calling main window from a secondary dialoge - C / C++ / MFC Discussion Boards

20-Jun-02 8:59

AFAIK LoadIcon() can't, but LoadImage() can.

Well, I personaly never specify icon size, usually Windows picks the appropriate icon automatically. Hm if you feel problems try to trick a little bit:

SetIcon(AfxGetApp()->LoadIcon(IDR_ICON_DEFAULT), TRUE);
SetIcon(NULL, FALSE);	//note: use small icon from big icon

Do NOT call SetIcon() for the small icon with an icon handle if your big icon provides the small device bitmap too.

Another workaround: feed CSystemTray with an 32x32 icon which is a scaled 16x16 icon (each pixel is build by 4 identical pixel).

Hope it helps.

Printing long CString

HenrikO20-Jun-02 7:38

HenrikO

20-Jun-02 7:38

I have read the article by Chris Maunder about printing. But I'm having some problems. I would like to print plain text from a large CString. How do I know where to break the page??? I've read some articles about this but everyone is avoiding this bit.

Can someone please help a beginner ??

Regards

Henrik

Re: Printing long CString

C^hris L^osinger20-Jun-02 7:49

C^hris L^osinger

20-Jun-02 7:49

HenrikO wrote:
I've read some articles about this but everyone is avoiding this bit.

because that's the hard bit.

you essentially have to measure the page, then measure the string. if the string is too long, break it somewhere (by breaking and measuring in a loop, usually). then print the first part, page break, print the next part (or, as much of it that fits on the page) and so on.

i'm sure someone will correct me if i'm wrong... but that's the way i've always seen it done.

-c

Garbage collection, making life better - for weenies!

Image Processing - just like mom used to make.

Re: Printing long CString

HenrikO20-Jun-02 7:52

HenrikO

20-Jun-02 7:52

Thanks for your response.

Excuse me for the stupid question's I'm asking, but how to I make a page break

regards

Henrik

Re: Printing long CString

C^hris L^osinger20-Jun-02 8:02

C^hris L^osinger

20-Jun-02 8:02

CDC::StartPage and CDC::EndPage control where a page starts and ends. CDC::StartDoc and CDC::EndDoc control the overall document.

-c

Garbage collection, making life better - for weenies!

Image Processing - just like mom used to make.

Re: Printing long CString

HenrikO20-Jun-02 8:06

HenrikO

20-Jun-02 8:06

Thank You I Think this will help me alot!!!!

Best Regards

Henrik

Re: Printing long CString

Roger Allen21-Jun-02 1:39

Roger Allen

21-Jun-02 1:39

I just posted an article about this. You can find it in the printing section.

Roger Allen
Sonork 100.10016

If I had a quote, it would be a very good one.

calling main window from a secondary dialoge

SilentWarrior20-Jun-02 7:24

SilentWarrior

20-Jun-02 7:24

i want to call the main window of my sdi from a custom dialoge .. is there any way for doing it..

secondly i want to make a check such that every time when i run my software it could check the values in the database .if the data base is all empty it should call the secondary dlg first with displaying the main dlg. and if the data base has some entries then the main dlg should be called.

thanks for ure help

looking forward from all the gurus of code

Re: calling main window from a secondary dialoge

Joaquín M López Muñoz20-Jun-02 7:30

Joaquín M López Muñoz

20-Jun-02 7:30

This is not what you're asking for, but maybe you can solve your problem by calling the secondary dialog directly when needed in your app's InitInstance, right before the main window initialization.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Many threads in ATL Service

Hans Ruck20-Jun-02 7:04

Hans Ruck

20-Jun-02 7:04

I've developed an ATL service which offers an interface.
I observed the number of threads the service handles is as big as the number of CoCreateInstance/Release calls for a pointer of that interface.
It seems like the number of threads is only increasing and never decreasing. Is this true or there is a timeout for any thread?
Is it possible to have bugs in my application, despite of the fact that i didn't create any thread?

rechi

Stack overflow.

redeemer20-Jun-02 5:53

redeemer

20-Jun-02 5:53

I have some code in a button event. When i push the button an unhandled exception appears saying "Stack overflow". If i put a breakpoint in the first sentence in the button event the Stack overflow message appears anyway so it hasn't executed any code when i comes with the Stack overflow message. If i remove all the code from the button event nothing happens... what's wrong?

Re: Stack overflow.

Joaquín M López Muñoz20-Jun-02 6:30

Joaquín M López Muñoz

20-Jun-02 6:30

This is truly weird... Could you post the relevant code (the handler itself as well as the macros inserted by the MFC wizard related to it)?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Stack overflow.

redeemer20-Jun-02 6:58

redeemer

20-Jun-02 6:58

I found out what it was, i created a very large COLORREF array [1600][1200], but it didn't reach to that sentence before the stack overflow message appeared.

