/*
* Copyright 2000-2007 JetBrains s.r.o.
*
* 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 com.intellij.openapi.wm;
import com.intellij.openapi.ui.Painter;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.util.Disposer;
import com.intellij.util.ui.update.UiNotifyConnector;
import com.intellij.util.ui.update.Activatable;
import javax.swing.*;
import java.awt.*;
public class IdeGlassPaneUtil {
private IdeGlassPaneUtil() {
}
public static IdeGlassPane find(Component component) {
if (!(component instanceof JComponent)) throw new IllegalArgumentException("Component must be instance of JComponent");
final JRootPane root = ((JComponent)component).getRootPane();
if (root == null) new IllegalArgumentException("Component must be visible in order to find glass pane for it");
final Component gp = root.getGlassPane();
if (!(gp instanceof IdeGlassPane)) {
throw new IllegalArgumentException("Glass pane should be " + IdeGlassPane.class.getName());
}
return (IdeGlassPane)gp;
}
public static void installPainter(final JComponent target, final Painter painter, final Disposable parent) {
final UiNotifyConnector connector = new UiNotifyConnector(target, new Activatable() {
IdeGlassPane myPane;
public void showNotify() {
IdeGlassPane pane = find(target);
if (myPane != null && myPane != pane) {
myPane.removePainter(painter);
}
myPane = pane;
myPane.addPainter(target, painter, parent);
}
public void hideNotify() {
if (myPane != null) {
myPane.removePainter(painter);
}
}
});
Disposer.register(parent, connector);
}
}