I think that's part of it, Fabiano, and I think the other part is
reconciling what 'this' means between the JavaScript event handler function
and the GWT TextBox. I've got it working like this (still using
StockWatcher as a test-bed -- note that this the Window.confirm here is for
testing; my actual app does something different):
public class StockWatcher implements EntryPoint {
private static Map<Element, TextBox> m_elementToWidget =
newHashMap<Element, TextBox>();
...
At the end of onModuleLoad():
registerOnCut(nameField.getElement());
m_elementToWidget.put(nameField.getElement(), nameField);
...
Changed the event handler functions to be static, then reconcile the Element
back to the corresponding Widget:
public native void registerOnCut(Element element)
/*-{
element.oncut = function(e)
{
if (!e) var e = window.event;
$entry(
@com.google.gwt.sample.stockwatcher.client.StockWatcher::doCut
(Lcom/google/gwt/dom/client/NativeEvent;)(e));
return false;
};
}-*/;
public static void doCut(NativeEvent event)
{
EventTarget target = event.getEventTarget();
if (Element.is(target))
{
Element element = Element.as(target);
TextBox textbox = m_elementToWidget.get(element);
String text = textbox.getText();
int cursorPos = textbox.getCursorPos();
int selectionLength = textbox.getSelectionLength();
String selectedText = textbox.getSelectedText();
String msg = "OK to cut selected text '"+selectedText+"' @ "
+cursorPos+","+selectionLength+"?";
if (Window.confirm(msg))
{
text = text.substring(0, cursorPos) +
text.substring(cursorPos+selectionLength);
textbox.setText(text);
}
}
}
And for cleanup, I added this to the subclassed TextBox:
@Override
protected void onDetach()
{
super.onDetach();
m_elementToWidget.remove(getElement());
}
On Mon, Feb 15, 2010 at 12:29 AM, Fabiano <[email protected]> wrote:
> On 14 Feb, 23:19, Jim Douglas <[email protected]> wrote:
>
> > $entry([email protected]
> ::doCut());
> Hi,
> I'm a bit nood but I have the impression that the problem could be
> related to the function argument, my proposal, not tested:
>
> $entry([email protected]
> ::doCut(D));
>
> I don't know the reason but I have found this example
>
> http://googlewebtoolkit.blogspot.com/2008/07/getting-to-really-know-gwt-part-1-jsni.html
> about functions with empty arguments:
>
> // Set up the JS-callable signature as a global JS function.
> private native void publish() /*-{
> $wnd.formatAsCurrency =
>
> @org.example.yourcode.format.client.DateFormatterLib::formatAsCurrency(D);
> }-*/;
>
> it lacks $entry , but I don't think this is an issue.
> I have the impression that sometimes gwt documentation in a bit
> ambiguous about syntax and left too much to the user intuition.
> In the main documentation there is no an example about functions with
> no arguments.
> Regards
>
>
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