ATL / WTL / STL

8-Jul-03 3:05

I need to have a pair of std::string and int as key of the map. But doesn't seems to work. I am using Visual Studio 6.

Here is the test program i am trying

#pragma warning (disable:4786)

#include <iostream>
#include <string>
#include
#include <vector>
using namespace std;

#include <myclass.h>

void main()
{
map< pair<string, int="">, string> test;

CMyClass* c = new CMyClass();

// some useful processing ....

test.insert( pair< pair<string,int>,CMyClass*> > (("hello",35), c));

return;
}

Get folloowing error
error C2275: 'pair<struct std::pair<class="" std::basic_string<char,struct="" std::char_traits<char="">,class std::allocator<char> >,int>,class CMyClass *>' : illegal use of this type as an expression

When i change key from pair<string,int> to something non-pair, it works fine. Any idea? is it doable at all?

TIA

AlexO8-Jul-03 3:44

AlexO

8-Jul-03 3:44

typedef std::pair<MyFirstType, MySecondType> TMyKey;
typedef std::map<TMyKey, std::string> TMyMap;
//you might need to provide comparison function as well

Anonymous8-Jul-03 4:18

8-Jul-03 4:18

Thanks AlexO
Could you please give me a short example on how to define comparison operator
I am a newbie to STL stuff

AlexO8-Jul-03 4:37

AlexO

8-Jul-03 4:37

The following is just an example, it really depends on what kind of pair you have. The main idea is that std::map uses "<" to sort the entries.

struct comparepairs
{
bool operator()(const TMyKey& left, const TMyKey& right) const
{
if(left.first < right.first)
return true;
else if(left.first == right.first)
return left.second < right.second;
else
return false;
}
};

typedef std::map<TMyKey, std::string, comparepairs> TMyMap;

Anonymous8-Jul-03 4:46

8-Jul-03 4:46

Thanks again Alexo.
Still curious why the code i am trying is not working

map< pair<string, int="">, CMyClass*> test;
CMyClass* c;
test.insert( pair< pair<string,int>,CMyClass*> > (("hello",35), c));

is it some wrong syntax i am using?

AlexO8-Jul-03 6:32

AlexO

8-Jul-03 6:32

pair is a template class, which means it is declared when used

Anonymous wrote:
test.insert( pair< pair,

second usage of pair is wrong because pair without template parameters does not make sense

Joaquín M López Muñoz8-Jul-03 6:48

Joaquín M López Muñoz

8-Jul-03 6:48

It should be

test.insert( pair< pair<string,int>,CMyClass*> > (pair<string,int>("hello",35), c));

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Phil Martin7-Sep-03 14:57

Phil Martin

7-Sep-03 14:57

Here is a example that should work. It was a bit hard to read your code before, since all the bits between the < and > were thought to be html tags.

#include <map>
#include <string>
#include <utility>

void main()
{
std::map< std::pair<std::string, int*> , std::string> test;

int *value = new int;

// some useful processing ....
test.insert( std::make_pair( std::make_pair( std::string("hello"), 35), value) );

return;
}

But this is the way I prefer to do it, I find it much tidier:

void main()
{
typedef std::pair<std::string, int*> MyKey;
typedef std::map< MyKey , std::string> MyMap;

MyMap test;

int *value = new int;

// some useful processing ....
test[MyKey("hello", 35)] = value;

return;
}
Hopefully helpful,
Phil

Embed and Automate a Microsoft Excel Worksheet with MFC

Michael Dunn6-Jul-03 20:30

Michael Dunn

6-Jul-03 20:30

Check out this article[^] where I cover dialog controls and message handling (link[^] to the relevant section)

--Mike--
"I'm working really, really fast at the moment, so a 3 minute outage becomes, due to time dilation, a 5 minute outage."
-- Chris Manuder, relativistic system administrator
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber

Mardigin6-Jul-03 18:09

Mardigin

6-Jul-03 18:09

I followed the tutorial at the following address...

http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/q184/6/63.asp&NoWebContent=1

It works great! But I would prefer if the excel menu did not merge with my apps menue. Is there anyway to keep the user from seeing and using the excel menu and tool bars?

In truth what I would prefer to do would be to embed the excel worksheet or spreadsheet into a dialog box like you can with office xp by using the Microsoft Office Spreadsheet 9.0 activeX Control. Does anyone know if this is possible using office 97? I was able to do it in VB, but not in MFC.

Thank you very much.

Mardigin

Was able to remove...

Mardigin13-Jul-03 5:01

Mardigin

13-Jul-03 5:01

I was able to remove the formula bar and the Grid headings with the following code.

app.SetDisplayFormulaBar(FALSE);
Window win = app.GetActiveWindow();
win.SetDisplayHeadings(FALSE);

I still want to remove the "Formatting Toolbar" and all of the menus associated with Excel.

Anyideas.

