Artem,
I apologize, I misunderstood that you already got other events working.
I looked through all the events I capture for the mouse, but the only
ones I filter out are
mousedown
mousemove
mouseover
mouseup
I can't seem to find anything I have on the mouse scroll event.
It just doesn't make sense, it should scroll on it's own without you
having to do anything with it.
I found this defined in nsDOMEvent.cpp, I'm not seeing anything on the
mouse scrolling here :-(
static const char* const sEventNames[] = {
"mousedown", "mouseup", "click", "dblclick", "mouseover",
"mouseout", "mousemove", "contextmenu", "keydown", "keyup", "keypress",
"focus", "blur", "load", "beforeunload", "unload", "abort", "error",
"submit", "reset", "change", "select", "input", "paint" ,"text",
"compositionstart", "compositionend", "popupshowing", "popupshown",
"popuphiding", "popuphidden", "close", "command", "broadcast",
"commandupdate",
"dragenter", "dragover", "dragexit", "dragdrop", "draggesture", "resize",
"scroll","overflow", "underflow", "overflowchanged",
"DOMSubtreeModified", "DOMNodeInserted", "DOMNodeRemoved",
"DOMNodeRemovedFromDocument", "DOMNodeInsertedIntoDocument",
"DOMAttrModified", "DOMCharacterDataModified",
"DOMActivate", "DOMFocusIn", "DOMFocusOut",
"pageshow", "pagehide"
I did however come across this case statement in the same file.
case NS_MOUSE_SCROLL_EVENT:
{
nsMouseScrollEvent* mouseScrollEvent =
new nsMouseScrollEvent(PR_FALSE, msg, nsnull);
NS_ENSURE_TRUE(mouseScrollEvent, NS_ERROR_OUT_OF_MEMORY);
isInputEvent = PR_TRUE;
nsMouseScrollEvent* oldMouseScrollEvent =
NS_STATIC_CAST(nsMouseScrollEvent*, mEvent);
mouseScrollEvent->scrollFlags = oldMouseScrollEvent->scrollFlags;
mouseScrollEvent->delta = oldMouseScrollEvent->delta;
newEvent = mouseScrollEvent;
break;
}
I'm not sure if the above even helps you in your quest, hope it does.
Nik Williams
Artem Ananiev wrote:
As I have already said, I had managed to get events working by passing
one instance of my class to all the methods: setContainingWindow,
addWebBrowserListener and addEventListener. I don't know why it is
important, but it works and it is sufficient for now.
I'm then trying to get any scroll (wheel) events and have no idea how
to implement this. For example, 'mouseover' or 'mousemove' events are
dispatched, but 'mousewheel', 'mousescroll', 'DOMMouseScroll' aren't.
What is the right name for mouse wheel events?
Thanks,
Artem
Niky Williams wrote:
Artem
"browser.addWebBrowserListener(new WebBrowserListener(),
nsIWebProgressListener.NS_IWEBPROGRESSLISTENER_IID);
WebBrowserListener class implements nsIWebProgressListener,
nsIWeakReference and nsIInterfaceRequestor interfaces. This doesn't
work either: Java crashes somewhere deep in xul.dll in the call to
addWebBrowserListener(). "
I think that is the start of your problem there. You need that to
work before you can go into getting events from any DOM element because
as far as I know, you can only register for those DOM events when the
document stops loading...you are on the right track.
I noticed that you are passing addWebBrowserListener () a "new
WebBrowserListener ()"? Just a thought but what if you passed it an
nsIWebBrowserChrome interface?
I'll keep my eyes and ears open. Keep passing the questions, maybe
we can come up with something that will work :-)
Nik Williams
I hope Javier has some information on this as to why this is not
working.
Artem Ananiev wrote:
I'm using JavaXPCOM to embed Mozilla-based browser into my Java app.
As I know it is a straightforward wrapper for C++ classes and
functions: all the XPCOM C++ interfaces (abstract classes) are
turned into Java interfaces, and calls to all the Java methods are
automatically converted via JNI into C++ methods and vice versa.
