com.sun.javafx.stage.StageHelper Maven / Gradle / Ivy
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* 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.
*
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*/
package com.sun.javafx.stage;
import javafx.collections.ObservableList;
import javafx.stage.Stage;
/**
* Utility class class used for accessing certain implementation-specific
* runtime functionality.
*/
public class StageHelper {
private static StageAccessor stageAccessor;
public static interface StageAccessor {
public ObservableList getStages();
}
/**
* Returns a ObservableList containing {@code Stage}s created at this point.
*
* Note that application must use/reference javafx.stage.Stage class prior to
* using this method (for example, by creating a Stage).
*
* @return ObservableList containing existing stages
*/
public static ObservableList getStages() {
if (stageAccessor == null) {
try {
// Force stage static initialization, see http://java.sun.com/j2se/1.5.0/compatibility.html
Class.forName(Stage.class.getName(), true, Stage.class.getClassLoader());
} catch (ClassNotFoundException ex) {
// Cannot happen
}
}
return stageAccessor.getStages();
}
public static void setStageAccessor(StageAccessor a) {
if (stageAccessor != null) {
System.out.println("Warning: Stage accessor already set: " + stageAccessor);
Thread.dumpStack();
}
stageAccessor = a;
}
}