BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Invoking the events when filling in fields using TCppWebBrow          BorlandTalk.com Forum Index -> C++ Builder (Internet Web) View previous topic :: View next topic   Author Message Trevor Keegan Guest Posted: Thu Feb 22, 2007 7:19 am    Post subject: Invoking the events when filling in fields using TCppWebBrow Hi, I am filling in a form on a website that invokes events when the field is changed. When I fill in the form through (say) IHTMLInputTextElement these events are not invoked. What do I need to do to get these events to fire? Regards Trevor Keegan Back to top Eduardo Jauch Guest Posted: Thu Feb 22, 2007 7:33 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Trevor Keegan escreveu: Quote: I am filling in a form on a website that invokes events when the field is changed. When I fill in the form through (say) IHTMLInputTextElement these events are not invoked. What do I need to do to get these events to fire? Take a look at the events. They must be links or Java functions. What you can do is when you fill the form, trigger yourself the events. :) If the event is a link, call the link. If the event is a java script (what is most common), call it like if it was a link: CppWebBrowser->Navigate("javascript:Myfunc()"); Will work :) Only a tip... If this operation will be done many times, maybe you must consider using another component... TCppWebBrowser, being a wraper for the ActiveX of IE is horrible... ;) But will work for many applications Back to top Trevor Keegan Guest Posted: Thu Feb 22, 2007 7:48 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Hi Eduardo, Thanks for your reply The problem is I have stuff like this: class=text id="F00043" value="TKEEGAN (AT) EALINK (DOT) COM"onChange="javascript:this.value=this.value.toUpperCase();" OnBlur="return checkEmail(this)" While this is a fairly simple thing to handle, I am just worried that the authors will at some point in time change/add stuff to the script...this will then mean that I have to be aware of these changes. I though that it would be better if there was some way to force the execution of these events. Regards Trevor Keegan Back to top Remy Lebeau (TeamB) Guest Posted: Thu Feb 22, 2007 8:03 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb "Trevor Keegan" <tkeegan (AT) ealink (DOT) com> wrote in message news:45dcef87$1 (AT) newsgroups (DOT) borland.com... Quote: What do I need to do to get these events to fire? Fire them manually. The browser's DOM interfaces provide access to them. Events are normally accessed via the IDispatch interface. So, for example, to fire the onblur event, you would call IHTMLElement2::get_onblur(), which returns a VARIANT containing an IDispatch interface. You would then call the IDispatch::Invoke() method, specifying DISPID_VALUE as the ID to execute. Alternatively, use the IHTMLElement3::fireEvent() method instead, which does the above work for you. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Thu Feb 22, 2007 8:03 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb "Trevor Keegan" <tkeegan (AT) ealink (DOT) com> wrote in message news:45dcf664 (AT) newsgroups (DOT) borland.com... Quote: I though that it would be better if there was some way to force the execution of these events. There is. See my other reply. Gambit Back to top Eduardo Jauch Guest Posted: Thu Feb 22, 2007 8:41 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Always learning something new Good to know Back to top Remy Lebeau (TeamB) Guest Posted: Thu Feb 22, 2007 9:10 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb "Trevor Keegan" <tkeegan (AT) ealink (DOT) com> wrote in message news:45dd392b (AT) newsgroups (DOT) borland.com... Quote: I did see the Invoke method there, but it looked as though I needed to send in a whole bunch of parameters. So I thought there might be another way Invoke() is a very flexible method. Just because it has room to accept parameters does not mean that you have to use them. In fact, DISPID_VALUE is a default method, so it does not accept any input parameters. You would fill in the DISPPARAMS structure with empty data. There is an example in IDispatch's documentation of calling a method with no parameters. Quote: I like the sound of this....but please help me, how do I get to the IHTMLElement3.... The same way you get any interface from another - via the QueryInterface() method. Quote: I current have this: snip Should I add something like IHTMLElement3::fireEvent( "OnBlur", TextInput ) ? Please read the documentation for fireEvent(): http://msdn.microsoft.com/workshop/browser/mshtml/reference/ifaces/element3/fireevent.asp Gambit Back to top Trevor Keegan Guest Posted: Thu Feb 22, 2007 9:10 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Hello Remy, I did see the Invoke method there, but it looked as though I needed to send in a whole bunch of parameters. So I thought there might be another way :) Quote: Alternatively, use the IHTMLElement3::fireEvent() method instead, which does the above work for you. I like the sound of this....but please help me, how do I get to the IHTMLElement3....I current have this: TComInterface<IHTMLInputTextElement> TextInput; Disp->QueryInterface( IID_IHTMLInputTextElement, (LPVOID*)&TextInput ); if( TextInput ) { //Set the value in the field TextInput->put_value( WideString( Value ) ); } Should I add something like