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Re: shortsighted design - so can I do this now?

Jason Henderson15-Aug-02 2:55

Jason Henderson

15-Aug-02 2:55

void MClass::Open()
void MClass::Open(int i)
void MClass::Open(char c)

Are different functions of the same class with the same name but having different parameters. This is called function overloading.

Jason Henderson
_{quasi-homepage}
^articles
_{"Like it or not, I'm right!"}

Re: shortsighted design - so can I do this now?

Todd Smith13-Aug-02 18:37

Todd Smith

13-Aug-02 18:37

Why not rename Open to something more descriptive and change our code? Then add another function for your 2nd query.

Use something like QueryCustomers and QueryProducts instead of Open and Open2.

Todd Smith

Re: shortsighted design - so can I do this now?

ns14-Aug-02 3:00

14-Aug-02 3:00

Good idea! I'm just so glad I could extend my class. Appreciate your advice.
Thanks,
ns

Default debugger

Jon Sagara13-Aug-02 15:13

Jon Sagara

13-Aug-02 15:13

How can I change the default debugger?

Thanks,

Jon Sagara

"Bugs suck. Period."
-- John Robbins

Re: Default debugger

Jason Henderson13-Aug-02 16:07

Jason Henderson

13-Aug-02 16:07

If you are refering to the app that is launched when you get an error and you tell it to debug, look up AeDebug on MSDN. Its a registry entry.

Jason Henderson
_{quasi-homepage}
^articles
_{"Like it or not, I'm right!"}

2 simple problem, guys, gotta help me!

BlackSmith13-Aug-02 14:18

BlackSmith

13-Aug-02 14:18

1.
I've CEdit and a CButton on a CDialog. The CButton placed on top of the
CEdit. When the CButton is dragged up/down, I wish the CEdit will
streach/shrink, corresponding to the CButton bottom coordinate.

CAN SOMEONE LINK ME TO SOME ARTICLE THAT CAN RESOLVE MY ISSUE Confused | :confused:

2.
An article dealing with HOWTO create non-cubical windows/controls (please?)

10XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX a lot

--BlackSmith--

"With the help of all mighty", 2001, Me.

Re: 2 simple problem, guys, gotta help me!

Ravi Bhavnani13-Aug-02 14:36

Ravi Bhavnani

13-Aug-02 14:36

See the Owner Drawn Buttons section at this[^] page.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: 2 simple problem, guys, gotta help me!

Roman Fadeyev13-Aug-02 20:14

Roman Fadeyev

13-Aug-02 20:14

use ownerdraw buttons for non-rectangular buttons and use WinAPI functions

CreatePolygonRgn
SetWindowRgn
etc.

for creating windows with arbitrary shape

merging STL sets

moredip13-Aug-02 13:32

moredip

13-Aug-02 13:32

quick, easy question:

how do I merge two std::set<ulong> sets into one?

for example:

std::set<ULONG> Aset;
std::set<ULONG> Bset;
...
...
//fill sets with exciting numbers
...
...
Aset.merge( Bset );

I'm guessing I don't have to do it by hand (iterate BSet, adding all elements to ASet).

TIA,

Pete

Re: merging STL sets

Christian Graus13-Aug-02 14:42

Christian Graus

13-Aug-02 14:42

use std::copy with a back_inserter, I would have thought.

Christian

We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )

Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002

Re: merging STL sets

moredip14-Aug-02 9:18

moredip

14-Aug-02 9:18

Didn't work, but that could have been me calling it wrong.

I ended up doing it by hand:

for( set_it = Bset.begin(); set_it != Bset.end(); set_it++ )
    Aset.insert( set_it );

which does the job I guess...

Thanks anyway Christian

Add a Bitmap to a Button.

WREY13-Aug-02 13:30

WREY

13-Aug-02 13:30

The standard, (and perhaps, the most common) way seems to be that if you want to create a bitmap button, you'd embed a CMyBitmap class object inside the view or the dialog, and from inside the definition of CMyBitmap you'd use LoadBitmapEx to load the bitmap, followed by using the SetBitmap function from CButton. (At least that's how I have been doing it.)

Then, I discover this book where the author totally seemed to avoid that path, and instead, embedded a CBitmapButton object inside the dialog, called Autoload from inside OnInitDialog to load his bitmap, and that was it. It worked!

However when I tried to emulate his technique, I have no success story to deliver. I didn't work for me.

Does anybody know what the author may have done to make his technique work, but didn't for me?

His name is Keith Bugg, and the book is, "Building Better Interfaces with MFC." His sample was part of Example 1.

Thanks.

William

Re: Add a Bitmap to a Button.

C^hris L^osinger13-Aug-02 14:12

C^hris L^osinger

13-Aug-02 14:12

is this anything like the CBitmapButton class that comes with MFC ?

-c

Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten

image effects!

Re: Add a Bitmap to a Button.

Ravi Bhavnani13-Aug-02 14:38

Ravi Bhavnani

13-Aug-02 14:38

Yep. But it's pretty clunky, um... basic.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Add a Bitmap to a Button.