Classes of interest are --> Menu, MenuBar, MenuBars, MenuItem, MenuItems, Menus, Toolbar, ToolbarButton, ToolbarButtons, Toolbars

Sincerely,

Mardigin

STL vector sort.

⁷³Zeppelin3-Jul-03 7:33

⁷³Zeppelin

3-Jul-03 7:33

I realize this issue was addressed a few threads below
this one. However, I have attempted to implement the overloading of the > operator (unsuccessfully) as follows:

<code>
class CSpringNode  
{
public:
	unsigned int GetOldNodeIndex();
	unsigned int EntryTracker;
	double ycoord;
	double xcoord;
	double Energy;
	unsigned int NodeIndex;
	unsigned int Valence;
	CM3DVector2f NodeCoords;
	CSpringNode(CM3DVector2f NodeCoords, unsigned int Index);
	virtual ~CSpringNode();

	bool operator >(const CSpringNode& Node1, const CSpringNode& Node2) const	
	{
		return (Node1.Energy > Node2.Energy);
	}


protected:
	CSpringNode(){};	// Default constructor - do not use

private:
	unsigned int m_uiOldNodeIndex;
};
</code>

but on compile I get:

--------------------Configuration: Solver2D - Win32 Debug--------------------
Compiling...
Solver2D.cpp
c:\program files\microsoft visual studio\myprojects\solver2d\springnode1.h(28) : error C2804: binary 'operator >' has too many parameters
c:\program files\microsoft visual studio\myprojects\solver2d\springnode1.h(28) : error C2333: '>' : error in function declaration; skipping function body
SpringNode1.cpp
c:\program files\microsoft visual studio\myprojects\solver2d\springnode1.h(28) : error C2804: binary 'operator >' has too many parameters
c:\program files\microsoft visual studio\myprojects\solver2d\springnode1.h(28) : error C2333: '>' : error in function declaration; skipping function body
SpringSolver.cpp
c:\program files\microsoft visual studio\myprojects\solver2d\springnode1.h(28) : error C2804: binary 'operator >' has too many parameters
c:\program files\microsoft visual studio\myprojects\solver2d\springnode1.h(28) : error C2333: '>' : error in function declaration; skipping function body
Generating Code...
Error executing cl.exe.
Creating browse info file...

Solver2D.exe - 6 error(s), 0 warning(s)

I can't seem to spot the error. Any advice?

Re: STL vector sort.

Michael Dunn3-Jul-03 7:43

Michael Dunn

3-Jul-03 7:43

Your operator > is a member of the class, so it only takes one parameter (the right-hand side of the comparison). The object on the left-hand side of the comparison is this.

bool operator >(const CSpringNode& rhs) const
{
  return (Energy > rhs.Energy);
}

--Mike--
"So where does that leave us? Well, it leaves us right back where we started, only more confused than before." -- Matt Gullett
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber

Re: STL vector sort.

Alexandru Savescu3-Jul-03 23:15

Alexandru Savescu

3-Jul-03 23:15

Michael's answer is correct.
I am not sure about this, but I think you need implement the operator <

Best regards,
Alexandru Savescu

P.S. Interested in art? Visit this!

Re: STL vector sort.

Jörgen Sigvardsson12-Aug-03 13:52

Jörgen Sigvardsson

12-Aug-03 13:52

Yep. All ordering functions in STL are based on operator<.

--
Ich, du, sie, er, es, ihr, sie, Sie.

Adding ATL Simple object

Yoav Zur30-Jun-03 20:28

Yoav Zur

30-Jun-03 20:28

Hi I have a project containing an ATL Simple object,
It's a VC++ server project.
I am using VB6 to connect to the object.
Now I wanted to add more ATL Simple objects.
I used the wizard and marked the new objects with
Dual support.
But when I try to connect with the objects in VB6 I get
an error msg: 430, that the object doesn’t support automation.
What did I do wrong??? Cry | :((

Yoav

Re: Adding ATL Simple object

Anonymous1-Jul-03 0:20

Message Reflection for WM_CTLCOLORSTATIC

1-Jul-03 0:20

Although i'm not a VB programmer it sounds to me that your interface does not inherit from IDispatch (or is not a dispinterface). VB(and scripting languages) need IDispatch to communicate. Check your IDL file to see if this is the case.

Tommy2k30-Jun-03 3:20

Tommy2k

30-Jun-03 3:20

I'm making a hyperlink control which i obviously need to color but i found out that chil controls don't automaticly receive the WM_CTLCOLORSTATIC message so i thought i needed to do this with Message Reflection. I however don't have a clue how to do this except for Notify messages. Can somebody help me out?

Thomas A. Rieck4-Jul-03 8:10

Thomas A. Rieck

4-Jul-03 8:10

Have you looked into handling the OCM_CTRLCOLORSTATIC message with reflection?

Tommy2k4-Jul-03 9:25

Tommy2k

4-Jul-03 9:25

If I use this, how do I reflect the message from to parrent to the child?