I would like to get the "DOMContentLoaded" event from C++. It works
from javascript, but not from C++. However it seems I more or less
have the correct event target since "resize" and "unload" event does
work.

My XulFile is very simple where the interesting part is this line
declaring the browser:
<browser id="mybrowser1"  src="http://www.google.dk" flex="1" />

The C++ code is like this:
void CSpecialThing::getBrowserQuestionForForum()
{
    nsString wsHrefXul      = NS_LITERAL_STRING( "chrome://xulcrawler/
content/main.xul" );
    nsString wsIDBrowser    = NS_LITERAL_STRING( "mybrowser1" );

    // --- A lot of variables ---
    nsresult rv;
    nsCOMPtr<nsIDOMWindowInternal>      pWinInt(0);
    nsCOMPtr<nsISimpleEnumerator>       pWinEnumerator;
    nsCOMPtr<nsIDOMLocation>            pDOMLocation;
    nsCOMPtr<nsIDOMWindowCollection>    pDOMWindowCollection;
    nsCOMPtr<nsIDOMWindow>              pDomWin;

    // -----------------------------
    // --- Get DomWindowInternal ---
    // -----------------------------

    nsCOMPtr<nsIWindowMediator>
pWindowMediator(do_GetService(NS_WINDOWMEDIATOR_CONTRACTID));

    nsString sWindowType( NS_LITERAL_STRING("") );
    rv = pWindowMediator->GetEnumerator( sWindowType.get(),
getter_AddRefs(pWinEnumerator));

    PRBool bHasMoreElements;
    rv = pWinEnumerator->HasMoreElements( &bHasMoreElements );

    while ( bHasMoreElements ) {
        nsCOMPtr<nsISupports> pSupportsWin;
        rv = pWinEnumerator->GetNext( getter_AddRefs(pSupportsWin) );
        nsCOMPtr<nsIDOMWindowInternal>
pWinInternal(do_QueryInterface(pSupportsWin));

        rv = pWinInternal-

        nsString wsHrefTest;
        rv = pDOMLocation->GetHref( wsHrefTest );

        // See if we have the correct (XUL) URI
        if ( wsHrefXul == wsHrefTest  ) pWinInt = pWinInternal;

        rv = pWinEnumerator->HasMoreElements( &bHasMoreElements );
    }

    // --- Get the "mybrowser1" element ---
    pWinInt->GetFrames( getter_AddRefs(pDOMWindowCollection) );
    pDOMWindowCollection->NamedItem( wsIDBrowser,
getter_AddRefs(pDomWin) );

    // --- Add events ---
    nsCOMPtr<nsIDOMEventTarget>
pDomEventTarget(do_QueryInterface(pDomWin));
    pDomEventTarget-

PR_FALSE);
    pDomEventTarget->AddEventListener(NS_LITERAL_STRING("resize"),
this, PR_FALSE);
    pDomEventTarget->AddEventListener(NS_LITERAL_STRING("unload"),
this, PR_FALSE);

Chances are you did attach the event handler to the window, but
unfortunately loading a new document clears all extant event handlers.
In JavaScript you've probably been attaching a capturing event handler
to the browser element instead.

--
Warning: May contain traces of nuts.

On 16 Maj, 10:46, Neil <n...@parkwaycc.co.uk> wrote:

Ok. Any idea how I get the browser element ?

Is it one of those I already have interfaces to? Anyway I found the
code in the source for Songbird, but they do not listen to the
"DOMContentLoaded" so you're probably right that I am attaching event
listneners to the wrong element.

Thanks a lot

(Using abbreviated variable names to save space)

nsCOMPtr<nsIDOMDocument> doc;
win->GetDocument(getter_AddRefs(doc));
nsCOMPtr<nsIDOMElement> elt;
doc->GetElementById(NS_LITERAL_STRING("browser1"), getter_AddRefs(elt));
nsCOMPtr<nsIDOMEventTarget> tgt(do_QueryInterface(elt);
tgt->AddEventListener(NS_LITERAL_STRING("DOMContentLoaded"), this, PR_TRUE);

--
Warning: May contain traces of nuts.

