javafx.scene.LightBase Maven / Gradle / Ivy
/*
* Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javafx.scene;
import com.sun.javafx.collections.TrackableObservableList;
import com.sun.javafx.geom.BaseBounds;
import com.sun.javafx.geom.BoxBounds;
import com.sun.javafx.geom.transform.Affine3D;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.javafx.scene.DirtyBits;
import com.sun.javafx.scene.LightBaseHelper;
import com.sun.javafx.scene.NodeHelper;
import com.sun.javafx.scene.transform.TransformHelper;
import com.sun.javafx.sg.prism.NGLightBase;
import com.sun.javafx.sg.prism.NGNode;
import com.sun.javafx.tk.Toolkit;
import java.util.List;
import java.util.stream.Collectors;
import javafx.application.ConditionalFeature;
import javafx.application.Platform;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.ListChangeListener.Change;
import javafx.collections.ObservableList;
import javafx.scene.paint.Color;
import javafx.scene.shape.Shape3D;
import com.sun.javafx.logging.PlatformLogger;
/**
* The {@code LightBase} class provides definitions of common properties for
* objects that represent a form of light source. These properties
* include:
*
* - {@code color} - the color of the light source
* - {@code scope} - a list of nodes the light source affects
* - {@code exlusionScope} - a list of nodes the light source does not affect
*
*
*
* A node can exist in only one of the lists, if it is added to one, it is silently removed from the other. If a node
* does not exist in any list, it inherits its affected state from its parent, recursively. An exception to this is that
* a light with an empty {@code scope} affects all nodes in its scene/subscene implicitly (except for those in its
* {@code exlusionScope}) as if the root of the scene is in the {@code scope}.
* The {@code exlusionScope} is useful only for nodes that would otherwise be in scope of the light. Excluding a node is
* a convenient alternative to traversing the scenegraph hierarchy and adding all of the other nodes to the light's
* scope. Instead, the scope can remain wide and specific nodes can be excluded.
*
*
* Note that this is a conditional feature. See
* {@link javafx.application.ConditionalFeature#SCENE3D ConditionalFeature.SCENE3D}
* for more information.
*
*
* An application should not extend the {@code LightBase} class directly. Doing so may lead to
* an {@code UnsupportedOperationException} being thrown.
*
*
* @since JavaFX 8.0
*/
public abstract class LightBase extends Node {
static {
// This is used by classes in different packages to get access to
// private and package private methods.
LightBaseHelper.setLightBaseAccessor(new LightBaseHelper.LightBaseAccessor() {
@Override
public void doMarkDirty(Node node, DirtyBits dirtyBit) {
((LightBase) node).doMarkDirty(dirtyBit);
}
@Override
public void doUpdatePeer(Node node) {
((LightBase) node).doUpdatePeer();
}
@Override
public BaseBounds doComputeGeomBounds(Node node,
BaseBounds bounds, BaseTransform tx) {
return ((LightBase) node).doComputeGeomBounds(bounds, tx);
}
@Override
public boolean doComputeContains(Node node, double localX, double localY) {
return ((LightBase) node).doComputeContains(localX, localY);
}
});
}
private Affine3D localToSceneTx = new Affine3D();
{
// To initialize the class helper at the beginning of each constructor of this class
LightBaseHelper.initHelper(this);
}
/**
* Creates a new instance of {@code LightBase} class with a default Color.WHITE light source.
*/
protected LightBase() {
this(Color.WHITE);
}
/**
* Creates a new instance of {@code LightBase} class using the specified color.
*
* @param color the color of the light source
*/
protected LightBase(Color color) {
if (!Platform.isSupported(ConditionalFeature.SCENE3D)) {
String logname = LightBase.class.getName();
PlatformLogger.getLogger(logname).warning("System can't support "
+ "ConditionalFeature.SCENE3D");
}
setColor(color);
this.localToSceneTransformProperty().addListener(observable ->
NodeHelper.markDirty(this, DirtyBits.NODE_LIGHT_TRANSFORM));
}
/**
* Specifies the color of light source.
*
* @defaultValue null
*/
private ObjectProperty color;
public final void setColor(Color value) {
colorProperty().set(value);
}
public final Color getColor() {
return color == null ? null : color.get();
}
public final ObjectProperty colorProperty() {
if (color == null) {
color = new SimpleObjectProperty(LightBase.this, "color") {
@Override
protected void invalidated() {
NodeHelper.markDirty(LightBase.this, DirtyBits.NODE_LIGHT);
}
};
}
return color;
}
/**
* Defines the light on or off.
*
* @defaultValue true
*/
private BooleanProperty lightOn;
public final void setLightOn(boolean value) {
lightOnProperty().set(value);
}
public final boolean isLightOn() {
return lightOn == null ? true : lightOn.get();
}
public final BooleanProperty lightOnProperty() {
if (lightOn == null) {
lightOn = new SimpleBooleanProperty(LightBase.this, "lightOn", true) {
@Override
protected void invalidated() {
NodeHelper.markDirty(LightBase.this, DirtyBits.NODE_LIGHT);
}
};
}
return lightOn;
}
private ObservableList scope;
/**
* Gets the list of nodes that specifies the hierarchical scope of this light. Any {@code Shape3D}s in this list or
* under a {@code Parent} in this list are affected by this light, unless a closer parent exists in the
* {@code exclusionScope} list. If the list is empty, all nodes under the light's scene/subscene are affected by it
* (unless they are in the {@code exclusionScope}).
