ShowWindow and DoModal - ATL / WTL / STL Discussion Boards

Joaquín M López Muñoz20-Apr-03 20:09

20-Apr-03 20:09

vars.insert(pair<String, variable>(<font color=#ff0000>(</font>String("hi"), variable(6)<font color=#ff0000>)</font>);

Try removing the extra pair of parentheses marked in red.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Another problem with maps

The Unknown21-Apr-03 3:27

The Unknown

21-Apr-03 3:27

i need those parentheses.

It works now. I moved things around and lowered the class size and it seems to be working now.

WTL splitters not sending WM_SIZE to both panes

Kibble19-Apr-03 12:20

Kibble

19-Apr-03 12:20

i have a bunch of CSplitterWindows, 2 CSplitterWindows and a CHorSplitterWindow, organized like this:

<br />
+----------------------------------------+<br />
|                  ||                    |<br />
|                  ||                    |<br />
|                  ||                    |<br />
|                  ||                    |<br />
|                  ||                    |<br />
|========================================|<br />
|                  ||                    |<br />
|                  ||                    |<br />
|                  ||                    |<br />
|                  ||                    |<br />
|                  ||                    |<br />
+----------------------------------------+<br />

with some hackery i made the two vertical splitters stay together, to simulate a 4 way splitter. the problem is when the vertical splitters are moved to the left, the left panes don't recieve WM_SIZE, and when the horizontal splitter is moved up, it doesn't send WM_SIZE to the upper pane. all windows recieve WM_SIZE properly if the splitters are moved right, or down. is this a glitch in ATL or a problem of mine? either way, how would i go about fixing it? i assume if its ATL's problem, i have to derive two new classes and send WM_SIZE from my new classes?

oops, diagram got messed up, here is the code i use to set up the panes:

m_HorSplitter->SetSplitterPane(SPLIT_PANE_TOP, m_TopSplitter->m_hWnd);
m_HorSplitter->SetSplitterPane(SPLIT_PANE_BOTTOM, m_BottomSplitter->m_hWnd);
m_TopSplitter->SetSplitterPane(SPLIT_PANE_LEFT, m_Views[0]);
m_TopSplitter->SetSplitterPane(SPLIT_PANE_RIGHT, m_Views[1]);
m_BottomSplitter->SetSplitterPane(SPLIT_PANE_LEFT, m_Views[2]);
m_BottomSplitter->SetSplitterPane(SPLIT_PANE_RIGHT, m_Views[3]);

Re: WTL splitters not sending WM_SIZE to both panes

Kibble21-Apr-03 8:00

Kibble

21-Apr-03 8:00

anyone?

Dawing image to client device context in ATL

itay_k17-Apr-03 1:11

itay_k

17-Apr-03 1:11

Hello,

I have a byte array in dialog object on ATL project, and i want to draw the image that represent the bytes array to my dialog.

Threre is any Article that can help me to draw the picture to the client device context? becuase i did it, but i don't see any picture.

Any information about this issue will help...
Thank's alot,
Itay.

Re: Dawing image to client device context in ATL

Paolo Messina18-Apr-03 6:14

Paolo Messina

18-Apr-03 6:14

Hi,

Are you drawing in the WM_PAINT handler or just using a CClientDC inside some function? Maybe during dialog initialization?

You should draw in the WM_PAINT handler if you want your drawing to be permanent, otherwise the next time window is updated your drawing will be lost.

Paolo

------
Why spend 2 minutes doing it by hand when you can spend all night plus most of the following day writing a system to do it for you? - (Chris Maunder)

Re: Dawing image to client device context in ATL

itay_k19-Apr-03 8:30

itay_k

19-Apr-03 8:30

I did it inside the OnDraw function.

ShowWindow and DoModal

super16-Apr-03 18:45

super

16-Apr-03 18:45

Hi Guys,
I have a small doubt..In the following code im creating a window and then displaying as modelless using ShowWindow..

<br />
        CMyWindow wnd;<br />
	RECT rect;<br />
	rect.top=0;<br />
	rect.left=0;<br />
	rect.bottom = 0;<br />
	rect.right = 0;<br />
	wnd.Create( NULL,rect, _T("Hidden_Window"),WS_OVERLAPPEDWINDOW);<br />
        wnd.ShowWindow(SW_HIDE);<br />
        CMainDlg dlgMain;<br />
        if(dlgMain.Create(wnd.m_hWnd) == NULL)<br />
	{<br />
		ATLTRACE(_T("Main dialog creation failed!\n"));<br />
		return 0;<br />
	}<br />
	<big>dlgMain.ShowWindow(nCmdShow);</big><br />
<br />

MainDlg is a child of Wnd(which is hidden)..Now this works fine but the problem is that now i want it as Modal Dialog..So if i replace ShowWindow by DoModal
I get assertion failure saying that handle of created window is null..
So any idea..

cheers,
Super
------------------------------------------
Too much of good is bad,mix some evil in it

Re: ShowWindow and DoModal

Stephane Rodriguez.16-Apr-03 18:53

Stephane Rodriguez.

