C / C++ / MFC Discussion Boards

Re: Resizing dialog-based app and its controls

Christian Graus15-Jan-06 12:13

15-Jan-06 12:13

I believe there's a CP class that does this as well, but you'd have to have a look for yourself, I'm not sure.

Christian Graus - Microsoft MVP - C++

Re: Resizing dialog-based app and its controls

Anilkumar K V15-Jan-06 18:16

Anilkumar K V

15-Jan-06 18:16

Handle WM_SIZE message

Re: Resizing dialog-based app and its controls

David Crow16-Jan-06 3:12

David Crow

16-Jan-06 3:12

See the "Extras" section of this article.

"The words of God are not like the oak leaf which dies and falls to the earth, but like the pine tree which stays green forever." - Native American Proverb

Re: Resizing dialog-based app and its controls

Jamaica16-Jan-06 8:02

Jamaica

16-Jan-06 8:02

Thanks guys --- I ended up biting the bullet and doing it "longhand". One day I may refactor it into something like what was in David's "extras"... but it would take considerably more sophistication to cope with the kind of form layout I have --- lines with 3 or 4 edit boxes across the full screen needing to be resized proportionally in the horizontal direction, while their labels stay constant size; image "window" resized to take up the remaining space among the edit boxes & buttons...

Re: Resizing dialog-based app and its controls

Shraddhan22-Jan-06 22:56

Shraddhan

22-Jan-06 22:56

That's what I do too, doing each control 'by hand'. I reckon it can give a much better appearance, as various things need different changes.

In fact, in some dialogs I even alter the layout as the size changes. It can be a bit of a pain to do, so it is worth doing methodically, and commenting clearly. It is easy to get into a muddle doing this kind of thing.

Oh, I also take screen images and load these into graphics software so that I can enlarge them enough to be able to count the pisels.

Shraddhan

Problem with std::list

Mateusz Karbowy15-Jan-06 10:36

Mateusz Karbowy

15-Jan-06 10:36

Hello!

I got class CMyClass:

class CMyClass<br />
{<br />
private:<br />
  CString Name;<br />
public:<br />
  CString GetName() const;<br />
};

I want to make list of objects CMyClass, so I do:

typedef list<CMyClass> MyLst;<br />
MyLst MyList;

Now I want to make list of iterators to my previous list, so I do:

typedef list<MyLst::iterator> pMyLst;<br />
pMyLst pMyList;

Let's assume I have some elements in list MyList and I want to fill list pMyList with iterators from MyList list:

for (MyLst::iterator it = MyList.begin(); it != MyList.end(); it++)<br />
  pMyList.push_back(it);

Now I would like to retrieve some data from my iterator list, and I do:

for (pMyLst::iterator it = pMyList.begin(); it != pMyList.end(); it++)<br />
{<br />
  CString Name;<br />
  Name = (*it)->GetName();

// program crashes here
}

Help!

Re: Problem with std::list

Christian Graus15-Jan-06 11:12

Christian Graus

15-Jan-06 11:12

Mateusz Karbowy wrote:
(*it)->GetName();

You didn't store pointers, so why are you using -> instead of . ?

Christian Graus - Microsoft MVP - C++

Re: Problem with std::list

Stephen Hewitt15-Jan-06 11:51

Stephen Hewitt

15-Jan-06 11:51

He stored iterators, which are conceptually very similar to pointers. (*it) gives the iterator he stored and (*it)-> returns the object referred to by the stored iterator.

Steve

Re: Problem with std::list

Christian Graus15-Jan-06 11:53

Christian Graus

15-Jan-06 11:53

I don't think that is true. In any decent compiler, you may not treat an iterator as a pointer, and once you dereference the iterator, you get the object you stored, not a pointer to it.

Christian Graus - Microsoft MVP - C++

Re: Problem with std::list

Stephen Hewitt15-Jan-06 12:04

Stephen Hewitt

15-Jan-06 12:04

typedef list<CMyClass> MyLst;
A list of CMyClasss

typedef list<MyLst::iterator> pMyLst;
A list of iterators into a MyLst

pMyLst pMyList;
Contains list<CMyClass>:iterators ("expanded" typedef).

(*it)->
Calls operator-> on a list<CMyClass>::iterator

Steve

Re: Problem with std::list

Christian Graus15-Jan-06 12:12

Christian Graus

15-Jan-06 12:12

Stephen Hewitt wrote:
Calls operator-> on a list<CMyClass>:iterator

OK, I get it now. The problem is that there's a list of lists here. I didn't spot that. I *never* use typedefs with STL for this reason, it just obsfucates the code.

Christian Graus - Microsoft MVP - C++

Re: Problem with std::list

Christian Graus15-Jan-06 12:14

Christian Graus

15-Jan-06 12:14

I don't believe a list of iterators is the right approach. Why would you store iterators, instead of the underlying objects ? Store pointers to your class, if you want them to point to the same object.

