@Override
public HandlerRegistration addDragStartHandler(DragStartHandler handler) {
return handlers.addHandler(DragStartEvent.getType(), handler);
}
private DocTab(
ImageResource icon,
String docId,
String title,
String tooltip,
TabCloseObserver closeHandler) {
docId_ = docId;
final HorizontalPanel layoutPanel = new HorizontalPanel();
layoutPanel.setStylePrimaryName(styles_.tabLayout());
layoutPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_BOTTOM);
layoutPanel.getElement().setDraggable("true");
layoutPanel.addDomHandler(
new DragStartHandler() {
@Override
public void onDragStart(DragStartEvent evt) {
evt.getDataTransfer()
.setData(
getDataTransferFormat(),
docId_ + "|" + SourceWindowManager.getSourceWindowId());
JsObject dt = evt.getDataTransfer().cast();
dt.setString("effectAllowed", "move");
// figure out where the cursor is inside the element; because the
// drag shows an image of the tab, knowing where the cursor is
// inside that image is necessary for us to know the screen
// location of the dragged image
int evtX = evt.getNativeEvent().getClientX();
ElementEx ele = getElement().cast();
events_.fireEvent(
new DocTabDragInitiatedEvent(
docId_,
getElement().getClientWidth(),
evtX - ele.getBoundingClientRect().getLeft()));
}
},
DragStartEvent.getType());
HTML left = new HTML();
left.setStylePrimaryName(styles_.tabLayoutLeft());
layoutPanel.add(left);
contentPanel_ = new HorizontalPanel();
contentPanel_.setTitle(tooltip);
contentPanel_.setStylePrimaryName(styles_.tabLayoutCenter());
contentPanel_.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
if (icon != null) contentPanel_.add(imageForIcon(icon));
label_ = new Label(title, false);
label_.addStyleName(styles_.docTabLabel());
contentPanel_.add(label_);
appendDirtyMarker();
Image img = new Image(ThemeResources.INSTANCE.closeTab());
img.setStylePrimaryName(styles_.closeTabButton());
img.addStyleName(ThemeStyles.INSTANCE.handCursor());
contentPanel_.add(img);
layoutPanel.add(contentPanel_);
HTML right = new HTML();
right.setStylePrimaryName(styles_.tabLayoutRight());
layoutPanel.add(right);
initWidget(layoutPanel);
this.sinkEvents(Event.ONCLICK);
closeHandler_ = closeHandler;
closeElement_ = img.getElement();
}