C / C++ / MFC

14-Nov-07 3:24

gb_my wrote:
i want to save the date from Date time picker to a record.

Records are read-only devices. Cool | :cool:

gb_my wrote:
what can i do for that

Have you extracted the date/time from the control using the DTM_GETSYSTEMTIME message or GetTime() method?

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DoModal not returning.

Mr Simple14-Nov-07 2:32

Mr Simple

14-Nov-07 2:32

Hi,
I have created a 'please wait' dialog which is loaded when a user clicks on a button. A new thread is launched to load the button so the main thread can continue what it is doing.

The button code;

CPleaseWait *dlgWait = new CPleaseWait(this);<br />
AfxBeginThread(PleaseWaitThread, dlgWait);

Then in the new thread;

<br />
CPleaseWait dlg = (CPleaseWait*)lpParam;<br />
dlg.DoModal();<br />
<br />
return 0;

It is very simple code, which I have had working before.

The problem is that when called, DoModal never returns, so the dialog doesnt get displayed (it doesnt get as far as InitDialog). The main thread continues running however.

If I place a 'return;' directly after the AfxBeginThread() then the dialog DOES display. If I place 'while(1) Sleep(100);' (or any other code) after the AfxBeginThread() then it does not return.

I have narrowed the problem down to a particular line (510) within 'dlgcore.cpp'

// disable parent (before creating dialog)<br />
HWND hWndParent = PreModal();<br />
AfxUnhookWindowCreate();<br />
BOOL bEnableParent = FALSE;<br />
if (hWndParent && hWndParent != ::GetDesktopWindow() && ::IsWindowEnabled(hWndParent))<br />
{<br />
::EnableWindow(hWndParent, FALSE); /////// <--- THIS HANGS FOREVER<br />
    bEnableParent = TRUE;<br />
}

Creating a modeless dialog does not fix the problem - Create() does not reurn instead.

Does anyone have any ideas as to what the problem could be?
Please advise.
Thank you!

Roger Broomfield14-Nov-07 3:01

14-Nov-07 3:01

You're using a worker thread to create a user interface object?

Personally I dont see the need for a thread at all.

On Button Click:
Disable the main window.
Create and show a modeless please wait dialog.
Do work.
Destroy the modeless please wait dialog.
Enable the main window.

Nelek14-Nov-07 3:03

Nelek

14-Nov-07 3:03

I think you are mixing the parent between threads, what about having the new CPleaseWait with (NULL) ??

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

Wink | ;)

KarstenK14-Nov-07 3:14

KarstenK

14-Nov-07 3:14

Your Thread Dialog wants to disable the main dialog. Unsure | :~

There can be only one modal dialog per Thread. -> Parent = NULL or modeless Dialog (tip: with new and self destruction)

Greetings from Germany

David Crow14-Nov-07 3:15

14-Nov-07 3:15

Mr Simple wrote:
CPleaseWait dlg = (CPleaseWait*)lpParam;
dlg.DoModal();

This looks odd. Try:

CPleaseWait *dlg = (CPleaseWait *) lpParam;
dlg->DoModal();

Mr Simple14-Nov-07 5:37

Mr Simple

14-Nov-07 5:37

Thanks folks.

Using "new CPleaseWait(NULL);" didn't fix the problem, oh, and I was using dlg->DoModal (as opposed to .DoModdal) it was a typo as the machine I am coding on isnt networked Smile | :)

I ended up using the modeless after disabling the main form, as suggested.

I have another question, not too important anymore, but would be handy to know. Inside the InitDialog() I had a new thread which alters the contents of a label to show the search hasnt crashed. It has worked before in the old application (I have just realised that the old problem didnt exist then as it was being used as a splash screen when the app was started, hence no parent). Now, the 'SetWindowText()' to update the label runs once, then doesnt return the second time. I cant look any further into it as no code is available for debugging (other than assembly) meaning it is quicker for me to delete that bit Smile | :)

Like i say, its not important now, but any ideas?

Thanks for the help everyone, I had been staring at those lines of code for hours!

how to use Date Time picker control

Nelek14-Nov-07 20:07

Nelek

14-Nov-07 20:07

Hi,

I had problems with something similar in one project. I was using static labels to show variable datas. It worked good sometimes, but not as I wanted. So I changed them with Edits, set the protection to write and erase the border (all in resource editor), then just calling SetWindowText was enough and never failed.

