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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.netbeans.modules.image;


import java.awt.Dialog;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import org.openide.DialogDescriptor;
import org.openide.NotifyDescriptor;
import org.openide.DialogDisplayer;
import org.openide.awt.ActionID;
import org.openide.awt.ActionRegistration;
import org.openide.util.actions.CallableSystemAction;
import org.openide.util.HelpCtx;
import org.openide.util.NbBundle;
import org.openide.windows.TopComponent;


/** Action that can always be invoked and work procedurally.
 *
 * @author  Lukas Tadial
 */
@ActionID(id = "org.netbeans.modules.image.CustomZoomAction", category = "View")
@ActionRegistration(lazy = false, displayName = "#LBL_CustomZoom")
public class CustomZoomAction extends CallableSystemAction {


    /** Generated serial version UID. */
    static final long serialVersionUID = 8247068408606777895L;


    /** Actually performs action. */
    @Override
    public void performAction () {
        final Dialog[] dialogs = new Dialog[1];
        final CustomZoomPanel zoomPanel = new CustomZoomPanel();

        zoomPanel.setEnlargeFactor(1);
        zoomPanel.setDecreaseFactor(1);

        DialogDescriptor dd = new DialogDescriptor(
            zoomPanel,
            NbBundle.getMessage(CustomZoomAction.class, "LBL_CustomZoomAction"),
            true,
            DialogDescriptor.OK_CANCEL_OPTION,
            DialogDescriptor.OK_OPTION,
            new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent ev) {
                    if (ev.getSource() == DialogDescriptor.OK_OPTION) {
                        int enlargeFactor;
                        int decreaseFactor;

                        try {
                            enlargeFactor = zoomPanel.getEnlargeFactor();
                            decreaseFactor = zoomPanel.getDecreaseFactor();
                        } catch (NumberFormatException nfe) {
                            notifyInvalidInput();
                            return;
                        }

                        // Invalid values.
                        if(enlargeFactor == 0 || decreaseFactor == 0) {
                            notifyInvalidInput();
                            return;
                        }

                        performZoom(enlargeFactor, decreaseFactor);

                        dialogs[0].setVisible(false);
                        dialogs[0].dispose();
                    } else {
                        dialogs[0].setVisible(false);
                        dialogs[0].dispose();
                    }
                }

                private void notifyInvalidInput() {
                    DialogDisplayer.getDefault().notify(new NotifyDescriptor.Message(
                        NbBundle.getMessage(CustomZoomAction.class, "MSG_InvalidValues"),
                        NotifyDescriptor.ERROR_MESSAGE
                    ));
                }

            } // End of annonymnous ActionListener.
        );
        dialogs[0] = DialogDisplayer.getDefault().createDialog(dd);
        dialogs[0].setVisible(true);

    }

    /** Performs customized zoom. */
    private void performZoom(int enlargeFactor, int decreaseFactor) {
        TopComponent currentComponent = TopComponent.getRegistry().getActivated();
        if(currentComponent instanceof ImageViewer)
            ((ImageViewer)currentComponent).customZoom(enlargeFactor, decreaseFactor);
    }

    /** Gets action name. Implements superclass abstract method. */
    @Override
    public String getName () {
        return NbBundle.getMessage(CustomZoomAction.class, "LBL_CustomZoom");
    }

    /** Gets action help context. Implemenets superclass abstract method.*/
    @Override
    public HelpCtx getHelpCtx () {
        return new HelpCtx("org.netbeans.modules.image.CustomZoomAction");
    }

    /** Gets icon resource. Overrides superclass method. */
    @Override
    protected String iconResource() {
        return "org/netbeans/modules/image/customZoom.gif"; // NOI18N
    }

    @Override
    protected boolean asynchronous() {
        return false;
    }
}