C / C++ / MFC

15-Oct-11 7:30

I have a dialog form, where I have an listctrl. On listcontrol set focus handler, I need to send a click message, like I would click on listcontrol. I try in follow way, but didn't work it

C++

void CMyPage::OnSetfocusListFeature(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here

	NMHDR nmh;
	nmh.code = NM_CLICK;
	nmh.idFrom = m_ListFeature.GetDlgCtrlID();
	nmh.hwndFrom = m_hWnd;
	SendMessage(WM_NOTIFY,0,(LPARAM)&nmh);

	*pResult = 0;
}

... can you tell me hat i'm doing wrong ?

MartyTPS15-Oct-11 16:25

MartyTPS

15-Oct-11 16:25

nmh.hwndFrom = m_hWnd;

is your problem. it should be the hwnd of of the window of the CONTROL you want to send the message to.

WM_NOTIFY uses the id or the hwnd. if you pass the hwnd, it uses it. So you are sending the WM_NOTIFY to the dialog, not the list child of the dialog.

_Flaviu15-Oct-11 22:01

15-Oct-11 22:01

Thank you, I will try and let you know what I've done.

_Flaviu16-Oct-11 19:56

16-Oct-11 19:56

Now goes. Thanks.

modified 19-Oct-11 3:03am.

«_Superman_»15-Oct-11 21:08

«_Superman_»

15-Oct-11 21:08

If you're trying to select a particular item from the list you can do this-

m_ListFeature.SetItemState(0, LVIS_SELECTED, LVIS_SELECTED);

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

_Flaviu15-Oct-11 22:00

15-Oct-11 22:00

No, I don't want to select an specific item, just to make a virtual click on listcontrol.

Stephen Hewitt16-Oct-11 2:36

Stephen Hewitt

16-Oct-11 2:36

Why? Since clicking has the effect of selecting an item selecting it as Superman suggested is superior.

Steve

_Flaviu16-Oct-11 19:56

setting form element values using ie TCppWebBrowser control

16-Oct-11 19:56

I open an custom control on listcontrol and this custom control is hidden on clicked anywhere on list ... that's why I need click message and not select an specific item.

Andrew J. Burke15-Oct-11 3:32

Re: setting form element values using ie TCppWebBrowser control

15-Oct-11 3:32

This is what I've come up with so far but need to find & add values to the form elements for user input and password input, then submit. I'm using C++Builder6.

#include <mshtml.h>

//
TComInterface<IHTMLDocument2>HTMLDoc;
Browser->Document->QueryInterface(IID_IHTMLDocument2,(LPVOID*)&HTMLDoc);

//get all the forms
TComInterface<IHTMLElementCollection>HTMLforms;
HTMLDoc->get_forms(&HTMLforms);

//Get form 0 since login pages have only one form
TComInterface<IHTMLFormElement>HTMLform;

//Get User,Password fields & set values
TComInterface<IHTMLElement>HTMLfield;

//Then submit form
HTMLform->submit();

Thanks!

App_15-Oct-11 8:37

App_

15-Oct-11 8:37

I hope this Boland C++ Builder 6 code might work..

#include utilcls.h
#include Mshtml.h

template<class ParentIntf, class ItemIntf>
HRESULT __fastcall GetHTMLItem(ParentIntf *CollectionOrElement, const
WideString &name, ItemIntf** ppIntf)
{
	TVariant vName = name;
	TVariant vIndex = 0;
	TComInterface disp;

	HRESULT hRes = CollectionOrElement->item(vName, vIndex, &disp);
	if( SUCCEEDED(hRes) )
	hRes = disp->QueryInterface(__uuidof(ItemIntf),(LPVOID*)ppIntf);
	return hRes;
}

void __fastcall TForm1::CppWebBrowser1DocumentComplete (TObject*
Sender, LPDISPATCH pDisp, TVariant *URL)
{
	if( CppWebBrowser->Document )
	{
		TComInterface HTMLDoc;
		if(SUCCEEDED(CppWebBrowser->Document->QueryInterface(
		IID_IHTMLDocument2,(LPVOID*)&HTMLDoc) ) )
		{
			TComInterface forms;
			if( SUCCEEDED(HTMLDoc->get_forms(&forms)) )  
			{
				TComInterface form;
				if( SUCCEEDED(GetHTMLItem(forms, "loginform", &form)) )
				{
				TComInterface userid;
				TComInterface password;

