Re: Stay On Top - Advice Needed - C / C++ / MFC Discussion Boards

Re: CRect constructor-beginner question

7stud18-Aug-03 11:22

7stud

18-Aug-03 11:22

Thanks for the replies.

I'm not sure how the copy constructor is involved. My book says:

The copy constructor is called when a class object is created and initialized with an existing object of the same class, or when an object is passed to a function by value.

m_EnclosingRect isn't being created in the line in question.

Re: CRect constructor-beginner question

Neville Franks18-Aug-03 11:30

Neville Franks

18-Aug-03 11:30

It was around 6.40am when I replied and my brain had quite kicked into gear, and probably still hasn't. Smile | :)

David was closer. The constuctor instantiates a CRect and the assignment operator copies it.

Neville Franks, Author of ED for Windows. Free Trial at www.getsoft.com

Re: CRect constructor-beginner question

Michael Dunn18-Aug-03 11:51

Michael Dunn

18-Aug-03 11:51

Writing CRect(Start, End) calls that CRect ctor to create a new CRect object. This object will get destroyed at the end of the statement.
The = uses the CRect assignment operator (not the copy constructor) to assign that new CRect object into m_EnclosingRect. The implementation of the assignment operator is usually similar/identical to that of the copy ctor, so the end result is that m_EnclosingRect gets a copy of that new CRect object.

--Mike--
Ericahist | Homepage | RightClick-Encrypt | 1ClickPicGrabber
Latest art~!@#2rDFA#@(#*%$Rfa39f3fqwf--=
NO CARRIER

Re: CRect constructor-beginner question

7stud19-Aug-03 18:01

7stud

19-Aug-03 18:01

Thanks for the detailed explanation.

Stay On Top - Advice Needed

Norman Bates18-Aug-03 10:26

Norman Bates

18-Aug-03 10:26

I have an application that allows users to select "stay on top"...however if another application presents a message box (crital error for example), I'd like to trap that and force that message box into the foreground...does anyone have advice on the best way to implement such a feature?

TIA!

Regards,
Norm Confused | :confused:

Re: Stay On Top - Advice Needed

valikac18-Aug-03 11:54

valikac

18-Aug-03 11:54

Interesting. How do you going to determine a normal message box from one that conveys "critical error?"

Kuphryn

Re: Stay On Top - Advice Needed

Hosam Aly Mahmoud18-Aug-03 12:04

Hosam Aly Mahmoud

18-Aug-03 12:04

I hope I will not waste your time. I am a beginner and had never tried making my window on top, but I think that you do it by setting the window's style. I have an idea, but I do not know whether it is correct or applicable. If an application presents a message box, then your application will lose focus. May be you could handle WM_KILLFOCUS (or OnKillFocus()) and test the window getting focus for its style. If the style contains on top (and maybe message box style), put it somehow in front of your app (I think you would need to change your app's Z-order to make it after the message box).

Hope this helps, and sorry for anything wrong I may have said.

Hosam Aly Mahmoud

Re: Stay On Top - Advice Needed

Hosam Aly Mahmoud18-Aug-03 12:27

Hosam Aly Mahmoud

18-Aug-03 12:27

As I tried to look it up, I saw that you may be able to handle it as follows:

case WM_KILLFOCUS:
   if ( wParam != 0 )
   {
      WINDOWINFO wi;
      GetWindowInfo( (HWND)wParam, &wi ); // sorry, did not check for errors
      if ( (wi.dwExStyle & WS_EX_TOPMOST) == WS_EX_TOPMOST )
      {
         SetWindowPos( (HWND)wParam, HWND_TOP,
            0, 0, 0, 0, // ignored
            SWP_NOMOVE | SWP_NOSIZE |
            SWP_NOOWNERZORDER | SWP_NOSENDCHANGING );
      }
   }
   return 0;

Hope this helps (and hope I am not wrong!).

Hosam Aly Mahmoud

Re: Stay On Top - Advice Needed

Norman Bates19-Aug-03 0:53

Norman Bates

19-Aug-03 0:53

Thanks, just what I needed!