16-Apr-03 18:53

I don't know if this applies to your code, but usually with modal boxes, the only thing you do is call .DoModal(). You don't create the window yourself, hence the ASSERT failure.

problem with STL map, string (ignore earlier post)

Matthew Fleming15-Apr-03 7:49

Matthew Fleming

15-Apr-03 7:49

Netmeisters,

I am trying to do something which should be simple. Using Visual C++ I want to create a map containing an STL string as a key and my own type as a value.

#include <string>
#include <map>
#include <iostream>

using namespace std;
map<string,CReport>slips;

Then to add a pair to the map:

string str;
pair<map<string,CReport>::iterator, bool> ret =
slips.insert(map<string,CReport>::value_type(str,report));

But this produces a host of error messages that I've included below.
Can't figure these out at all.

Any assistance much appreciated.

Matthew Fleming
mgf@mcw.edu

c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(138) : while compiling class-template member function 'bool std::less<_Ty>::operator ()(const _Ty &,const std::string &) const'
with
[
_Ty=std::string
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\map(36) : see reference to class template instantiation 'std::less<_Ty>' being compiled
with
[
_Ty=std::string
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(19) : see reference to class template instantiation 'std::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,_Mfl>' being compiled
with
[
_Kty=std::string,
_Ty=CReport,
_Pr=std::less<std::string>,
_Alloc=std::allocator<std::pair<const std::string,CReport>>,
_Mfl=false
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(61) : see reference to class template instantiation 'std::_Tree_nod<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,CReport,std::less<std::string>,std::allocator<std::pair<const std::string,CReport>>,false>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(83) : see reference to class template instantiation 'std::_Tree_ptr<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,CReport,std::less<std::string>,std::allocator<std::pair<const std::string,CReport>>,false>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(101) : see reference to class template instantiation 'std::_Tree_val<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,CReport,std::less<std::string>,std::allocator<std::pair<const std::string,CReport>>,false>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\map(77) : see reference to class template instantiation 'std::_Tree<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,CReport,std::less<std::string>,std::allocator<std::pair<const std::string,CReport>>,false>
]
c:\Palm\dpCold\DpCGenCond.cpp(201) : see reference to class template instantiation 'std::map<_Kty,_Ty,_Pr,_Alloc>' being compiled
with
[
_Kty=std::string,
_Ty=CReport,
_Pr=std::less<std::string>,
_Alloc=std::allocator<std::pair<const std::string,CReport>>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::list<_Ty,_Alloc> &,const std::list<_Ty,_Alloc> &)' : could not deduce template argument for 'const std::list<_Ty,_Ax> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::list<_Ty,_Alloc> &,const std::list<_Ty,_Alloc> &)' : could not deduce template argument for 'const std::list<_Ty,_Ax> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::list<_Ty,_Alloc> &,const std::list<_Ty,_Alloc> &)' : could not deduce template argument for 'const std::list<_Ty,_Ax> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &,const std::_Ptrit<_Ty,_Diff,_Pointer,_Reference,_Pointer2,_Reference2> &)' : could not deduce template argument for 'const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &,const std::_Ptrit<_Ty,_Diff,_Pointer,_Reference,_Pointer2,_Reference2> &)' : could not deduce template argument for 'const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &,const std::_Ptrit<_Ty,_Diff,_Pointer,_Reference,_Pointer2,_Reference2> &)' : could not deduce template argument for 'const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2676: binary '<' : 'const std::string' does not define this operator or a conversion to a type acceptable to the predefined operator

Re: problem with STL map, string (ignore earlier post)

Joaquín M López Muñoz15-Apr-03 8:03

Joaquín M López Muñoz

15-Apr-03 8:03

Ummm... You sure the error is where you think it is? Try compiling the following sample (which works fine in VC++ 6.0):

#include <string>
#include <map>
#include <iostream>
 
struct CReport{};
 
using namespace std;     
map<string,CReport>slips;
 
int main()
{
  string str;
  CReport report;
  pair<map<string,CReport>::iterator, bool> ret = 
    slips.insert(map<string,CReport>::value_type(str,report));
 
  return 0;
}

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: problem with STL map, string (ignore earlier post)

Matthew Fleming15-Apr-03 8:13

Matthew Fleming

15-Apr-03 8:13

Well, if I comment out

pair<map<string,CReport>::iterator, bool> ret =
slips.insert(map<string,CReport>::value_type(str,report));

I don't see the error messages.

Maybe I should mention that this is part of a fairly complicated thing. It is part of a palm conduit lib which is linked against openssl libraries.

