
* is contained in this predicates list.
*
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
int modelIndex = adapter.convertColumnIndexToModel(adapter.column);
Object identifier = adapter.getColumnIdentifierAt(modelIndex);
return identifier != null ? columnList.contains(identifier) : false;
}
/**
* @return the identifiers
*/
public Object[] getIdentifiers() {
if (columnList.isEmpty()) return EMPTY_OBJECT_ARRAY;
return columnList.toArray(new Object[0]);
}
}
/**
* A {@code HighlightPredicate} based on adapter depth.
*
* @author Karl Schaefer
*/
public static class DepthHighlightPredicate implements HighlightPredicate {
private List<Integer> depthList;
/**
* Instantiates a predicate which returns true for the
* given depths.
*
* @param depths the depths to highlight
*/
public DepthHighlightPredicate(int... depths) {
depthList = new ArrayList<Integer>();
for (int i = 0; i < depths.length; i++) {
depthList.add(depths[i]);
}
}
/**
* {@inheritDoc}
*
* This implementation returns true if the adapter's depth is contained
* in this predicates list.
*
*/
public boolean isHighlighted(Component renderer,
ComponentAdapter adapter) {
int depth = adapter.getDepth();
return depthList.contains(depth);
}
/**
* @return array of numbers representing different depths
*/
public Integer[] getDepths() {
if (depthList.isEmpty()) return EMPTY_INTEGER_ARRAY;
return depthList.toArray(new Integer[depthList.size()]);
}
}
//--------------------- value testing
/**
* Predicate testing the componentAdapter value against a fixed
* Object.
*/
public static class EqualsHighlightPredicate implements HighlightPredicate {
private Object compareValue;
/**
* Instantitates a predicate with null compare value.
*
*/
public EqualsHighlightPredicate() {
this(null);
}
/**
* Instantiates a predicate with the given compare value.
* PENDING JW: support array?
* @param compareValue the fixed value to compare the
* adapter against.
*/
public EqualsHighlightPredicate(Object compareValue) {
this.compareValue = compareValue;
}
/**
* {@inheritDoc}
*
* Implemented to return true if the adapter value equals the
* this predicate's compare value.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
if (compareValue == null) return adapter.getValue() == null;
return compareValue.equals(adapter.getValue());
}
/**
* @return the value this predicate checks against.
*/
public Object getCompareValue() {
return compareValue;
}
}
/**
* Predicate testing the componentAdapter value type against a given
* Class.
*/
public static class TypeHighlightPredicate implements HighlightPredicate {
private Class<?> clazz;
/**
* Instantiates a predicate with Object.clazz. This is essentially the
* same as testing against null.
*
*/
public TypeHighlightPredicate() {
this(Object.class);
}
/**
* Instantiates a predicate with the given compare class.<p>
*
* PENDING JW: support array?
*
* @param compareValue the fixed class to compare the
* adapter value against.
*/
public TypeHighlightPredicate(Class<?> compareValue) {
this.clazz = compareValue;
}
/**
* {@inheritDoc}
*
* Implemented to return true if the adapter value is an instance
* of this predicate's class type.
*/
public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
return adapter.getValue() != null ?
clazz.isAssignableFrom(adapter.getValue().getClass()) : false;
}
/**
* @return type of predicate compare class
*/
public Class<?> getType() {
return clazz;
}
}
/**
* Predicate testing the componentAdapter column type against a given
* Clazz. Would be nice-to-have - but can't because the ComponentAdapter doesn't
* expose the columnClass. Should it?
*/
// @KEEP
// public static class ColumnTypeHighlightPredicate implements HighlightPredicate {
//
// private Class clazz;
//
// /**
// * Instantitates a predicate with Object.clazz. This is essentially the
// * same as testing against null.
// *
// */
// public ColumnTypeHighlightPredicate() {
// this(Object.class);
// }
// /**
// * Instantitates a predicate with the given compare class.
// * @param compareValue the fixed class to compare the
// * adapter value against.
// */
// public ColumnTypeHighlightPredicate(Class compareValue) {
// this.clazz = compareValue;
// }
//
// /**
// * @inheritDoc
// *
// * Implemented to return true if the adapter value is an instance
// * of this predicate's class type.
// */
// public boolean isHighlighted(Component renderer, ComponentAdapter adapter) {
// int modelColumn = adapter.viewToModel(columnIndex)
// return clazz.isAssignableFrom(adapter.getColumnClass(columnIndex));
// }
//
// }
}