WREY14-Aug-02 1:04

WREY

14-Aug-02 1:04

Interestingly, David Kruglinski, George Shepherd and Scott Wingo, on page 264 of their book, "Programming Microsoft Visual C++: Fifth Edition" shows something similar to what the other author whom I was talking about, had done.

CBitmapButton m_editCopy;
CBitmapButton m_editCut;
CBitmapButton m_editPaste;

BOOL CAboutDlg::OnInitDialog()
{
CDialog::OnInitDialog();
Verify(m_editCopy.AutoLoad(IDC_BUTTON1, this));
Verify(m_editCut.AutoLoad(IDC_BUTTON2, this));
Verify(m_editPaste.AutoLoad(IDC_BUTTON3, this));

return TRUE;
}

And they showed an illustration of a dialog window with the three Bitmap buttons. It obviously had to work for them also.

It got to be something else that they are doing, because the technique is not working for me.

Confused | :confused:

William

app fails to load double-clicked file

Jake Palmer13-Aug-02 13:10

Jake Palmer

13-Aug-02 13:10

When I double click on a file whose extension is handled by my MDI app, it starts to run the app but doesn't show the MainFrame properly (the floating dialogbar appears, but no main window or anything).
I get an error saying "Cannot find the file ... Make sure the path and filename are correct and that all required libraries are available."
I think these might be two separate problems, because when I click OK on the error message the half-opened application remains.

The same thing happens when another instance of the app is running. I'm not trying to do anything tricky here, like open the file in the same instance, which just seems too difficult. I've found similar postings on this forum but nothing that helps here.
thanks,
Jake

Re: app fails to load double-clicked file

jmkhael13-Aug-02 13:48

jmkhael

13-Aug-02 13:48

Did u serialize ur data?

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: app fails to load double-clicked file

Jake Palmer13-Aug-02 14:01

Jake Palmer

13-Aug-02 14:01

Yes, if I run the app normally and load in the file, everything works fine. Drag and drop also works fine. The only problems occur when double-clicking on files.
Jake

Re: app fails to load double-clicked file

jmkhael13-Aug-02 14:11

jmkhael

13-Aug-02 14:11

Does ur application name or path contains space characters?

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

Exporting Data

Peter Liddle13-Aug-02 13:06

Peter Liddle

13-Aug-02 13:06

Hey guys

I have been desperately trying to export data (just varibles) from an executable and load them into a DLL but i can't get it to work so far i have tried extern and __declspec(dllexport) and dllimport. But i have had no luck any ideas on how i do this.

Peter

Re: Exporting Data

Ancient Dragon13-Aug-02 14:39

Ancient Dragon

13-Aug-02 14:39

You can't do that. You can only export objects from a DLL to an executable or another dll.

Re: Exporting Data

Peter Liddle13-Aug-02 22:32

Peter Liddle

13-Aug-02 22:32

Yeah but i really really need to do it

is there no way to work around it

Re: Exporting Data

Ancient Dragon14-Aug-02 0:26

Ancient Dragon

14-Aug-02 0:26

Create the exported object in the dll, then in the application change its value. There is NO other way to do it. The reason should be obvious -- if the application were allowed to export and object, then the application would always have to be running whenever the dll is running. Lets say you have A.exe that export and object which X.dll uses. B.exe also uses X.dll but has no need for the object. When B.exe runs, X.dll is brought into memory, and because the dll references the object that was exported by A.exe, A.exe must also be executed.

One of the purposes of a dll is to share its data and functions among many different applications. It would be terribly inefficnent to do it the other way around.

Dynamic memory allocation - Best Practices.

djrisc13-Aug-02 12:43

djrisc

13-Aug-02 12:43

Trying not to make any assumptions, I have been making my code so that strings retrieved from edit controls, the registry, etc dynamically allocate the space needed.

In my code I have been doing things such as this all over the place:

<br />
_TCHAR* pszString = NULL;<br />
int iLen = 0;<br />
<br />
iLen = SendDlgItemMessage(hWnd, IDC_EDITCNTRL, EM_LINELENGTH, (WPARAM)0, (LPARAM)0); // Get length of the string.<br />
iLen++; // Add space for null termination.<br />
pszString = new _TCHAR[iLen]; // Allocate the space needed.<br />
ZeroMemory(pszString, iLen); // Clean out the buffer.<br />
*(WORD *)pszString = iLen;  // Set the first Word to the size of the buffer.<br />
SendDlgItemMessage(hWnd, IDC_EDITCNTRL, EM_GETLINE, (WPARAM 0, (LPARAM)pszString); // Fill the buffer.<br />
<br />
// use our new string pointer for whatever..<br />
<br />
delete []pszString; // Nuke the buffer.<br />
<br />

This is of course just example code, but is the most optimized way to go about allocating the space for strings dynamically? I'm just curious how most people go about this in Windows.

Thanks!

. djrisc .

Re: Dynamic memory allocation - Best Practices.

Bill Wilson13-Aug-02 13:03

Bill Wilson

13-Aug-02 13:03

I've never seen anythging like this. Its much more sophisicated than I'm used to. Most code I've seen (and written for that matter) just allocates a large buffer and uses GetDlgItemText, letting the extra space (if any)just lie there.

I don't know if it is the most optimized, but it looks like it is considerably more efficient than the norm!

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