| /* |
| * Copyright 2000-2009 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.util.ui.update; |
| |
| import com.intellij.openapi.Disposable; |
| import com.intellij.openapi.application.Application; |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.application.ModalityState; |
| import com.intellij.openapi.project.DumbAwareRunnable; |
| import com.intellij.openapi.util.Disposer; |
| import org.jetbrains.annotations.NotNull; |
| |
| import javax.swing.*; |
| import java.awt.*; |
| import java.awt.event.HierarchyEvent; |
| import java.awt.event.HierarchyListener; |
| import java.lang.ref.WeakReference; |
| |
| public class UiNotifyConnector implements Disposable, HierarchyListener{ |
| |
| @NotNull |
| private final WeakReference<Component> myComponent; |
| private Activatable myTarget; |
| |
| public UiNotifyConnector(@NotNull final Component component, @NotNull final Activatable target) { |
| myComponent = new WeakReference<Component>(component); |
| myTarget = target; |
| if (component.isShowing()) { |
| showNotify(); |
| } else { |
| hideNotify(); |
| } |
| component.addHierarchyListener(this); |
| } |
| |
| public void hierarchyChanged(HierarchyEvent e) { |
| if (isDisposed()) return; |
| |
| if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) > 0) { |
| final Runnable runnable = new DumbAwareRunnable() { |
| public void run() { |
| final Component c = myComponent.get(); |
| if (isDisposed() || c == null) return; |
| |
| if (c.isShowing()) { |
| showNotify(); |
| } |
| else { |
| hideNotify(); |
| } |
| } |
| }; |
| final Application app = ApplicationManager.getApplication(); |
| if (app != null && app.isDispatchThread()) { |
| app.invokeLater(runnable, ModalityState.current()); |
| } else { |
| //noinspection SSBasedInspection |
| SwingUtilities.invokeLater(runnable); |
| } |
| } |
| } |
| |
| protected void hideNotify() { |
| myTarget.hideNotify(); |
| } |
| |
| protected void showNotify() { |
| myTarget.showNotify(); |
| } |
| |
| public void dispose() { |
| if (isDisposed()) return; |
| |
| myTarget.hideNotify(); |
| final Component c = myComponent.get(); |
| if (c != null) { |
| c.removeHierarchyListener(this); |
| } |
| |
| myTarget = null; |
| myComponent.clear(); |
| } |
| |
| private boolean isDisposed() { |
| return myTarget == null; |
| } |
| |
| public static class Once extends UiNotifyConnector { |
| |
| private boolean myShown; |
| private boolean myHidden; |
| |
| public Once(final Component component, final Activatable target) { |
| super(component, target); |
| } |
| |
| protected final void hideNotify() { |
| super.hideNotify(); |
| myHidden = true; |
| disposeIfNeeded(); |
| } |
| |
| protected final void showNotify() { |
| super.showNotify(); |
| myShown = true; |
| disposeIfNeeded(); |
| } |
| |
| private void disposeIfNeeded() { |
| if (myShown && myHidden) { |
| Disposer.dispose(this); |
| } |
| } |
| } |
| |
| public static void doWhenFirstShown(@NotNull JComponent c, @NotNull final Runnable runnable) { |
| new Once(c, new Activatable() { |
| public void showNotify() { |
| runnable.run(); |
| } |
| |
| public void hideNotify() { |
| } |
| }); |
| } |
| |
| } |