After my previous letter I tried almost the same way as you
suggested, but... For unknown reasons all I wrote failed. First I
tried to register a listener on browser's content DOM window:
nsIDOMWindow dw = browser.getContentDOMWindow();
nsIDOMEventTarget domEventTarget = (nsIDOMEventTarget)
dw.queryInterface(nsIDOMEventTarget.NS_IDOMEVENTTARGET_IID);
domEventTarget.addEventListener("mouseover", new
EventListener(), false);
EventListener class implements nsIDOMEventListener. This doesn't
work, the method handleEvent is not called:( "mousemove", "click"
and many others don't work either.
Then I thought that after a page is loaded in browser its content
window changes, so I need to add an event listener only after the
page is loaded. It is possible with nsIWebProgressListener:
browser.addWebBrowserListener(new WebBrowserListener(),
nsIWebProgressListener.NS_IWEBPROGRESSLISTENER_IID);
WebBrowserListener class implements nsIWebProgressListener,
nsIWeakReference and nsIInterfaceRequestor interfaces. This doesn't
work either: Java crashes somewhere deep in xul.dll in the call to
addWebBrowserListener(). CCing this letter to Javier (the author of
JavaXPCOM library), not sure if he is subscribed to the
dev-embedding alias.
As for documentation... I use XulPlanet web site, Xulrunner/Mozilla
source tree and Eclipse AJAX Tools Framework (it uses JavaXPCOM
also) - not very easy to get a help but better than nothing:)
Thank you for the help,
Artem
Niky Williams wrote:
In reference to making the browser window scroll, I don't have any
issues with that on my C++ app. I did not have to register or
enable anything for that to work..it just..worked. :-( I'm sorry I
can't help you on that one.
However, let me pull some code out here and see if any of it can
help you with events and such.
I'm not real sure how you embed Gecko with Java, but in my class
definition for C++, this is how I have it defined
class CGecko :
public nsSupportsWeakReference,
public nsIWindowCreator,
public nsIWebBrowserChrome,
public nsIEmbeddingSiteWindow,
public nsIWebProgressListener,
public nsIInterfaceRequestor,
public nsIPromptService,
public nsIDOMEventListener
{
...
};
Notice I have quite a bit more things implemented there than what
you have stated in your app...again, I'm not sure how different
Java is from C++ when doing this, but you will need to implement
nsIWebProgressListener and nsIDOMEventListener if you ever want to
receive events such as click, dblclick, load, document start/stop
load, etc...
First thing is that you will need to register for what I call the
web browser events (start/stop load), this is how I do it:
This is done in the initialization of the chrome and browser, etc..
//----------------------------------------------------------------------
//Now trying to setup for events from the web progress
listener if ( (pCOM_wr = do_GetWeakReference
(NS_STATIC_CAST (nsIWebBrowserChrome*, pCg))) == 0 ||
NS_FAILED (pCOM_wb->AddWebBrowserListener (pCOM_wr,
NS_GET_IID (nsIWebProgressListener))))
{
MsgBox (0, "CreateChromeWindow (): Failed to create the web
event listener.", __FILE__, __LINE__);
Shutdown ();
return (S_FALSE);
}
//----------------------------------------------------------------------
I never completely understood the above part, why you needed a weak
reference, but it works LOL. I grab a weak reference (this is why
you see nsSupportsWeakReference listed as one of my base classes,
so I can QI it from my class), then call AddWebBrowserListener ()
from my nsIWebBrowser interface. That should set you up to receive
2 critical events, "Document Start Load" and "Document Stop Load"
Now that you can receive events when the document starts/stops
loading, you can then register for "DOM Events", this is how I do it:
The below method is part of nsIWebProgressListener interface and
where you determine the Document Start/Stop event
NS_IMETHODIMP CGecko::OnStateChange (nsIWebProgress *aWebProgress,
nsIRequest *aRequest, PRUint32 aStateFlags, nsresult aStatus)
{
//Temp vars
nsCOMPtr<nsIWebNavigation> pCOM_wn;
nsCOMPtr<nsIURI> pCOM_u; nsCOMPtr<nsIDOMWindow> pCOM_dw;
nsCOMPtr<nsIDOMEventTarget> pCOM_det;
nsCString csURI;
char *pszURI = 0;
//Getting URI that loaded and making sure we have an object
if (
(pCOM_wn = do_QueryInterface (pwb)) == 0 ||
NS_FAILED (pCOM_wn->GetCurrentURI (getter_AddRefs (pCOM_u))))
{ MsgBox (this, "OnStateChange (): Failed
to retrieve URI.", __FILE__, __LINE__);
return (S_FALSE);
}
//Getting the URI here
pCOM_u->GetSpec (csURI);
//Seeing what is going on with the doucmnet
if (aStateFlags & STATE_IS_DOCUMENT)
{ if (aStateFlags & STATE_START)
{
...
