C / C++ / MFC

14-Jun-06 3:09

Abhi Lahare wrote:

Can I use set_intersection function to find out the itersection of containers which contains user defined type objects

Yes you can.

For that you have create your binary predicate function and use it as a last parameter of the set_intersection function.

for e.g

bool mod_lesser (int elem1, int elem2 )<br />
{<br />
   if ( elem1 < 0 ) <br />
      elem1 = - elem1;<br />
   if ( elem2 < 0 ) <br />
      elem2 = - elem2;<br />
   return elem1 < elem2;<br />
}

you may change int to UDT.

Abhi Lahare wrote:
it works only with standard datatypes?

Not neccessary,It should works for UDT also. Smile | :)

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You can if you think you can
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Re: STL set_intersection

_AnsHUMAN_ 14-Jun-06 3:13

_AnsHUMAN_

14-Jun-06 3:13

In context to Laxman's reply
When you perform operations on User Defined Types(UDT) you should tell the "-" operator (in this case), how to work with UDT's. (Apply Overriding concepts)

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: STL set_intersection

Laxman Auti14-Jun-06 3:26

ImageList in ListCtrl behaves differently in debug or release

14-Jun-06 3:26

_AnShUmAn_ wrote:
(Apply Overriding concepts)

Not Overriding Overloading

You may overload the logical operaters like <, > and Mathmatical operators like - for Binary predicate conditional checking. so that the program is generalised.

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You can if you think you can
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e-DJ14-Jun-06 2:47

e-DJ

14-Jun-06 2:47

Hi all,

I have a CListCtrl, which has an attached ImageList.
I set the image for an item and the image is displayed correctly. Very Well.
Now I change my project settings to releasemode, compile my application and now something strange happens:
In my ListCtrl only the first image in my ImageList is displayed, no matter, what index I specify. It works perfectly in debug-mode, but does not work in release-mode. So I can not singlestep through my application to find the error.
Since it works in debug-mode, I think, my sourcecode is correct. I copied it from a MFC book.

Can anybody tell me, where to look for differences between debug and release as far as imagelists are concerned?

Juergen

Re: ImageList in ListCtrl behaves differently in debug or release

Laxman Auti14-Jun-06 2:51

Re: ImageList in ListCtrl behaves differently in debug or release

14-Jun-06 2:51

Could you post code snipet so that we can trace the problem..??

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You can if you think you can
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e-DJ24-Jul-06 6:13

e-DJ

24-Jul-06 6:13

Ok, here is what my code looks like:

CImageList StatusImage is a member-variable in my class.

OnInitDialog()
{
	StatusImage.Create(4,12,ILC_COLOR4,5,1);

	AddBitmapToImageList(StatusImage,IDB_STATUS_PLAN);
	AddBitmapToImageList(StatusImage,IDB_STATUS_GO);
	AddBitmapToImageList(StatusImage,IDB_STATUS_CRITICAL);
	AddBitmapToImageList(StatusImage,IDB_STATUS_FINISH);
	AddBitmapToImageList(StatusImage,IDB_STATUS_STOP);
}
BOOL AddBitmapToImageList(CImageList &imageList, UINT nResourceID)
{
	BOOL bReturn;
	CBitmap bmp;
	
	bReturn=bmp.LoadBitmap(nResourceID);
	if(bReturn)
	{
		bReturn=imageList.Add(&bmp,RGB(255,255,255));
		bmp.DeleteObject();
	}
	return bReturn;
}

When I access the ImageList in debug-mode, the correct image is selected. When I access the list in release-mode, only the first bitmap is displayed.
I even debugged the release-version, but I found no errors. Everything seems to work fine. But the wrong image is displayed.

Juergen

Re: ImageList in ListCtrl behaves differently in debug or release

Naveen14-Jun-06 2:57

Naveen

14-Jun-06 2:57

e-DJ wrote:
So I can not singlestep through my application to find the error.

u can do debuging in a release version too

set the following option in project settings

take project->Setting

now take c++ tab
in the optimization combobox select Disabled
in the Debug info combo select "Program database for edit and continue"
now take the Link tab
Tick the check box "Generate debug info"

now rebuild the project

nave

How to hide the tabs in PropertyPage

si_6914-Jun-06 2:43

si_69

14-Jun-06 2:43

Hi

I have a property sheet with tabbed property pages

When the property sheet is opened up, depending on some user settings some pages
are not displayed

When the property sheet is created, i add all the pages

the in OnInitDaig, i remove the pages i dont need with

RemovePage(&m_Page1);

this works fine, if i only open the sheet up once

If i try to open again, i get an expection error on RemovePage line, it seems the second time around
the page doesnt exist, how can i check so that the second time the sheet is opened up it doesnt try to removepage which has already been removed

anyone any ideas

thanks

si

Laxman Auti14-Jun-06 2:48

14-Jun-06 2:48

si_69 wrote:
RemovePage(&m_Page1);

if(m_Page1)<br />
{<br />
  RemovePage(&m_Page1);<br />
  m_Page1=0;<br />
}<br />

and check m_Page1==0 before RemovePage API

Knock out 't' from can't,
You can if you think you can
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Naveen14-Jun-06 2:50

Naveen

14-Jun-06 2:50

A_Laxmanm_Page1=0;

i think m_Page1 is an object of class derived from CPropertyPage

in that case how can we assign like this?

nave

Laxman Auti14-Jun-06 2:57

14-Jun-06 2:57

Naveen R wrote:
in that case how can we assign like this?

Yeh, you are right..we can't
I think we can solve the problem by maintaining the flags for pages. Smile | :)

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

Naveen14-Jun-06 2:48

Naveen

14-Jun-06 2:48

si_69 wrote:
the in OnInitDaig

Where did u wrote the OnInitDialog()? .I mean in which dialog?

couldn't u keep some flags?

nave

David Crow14-Jun-06 4:07

David Crow

14-Jun-06 4:07

si_69 wrote:
When the property sheet is created, i add all the pages

the in OnInitDaig, i remove the pages i dont need with

RemovePage(&m_Page1);

I'm curious why you don't just call AddPage() for the pages you want added, rather than add them all and remove the unwanted ones.

si_69 wrote:
this works fine, if i only open the sheet up once

If i try to open again,

Does the sheet get closed or hidden? How does it get re-opened?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

CompareFileTime problems

LCI14-Jun-06 2:26

LCI

14-Jun-06 2:26

Trying to compare a date to see if it is earlier of later.
My CompareFileTime function returns junk.. 0xffffff.

FILETIME Time;
SYSTEMTIME stime;
FILETIME ftime;

GetSystemTime(&stime);
BOOL bSys = SystemTimeToFileTime(&stime, &ftime);
LONG lfiletime;
FileTimeToLocalFileTime(&FindFileData.ftCreationTime,&Time);
//Time = &FindFileData.ftCreationTime;
lfiletime = CompareFileTime(&Time, &ftime);

James R. Twine14-Jun-06 2:29

James R. Twine

14-Jun-06 2:29

0xFFFFFFFF is the same as -1, and -1 is a valid return value from that function. Are you sure you are getting the wrong result?

Peace!

-=- James

LCI14-Jun-06 2:37

LCI

14-Jun-06 2:37

Well, i check for -1, 1 or 1. In which case my algorithm totally misses the result. How would i catch it, would i have to check for 0Xffffff? Or does the computer know to equate that to -1?

Cedric Moonen14-Jun-06 2:48

Cedric Moonen

14-Jun-06 2:48

0Xffffff is the hexadecimal representation of -1. So you can simply check for -1, this is exactly the same.

Cédric Moonen
Software developer

Charting control