de.catma.ui.dialog.UploadDialog.java Source code

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Here is the source code for de.catma.ui.dialog.UploadDialog.java

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/*   
 *   CATMA Computer Aided Text Markup and Analysis
 *   
 *   Copyright (C) 2009-2013  University Of Hamburg
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.catma.ui.dialog;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;

import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.ProgressIndicator;
import com.vaadin.ui.Upload;
import com.vaadin.ui.Upload.FailedEvent;
import com.vaadin.ui.Upload.Receiver;
import com.vaadin.ui.Upload.StartedEvent;
import com.vaadin.ui.Upload.SucceededEvent;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

public class UploadDialog extends VerticalLayout {

    private static class DataReceiver implements Receiver {
        private ByteArrayOutputStream data;

        public DataReceiver(ByteArrayOutputStream data) {
            this.data = data;
        }

        public OutputStream receiveUpload(String filename, String mimeType) {
            return data;
        }
    }

    private Window dialogWindow;
    private String caption;
    private SaveCancelListener<byte[]> saveCancelListener;
    private Upload upload;
    private ProgressIndicator pi;
    private ByteArrayOutputStream data;
    private Button btCancel;

    public UploadDialog(String caption, SaveCancelListener<byte[]> saveCancelListener) {
        this.caption = caption;
        this.saveCancelListener = saveCancelListener;
        this.data = new ByteArrayOutputStream();

        initComponents();
        initActions();
    }

    private void initActions() {
        upload.addListener(new Upload.StartedListener() {
            public void uploadStarted(StartedEvent event) {
                //                   upload.setVisible(false);
                pi.setVisible(true);
                pi.setValue(0f);
                pi.setPollingInterval(500);
                upload.setCaption("Uploading file \"" + event.getFilename() + "\"");
            }
        });

        upload.addListener(new Upload.ProgressListener() {
            public void updateProgress(long readBytes, long contentLength) {
                pi.setValue(new Float(readBytes / (float) contentLength));
            }

        });

        upload.addListener(new Upload.SucceededListener() {
            public void uploadSucceeded(SucceededEvent event) {
                upload.setCaption("Uploading file \"" + event.getFilename() + "\" succeeded");
                saveCancelListener.savePressed(data.toByteArray());
                UploadDialog.this.close();
            }
        });

        upload.addListener(new Upload.FailedListener() {
            public void uploadFailed(FailedEvent event) {
                upload.setCaption("Uploading interrupted");
            }
        });
        btCancel.addListener(new ClickListener() {

            public void buttonClick(ClickEvent event) {
                upload.interruptUpload();
                dialogWindow.getParent().removeWindow(dialogWindow);
                saveCancelListener.cancelPressed();
            }
        });
    }

    private void close() {
        getApplication().getMainWindow().removeWindow(dialogWindow);
    }

    private void initComponents() {
        setSizeFull();
        setSpacing(true);

        dialogWindow = new Window(caption);
        dialogWindow.setModal(true);

        upload = new Upload("Please select a file to upload", new DataReceiver(data));
        upload.setButtonCaption("Select file");
        upload.setImmediate(true);

        addComponent(upload);
        pi = new ProgressIndicator();
        pi.setVisible(false);
        addComponent(pi);

        HorizontalLayout buttonPanel = new HorizontalLayout();
        buttonPanel.setSpacing(true);

        btCancel = new Button("Cancel");
        buttonPanel.addComponent(btCancel);

        addComponent(buttonPanel);
        this.setComponentAlignment(buttonPanel, Alignment.BOTTOM_RIGHT);

        dialogWindow.addComponent(this);

        upload.focus();

    }

    public void show(Window parent, String dialogWidth) {
        dialogWindow.setWidth(dialogWidth);
        parent.addWindow(dialogWindow);
    }

    public void show(Window parent) {
        show(parent, "25%");
    }

}