how to add routines for class derived from CHtmlView to response Event when you click a button showed on a webpage

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I have a Class CSimpleHtmlView derived from CHtmlView, when I launch the application, i make it navigate a local html file which has a button on it.I want to Deal with the button-click event.

the script that define the button is like this:

HTML

<div style="font-family:Tahoma;font-size:12px;float:left;"><input onclick="window.external.OnBackward();" type="button" id="backward"  value="backward" /></div>

then I add the macro DECLARE_DISPATCH_MAP() in the CTestHtmlview's header file and a function to deal with the event. eg. void OnBackward();

In the implementing file, I add some other Macro as below:

C++

BEGIN_DISPATCH_MAP(CSimpleHtmlView, CHtmlView)
	DISP_FUNCTION(CSimpleHtmlView, "OnBackward",  OnBackward,  NULL, NULL)
END_DISPATCH_MAP()

and implement the function. the application can't stop at the breakpoint in that function when i debug the application; Is there anything else should be added in the code? what can i do then?
thank you!

Posted 28-Jun-12 17:52pm

wmoumou

Updated 28-Jun-12 21:42pm

v6

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barneyman 29-Jun-12 1:24am

is your OnBackward method being called?

I don't understand 'can't break into it'

wmoumou 29-Jun-12 3:41am

I mean that the application can't stop at the breakpoint in that function, In other words the function isn't called.

barneyman 29-Jun-12 3:55am

ok

2 solutions

Solution 1

Qualifier here - I have no experience with CHtmlView, I use the browser through WTL[^] - in that architecture it's necessary to call SetExternalDispatch[^] to glue the browser events into the window

I found this thread that talks about MFC being broken[^] - it does point to an alternative

Posted 28-Jun-12 22:09pm

barneyman

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wmoumou · Accepted Answer · 2012-07-01T19:32:00

thank you, barneyman!

I have found a resolution. the cusory step is following:
1. establish a new project based dialog, checking the "automation" option.
2. add a new class derived from CHtmlView, checking the "automation" option too.
3. add a new method for the interface(the wizard will create for you when checking the automation). eg.void myfunction1(void);
4.override the "OnGetExternal" virtual function of your derived class, fill the function body with following code

C#

*lppDispatch = GetIDispatch(TRUE);
    return S_OK;

then, you can fire the function in html, just like this:
window.external.myfunction();

my os is win7 ultimate, and the IDE is VS2008!