				GetHTMLItem(form, "userid", &userid);
				GetHTMLItem(form, "password", &password);

				if( userid )
				userid->put_value(WideString("username"));

				if( password )
				password->put_value(WideString("password"));
				}
			}
		}
	}
}

I hope this Boland C++ Builder 6 code might work too..

bool TForm1::Login(char* inputname, const AnsiString& text)
{
 bool done = false;
 
 IHTMLDocument2* HTMLDoc = NULL;
 
 if(SUCCEEDED(CppWebBrowser1->Document->QueryInterface(IID_IHTMLDocument2,  (LPVOID*)&HTMLDoc)))
{
 IHTMLElementCollection* pAll = NULL;
 if(SUCCEEDED(HTMLDoc->get_all(&pAll)))
 {
   // <input type="text" name="the_tag">
 
   Variant name = inputname;
   Variant index = 0;
 
   IDispatch* pDisp = NULL;
 
   if(SUCCEEDED(pAll->item(name, index, &pDisp)))
   {
    if ( pDisp )
    {
      // IHTMLInputFileElement* pInput = NULL;     // mshtml.h
     IHTMLInputElement* pInput = NULL;     // mshtml.h
      // IHTMLFormElement* pForm = NULL;         // mshtml.h
 
    pDisp->QueryInterface(IID_IHTMLInputElement, (LPVOID*)&pInput);
    pDisp->Release();
 
    if(pInput)
    {
     pInput->put_value(WideString(text));
 
     done = true;
 
      /*
      WideString mybuffer;
      pInput->get_value ( &mybuffer );
      ShowMessage ( mybuffer );
      */
 
     pInput->Release();
     }
    }
   }
    pAll->Release();
  }
 
  HTMLDoc->Release();
 }
  return done;
}

Re: setting form element values using ie TCppWebBrowser control

Andrew J. Burke15-Oct-11 14:50

Re: setting form element values using ie TCppWebBrowser control

15-Oct-11 14:50

/* Well I got this far I get 3 errors in the BrowserDocumentComplete event:

(C++ Error)BrowserFrm.cpp(53): E2285 Could not find match for 'TBrowserFrame::GetHTMLItem<ParentIntf>TComInterface<IHTMLElementCollection,&GUID_NULL>,char *,IHTMLFormElement * *)'

(C++ Error)BrowserFrm.cpp(58): E2285 Could not find match for 'TBrowserFrame::GetHTMLItem<ParentIntf>TComInterface<IHTMLFormElement,&GUID_NULL>,char *,IHTMLInputElement* *)'

(C++ Error)BrowserFrm.cpp(59): E2285 Could not find match for 'TBrowserFrame::GetHTMLItem<ParentIntf>TComInterface<IHTMLFormElement,&GUID_NULL>,char *,IHTMLInputElement* *)' */

//I marked the lines with the errors below:

//BrowserFrm.cpp

#include <vcl.h>
#pragma hdrstop

#include "BrowserFrm.h"
#include <utilcls.h>
#include <mshtml.h>
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma link "SHDocVw_OCX"
#pragma resource "*.dfm"
TBrowserFrame *BrowserFrame;
//---------------------------------------------------------------------------
__fastcall TBrowserFrame::TBrowserFrame(TComponent* Owner)
: TFrame(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TBrowserFrame::Go(AnsiString url)
{
Browser->Navigate(StringToOleStr(url),0,NULL,NULL,NULL);
}
//---------------------------------------------------------------------------
template<class ParentIntf, class ItemIntf>
HRESULT __fastcall TBrowserFrame::GetHTMLItem(ParentIntf *CollectionOrElement, const
WideString &name, ItemIntf** ppIntf)
{
TVariant vName = name;
TVariant vIndex = 0;
TComInterface disp;

HRESULT hRes = CollectionOrElement->item(vName, vIndex, &disp);
if( SUCCEEDED(hRes) )
hRes = disp->QueryInterface(__uuidof(ItemIntf),(LPVOID*)ppIntf);
return hRes;
}

