| /* |
| * 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.ui; |
| |
| import com.intellij.icons.AllIcons; |
| import com.intellij.openapi.Disposable; |
| import com.intellij.openapi.actionSystem.AnActionEvent; |
| import com.intellij.openapi.actionSystem.ToggleAction; |
| import com.intellij.openapi.application.ModalityState; |
| import com.intellij.openapi.fileEditor.FileEditor; |
| import com.intellij.openapi.fileEditor.FileEditorManagerAdapter; |
| import com.intellij.openapi.fileEditor.FileEditorManagerEvent; |
| import com.intellij.openapi.fileEditor.FileEditorManagerListener; |
| import com.intellij.openapi.project.DumbAware; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Disposer; |
| import com.intellij.util.Alarm; |
| import com.intellij.util.messages.MessageBusConnection; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import javax.swing.*; |
| |
| /** |
| * @author Konstantin Bulenkov |
| */ |
| @SuppressWarnings("MethodMayBeStatic") |
| public abstract class AutoScrollFromSourceHandler implements Disposable { |
| protected final Project myProject; |
| protected final Alarm myAlarm; |
| private JComponent myComponent; |
| |
| public AutoScrollFromSourceHandler(@NotNull Project project, @NotNull JComponent view) { |
| this(project, view, null); |
| } |
| |
| public AutoScrollFromSourceHandler(@NotNull Project project, @NotNull JComponent view, @Nullable Disposable parentDisposable) { |
| myProject = project; |
| |
| if (parentDisposable != null) { |
| Disposer.register(parentDisposable, this); |
| } |
| myComponent = view; |
| myAlarm = new Alarm(this); |
| } |
| |
| protected abstract boolean isAutoScrollEnabled(); |
| |
| protected abstract void setAutoScrollEnabled(boolean enabled); |
| |
| protected abstract void selectElementFromEditor(@NotNull FileEditor editor); |
| |
| protected ModalityState getModalityState() { |
| return ModalityState.current(); |
| } |
| |
| protected long getAlarmDelay() { |
| return 500; |
| } |
| |
| public void install() { |
| final MessageBusConnection connection = myProject.getMessageBus().connect(myProject); |
| connection.subscribe(FileEditorManagerListener.FILE_EDITOR_MANAGER, new FileEditorManagerAdapter() { |
| @Override |
| public void selectionChanged(@NotNull FileEditorManagerEvent event) { |
| final FileEditor editor = event.getNewEditor(); |
| if (editor != null && myComponent.isShowing() && isAutoScrollEnabled()) { |
| myAlarm.cancelAllRequests(); |
| myAlarm.addRequest(new Runnable() { |
| @Override |
| public void run() { |
| selectElementFromEditor(editor); |
| } |
| }, getAlarmDelay(), getModalityState()); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| public void dispose() { |
| if (!myAlarm.isDisposed()) { |
| myAlarm.cancelAllRequests(); |
| } |
| } |
| |
| public ToggleAction createToggleAction() { |
| return new AutoScrollFromSourceAction(); |
| } |
| |
| private class AutoScrollFromSourceAction extends ToggleAction implements DumbAware { |
| public AutoScrollFromSourceAction() { |
| super(UIBundle.message("autoscroll.from.source.action.name"), |
| UIBundle.message("autoscroll.from.source.action.description"), |
| AllIcons.General.AutoscrollFromSource); |
| } |
| |
| public boolean isSelected(final AnActionEvent event) { |
| return isAutoScrollEnabled(); |
| } |
| |
| public void setSelected(final AnActionEvent event, final boolean flag) { |
| setAutoScrollEnabled(flag); |
| } |
| } |
| } |
| |