I'll check the wi.dwStyle for WS_POPUP or WS_POPUPWINDOW and if that window's RECT intersects my window will set the appropriate Z-Order for these two windows.

best regards,
norm

Re: Stay On Top - Advice Needed

Hosam Aly Mahmoud19-Aug-03 5:03

Hosam Aly Mahmoud

19-Aug-03 5:03

I am happy it worked! Big Grin | :-D

Hosam Aly Mahmoud

CDataGrid is not in MSDN

sdfdsfa18-Aug-03 10:24

sdfdsfa

18-Aug-03 10:24

I am trying to figure out this class, but
seems like this CdataGrid is not in MSDN.
I already installed subscription upto 2001,
still no luck. Anyone with the same problem
able to found the solution?

shin

Re: CDataGrid is not in MSDN

David Crow18-Aug-03 10:50

David Crow

18-Aug-03 10:50

That's probably because it is not a Microsoft class.

http://www.codeproject.com/useritems/datagrid.asp

Installing Visual Studio .NET 2003

Rohde18-Aug-03 10:21

Rohde

18-Aug-03 10:21

Hi,

Sorry if this is the wrong forum to be asking this Frown | :(

Anyway, I'm going to install Visual Studio .NET 2003. I have Visual Studio .NET (ver. 7) installed already. Should I uninstall it and the framework before installing the newer version?

Thanks..;P

Re: Installing Visual Studio .NET 2003

valikac18-Aug-03 11:56

valikac

18-Aug-03 11:56

The answer depends on whether you still want to use version 7. I recommend uninstalling version 7 before installing .NET 2003.

Kuphryn

Assertion error due to imagelist

Binayak18-Aug-03 9:07

Binayak

18-Aug-03 9:07

Hi,

I’m initializing the dialog in my MFC application from the parent window as follows:

In TreeView.cpp,

void CMyTreeView::OnDraw(CDC* pDC)
{
/**/
CMfcTree dlg;

int ret = dlg.DoModal();

}

In MfcTree.cpp OnInitDialog() is as follows,

BOOL CMfcTree::OnInitDialog()
{
CDialog::OnInitDialog();

m_ImageList.Create(IDB_BITMAP1, 13, 12, RGB(255,255,255));

HTREEITEM hItem = m_nTree.InsertItem( "Root", 0,2,TVI_ROOT );
m_nTree.SelectItem (hItem);
m_nTree.SetImageList(&m_ImageList, TVSIL_NORMAL);
m_nTree.SetItemState(hItem, TVIS_BOLD, TVIS_BOLD );

//sets the background color

m_nTree.SetTextColor(RGB(0, 0, 0));

m_nTree.SetBkColor(RGB(255, 255, 255));

……………………………….
………………………………..

}

If I try to move the dialog I keep getting this error:
Debug assertion failed.
And it points to ASSERT(m_hImageList == NULL); in the winctrl2.cpp.

It has something to do with the line m_ImageList.Create(IDB_BITMAP1, 13, 12, RGB(255,255,255));

Please advise. I’m really frustrated with this error.

Binayak

can't get the debugger to work in visual studio .net

trustno118-Aug-03 9:01

trustno1

18-Aug-03 9:01

hi,

i'm programming an opengl program using visual studio .net. my project uses standard windows library(no mfc or atl). when i try to set a break point on a variable or a function, i keep on getting the error message "intellisense couldn't not find the specific location". does anyone know how to set the break point properly?

also, what file do i need to include in my project in order to use the "TRACE" function? is there a way to redirect printf's output to visual stuio .net's "output" panel/window?

thanx in advance.

File Tree Control???

Bob Stanneveld18-Aug-03 8:59

Bob Stanneveld

18-Aug-03 8:59

Hello,

I Created a dialog which allows a user to select directories. I now have to code the tree control in which the directories appear. Is there a simple way to do this or do I have to handcode it all?

thanks

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.

Re: File Tree Control???

Shay Harel18-Aug-03 9:12

Shay Harel

18-Aug-03 9:12

try this articlr, I used this class for a while and it's great

http://www.codeproject.com/dialog/selectfolder.asp

Re: File Tree Control???

Bob Stanneveld19-Aug-03 2:48

Bob Stanneveld

19-Aug-03 2:48

Thanks, but thats not excactly what I meant. It's hard to find an example, but I'm looking for one...

I'll describe the tree control in detail:
It contains the directories like the left splitter of the explorer.
It has check boxes so you can select directories,...

If I can get my hand on a picture or something, I'll post it.

thanks in advance.

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.

how to maximize the window of SDI project

mr200318-Aug-03 8:26

mr2003

18-Aug-03 8:26

Hi,
I would like to know how to maximize the window of a SDI project upon the excution of it..

Ehsan Behboudi

Re: how to maximize the window of SDI project

Bob Stanneveld18-Aug-03 8:54

Bob Stanneveld

18-Aug-03 8:54

Hello,

Add the WS_MAXIMIZE to the window style! If you are using MFC you should modify the CREATESTRUCT in the PreCreateWindow() function.

hope this helps

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.

Re: how to maximize the window of SDI project

David Crow18-Aug-03 8:55

David Crow

18-Aug-03 8:55