//---------------------------------------------------------------------------
void __fastcall TBrowserFrame::BrowserDocumentComplete(TObject *Sender,
LPDISPATCH pDisp, Variant *URL)
{
if( Browser->Document )
{
TComInterface<IHTMLDocument2>HTMLDoc;
if(SUCCEEDED(Browser->Document->QueryInterface(
IID_IHTMLDocument2,(LPVOID*)&HTMLDoc) ) )
{
TComInterface<IHTMLElementCollection>forms;
if( SUCCEEDED(HTMLDoc->get_forms(&forms)) )
{
TComInterface<IHTMLFormElement>form;
/*Line 53 error*/ if( SUCCEEDED(GetHTMLItem(forms, "loginform", &form)) )
{
TComInterface<IHTMLInputElement>userid;
TComInterface<IHTMLInputElement>password;

/*Line 58 error*/ GetHTMLItem(form, "userid", &userid);
/*Line 59 error*/ GetHTMLItem(form, "password", &password);

if( userid )
{
userid->put_value(WideString("username"));
}

if( password )
{
password->put_value(WideString("password"));
}

form->submit();
}
}
}
}
}
//---------------------------------------------------------------------------

//BrowserFrm.h file

#ifndef BrowserFrmH
#define BrowserFrmH
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
#include "SHDocVw_OCX.h"
#include <OleCtrls.hpp>

#include <utilcls.h>
#include <mshtml.h>
//---------------------------------------------------------------------------

class TBrowserFrame : public TFrame
{
__published: // IDE-managed Components
TCppWebBrowser *Browser;
void __fastcall BrowserDocumentComplete(TObject *Sender,
LPDISPATCH pDisp, Variant *URL);

private: // User declarations
template<class ParentIntf, class ItemIntf>
HRESULT __fastcall GetHTMLItem(ParentIntf *CollectionOrElement, const
WideString &name, ItemIntf** ppIntf);

public: // User declarations
__fastcall TBrowserFrame(TComponent* Owner);
void __fastcall Go(AnsiString url);

};

//---------------------------------------------------------------------------
extern PACKAGE TBrowserFrame *BrowserFrame;
//---------------------------------------------------------------------------
#endif

-- modified 15-Oct-11 21:04pm.

App_15-Oct-11 20:58

App_

15-Oct-11 20:58

Change this line:

HRESULT __fastcall GetHTMLItem(ParentIntf *CollectionOrElement, const WideString &name, ItemIntf** ppIntf)

To this:

HRESULT __fastcall GetHTMLItem(TComInterface<ParentIntf> &CollectionOrElement, const WideString &name, ItemIntf** ppIntf)

Re: setting form element values using ie TCppWebBrowser control

Andrew J. Burke16-Oct-11 6:38

Re: setting form element values using ie TCppWebBrowser control

16-Oct-11 6:38

That Worked! It Fills the values but when I submit the form the web browser comes up with a dialog with a caption of: _ASSERTE: and Message of:
intf = 0 @ C:\Program Files\Borland\CBuilder6\Include\Vcl\utilcls.h/2916
Press[Y]es to terminate, [N]o to continue and [C]ancel to Debug

My code:

template<class ParentIntf, class ItemIntf>
HRESULT __fastcall TBrowserFrame::GetHTMLItem(TComInterface<ParentIntf> &CollectionOrElement, const WideString &name, ItemIntf** ppIntf)
{
TVariant vName = name;
TVariant vIndex = 0;
TComInterface<IDispatch>disp;

HRESULT hRes = CollectionOrElement->item(vName, vIndex, &disp);
if( SUCCEEDED(hRes) )
hRes = disp->QueryInterface(__uuidof(ItemIntf),(LPVOID*)ppIntf);
return hRes;
}

//---------------------------------------------------------------------------

void __fastcall TBrowserFrame::BrowserDocumentComplete(TObject *Sender,
LPDISPATCH pDisp, Variant *URL)
{
if( Browser->Document )
{
TComInterface<IHTMLDocument2>HTMLDoc;;
if(SUCCEEDED(Browser->Document->QueryInterface(
IID_IHTMLDocument2,(LPVOID*)&HTMLDoc) ) )
{
TComInterface<IHTMLElementCollection>forms;
if( SUCCEEDED(HTMLDoc->get_forms(&forms)) )
{
TComInterface<IHTMLFormElement>form;;
if( SUCCEEDED(GetHTMLItem(forms, "idpform", &form)) )
{
TComInterface<IHTMLInputElement>userid;
TComInterface<IHTMLInputElement>password;