Execute on Windows Shutdown

Marc Richarme20-Jun-02 5:31

Marc Richarme

20-Jun-02 5:31

Hi!

Is there any way to make windows execute an app on shutdown? (something like HKCU\Software\Microsoft\Windows\Current Version\Run but for shutdown)

..or do I need to have an app running in background trapping the WM_ENDSESSION message? Dead | X|

Cheers,
Marc
_{Click to see my *real* signature}

Re: Execute on Windows Shutdown

Mike Nordell20-Jun-02 19:00

Mike Nordell

20-Jun-02 19:00

This is dependent on OS version.

For NT5+ you can do this using gpedit.msc.

Menu Item Text

20-Jun-02 5:14

How do you dynamically set menu item text? I am looking at all the ContextMenu methods, but there is no text setting methods. Any ideas?

thanks

Re: Menu Item Text

20-Jun-02 5:30

MFC example:
CMenu *pMenu = GetMenu()->GetSubMenu(0);
pMenu->ModifyMenu(2,MF_BYPOSITION | MF_STRING, NULL,"New menu item text");

Re: Menu Item Text

Brian Delahunty20-Jun-02 6:13

Brian Delahunty

20-Jun-02 6:13

You will need to use ModifyMenu().. look up your documentation on CMenu Smile | :)

"When a friend hurts us, we should write it down in the sand, where the winds of forgiveness get in charge of erasing it away, and when something great happens, we should engrave it in the stone of the memory of the heart, where no wind can erase it" Nish on life [methinks]

"It's The Soapbox; topics are optional" Shog ⁹

How do i delete a record set???

TommyKnocker20-Jun-02 4:51

TommyKnocker

20-Jun-02 4:51

i am using the odbcrecordset class from the threat:
www.codeproject.com/database/odbcrecordset.asp

but i don't know how i can delete a recordset in my database?

someone has an idea???
thanx for help!!!

tom.

Re: How do i delete a record set???

Chad Koehler20-Jun-02 5:00

Chad Koehler

20-Jun-02 5:00

What do you mean by recordset? Do you mean you want to delete all of the data that is contained in your recordset? Or do you want to delete an entire table or view?

CRecordset (which ODBCRecordset is based on) has a Delete() function, which will delete the currently selected record. You could just loop through each record and delete it from the database.

If you want to drop an entire table or view, you should use the CDatabase class. Look at the ExecuteSQL() function.

Can't i use two dimensional arrays with the new keyword?

redeemer20-Jun-02 4:44

redeemer

20-Jun-02 4:44

int horzres = GetDeviceCaps(GetDC(GetDesktopWindow()), HORZRES);
int vertres = GetDeviceCaps(GetDC(GetDesktopWindow()), VERTRES);



COLORREF *pCol = new COLORREF[horzres][vertres];

VC++ says "non-constant expression as array bound". Why can i use a non-constant expression to create a one-dimensional array but i can't use a non-constant expression to create a two-dimensional array?

Thanks in advance.

Re: Can't i use two dimensional arrays with the new keyword?

C^hris L^osinger20-Jun-02 4:54

C^hris L^osinger

20-Jun-02 4:54

ain't C++ great? Smile | :)

you'll have to do it something like this:

COLORREF ** pCol = new COLORREF *[horzres];
for (int i=0;i<horzres;i++)
  pCol[i] = new COLORREF[vertres];

-c

Garbage collection, making life better - for weenies!

Image Processing - just like mom used to make.

Re: Can't i use two dimensional arrays with the new keyword?

Joaquín M López Muñoz20-Jun-02 6:46

Joaquín M López Muñoz

20-Jun-02 6:46

The reason is that vertres must be a compile-time constant. Eg. the following would work:

int horzres = GetDeviceCaps(GetDC(GetDesktopWindow()), HORZRES);
const int vertres = 600;
COLORREF (*pCol)[vertres] = new COLORREF[horzres][vertres];

But of course this is not what you want. Solutions:

Follow Chris' advice and construct an array of arrays. This complicates the destruction code, though.

Use a one-dimensional array and index it like follows:

COLORREF *pCol = new COLORREF[horzres*vertres];
pCol[h*vertres+v]; // eq. to pCol[h][v]

Use a std::vector<std::vector<COLORREF> >.The construction code is as complicated as in 1, but at least you get automatic cleanup.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Can't i use two dimensional arrays with the new keyword?

redeemer20-Jun-02 8:44

redeemer

20-Jun-02 8:44

wait a min Smile | :)

Why an ID in CreateThread()?

20-Jun-02 4:38

Does somebody know whatfor is LPDWORD lpThreadId in Win32 CreateThread()?

MSDN says: lpThreadId, Pointer to a variable that receives the thread identifier.

I wonder, I get back a handle from CreateThread() which I use for closing/suspending etc, why do I need an additional identifier?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.