scrum.client.files.UploadWidget.java Source code

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Here is the source code for scrum.client.files.UploadWidget.java

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/*
 * Copyright 2011 Witoslaw Koczewsi <wi@koczewski.de>, Artjom Kochtchi
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero 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 Affero 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 scrum.client.files;

import gwtupload.client.IFileInput.FileInputType;
import gwtupload.client.IUploadStatus;
import gwtupload.client.IUploadStatus.Status;
import gwtupload.client.IUploader;
import gwtupload.client.SingleUploader;
import gwtupload.client.Uploader;
import ilarkesto.core.logging.Log;
import ilarkesto.core.scope.Scope;

import java.util.Set;

import scrum.client.common.AScrumWidget;
import scrum.client.communication.PingServiceCall;
import scrum.client.project.Project;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.Hidden;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;

public class UploadWidget extends AScrumWidget {

    private static final Log log = Log.get(UploadWidget.class);

    private FormFlowPanel formPanel = new FormFlowPanel();
    private Button button = new Button();
    private Label statusLabel;
    private SingleUploader uploader;
    private DialogBox dialog;

    public UploadWidget() {
        statusLabel = new Label();
        uploader = new SingleUploader(FileInputType.BROWSER_INPUT, new UploadStatus(), button, formPanel);
        uploader.setAutoSubmit(true);
        Uploader.setStatusInterval(1000);
    }

    @Override
    protected Widget onInitialization() {
        uploader.addOnFinishUploadHandler(new FinishHandler());
        return uploader;
    }

    @Override
    protected void onUpdate() {
        super.onUpdate();
        button.setVisible(false);
    }

    public static UploadWidget showDialog(Integer topPosition) {
        UploadWidget uploadWidget = new UploadWidget();

        uploadWidget.dialog = new DialogBox(true, true);
        DialogBox dialog = uploadWidget.dialog;
        dialog.setAnimationEnabled(true);
        dialog.setWidget(uploadWidget.update());

        dialog.center();
        if (topPosition != null)
            dialog.setPopupPosition(dialog.getPopupLeft(), topPosition);
        dialog.show();

        return uploadWidget;
    }

    public DialogBox getDialog() {
        return dialog;
    }

    private class FinishHandler implements IUploader.OnFinishUploaderHandler {

        @Override
        public void onFinish(IUploader ul) {
            if (ul.getStatus() != Status.SUCCESS) {
                new PingServiceCall().execute();
                if (dialog != null)
                    dialog.hide();
            }
        }

    }

    private class UploadStatus implements IUploadStatus {

        private Status status;
        private String filename;

        @Override
        public HandlerRegistration addCancelHandler(UploadCancelHandler handler) {
            return null;
        }

        @Override
        public Status getStatus() {
            return status;
        }

        @Override
        public Widget getWidget() {
            return statusLabel;
        }

        @Override
        public IUploadStatus newInstance() {
            return null;
        }

        @Override
        public void setCancelConfiguration(Set<CancelBehavior> config) {
            Log.DEBUG("----------------------> setCancelConfiguration()");
        }

        @Override
        public void setError(String error) {
            log.error("Upload failed: " + error);
            Window.alert("Upload failed: " + error);
            statusLabel.setText(error);
        }

        @Override
        public void setFileName(String name) {
            this.filename = name;
        }

        @Override
        public void setI18Constants(UploadStatusConstants strs) {
            Log.DEBUG("----------------------> setI18()");

        }

        @Override
        public void setStatus(Status status) {
            Log.DEBUG("Upload status changed:", status);
            if (this.status == null) {
                dialog.setAutoHideEnabled(false);
                formPanel.hideFileField();
                statusLabel.getElement().getStyle().setPadding(10, Unit.PX);
            } else if (status != Status.INPROGRESS && filename != null) {
                statusLabel.setText("Uploading " + filename);
            }
            this.status = status;
        }

        @Override
        public void setStatusChangedHandler(UploadStatusChangedHandler handler) {
        }

        @Override
        public void setVisible(boolean b) {
        }

        @Override
        public void setProgress(int done, int total) {
            Log.DEBUG("Progress: " + done + "/" + total);
            if (total == 0) {
                statusLabel.setText("Uploading " + filename);
            } else {
                int percent = done * 100 / total;
                statusLabel.setText("Uploading " + filename + " (" + percent + "%)");
            }
        }
    }

    public class FormFlowPanel extends FormPanel {

        FlowPanel formElements = new FlowPanel();
        Widget fileField;

        public FormFlowPanel() {
            super.add(formElements);
            Project project = Scope.get().getComponent(Project.class);
            Hidden projectIdField = new Hidden("projectId", project.getId());
            projectIdField.setID("uploadProjectId");
            add(projectIdField);
        }

        @Override
        public void add(Widget w) {
            formElements.add(w);
            if (w != button)
                fileField = w;
        }

        public void hideFileField() {
            fileField.setVisible(false);
        }
    }

}