org.jhotdraw8.application.action.edit.UndoAction Maven / Gradle / Ivy

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/*
 * @(#)UndoAction.java
 * Copyright © 2023 The authors and contributors of JHotDraw. MIT License.
 */
package org.jhotdraw8.application.action.edit;

import javafx.beans.value.ChangeListener;
import javafx.event.ActionEvent;
import org.jhotdraw8.annotation.NonNull;
import org.jhotdraw8.application.Activity;
import org.jhotdraw8.application.ApplicationLabels;
import org.jhotdraw8.application.action.AbstractActivityAction;
import org.jhotdraw8.application.action.Action;
import org.jhotdraw8.fxbase.undo.FXUndoManager;

/**
 * Undoes the last user action.
 *
 * @author Werner Randelshofer
 */
public class UndoAction extends AbstractActivityAction {

    public static final String ID = "edit.undo";
    private final @NonNull FXUndoManager manager;

    /**
     * Creates a new instance.
     *
     * @param view    the view
     * @param manager
     */
    public UndoAction(@NonNull Activity view, @NonNull FXUndoManager manager) {
        super(view);
        this.manager = manager;
        ApplicationLabels.getResources().configureAction(this, ID);
        manager.undoableProperty().addListener((ChangeListener) (o, oldv, newv) -> {
            if (!newv) {
                disablers.add(this);
            } else {
                disablers.remove(this);
            }
        });
        if (!manager.canUndo()) {
            disablers.add(this);
        }
        manager.undoPresentationNameProperty().addListener((ChangeListener) (o, oldv, newv) -> set(Action.LABEL, newv));
    }

    @Override
    protected void onActionPerformed(@NonNull ActionEvent event, @NonNull Activity activity) {
        manager.undo();
    }
}