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/*
* $Id$
*
* Copyright 2009 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.jdesktop.swingx.plaf.synth;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.beans.PropertyChangeEvent;
import javax.swing.JComponent;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.plaf.synth.ColorType;
import javax.swing.plaf.synth.Region;
import javax.swing.plaf.synth.SynthConstants;
import javax.swing.plaf.synth.SynthContext;
import javax.swing.plaf.synth.SynthLookAndFeel;
import javax.swing.plaf.synth.SynthPainter;
import javax.swing.plaf.synth.SynthStyle;
/**
* Utility class as stand-in for package private synth utility methods.
*
* @author Jeanette Winzenburg
*/
public class SynthUtils {
//----------------------- context-related
/**
* Used to avoid null painter checks everywhere.
*/
private static SynthPainter NULL_PAINTER = new SynthPainter() {};
/**
* Returns a SynthContext with the specified values.
*
* @param component JComponent
* @param region Identifies the portion of the JComponent
* @param style Style associated with the component
* @param state State of the component as defined in SynthConstants.
* @return a SynthContext with the specified values.
*
* @throws NullPointerException if component, region of style is null.
*
*/
public static SynthContext getContext(JComponent c, Region region, SynthStyle style, int state) {
return new SynthContext(c, region, style, state);
}
/**
* @param context
* @param style
* @return
*/
public static SynthContext getContext(SynthContext context, SynthStyle style) {
if (context.getStyle().equals(style)) return context;
return getContext(context.getComponent(), context.getRegion(), style, context.getComponentState());
}
/**
* Returns a context with the given component state and all other fields same as input context.
*
* @param context the context, must not be null
* @param state the component state.
* @return a context with the given component state and other fields as inpu context.
*/
public static SynthContext getContext(SynthContext context, int state) {
if (context.getComponentState() == state) return context;
return getContext(context.getComponent(), context.getRegion(), context.getStyle(), state);
}
/**
* Returns a SynthPainter from the context's style. Fall-back to default if
* none available.
*
* @param context SynthContext containing the style, must not be null.
* @return a SynthPainter from the context's style, or a default if null.
*/
public static SynthPainter getPainter(SynthContext context) {
SynthPainter painter = context.getStyle().getPainter(context);
return painter != null ? painter : NULL_PAINTER;
}
//------------------- style-related
/**
* Returns true if the Style should be updated in response to the
* specified PropertyChangeEvent. This forwards to
* shouldUpdateStyleOnAncestorChanged as necessary.
*/
public static boolean shouldUpdateStyle(PropertyChangeEvent event) {
String eName = event.getPropertyName();
if ("name" == eName) {
// Always update on a name change
return true;
}
else if ("componentOrientation" == eName) {
// Always update on a component orientation change
return true;
}
else if ("ancestor" == eName && event.getNewValue() != null) {
// Only update on an ancestor change when getting a valid
// parent and the LookAndFeel wants this.
LookAndFeel laf = UIManager.getLookAndFeel();
return (laf instanceof SynthLookAndFeel &&
((SynthLookAndFeel)laf).
shouldUpdateStyleOnAncestorChanged());
}
// Note: The following two nimbus based overrides should be refactored
// to be in the Nimbus LAF. Due to constraints in an update release,
// we couldn't actually provide the public API necessary to allow
// NimbusLookAndFeel (a subclass of SynthLookAndFeel) to provide its
// own rules for shouldUpdateStyle.
else if ("Nimbus.Overrides" == eName) {
// Always update when the Nimbus.Overrides client property has
// been changed
return true;
}
else if ("Nimbus.Overrides.InheritDefaults" == eName) {
// Always update when the Nimbus.Overrides.InheritDefaults
// client property has changed
return true;
}
else if ("JComponent.sizeVariant" == eName) {
// Always update when the JComponent.sizeVariant
// client property has changed
return true;
}
return false;
}
//--------------- component related
public static int getComponentState(JComponent c) {
if (c.isEnabled()) {
if (c.isFocusOwner()) {
return SynthConstants.ENABLED | SynthConstants.FOCUSED;
}
return SynthConstants.ENABLED;
}
return SynthConstants.DISABLED;
}
// ---------------- divers ...
/**
* A convenience method that handles painting of the background. All SynthUI
* implementations should override update and invoke this method.
*
* @param context must not be null
* @param g must not be null
*/
public static void update(SynthContext context, Graphics g) {
update(context, g, null);
}
/**
* A convenience method that handles painting of the background. All SynthUI
* implementations should override update and invoke this method.
*
* @param context must not be null
* @param g must not be null
* @param the bounds to fill, may be null to indicate the complete size
*/
public static void update(SynthContext context, Graphics g, Rectangle bounds) {
JComponent c = context.getComponent();
SynthStyle style = context.getStyle();
int x, y, width, height;
if (bounds == null) {
x = 0;
y = 0;
width = c.getWidth();
height = c.getHeight();
} else {
x = bounds.x;
y = bounds.y;
width = bounds.width;
height = bounds.height;
}
// Fill in the background, if necessary.
boolean subregion = context.getRegion().isSubregion();
if ((subregion && style.isOpaque(context))
|| (!subregion && c.isOpaque())) {
g.setColor(style.getColor(context, ColorType.BACKGROUND));
g.fillRect(x, y, width, height);
}
}
}