org.drools.brms.client.packages.AssetAttachmentFileWidget.java Source code

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Here is the source code for org.drools.brms.client.packages.AssetAttachmentFileWidget.java

Source

package org.drools.brms.client.packages;
/*
 * Copyright 2005 JBoss Inc
 *
 * 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.
 */

import org.drools.brms.client.common.ErrorPopup;
import org.drools.brms.client.common.FormStyleLayout;
import org.drools.brms.client.common.HTMLFileManagerFields;
import org.drools.brms.client.common.ImageButton;
import org.drools.brms.client.common.LoadingPopup;
import org.drools.brms.client.rpc.RuleAsset;
import org.drools.brms.client.ruleeditor.RuleViewer;

import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FormHandler;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormSubmitCompleteEvent;
import com.google.gwt.user.client.ui.FormSubmitEvent;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

/**
 * This wraps a file uploader utility for model packages.
 * Model packages are jar files.
 *
 * @author Michael Neale
 * @author Fernando Meyer
 */

public abstract class AssetAttachmentFileWidget extends Composite {

    private FormPanel form;
    private ImageButton ok;
    private RuleViewer viewer;
    private FormStyleLayout layout;
    private RuleAsset asset;

    public AssetAttachmentFileWidget(final RuleAsset asset, final RuleViewer viewer) {
        this.viewer = viewer;
        this.asset = asset;
        initWidgets(asset.uuid, asset.metaData.name);
        initAssetHandlers();
    }

    protected void initWidgets(final String uuid, String formName) {
        form = new FormPanel();
        form.setAction(GWT.getModuleBaseURL() + "asset");
        form.setEncoding(FormPanel.ENCODING_MULTIPART);
        form.setMethod(FormPanel.METHOD_POST);

        FileUpload up = new FileUpload();
        up.setName(HTMLFileManagerFields.UPLOAD_FIELD_NAME_ATTACH);
        HorizontalPanel fields = new HorizontalPanel();
        fields.add(getHiddenField(HTMLFileManagerFields.FORM_FIELD_UUID, uuid));

        ok = new ImageButton("images/upload.gif", "Upload");

        fields.add(up);
        fields.add(new Label("upload:"));
        fields.add(ok);

        form.add(fields);

        layout = new FormStyleLayout(getIcon(), formName);

        if (!this.asset.isreadonly)
            layout.addAttribute("Upload new version:", form);

        Button dl = new Button("Download");
        dl.addClickListener(new ClickListener() {
            public void onClick(Widget w) {
                Window.open(GWT.getModuleBaseURL() + "asset?" + HTMLFileManagerFields.FORM_FIELD_UUID + "=" + uuid,
                        "downloading", "resizable=no,scrollbars=yes,status=no");
            }
        });
        layout.addAttribute("Download current version:", dl);

        ok.addClickListener(new ClickListener() {
            public void onClick(Widget w) {
                showUploadingBusy();
                submitUpload();
            }
        });

        initWidget(layout);
        layout.setWidth("100%");
        this.setStyleName(getOverallStyleName());
    }

    /**
     * @return The path to the icon to use.
     */
    public abstract String getIcon();

    /**
     * return the overall style name to use.
     */
    public abstract String getOverallStyleName();

    void initAssetHandlers() {
        form.addFormHandler(new FormHandler() {

            public void onSubmit(FormSubmitEvent ev) {
            }

            public void onSubmitComplete(FormSubmitCompleteEvent ev) {
                LoadingPopup.close();
                if (ev.getResults().indexOf("OK") > -1) {
                    viewer.refreshDataAndView();
                } else {
                    ErrorPopup.showMessage("Unable to upload the file.");
                }
            }

        });
    }

    protected void submitUpload() {
        form.submit();

    }

    protected void showUploadingBusy() {
        LoadingPopup.showMessage("Uploading...");
    }

    private TextBox getHiddenField(String name, String value) {
        TextBox t = new TextBox();
        t.setName(name);
        t.setText(value);
        t.setVisible(false);
        return t;
    }

    public void addDescription(Widget d) {
        this.layout.addRow(d);

    }

}