Capture a keyboard event on af:panelGridLayout?

Question

Hi,
<af:panelGridLayout> currently supports a client listener with mouse events.
But I have a requirement where I need to capture keyboard events.
I tried adding an invisible inputText component on the page and focus on it onclick of the panel.
My assumption was that when the inputText is on focus, it should be able to capture keyboard events even though its invisible.
This does not work. Please see code below. The "showAlert" javascript method never gets called.
<af:inputText clientComponent="true" visible="false" value="dummy" id="keyLink">
     <af:clientListener method="showAlert" type="keyUp"/>
</af:inputText>
<af:panelGridLayout id="pgl3">
    <af:clientListener method="toggleRowSelection" type="click"/>
</af:panelGridLayout>Javascript code:
function showAlert(event) {
    alert("javascript event " + event.getKeyCode());
function toggleRowSelection(event) {
    var source = event.getSource();
    var keyLink = source.findComponent("::keyLink");
    keyLink.focus();
    callServerMethod(event);
};How do I achieve this?
-Anitha

Answer 1

"[email protected]" <[email protected]> wrote in message news:[email protected]..
I have figured out how to add menu Item to an existing EXE program, but I have not yet been able to figure out how to capture there events.&nbsp; Any help would be greatly appreciated.
It's not entirely clear what you are trying to acieve. I think you're trying to add menu items to an exsisting exe without recompiling it, from LabVIEW. If so the following applies.
You have to hook the winproc. When a menu item is selected, windows send a message to the window's winproc. There are some API's that can be used to point the address of the winproc to another routine. This routine can do filtering, and then call the original routine.
Note that LabVIEW doesn't (or didn't until LV7) use windows menu's, so when a LabVIEW (or exe created with LabVIEW) menu item is called, windows will not send anything. That is the price for platform independency.
I think the OpenG site (or perhaps Winutils from NI) has some vi's to hook windows messages that are send to LabVIEW. Perhaps you can also use them hook another application.
Regards,
Wiebe.