huazilin wrote:
I happened a difficult question.I have created a xpcom with the vc.The
xpcom must fire an event to notify some status has been changed .Then
the webpage can make some decisionBut how to fire an event ,just like
activex have a fireevent mechanism.
Can some one help me ?
Thank you very much!
What type of event are you talking about? DM Events to a web page?
PL_Events? Please give some example of what you're trying to do.
/ Jonas
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Jonas Sicking

What type of event are you talking about? DM Events to a web page?
PL_Events? Please give some example of what you're trying to do.

/ Jonas

First, Thanks your reply!
Not DM Events.In the C++ XPCom ,I have defined some status,just
like something has begined ,the status is 1,something is busy,then the
status is 2,.When the status has changed,I want to notify the
HTML or let javascript code check the changes immediately,then the
webpage can make some changes along with it.
What should I do,and how?Can you give me some example? Thank you
very much!

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Not DM Events.In the C++ XPCom ,I have defined some status,just
like something has begined ,the status is 1,something is busy,then the
status is 2,.When the status has changed,I want to notify the
HTML or let javascript code check the changes immediately,then the
webpage can make some changes along with it.

If you want to notify a web page that something has change then it
sounds like DM events is what you want to use. The issue is just how to
get hold of the web page that you want to notify of the change. do
you want to notify all pages that the user currently has open?

How are you using xpcom? Are you embedding gecko in your product, or are
you writing some sort of extension to firefox?

/ Jonas

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But, Can I define event by myself? How to define?All the DM event
types which I have known don't meet my request.
And I also don't know how to fire an user defined event in the c++
xpcom.

The xpcom I have implemented is a webcall component ,which now can
work,it can make call to somebody.But If the other side is busy now ,
then I need to konw.My xpcom can receive the message the other side is
busy . But How do I notify to the web page which used the xpcom?

In other words , I write a plugin for the firefox.

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huazilin wrote:
But, Can I define event by myself? How to define?All the DM event
types which I have known don't meet my request.
And I also don't know how to fire an user defined event in the c++
xpcom.

You can define your own events easily. Just do something like
evt = document.createEvent("Event");
evt.initEvent("serviceFailed", true, true);
document.dispatchEvent(evt);

(the above is written in javascript, but the exact same methods are
available in C++).

/ Jonas

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Jonas Sicking wrote:
You can define your own events easily. Just do something like
You could even define your own event class. For example, XMLHttpRequest
does that:
#2028
or
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Maybe My English is so poor ,then I havn't express clearly!
If you have write some xpcom based gecko-sdk in c++, and you can send
me a demo implemented the event mechanism,I am appreciate you very
much.I have spended so much time on this thing.

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Thank you for your kindness.But your advice can't help ,May be I can't
understand what you say.

I have write a xpcom,but the xpcom is based on the win32 api and C
All the thing havn't been down in the bottom model.Now I want to use
the xpcom in the firefox.Now the xpcom can work,but I can't let my
xpcom fire the event.That means I don't have event mechanism.

The test code is following:(js)

var cookie_value=0;
var statuschanged=false;

function change()
{

("UniversalXPConnect");
();
if(statuschanged)
{
();
alert(cookie_value);

}

}

function DoInit() {
try {

("UniversalXPConnect");
const cid = "@contactID;1";

SipWebCall = Components.classes[cid].createInstance();

SipWebCall =
SipWebCall.QueryInterface();

} catch (err) {
alert(err);
return;
}
SipWebCall.SetProxyServer('admin.com');
SipWebCall.SetUserId('num','password');
window.setInterval(change,1000);

}
function MyComponentTestGo()
{

("UniversalXPConnect");

SipWebCall.MakeCallTo('num','licence');

}

function HandUp()
{

("UniversalXPConnect");

SipWebCall.DropCall();
}

//Note: When my xpcom register , makecallto or dropcall,all the actions
with return some status.
//That means the "cookie_value" is changed when something has happened.
//Now I check the status one time per 1s,What I want to do is when the
status is changed .It can notify me but not let me to check it.

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huazilin wrote:
But, Can I define event by myself? How to define?All the DM event
types which I have known don't meet my request.
And I also don't know how to fire an user defined event in the c++
xpcom.

Since your webpage seemingly has XPConnect privileges, maybe it can
register itself as an observer via nsIService, then you can use
it to broadcast various topics.

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