*
* @return the list of nodes that specifies the hierarchical scope of this light
* @see #getExclusionScope
*/
public ObservableList getScope() {
if (scope == null) {
scope = new TrackableObservableList<>() {
@Override
protected void onChanged(Change c) {
doOnChanged(c, exclusionScope);
}
};
}
return scope;
}
private ObservableList exclusionScope;
/**
* Gets the list of nodes that specifies the hierarchical exclusion scope of this light. Any {@code Shape3D}s in
* this list or under a {@code Parent} in this list are not affected by this light, unless a closer parent exists in
* the {@code scope} list.
* This is a convenience list for excluding nodes that would otherwise be in scope of the light.
*
* @return the list of nodes that specifies the hierarchical exclusion scope of this light
* @see #getScope
* @since 13
*/
public ObservableList getExclusionScope() {
if (exclusionScope == null) {
exclusionScope = new TrackableObservableList<>() {
@Override
protected void onChanged(Change c) {
doOnChanged(c, scope);
}
};
}
return exclusionScope;
}
private void doOnChanged(Change c, ObservableList otherScope) {
NodeHelper.markDirty(this, DirtyBits.NODE_LIGHT_SCOPE);
while (c.next()) {
c.getRemoved().forEach(this::markChildrenDirty);
c.getAddedSubList().forEach(node -> {
if (otherScope != null && otherScope.remove(node)) {
return; // the other list will take care of the change
}
markChildrenDirty(node);
});
}
}
@Override
void scenesChanged(final Scene newScene, final SubScene newSubScene,
final Scene oldScene, final SubScene oldSubScene) {
// This light is owned by the Scene/SubScene, and thus must change
// accordingly. Note lights can owned by either a Scene or SubScene,
// but not both.
if (oldSubScene != null) {
oldSubScene.removeLight(this);
} else if (oldScene != null) {
oldScene.removeLight(this);
}
if (newSubScene != null) {
newSubScene.addLight(this);
} else if (newScene != null) {
newScene.addLight(this);
}
}
private void markOwnerDirty() {
// if the light is part of the scene/subScene, we will need to notify
// the owner to mark the entire scene/subScene dirty.
SubScene subScene = getSubScene();
if (subScene != null) {
subScene.markContentDirty();
} else {
Scene scene = getScene();
if (scene != null) {
scene.setNeedsRepaint();
}
}
}
/**
* Marks dirty all the 3D shapes that had their scoped/excluded state change. The method recursively traverses the
* given node's graph top-down to find all the leaves (3D shapes). Nodes that are not contained in one of the scope
* lists inherit their parent's scope, and nodes that are contained in one of the lists override their parent's
* state. For this reason, when traversing the graph, if a node that is contained in a list is reached, its branch
* is skipped.
*
* @param node the node that was added/removed from a scope
*/
private void markChildrenDirty(Node node) {
if (node instanceof Shape3D) {
// Dirty using a lightweight DirtyBits.NODE_DRAWMODE bit
NodeHelper.markDirty(((Shape3D) node), DirtyBits.NODE_DRAWMODE);
} else if (node instanceof Parent) {
for (Node child : ((Parent) node).getChildren()) {
if ((scope != null && getScope().contains(child)) ||
(exclusionScope != null && getExclusionScope().contains(child))) {
continue; // child overrides parent, no need to propagate the change
}
markChildrenDirty(child);
}
}
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private void doMarkDirty(DirtyBits dirtyBit) {
if ((scope == null) || getScope().isEmpty()) {
// This light affects the entire scene/subScene
markOwnerDirty();
} else if (dirtyBit != DirtyBits.NODE_LIGHT_SCOPE) {
// Skip NODE_LIGHT_SCOPE dirty since it is processed on scope change.
getScope().forEach(this::markChildrenDirty);
}
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private void doUpdatePeer() {
NGLightBase peer = getPeer();
if (isDirty(DirtyBits.NODE_LIGHT)) {
peer.setColor((getColor() == null) ?
Toolkit.getPaintAccessor().getPlatformPaint(Color.WHITE)
: Toolkit.getPaintAccessor().getPlatformPaint(getColor()));
peer.setLightOn(isLightOn());
}
if (isDirty(DirtyBits.NODE_LIGHT_SCOPE)) {
if (scope != null) {
if (getScope().isEmpty()) {
peer.setScope(List.of());
} else {
peer.setScope(getScope().stream().map(n -> n.getPeer()).collect(Collectors.toList()));
}
}
if (exclusionScope != null) {
if (getExclusionScope().isEmpty()) {
peer.setExclusionScope(List.of());
} else {
peer.setExclusionScope(getExclusionScope().stream().map(n -> n.getPeer()).collect(Collectors.toList()));
}
}
}
if (isDirty(DirtyBits.NODE_LIGHT_TRANSFORM)) {
localToSceneTx.setToIdentity();
TransformHelper.apply(getLocalToSceneTransform(), localToSceneTx);
// TODO: 3D - For now, we are treating the scene as world. This may need to change
// for the fixed eye position case.
peer.setWorldTransform(localToSceneTx);
}
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private BaseBounds doComputeGeomBounds(BaseBounds bounds, BaseTransform tx) {
// TODO: 3D - Check is this the right default
return new BoxBounds();
}
/*
* Note: This method MUST only be called via its accessor method.
*/
private boolean doComputeContains(double localX, double localY) {
// TODO: 3D - Check is this the right default
return false;
}
}