dorkbox.util.javaFx.JavaFX Maven / Gradle / Ivy
Show all versions of Utilities Show documentation
/*
* Copyright 2016 dorkbox, llc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package dorkbox.util.javaFx;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import org.slf4j.LoggerFactory;
import dorkbox.util.OS;
import dorkbox.util.swt.Swt;
/**
* Utility methods for JavaFX.
*
* We use reflection for these methods so that we can compile everything under a version of Java that might now have JavaFX.
*/
public
class JavaFX {
public final static boolean isLoaded;
public final static boolean isGtk3;
// Methods are cached for performance
private static final Method dispatchMethod;
private static final Method isEventThreadMethod;
private static final Object isEventThreadObject;
static {
// There is a silly amount of redirection, simply because we have to be able to access JavaFX, but only if it's in use.
// Since this class is the place other code interacts with, we can use JavaFX stuff if necessary without loading/linking
// the JavaFX classes by accident
// We cannot use getToolkit(), because if JavaFX is not being used, calling getToolkit() will initialize it...
// see: https://bugs.openjdk.java.net/browse/JDK-8090933
boolean isJavaFxLoaded_ = false;
try {
// this is important to use reflection, because if JavaFX is not being used, calling getToolkit() will initialize it...
java.lang.reflect.Method m = ClassLoader.class.getDeclaredMethod("findLoadedClass", String.class);
m.setAccessible(true);
ClassLoader cl = ClassLoader.getSystemClassLoader();
// JavaFX Java7,8 is GTK2 only. Java9 can have it be GTK3 if -Djdk.gtk.version=3 is specified
// see http://mail.openjdk.java.net/pipermail/openjfx-dev/2016-May/019100.html
isJavaFxLoaded_ = (null != m.invoke(cl, "com.sun.javafx.tk.Toolkit")) || (null != m.invoke(cl, "javafx.application.Application"));
} catch (Throwable e) {
LoggerFactory.getLogger(JavaFX.class).debug("Error detecting if JavaFX is loaded", e);
}
boolean isJavaFxGtk3_ = false;
if (isJavaFxLoaded_) {
// JavaFX Java7,8 is GTK2 only. Java9 can MAYBE have it be GTK3 if `-Djdk.gtk.version=3` is specified
// see
// http://mail.openjdk.java.net/pipermail/openjfx-dev/2016-May/019100.html
// https://docs.oracle.com/javafx/2/system_requirements_2-2-3/jfxpub-system_requirements_2-2-3.htm
// from the page: JavaFX 2.2.3 for Linux requires gtk2 2.18+.
if (OS.javaVersion >= 9) {
// HILARIOUSLY enough, you can use JavaFX + SWT..... And the javaFX GTK version info SHOULD
// be based on what SWT has loaded
// https://github.com/teamfx/openjfx-9-dev-rt/blob/master/modules/javafx.graphics/src/main/java/com/sun/glass/ui/gtk/GtkApplication.java
if (Swt.isLoaded && !Swt.isGtk3) {
isJavaFxGtk3_ = AccessController.doPrivileged(new PrivilegedAction() {
@Override
public
Boolean run() {
String version = System.getProperty("jdk.gtk.version", "2");
return "3".equals(version) || version.startsWith("3.");
}
});
}
}
}
isLoaded = isJavaFxLoaded_;
isGtk3 = isJavaFxGtk3_;
Method _isEventThreadMethod = null;
Method _dispatchMethod = null;
Object _isEventThreadObject = null;
if (isJavaFxLoaded_) {
try {
Class clazz = Class.forName("javafx.application.Platform");
_dispatchMethod = clazz.getMethod("runLater", Runnable.class);
// JAVA 7
// javafx.application.Platform.isFxApplicationThread();
// JAVA 8
// com.sun.javafx.tk.Toolkit.getToolkit().isFxUserThread();
if (OS.javaVersion <= 7) {
clazz = Class.forName("javafx.application.Platform");
_isEventThreadMethod = clazz.getMethod("isFxApplicationThread");
_isEventThreadObject = null;
} else {
clazz = Class.forName("com.sun.javafx.tk.Toolkit");
_isEventThreadMethod = clazz.getMethod("getToolkit");
_isEventThreadObject = _isEventThreadMethod.invoke(null);
_isEventThreadMethod = _isEventThreadObject.getClass()
.getMethod("isFxUserThread", (java.lang.Class[])null);
}
} catch (Throwable e) {
LoggerFactory.getLogger(JavaFX.class).error("Cannot initialize JavaFX", e);
}
}
dispatchMethod = _dispatchMethod;
isEventThreadMethod = _isEventThreadMethod;
isEventThreadObject = _isEventThreadObject;
}
public static
void dispatch(final Runnable runnable) {
// javafx.application.Platform.runLater(runnable);
try {
dispatchMethod.invoke(null, runnable);
} catch (Throwable e) {
LoggerFactory.getLogger(JavaFX.class)
.error("Unable to execute JavaFX runLater(). Please create an issue with your OS and Java " +
"version so we may further investigate this issue.");
}
}
public static
boolean isEventThread() {
// JAVA 7
// javafx.application.Platform.isFxApplicationThread();
// JAVA 8
// com.sun.javafx.tk.Toolkit.getToolkit().isFxUserThread();
try {
if (OS.javaVersion <= 7) {
return (Boolean) isEventThreadMethod.invoke(null);
} else {
//noinspection ConfusingArgumentToVarargsMethod
return (Boolean) isEventThreadMethod.invoke(isEventThreadObject, (java.lang.Class[])null);
}
} catch (Throwable e) {
LoggerFactory.getLogger(JavaFX.class)
.error("Unable to check if JavaFX is in the event thread. Please create an issue with your OS and Java " +
"version so we may further investigate this issue.");
}
return false;
}
public static
void onShutdown(final Runnable runnable) {
// com.sun.javafx.tk.Toolkit.getToolkit()
// .addShutdownHook(runnable);
try {
Class clazz = Class.forName("com.sun.javafx.tk.Toolkit");
Method method = clazz.getMethod("getToolkit");
Object o = method.invoke(null);
Method m = o.getClass()
.getMethod("addShutdownHook", Runnable.class);
m.invoke(o, runnable);
} catch (Throwable e) {
LoggerFactory.getLogger(JavaFX.class)
.error("Unable to insert shutdown hook into JavaFX. Please create an issue with your OS and Java " +
"version so we may further investigate this issue.");
}
}
}