GetHTMLItem(form, "txtUsername", &userid);
GetHTMLItem(form, "txtPassword", &password);

if( userid )
userid->put_value(WideString(username));

if( password )
password->put_value(WideString(pass));
//form->submit();
}
}
}
}
}
//---------------------------------------------------------------------------

App_16-Oct-11 7:44

App_

16-Oct-11 7:44

What you are likely seeing is a call to MessageBox() before the
exception is thrown. To turn that off, you can go into the Project
Options and add NO_PROMPT_ON_HRCHECK_FAILURE to the Conditionals list.
The exception will then be thrown without any prompting.

If you are still using the TComInterface wrapper, the '->' operator
validates whether the interface pointer is available or not. If it is
not, an ASSERT is thrown. To disable the prompt on that error, you
can define NO_PROMPT_ON_ASSERTE_FAILURE in the Project Options.

If you implement a try..catch block, it will catch errors normally without messagebox prompt interruptions.

(sample try catch)

try {
      buf = new char[512];
      if( buf == 0 )  throw "Memory allocation failure!";
    } 
catch( char * str ) {
      cout << "Exception raised: " << str << '\n';
    }

Re: setting form element values using ie TCppWebBrowser control

Andrew J. Burke18-Oct-11 5:16

Clarification regarding Boolean variable

18-Oct-11 5:16

Thankyou very much...every thing worked I added NO_PROMPT_ON_HRCHECK_FAILURE to the Conditionals list. and inserted a try/catch block around my code in the document complete event.

Now if every login page had the same names for their form & input names!

pix_programmer15-Oct-11 1:01

pix_programmer

15-Oct-11 1:01

Is there any difference between the following loops

C++

bool test;
do
{
  //some body

}
while(!test);

and

C++

bool test;
do
{
//some body

}
while(test==false);

Also what is the default value of boolean variable?

Re: i would like to elaborate further

André Kraak15-Oct-11 1:18

André Kraak

15-Oct-11 1:18

Both loops are the same.

~~The default value of boolean is false, but~~ You should never rely on the default value of a variable, if one is assigned (it might also be garbage) which depends on the compiler. For readability and to avoid possible problems always assign a initial value during variable declaration.

<Edit - default value boolean statement>

0100000101101110011001000111001011101001

modified 15-Oct-11 13:33pm.

Software_Developer15-Oct-11 1:47

Software_Developer

15-Oct-11 1:47

Both code blocks behave in the same way.

ALWAYS initialize your variables before use:
In the C++ standard, only global variables get default value of zero
if they are not explicitly initialized. For local variables it's not required
for the complier to clean up the content of the memory they are assigned to.
A local variable - if not explicitly initialized - will contain a garbage value.

Code 1

// 0 = FALSE
// 1 = TRUE


bool test=0;
int i=0;

do
{
  //some body
    i++;
    cout<<i<<" ";

}
while(!test);

if test==false then we are stuck in an eternal loop forever.
However if test==true then we only loop once.

The same goes for
Code 2

// 0 = FALSE
// 1 = TRUE

bool test=0;
int i=0;

do
{
//some body
    i++;
cout<<i<<" ";

}
while(test==false);

if test==false then we are stuck in an eternal loop forever.
However if test==true then we only loop once.

Albert Holguin15-Oct-11 7:24

Albert Holguin

15-Oct-11 7:24

Top coder is right, default values are not part of the standard. So it could be different from compiler to compiler, or completely random garbage.

Edit: changed my vote after your correction. Smile | :)

modified 15-Oct-11 20:12pm.

MartyTPS15-Oct-11 16:48

MartyTPS

15-Oct-11 16:48

They are the same loops. both compile to a cmp to the value 0 instruction. you would get an unitialized variable warning when compiled. the default is whatever happened to be randomly in that location on the stack or in that register (optimized into a register) previously (usually true, but not specified).

Pranit Kothari16-Oct-11 20:38

Pranit Kothari

16-Oct-11 20:38

If you are asking about default value, it will completely compiler dependent. Even if you work on release or debug build, don't surprise to see different results. Better idea is to explicitly initialize the value. Even in other cases, like by default Class members are private and structure members are public. Don't rely on defaults, explicitly write what you want.

Regards