com.sun.javafx.webkit.theme.ScrollBarWidgetHelper Maven / Gradle / Ivy
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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).
*
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* 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.webkit.theme;
import com.sun.javafx.scene.control.ControlHelper;
import com.sun.javafx.util.Utils;
import javafx.scene.Node;
/**
* Used to access internal methods of ScrollBarWidget.
*/
public class ScrollBarWidgetHelper extends ControlHelper {
private static final ScrollBarWidgetHelper theInstance;
private static ScrollBarWidgetAccessor scrollBarWidgetAccessor;
static {
theInstance = new ScrollBarWidgetHelper();
Utils.forceInit(ScrollBarWidget.class);
}
private static ScrollBarWidgetHelper getInstance() {
return theInstance;
}
public static void initHelper(ScrollBarWidget scrollBarWidge) {
setHelper(scrollBarWidge, getInstance());
}
@Override
protected void updatePeerImpl(Node node) {
super.updatePeerImpl(node);
scrollBarWidgetAccessor.doUpdatePeer(node);
}
public static void setScrollBarWidgetAccessor(final ScrollBarWidgetAccessor newAccessor) {
if (scrollBarWidgetAccessor != null) {
throw new IllegalStateException();
}
scrollBarWidgetAccessor = newAccessor;
}
public interface ScrollBarWidgetAccessor {
void doUpdatePeer(Node node);
}
}