Example usage for com.google.gwt.gears.client.desktop Desktop openFiles

Introduction

In this page you can find the example usage for com.google.gwt.gears.client.desktop Desktop openFiles.

Prototype

public void openFiles(OpenFilesHandler handler, String[] filter) 

Source Link

Document

Provides user-driven access to files on the client machine.

Usage

From source file:com.google.gwt.gears.sample.uploaddemo.client.UploadDemo.java

License:Apache License

/**
 * This is the entry point method.//from ww w. jav a 2  s .c  om
 */
public void onModuleLoad() {
    root = RootPanel.get();

    final Button browse = new Button("Browse");

    final Button upload = new Button("Upload");
    upload.setEnabled(false);

    final TextBox selected = new TextBox();
    selected.setEnabled(false);

    final SimplePanel progressInner = new SimplePanel();
    progressInner.addStyleName("progressInner");

    final SimplePanel progressGauge = new SimplePanel();
    progressGauge.addStyleName("progressGauge");
    progressGauge.add(progressInner);

    final HTML result = new HTML();

    browse.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            Desktop desktop = factory.createDesktop();
            desktop.openFiles(new OpenFilesHandler() {

                public void onOpenFiles(OpenFilesEvent event) {
                    File[] files = event.getFiles();
                    selected.setText(files[0].getName());
                    selectedFile = files[0].getBlob();
                    upload.setEnabled(true);
                }
            }, true);
        }
    });

    upload.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            HttpRequest request = factory.createHttpRequest();
            request.open("POST", GWT.getModuleBaseURL() + "upload");
            request.setRequestHeader("X-Filename", selected.getText());

            request.setCallback(new RequestCallback() {
                public void onResponseReceived(HttpRequest request) {
                    String msg = request.getStatus() + " " + request.getResponseText();
                    if (request.getStatus() != 200) {
                        result.setHTML("<p style=\"color:red\">" + msg + "</p>");
                    } else {
                        result.setHTML("<p style=\"color:green\">" + msg + "</p>");
                    }
                }
            });

            request.getUpload().setProgressHandler(new ProgressHandler() {
                public void onProgress(ProgressEvent event) {
                    double pcnt = ((double) event.getLoaded() / event.getTotal());
                    progressInner.setWidth((int) Math.floor(pcnt * 100) + "%");
                }
            });
            request.send(selectedFile);
        }
    });

    HorizontalPanel inputPanel = new HorizontalPanel();
    inputPanel.add(selected);
    inputPanel.add(browse);
    inputPanel.add(upload);

    root.add(inputPanel);
    root.add(new HTML("Progress:"));
    root.add(progressGauge);
    root.add(result);
}

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