Christian Graus - Microsoft MVP - C++

Re: Problem with std::list

Stephen Hewitt15-Jan-06 12:22

Stephen Hewitt

15-Jan-06 12:22

I can't see anything wrong with your code. Perhaps attach crash details. I suspect the problem is not in the code you posted but somewhere "in between". For example - maybe the element is removed from the list somewhere.

Steve

Re: Problem with std::list

Mateusz Karbowy15-Jan-06 14:07

Mateusz Karbowy

15-Jan-06 14:07

Thank you Steve and Chris. You're right Steve, this code is ok. I've spotted the problem in a different place and now it works fine. Thanks for support mates! Smile | :)

dll project does not output a .lib file

Themis15-Jan-06 4:52

Themis

15-Jan-06 4:52

Hi, I have a solution with some projects that produce dlls. However some of these projects also generate a .lib file for their respective dll in order for another project to link with dll at linking-time. However some other dll projects do not provide me a .lib file. Why does this happen?
At first I thought I missed an option at the property page of the latter projects but this is not the case, as I compared the property pages finding no such differences.

What should I do in order for all my dll projects provide me with a lib file?

Thank you.

PS - I'm using VS2005

Re: dll project does not output a .lib file

Nish Nishant15-Jan-06 5:37

Nish Nishant

15-Jan-06 5:37

Typically, this means that you are not exporting anything from the DLL. Is that the case?

Regards,
Nish

My blog : Nish’s thoughts on MFC, C++/CLI and .NET

Re: dll project does not output a .lib file

Themis15-Jan-06 6:40

Themis

15-Jan-06 6:40

Yeap actually that was the case, I forgot to export the symbols. Thanks for the tip, I could have gone days without realizing it.

CHeaderCtrl::SetImageList

paper6715-Jan-06 4:09

paper67

15-Jan-06 4:09

Hi,

I attach an image list to the CHeaderCtrl with a call to CHeaderCtrl::SetImageList.
Later I use CListCtrl::SetImageList to attach an image list to the CListCtrl object used for the items.
The 2 image lists are different. Every time I call CListCtrl::SetImageList my image list of the
header control gets overwritten with that of the list control.
Is this a bug ?? or is it impossible to maintain 2 different image lists.

Thx

Re: CHeaderCtrl::SetImageList

Owner drawn15-Jan-06 19:43

Owner drawn

15-Jan-06 19:43

Are you sure that you are not doing something wrong.

Please recheck your code to see.

Or maybe you can change the sequence a bit. Try assigning an imagelist to the list control first and then the header control.

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--Owner Drawn Rose | [Rose]

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Re: CHeaderCtrl::SetImageList

paper6716-Jan-06 8:05

paper67

16-Jan-06 8:05

I have installed an OnSetImageList message handler for the header control. THis one gets called when an image list is installed for the header control and it gets called a second time when the CListctrl object is assigned his image list. To install the image list of the header control I do the following call from within the OnCreate message handler of a derived CListCtrl Object (CXListCtrl) :

m_HdCtrl.SetImageList(&m_ilSymb);

m_HdCtrl has been subclassed to the Header control.

To install the image list of the CListCtrl object itself I do the following call in the OnCreate handler of a CXListCtrl derived class. (CPCntCtrl)

SetImageList(&m_ilCntSymb, LVSIL_SMALL);

Can someone tell me please what is going on here ?

Thx

single/multiple selection in List control

IlanTal15-Jan-06 4:08

IlanTal

15-Jan-06 4:08

I have a List control where sometimes I want to limit it to a single selection and other times to multiple selections.
You choose the Single Selection parameter at design time, but I'm sure there must be a way to change in on the fly. It is most like a SENDMESSAGE, but what is the message I need to send?

Thanks,
Ilan

Re: single/multiple selection in List control

FarPointer15-Jan-06 4:28

FarPointer

15-Jan-06 4:28

hi ,

Try SetWindowLong Function .

Regards
FarPointer.

Re: single/multiple selection in List control

sps-itsec4615-Jan-06 6:55

sps-itsec46

15-Jan-06 6:55

Hi Ilan,

the following will result in a single-selection list:

m_myList.ModifyStyle(0, LVS_SINGLESEL);

this one will result in a multi-selection list:

m_myList.ModifyStyle(LVS_SINGLESEL, 0);

first parameter removes the passed style, second parameter adds the passed style.

Regards, mykel

If they give you lined paper, write the other way!

Re: single/multiple selection in List control

IlanTal15-Jan-06 19:17

IlanTal

15-Jan-06 19:17

Hi Mykel,
This is EXACTLY what I was looking for! It solves the problem.

Thank you very much,
Ilan

need suggestion(constructer? / better?)

neodeaths14-Jan-06 23:33

neodeaths

14-Jan-06 23:33

int main()
{
int *ptr[2];

if(ptr[0] = null)
{
cout<<"this is empty"<

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