}
if (aStateFlags & STATE_STOP)
{ //Getting DOM Window to get the
event target
aWebProgress->GetDOMWindow (getter_AddRefs (pCOM_dw));
//Getting event target
pCOM_det = do_QueryInterface (pCOM_dw);
//Setting up listeners on the DOM window
//FOR ABORT
//----------------------------
//Unregistering listener first incase it's already
registered for this..Prolly not necessary
pCOM_det->RemoveEventListener (NS_ConvertUTF8toUTF16
("abort"), this, false);
//Registering listener
pCOM_det->AddEventListener (NS_ConvertUTF8toUTF16
("abort"), this, false);
//----------------------------
...
}
}
If you want to setup for other events, you just add another block
of code and use "click", "dblclick", "load", etc...
Then once that is done, you will receive notifications through your
nsIDOMEventListener::HandleEvent () method
To figure out what event is happening, this is how I do it in that
method.
NS_IMETHODIMP CGecko::HandleEvent (nsIDOMEvent *event)
{
//Temp vars
nsString sType; //Getting the type of event that happened
event->GetType (sType); //Going to see what event happened
and pass along the info in a POST command
if (wcsicmp (sType.get (), L"Abort") == 0)
{ ...
}
...
}
Just add more compares here for what events you need to catch and
deal with the events when they come along.
I hope this helps, or at least gives you a start in the direction
you need to head with your Java app. Unfortunately, I have not
been able to find a good tutorial online anywhere, I THINK there
was one posted on the boards no too long ago. I use
http://www.xulplanet.com/ a lot as a reference...no code examples
but a great reference. Also, if you can find it...there is a
plugin for Firefox that is an XPCOM component viewer. It shows you
all the interfaces on your system. Sometimes just browsing through
them can help you find the right interface you need for things.
I've just pieced things together as I have come across them and
documented them as best I could so I knew what they were. If I
didn't have a full time job and a family I'd write up a tutorial
for C++....darn responsibilities LOL. I wish you luck in your
endeavor and feel free to ask any other questions. I'll try to
help you if I can.
Nik Williams
Artem Ananiev wrote:
I noticed these events (nsIDOMxxxEvent) yesterday but had no idea
how I could register my application to listen to them. I have an
instance of nsIWebBrowser and nsIWebBrowserChrome. Using
queryInterface I can get browser chrome's nsIBaseWindow - but none
of these classes has any method like addEventListener() or
something like this.
As for browser scrolling - I don't need to receive scrolling
events (may be need them later), but want the browser to react on
them itself. For example, if I click a link inside a browser, it
follows that page automatically without any actions in my code,
but for scrolling this is not a case. Do I need to listen to
key/mouse events myself and then tell the browser to perform what
I need?
If you can send me some short example it would be fine. Also,
don't you know is there any tutorial about mozilla UI (windows,
widgets, events, etc.) available? All I can find in the web is
descriptions of Mozilla interfaces, not how to use them together:(
Thanks,
Artem
Niky Williams wrote:
Artem Ananiev wrote:
I'm embedding Mozilla-based browser into my Java application
using JavaXPCOM, on Windows. One of the first difficulties I met
is that browser doesn't react on mouse wheel, thoug its
scrollbar is present. My container implements these interfaces:
nsIWebBrowserChrome, nsIWebBrowserChromeFocus,
nsIEmbeddingSiteWindow. What should I do to enable mouse wheel
in embedded browser?
Another question is: is it possible to get mouse and key events
occuring in browser? I don't need them right now but they can be
useful in my app later.
Thanks,
Artem
Artem,
I'm not real familiar with Java, but to receive events in my C++
app, I implement the nsIDOMEventListener interface. You have to
setup the events you want notification from for this to work, but
it's not that hard. If you get to the point you need code
examples, I can provide you some in C++.
If you want to DISPATCH key or mouse events to an element, take a
look at:
nsIDOMDocumentEvent
nsIDOMEvent
nsIEventTarget
nsIDOMKeyEvent
nsIDOMMouseEvent
Again, if you need some code examples, I can provide you with a few.
Hope this helps!
Nik Williams
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