org.openxdata.sharedlib.client.view.OpenFileDialog.java Source code

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Here is the source code for org.openxdata.sharedlib.client.view.OpenFileDialog.java

Source

package org.openxdata.sharedlib.client.view;

import org.openxdata.sharedlib.client.controller.OpenFileDialogEventListener;
import org.openxdata.sharedlib.client.locale.FormsConstants;
import org.openxdata.sharedlib.client.util.FormUtil;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * Used for letting the user browse for a file to open on the local file system.
 * 
 *  www.openxdata.org - Licensed as written in license.txt and original sources of this file and its authors are found in sources.txt.
 *
 */
public class OpenFileDialog extends DialogBox {

    private FormsConstants constants = GWT.create(FormsConstants.class);

    /** The form used for posting the selected file to. */
    private FormPanel form = new FormPanel();

    /** The file upload widget. */
    private FileUpload fileUpload;

    /** Listener to the file dialog events. */
    private OpenFileDialogEventListener eventListener;

    /** The url to post the file selection to. */
    private String actionUrl;

    /**
     * Creates a new instance of the open file dialog box.
     * 
     * @param eventListener the listener to the file dialog events.
     * @param url the url to post the file to.
     */
    public OpenFileDialog(OpenFileDialogEventListener eventListener, String url) {
        this.eventListener = eventListener;
        initWidgets(url);
    }

    /**
     * Sets up the widgets.
     * 
     * @param url the url to post to.
     */
    public void initWidgets(String url) {
        actionUrl = url;
        form.setAction(actionUrl);
        form.setEncoding(FormPanel.ENCODING_MULTIPART);
        form.setMethod(FormPanel.METHOD_POST);

        VerticalPanel verticalPanel = new VerticalPanel();
        verticalPanel.setSpacing(20);
        form.add(verticalPanel);

        fileUpload = new FileUpload();
        fileUpload.setName("filecontents");
        verticalPanel.add(fileUpload);

        HorizontalPanel horizontalPanel = new HorizontalPanel();
        horizontalPanel.setWidth("100%");
        horizontalPanel.setHeight("100%");
        horizontalPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_BOTTOM);

        Button button = new Button(constants.open(), new ClickHandler() {
            public void onClick(ClickEvent event) {
                String action = actionUrl;
                if (action.contains("?"))
                    action += "&";
                else
                    action += "?";
                action += "pathname=" + fileUpload.getFilename();
                //action += "&time="+ new java.util.Date().getTime();

                form.setAction(action);
                form.submit();
                //hide();

                FormUtil.dlg.setText(constants.processingMsg());
                FormUtil.dlg.center();
            }
        });

        horizontalPanel.add(button);
        horizontalPanel.setCellHorizontalAlignment(button, HasHorizontalAlignment.ALIGN_LEFT);

        button = new Button(constants.cancel(), new ClickHandler() {
            public void onClick(ClickEvent event) {
                hide();
                FormUtil.dlg.hide();
            }
        });

        horizontalPanel.add(button);
        horizontalPanel.setCellHorizontalAlignment(button, HasHorizontalAlignment.ALIGN_RIGHT);

        verticalPanel.add(horizontalPanel);

        setWidget(form);

        form.addSubmitCompleteHandler(new SubmitCompleteHandler() {
            public void onSubmitComplete(FormPanel.SubmitCompleteEvent event) {
                eventListener.onSetFileContents(event.getResults());
                hide();
                FormUtil.dlg.hide();
            }
        });

        setText(constants.openFile());
    }
}