Matthew Fleming

Re: problem with STL map, string (ignore earlier post)

Mike Dimmick16-Apr-03 4:17

Mike Dimmick

16-Apr-03 4:17

Joaquín's example builds fine for me with VC.NET 7.0.

I'm not entirely sure, but I think that the compiler is failing to find a suitable 'operator<' for std::string (which is of course normally a typedef for std::basic_string< char >).

I can replicate your error by removing the #include <string> line. Are you sure you haven't actually got '#include <string.h>'?

Examining the preprocessed output (use the C++/Preprocessor/Generate Preprocessed File option) shows that std::string and std::basic_string are defined in the internal header file <xstring> but that the operators are defined in <string>.

Ensure that <string> is included, and you should be fine.

The overload of operator< that takes two basic_string parameters (with matching template arguments) in this implementation is a namespace-scope template function, defined at line 125 of <string>.

--
Mike Dimmick

Re: problem with STL map, string (ignore earlier post)

Matthew Fleming16-Apr-03 6:30

Matthew Fleming

16-Apr-03 6:30

Yes, you are right, the problem was a missing include. In this program I have to do some C style string handling, so I had #include <string.h>. I thought I also had #include <string>, but I didn't. Apologies to all for my stupidity, and thank you for your assistance.

Matthew Fleming

Re: problem with STL map, string (ignore earlier post)

Matthew Fleming16-Apr-03 6:32

Matthew Fleming

16-Apr-03 6:32

Mike Dimmick wrote:
I can replicate your error by removing the #include line. Are you sure you haven't actually got '#include '?

Yes, you are right, the problem was a missing include. In this program I have to do some C style string handling, so I had #include <string.h>. I thought I also had #include <string>, but I didn't. Apologies to all for my stupidity, and thank you for your assistance.

Matthew Fleming

Re: problem with STL map, string (ignore earlier post)

Mike Dimmick16-Apr-03 23:43

Mike Dimmick

16-Apr-03 23:43

Just in case it happens again:

You can see the instantiation stack of what's being compiled after the error message in the 'see reference' lines. This shows the function that VC had selected to instantiate for the previous one. Working back along this stack we see that it was trying to compile std::map< std::string, CReport, std::less< std::string >, std::allocator< blah > >::insert(). In trying to compile that, it needed to instantiate an internal class member std::_Tree< blah > etc. The compiler lists the lines at which it needed to instantiate something else. From this we can see that it needed to locate an operator< to compare two std::strings. From that I deduced that somehow the appropriate operator wasn't being found.

This is a big improvement over VC6, which doesn't tell you _why_ it's trying to locate such a routine.

--
Mike Dimmick

problem with STL map, string

Matthew Fleming15-Apr-03 7:48

Matthew Fleming

15-Apr-03 7:48

Netmeisters,

I am trying to do something which should be simple. Using Visual C++ I want to create a map containing an STL string as a key and my own type as a value.

#include <string>
#include
#include <iostream>

using namespace std;
map<string,creport>slips;

Then to add a pair to the map:

string str;
pair<map<string,creport>::iterator, bool> ret =
slips.insert(map<string,creport>::value_type(str,report));

But this produces a host of error messages that I've included below.
Can't figure these out at all.

Any assistance much appreciated.

Matthew Fleming
mgf@mcw.edu

c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(138) : while compiling class-template member function 'bool std::less<_Ty>::operator ()(const _Ty &,const std::string &) const'
with
[
_Ty=std::string
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\map(36) : see reference to class template instantiation 'std::less<_Ty>' being compiled
with
[
_Ty=std::string
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(19) : see reference to class template instantiation 'std::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,_Mfl>' being compiled
with
[
_Kty=std::string,
_Ty=CReport,
_Pr=std::less<std::string>,
_Alloc=std::allocator<std::pair<const std::string,creport="">>,
_Mfl=false
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(61) : see reference to class template instantiation 'std::_Tree_nod<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,creport,std::less<std::string>,std::allocator<std::pair<const std::string,creport="">>,false>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(83) : see reference to class template instantiation 'std::_Tree_ptr<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,creport,std::less<std::string>,std::allocator<std::pair<const std::string,creport="">>,false>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\xtree(101) : see reference to class template instantiation 'std::_Tree_val<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,creport,std::less<std::string>,std::allocator<std::pair<const std::string,creport="">>,false>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\map(77) : see reference to class template instantiation 'std::_Tree<_Traits>' being compiled
with
[
_Traits=std::_Tmap_traits<std::string,creport,std::less<std::string>,std::allocator<std::pair<const std::string,creport="">>,false>
]
c:\Palm\dpCold\DpCGenCond.cpp(201) : see reference to class template instantiation 'std::map<_Kty,_Ty,_Pr,_Alloc>' being compiled
with
[
_Kty=std::string,
_Ty=CReport,
_Pr=std::less<std::string>,
_Alloc=std::allocator<std::pair<const std::string,creport="">>
]
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::list<_Ty,_Alloc> &,const std::list<_Ty,_Alloc> &)' : could not deduce template argument for 'const std::list<_Ty,_Ax> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::list<_Ty,_Alloc> &,const std::list<_Ty,_Alloc> &)' : could not deduce template argument for 'const std::list<_Ty,_Ax> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::list<_Ty,_Alloc> &,const std::list<_Ty,_Alloc> &)' : could not deduce template argument for 'const std::list<_Ty,_Ax> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &,const std::_Ptrit<_Ty,_Diff,_Pointer,_Reference,_Pointer2,_Reference2> &)' : could not deduce template argument for 'const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &,const std::_Ptrit<_Ty,_Diff,_Pointer,_Reference,_Pointer2,_Reference2> &)' : could not deduce template argument for 'const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &,const std::_Ptrit<_Ty,_Diff,_Pointer,_Reference,_Pointer2,_Reference2> &)' : could not deduce template argument for 'const std::_Ptrit<_Ty,_Diff,_Pointer2,_Reference2,_Pointer2,_Reference2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
c:\Program Files\Microsoft Visual Studio .NET\Vc7\include\functional(139) : error C2676: binary '<' : 'const std::string' does not define this operator or a conversion to a type acceptable to the predefined operator