IHTMLElement3::fireEvent( "OnBlur", TextInput ) ? Regards Trevor Keegan Back to top Trevor Keegan Guest Posted: Fri Feb 23, 2007 9:10 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Hello Remy, Thanks for your help :-) I am sure that there is something fundamental that I am missing here. When I try to compile the code: TComInterface<IHTMLElement3> Element; The comiler complains basically telling me that it does not know what an IHTMLElement3 is. I have found other types (e.g. IHTMLTextElement) in th comdef.h header file...but not the IHTMLElement3. I am using Builder 6, is there something that I need to do that I am not doing? Regards Trevor Keegan Back to top Remy Lebeau (TeamB) Guest Posted: Fri Feb 23, 2007 9:10 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb "Trevor Keegan" <tkeegan (AT) ealink (DOT) com> wrote in message news:45de9306 (AT) newsgroups (DOT) borland.com... Quote: When I try to compile the code: TComInterface<IHTMLElement3> Element; The comiler complains basically telling me that it does not know what an IHTMLElement3 is. IHTMLElement3 is not defined in the SDK headers that ship with BCB 6. You will have to declare the interface manually in your own code. Alternatively, import mshtml.tlb into the IDE and have it generate MSHTML_TLB.cpp and MSHTML_TLB.h files that you can use. Gambit Back to top Trevor Keegan Guest Posted: Fri Feb 23, 2007 3:58 pm    Post subject: Re: Invoking the events when filling in fields using TCppWeb Hello Remy OK....I have imported the library using: tlibimp -Hs- -Hr- -Fe- \windows\system32\mshtml.tlb......And I can see that it has created the IHTMLElement3 interface for me :) The problem that I have now is that code that was compiling ok....now does not compile....in particular the compiler now complains that the put_value is not a member of the IHTMLInputTextElement......but it is according to http://msdn.microsoft.com/workshop/browser/mshtml/reference/ifaces/inputtextelement/inputtextelement.asp TComInterface<IHTMLInputTextElement> TextInput; Disp->QueryInterface( IID_IHTMLInputTextElement, (LPVOID*)&TextInput ); if( TextInput ) { //Set the value in the field TextInput->put_value( WideString( Value ) ); } The problem appears to be now that I have 2 mshtml.h files. The original one and the new one, is this correct? Regards Trevor Keegan Back to top Remy Lebeau (TeamB) Guest Posted: Sat Feb 24, 2007 12:35 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb "Trevor Keegan" <tkeegan (AT) ealink (DOT) com> wrote in message news:45debab4 (AT) newsgroups (DOT) borland.com... Quote: The problem that I have now is that code that was compiling ok.... now does not compile....in particular the compiler now complains that the put_value is not a member of the IHTMLInputTextElement...... Look at the declaration of the IHTMLInputTextElement interface in the headers. What do you actually see? Gambit Back to top Trevor Keegan Guest Posted: Sun Feb 25, 2007 8:53 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Hello Remy, Quote: The problem that I have now is that code that was compiling ok.... now does not compile....in particular the compiler now complains that the put_value is not a member of the IHTMLInputTextElement...... Look at the declaration of the IHTMLInputTextElement interface in the headers. What do you actually see? I have taken a look and now see what the problem is.....it appears as though all the put methods (e.g. put_value) have now been changed to set methods (i.e. set_value). I recently upgraded to IE 7, I guess that this must been the cause of this. Regards Trevor Keegan Back to top Remy Lebeau (TeamB) Guest Posted: Sun Feb 25, 2007 9:10 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb "Trevor Keegan" <tkeegan (AT) ealink (DOT) com> wrote in message news:45e0fa15 (AT) newsgroups (DOT) borland.com... Quote: I have taken a look and now see what the problem is.....it appears as though all the put methods (e.g. put_value) have now been changed to set methods (i.e. set_value). I recently upgraded to IE 7, I guess that this must been the cause of this. No. Interface methods are not changed once exposed. That is a core rule of COM programming in order to ensure backwards compatibility when releasing new versions of a library. Are you sure that you are actually accessing the interface directly, and not the VCL wrapper that the IDE generated for you? Gambit Back to top Trevor Keegan Guest Posted: Mon Feb 26, 2007 9:10 am    Post subject: Re: Invoking the events when filling in fields using TCppWeb Hello Remy, Quote: No. Interface methods are not changed once exposed. That is a core rule of COM programming in order to ensure backwards compatibility when releasing new versions of a library. Are you sure that you are actually accessing the interface directly, and not the VCL wrapper that the IDE generated for you? Umm, now that you mention it I had assumed that the correct files would be generated would be given the correct thing.....I assume for a start that I am importing it the correct way (so it might be that I am not using the correct method). I notice that the original mshtml.h (in the Cbuilder6\include directory) was only about 1.5Mb in size......the newly generated one is a massive 19.4mb in size. There were 2 header files generated.....a MSHTML.H file (19.4mb) and a MSHTML_OCX.H file (only 6kb) in size. 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