Hi Neil

I'll try your way too. Again Thanks a lot :)
Also found a way myself which seems to work:

I found the solution. Just need to get the Parent windows of the one I
wa using. Except if you want the "unload" event which seems to only
work for the window I was first using. Here goes the complete updated
code for those who might have had the same troubles as I.
Thanks again to Neil for his great help.

void CSpecialThing::getBrowserQuestionForForum()
{
    nsString wsHrefXul      = NS_LITERAL_STRING( "chrome://xulcrawler/
content/main.xul" );
    nsString wsIDBrowser    = NS_LITERAL_STRING( "mybrowser1" );

    // --- A lot of variables ---
    nsresult rv;
    nsCOMPtr<nsIDOMWindowInternal>      pWinInt(0);
    nsCOMPtr<nsISimpleEnumerator>       pWinEnumerator;
    nsCOMPtr<nsIDOMLocation>            pDOMLocation;
    nsCOMPtr<nsIDOMWindowCollection>    pDOMWindowCollection;
    nsCOMPtr<nsIDOMWindow>              pDomWin;
    nsCOMPtr<nsIDOMWindow>              pDomWinBrowser;
    nsCOMPtr<nsIDOMDocument>            pDomDoc;

    // -----------------------------
    // --- Get DomWindowInternal ---
    // -----------------------------

    nsCOMPtr<nsIWindowMediator>
pWindowMediator(do_GetService(NS_WINDOWMEDIATOR_CONTRACTID));

    nsString sWindowType( NS_LITERAL_STRING("") );
    rv = pWindowMediator->GetEnumerator( sWindowType.get(),
getter_AddRefs(pWinEnumerator));

    PRBool bHasMoreElements;
    rv = pWinEnumerator->HasMoreElements( &bHasMoreElements );

    while ( bHasMoreElements ) {
        nsCOMPtr<nsISupports> pSupportsWin;
        rv = pWinEnumerator->GetNext( getter_AddRefs(pSupportsWin) );
        nsCOMPtr<nsIDOMWindowInternal>
pWinInternal(do_QueryInterface(pSupportsWin));

        rv = pWinInternal-

        nsString wsHrefTest;
        rv = pDOMLocation->GetHref( wsHrefTest );

        // See if we have the correct (XUL) URI
        if ( wsHrefXul == wsHrefTest  ) pWinInt = pWinInternal;

        rv = pWinEnumerator->HasMoreElements( &bHasMoreElements );
    }

    // --- Get the "mybrowser1" element ---
    pWinInt->GetFrames( getter_AddRefs(pDOMWindowCollection) );
    pDOMWindowCollection->NamedItem( wsIDBrowser,
getter_AddRefs(pDomWin) );

    pDomWin->GetParent( getter_AddRefs(pDomWinBrowser) );

    // --- Add events ---
    nsCOMPtr<nsIDOMEventTarget>
pDomEventTargetBrowserWin(do_QueryInterface(pDomWin));
    nsCOMPtr<nsIDOMEventTarget>
pDomEventTargetBrowser(do_QueryInterface(pDomWinBrowser));
    pDomEventTargetBrowser-

PR_FALSE);
    pDomEventTargetBrowser-
    pDomEventTargetBrowserWin-

    // ---------------------------------------------------------------
    // --- Bonus example on how to get the current URI of the page ---
    // ---------------------------------------------------------------
    pDomWin->GetDocument( getter_AddRefs(pDomDoc) );
    nsCOMPtr<nsIDOMDocumentView>
pDomDocumentView(do_QueryInterface(pDomDoc));
    nsCOMPtr<nsIDOMAbstractView> domAbstractView =
getDefaultView(pDomDocumentView);
    nsCOMPtr<nsIWebNavigation>
webNavigation(do_GetInterface(domAbstractView));
    printf("webNavigation uri: %s\n",
getCurrentURI(webNavigation).c_str() );

Hi Neil

I'll try your way too. Again Thanks a lot :)
Also found a way myself which seems to work:

I found the solution. Just need to get the Parent windows of the one I
wa using. Except if you want the "unload" event which seems to only
work for the window I was first using. Here goes the complete updated
code for those who might have had the same troubles as I.
Thanks again to Neil for his great help.

void CSpecialThing::getBrowserQuestionForForum()
{
    nsString wsHrefXul      = NS_LITERAL_STRING( "chrome://xulcrawler/
content/main.xul" );
    nsString wsIDBrowser    = NS_LITERAL_STRING( "mybrowser1" );