Re: problem with STL map, string

valikac16-Apr-03 5:38

valikac

16-Apr-03 5:38

What data type is report? I recommend std::pair.

Kuphryn

Why the function istringstream.getline is not working?

George215-Apr-03 3:56

George2

15-Apr-03 3:56

Hi, everyone!

Please look at the sample codes below:

Output:
--------
12
2
Null is appended!
0
--------

Source code:

--------
#include <iostream>
#include <string>
#include <sstream>

using namespace std;

int main()
{
char input[] = "12\n3456789\n123456789";
char output [3];

istringstream is (input);
while (is.getline (output, sizeof (output), '\n'))
{
cout << output << endl;
cout << strlen (output) << endl;
if (0 == output [strlen (output)])
{
cout << "Null is appended! " << endl;
}
cout << unsigned int (output [strlen (output)]) << endl;
}

return 1;
}
--------

But when I change "char output [3];" to "char output [0xff];", the output
is OK! Tt is,

--------
12
2
Null is appended!
0
3456789
7
Null is appended!
0
123456789
9
Null is appended!
0
--------

I have made a reference to MSDN and failed to find any answers.
Who can explain the reason?

Thanks in advance,
George

Re: Why the function istringstream.getline is not working?

Tim Smith15-Apr-03 4:47

Tim Smith

15-Apr-03 4:47

3 characters isn't enough to hold the longer line, 255 is.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: Why the function istringstream.getline is not working?

George215-Apr-03 16:06

George2

15-Apr-03 16:06

Thanks, Tim buddie!

Can you explain me the internal reason why the
loop only executes one time when the sizeof
buffer is 3?

regards,
George

Re: Why the function istringstream.getline is not working?

Tim Smith16-Apr-03 2:17

Tim Smith

16-Apr-03 2:17

This is my guess:

On the second iteration, it needs to place the line containing "3456789" into the buffer you supplied. Since the buffer is too small, it returns false. Thus your loop terminates.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: Why the function istringstream.getline is not working?

George217-Apr-03 15:41

George2

17-Apr-03 15:41

Thanks, Tim buddy!

George

How to use ActiveX controls in WTL?

Ernesto D.14-Apr-03 14:02

Ernesto D.

14-Apr-03 14:02

Hi, i dont have much (actually any) experience using ActiveX controls, Say i want to use one like the WinSock Control, or maybe the MSFlexGrid, on my application, How do i do it?, can someone point me in the right direction?

Thanks!

Re: How to use ActiveX controls in WTL?

Stephane Rodriguez.14-Apr-03 21:33

Stephane Rodriguez.

14-Apr-03 21:33

There are visual ActiveX controls, and windowless ActiveX controls. I assume you are talking about visual controls.

Once the WTL setup is installed, copy the WTL class wizard (AtlApp60.awx + setup.js) files in the Microsoft Visual Studio \ Common \ MSDev98 \ IDE \ Bin.

Then two new project templates should appear when you create new projects.

Choose ATL/WTL App Wizard. In the wizard pages, be sure to check "ActiveX controls".

Once done, go into the resource tab, open a dialog box, right-click on it and choose "Insert Active Controls". You are done!

Technically speaking, a WTL dialog that intends to support ActiveX controls derives from the CAxDialogImpl base class. Which is what you automatically get by checking the appropriate box in the WTL wizard.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.