Example usage for com.google.gwt.dom.client DataTransfer getData

Introduction

In this page you can find the example usage for com.google.gwt.dom.client DataTransfer getData.

Prototype

public final native String getData(String format) ;

Source Link

Document

Get the data for the specified format.

Usage

From source file:com.google.gwt.sample.mobilewebapp.client.desktop.DesktopTaskEditView.java

License:Apache License

/**
 * Construct a new {@link DesktopTaskEditView}.
 *///  w w  w.ja v a  2  s.  c  om
public DesktopTaskEditView() {
    // Initialize the styles.
    resources = GWT.create(Resources.class);
    resources.style().ensureInjected();

    // Create the template list.
    templateList = createTaskTemplateList();

    initWidget(uiBinder.createAndBindUi(this));
    nameEditor = EditorDecorator.create(nameField.asEditor(), nameViolation);
    driver.initialize(this);

    // Hide the template list if it isn't supported.
    if (!DragDropEventBase.isSupported()) {
        dockLayoutPanel.setWidgetSize(templateListContainer, 0);
    }

    // Create a new task or modify the current task when done is pressed.
    saveButton.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            if (presenter != null) {
                presenter.saveTask();
            }
        }
    });

    // Delete the current task or cancel when delete is pressed.
    deleteButton.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            if (presenter != null) {
                presenter.deleteTask();
            }
        }
    });

    // Add the form as a drop target.
    editForm.addDomHandler(new DragOverHandler() {
        public void onDragOver(DragOverEvent event) {
            // Highlight the name and notes box.
            nameField.getElement().getStyle().setBackgroundColor("#ffa");
            notesEditor.getElement().getStyle().setBackgroundColor("#ffa");
        }
    }, DragOverEvent.getType());
    editForm.addDomHandler(new DragLeaveHandler() {
        public void onDragLeave(DragLeaveEvent event) {
            EventTarget eventTarget = event.getNativeEvent().getEventTarget();
            if (!Element.is(eventTarget)) {
                return;
            }
            Element target = Element.as(eventTarget);

            if (target == editForm.getElement()) {
                // Un-highlight the name and notes box.
                nameField.getElement().getStyle().clearBackgroundColor();
                notesEditor.getElement().getStyle().clearBackgroundColor();
            }
        }
    }, DragLeaveEvent.getType());
    editForm.addDomHandler(new DropHandler() {
        public void onDrop(DropEvent event) {
            // Prevent the default text drop.
            event.preventDefault();

            // Un-highlight the name and notes box.
            nameField.getElement().getStyle().clearBackgroundColor();
            notesEditor.getElement().getStyle().clearBackgroundColor();

            // Fill in the form.
            try {
                // Get the template the from the data transfer object.
                DataTransfer dataTransfer = event.getNativeEvent().getDataTransfer();
                int templateIndex = Integer.parseInt(dataTransfer.getData("text"));
                TaskProxy template = templateList.getVisibleItem(templateIndex);
                nameField.setValue(template.getName());
                notesEditor.setValue(template.getNotes());
            } catch (NumberFormatException e) {
                // The user probably dragged something other than a template.
            }
        }
    }, DropEvent.getType());
}

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