    // --- A lot of variables ---
    nsresult rv;
    nsCOMPtr<nsIDOMWindowInternal>      pWinInt(0);
    nsCOMPtr<nsISimpleEnumerator>       pWinEnumerator;
    nsCOMPtr<nsIDOMLocation>            pDOMLocation;
    nsCOMPtr<nsIDOMWindowCollection>    pDOMWindowCollection;
    nsCOMPtr<nsIDOMWindow>              pDomWin;
    nsCOMPtr<nsIDOMWindow>              pDomWinBrowser;
    nsCOMPtr<nsIDOMDocument>            pDomDoc;

    // -----------------------------
    // --- Get DomWindowInternal ---
    // -----------------------------

    nsCOMPtr<nsIWindowMediator>
pWindowMediator(do_GetService(NS_WINDOWMEDIATOR_CONTRACTID));

    nsString sWindowType( NS_LITERAL_STRING("") );
    rv = pWindowMediator->GetEnumerator( sWindowType.get(),
getter_AddRefs(pWinEnumerator));

    PRBool bHasMoreElements;
    rv = pWinEnumerator->HasMoreElements( &bHasMoreElements );

    while ( bHasMoreElements ) {
        nsCOMPtr<nsISupports> pSupportsWin;
        rv = pWinEnumerator->GetNext( getter_AddRefs(pSupportsWin) );
        nsCOMPtr<nsIDOMWindowInternal>
pWinInternal(do_QueryInterface(pSupportsWin));

        rv = pWinInternal-

        nsString wsHrefTest;
        rv = pDOMLocation->GetHref( wsHrefTest );

        // See if we have the correct (XUL) URI
        if ( wsHrefXul == wsHrefTest  ) pWinInt = pWinInternal;

        rv = pWinEnumerator->HasMoreElements( &bHasMoreElements );
    }

    // --- Get the "mybrowser1" element ---
    pWinInt->GetFrames( getter_AddRefs(pDOMWindowCollection) );
    pDOMWindowCollection->NamedItem( wsIDBrowser,
getter_AddRefs(pDomWin) );

    pDomWin->GetParent( getter_AddRefs(pDomWinBrowser) );

    // --- Add events ---
    nsCOMPtr<nsIDOMEventTarget>
pDomEventTargetBrowserWin(do_QueryInterface(pDomWin));
    nsCOMPtr<nsIDOMEventTarget>
pDomEventTargetBrowser(do_QueryInterface(pDomWinBrowser));
    pDomEventTargetBrowser-

PR_FALSE);
    pDomEventTargetBrowser-
    pDomEventTargetBrowserWin-

    // ---------------------------------------------------------------
    // --- Bonus example on how to get the current URI of the page ---
    // ---------------------------------------------------------------
    pDomWin->GetDocument( getter_AddRefs(pDomDoc) );
    nsCOMPtr<nsIDOMDocumentView>
pDomDocumentView(do_QueryInterface(pDomDoc));
    nsCOMPtr<nsIDOMAbstractView> domAbstractView =
getDefaultView(pDomDocumentView);
    nsCOMPtr<nsIWebNavigation>
webNavigation(do_GetInterface(domAbstractView));
    printf("webNavigation uri: %s\n",
getCurrentURI(webNavigation).c_str() );

вторник, 17 мая 2011 г., 19:44:25 UTC+4 пользователь Martin  Lutken написал:

Hi, Martin.
A question for nubie. What function will be fired on event. The second parameter for "AddEventListener" is "this". It is the pointer to class, not function.

The second parameter is an nsIDOMEventListener type. This has a method
called handleEvent (or HandleEvent in C++).

XPConnect magic allows script to pass a function instead of a class.

--
Warning: May contain traces of nuts.

понедельник, 1 октября 2012 г., 19:47:03 UTC+4 пользователь Neil написал:

Thank you Neil,
now i understand.
I implemented nsIDOMEventListener class and can catch events.
Thanks again!

четверг, 4 октября 2012 г., 13:35:33 UTC+4 пользователь YuLo написал:

But my problem is not solved yet.
I can catch keyboard event but where can i get KeyCode?
The event variable of HandleEvent() is of type nsIDOMEvent.
Casting it to nsIDOMKeyEvent and using GetKeyCode() crashes XULRunner.

суббота, 6 октября 2012 г., 16:08:51 UTC+4 пользователь YuLo написал:

sorry, do_QueryInterface solved the problem.