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Webbrowser Control - Button coordinates

gammae
gammae asked
on
Medium Priority
309 Views
Last Modified: 2011-10-03

Hi,

I have a dialog that contain a webbrowser control. The html loaded in the control display a button (<input type=button id=mybutton>).

I can get the coordinate of the webbrowser control using GetWindowRect, however I can't figure any way to find the coordinate of the button.

Can anyone suggest a way to accomplish that?

Karl
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Commented:
Hello Karl,

You need something like this,
the code is not final and not tested, but i believe you can change it for your needs.

// replace with your WebBrowser pointer
CComPtr<IWebBrowser2> spBrowser;

long top = 0;
long left = 0;

CComPtr<IDispatch> spDocDisp;
spBrowser->get_Document( &spDocDisp );
if( !spDocDisp )
      return false;

CComQIPtr<IHTMLDocument2> spDoc( spDocDisp );
if( !spDoc )
      return false;

CComPtr<IHTMLElementCollection> spElements;
spDoc->get_all( &spElements );
if( !spElements )
      return false;

CComBSTR bsTagName( "button" );
CComVariant vtButton( bsTagName );
CComPtr<IDispatch> spButtonsDisp;
spElements->tags( vtButton, &spButtonsDisp );
if( !spButtonsDisp )
      return false;
CComQIPtr<IHTMLElementCollection> spButtonElements( spButtonsDisp );
if( !spButtonElements )
      return false;

CComBSTR bsID;

long count = 0;
spButtonElements->get_length( &count );
for( int i = 0; i < count; ++i )
{
      CComVariant vtIndex( i );
      CComPtr<IDispatch> spButtonDisp;
      if( SUCCEEDED( spButtonElements->item( vtIndex, vtIndex, &spButtonDisp ) ) )
      {
            CComQIPtr<IHTMLButtonElement> spButton( spButtonDisp );
            if( spButton )
            {
                  CComQIPtr<IHTMLElement> spButtonEl1( spButtonDisp );
                  spButtonEl1->get_id( &bsID );
                  if( bsID == "mybutton" )
                  {
                        CComQIPtr<IHTMLElement2> spButtonEl2( spButtonDisp );
                        spButtonEl2->get_clientTop( &top );
                        spButtonEl2->get_clientLeft( &left );
                        break;
                  }
            }
      }
}

and a link about elements measuring and positioning:
http://msdn.microsoft.com/library/default.asp?url=/workshop/author/om/measuring.asp

Good luck,
keyd.

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Commented:
Thanks a lot ofr the solution, I'll try to implement that in my project. The points were well deserved.

Karl
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