BTW, are you erasing the background before sending the message to update screen?

gb_my14-Nov-07 0:51

gb_my

14-Nov-07 0:51

i want to save the date from Date time picker to a record.

what can i do for that

Re: how to use Date Time picker control

Roger Broomfield14-Nov-07 1:01

Remove toolbar button border in release mode

14-Nov-07 1:01

SYSTEMTIME st;<br />
SendMessage(hwndDateTime,DTM_GETSYSTEMTIME,(WPARAM)0,(LPARAM)(LPSYSTEMTIME)&st);

then you have to figure out what format your "record" uses for storing date/time and convert to that and store it

NTFS junction point

LiveShell14-Nov-07 0:50

LiveShell

14-Nov-07 0:50

Hi all,
I have created the junction point by creating mountpoint in empty NTFS
folder option from ComputerManagement--->DiskManagement , right clicking on the
volume.

it goes like this: my destination volume drive is g: and source is C:\UNC

I am running windows service which removes the destination volume (that is the
removable drive) using DeleteVolumeMountPoint() , but it only ejects the
destination drive (ie removable drive) , the c:\unc is still available and can
be accessible. Can any body help me out how to delete that also. If I select the
"Eject" option by selecting removable drive (from
ComputerManagement--->DiskManagement ) then c:\unc also becomes unavailable....

Thnx in advance
LiveShell

Media files

zakkas248314-Nov-07 0:49

zakkas2483

14-Nov-07 0:49

How to know programmatically that Media file having audio content or not same as video content or not.

Thank you,

Hiren Thakkar.

Re: Media files

Matthew Faithfull14-Nov-07 3:40

Matthew Faithfull

14-Nov-07 3:40

If you're starting out without any idea about the file, no file extension for example, then you'd have to parse the headers on the front of the file using a parser/recognizer capable of distinguishing different formats. The detailed format information of the format used will then contain information like what is in the file, details of audio and video streams, encoding, compression, encryption, authorship etc. There is no single standard format for media files or their headers so you need to know what you're looking for. You occasionally come across files that are completely raw, i.e. no header at all and you can't use then unless you happen to know the exact format, eihter by the association of the file with a particular application or by its extension. Most files though will have a valid header and many header layouts will be publically available.

Nothing is exactly what it seems but everything with seems can be unpicked.

cagespear14-Nov-07 0:11

cagespear

14-Nov-07 0:11

I have an MFC app which creates toolbar using sectoolbarmgr. We have written a wrapper over secframewnd which to be used as frame.

My problem is - the toolbar looks absolutely fine when seen in debug build. But in Release build, each toolbar button has an ugly green/blue colored border around it.

Is there any way to suppress this un-needed toolbar button border ?

Thanks
Cage

can any body tell me how to fetch the text from the list control

Deepu Antony13-Nov-07 23:44

Deepu Antony

13-Nov-07 23:44

im using the list control for displaying certain information.When i click on any rows in a particular column i want the text to be fetched.

Can anybody help me out

Thanks in Advance

Re: can any body tell me how to fetch the text from the list control

chandu00413-Nov-07 23:47

chandu004

13-Nov-07 23:47

did you try GetDlgItemText(IDC_LIST1);

Re: can any body tell me how to fetch the text from the list control

Deepu Antony13-Nov-07 23:58

Deepu Antony

13-Nov-07 23:58

thanks for your reply.

I tried like the

1.with the click function of the list control i tried the way you told
GetDlgItemText(IDC_LIST1,variable);

but the value returned to the variable is LIST1.

is there any events for capturing the text in list control.like i saw one for capturing the entire row if i click on it

Re: can any body tell me how to fetch the text from the list control

ThatsAlok14-Nov-07 0:29

ThatsAlok

14-Nov-07 0:29

Deepu Antony wrote:
GetDlgItemText(IDC_LIST1,variable);

CListBox::GetText

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cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: can any body tell me how to fetch the text from the list control

David Crow14-Nov-07 3:28

Re: can any body tell me how to fetch the text from the list control

14-Nov-07 3:28

ThatsAlok wrote:
CListBox::GetText

For a list control?

ThatsAlok14-Nov-07 3:48

ThatsAlok

14-Nov-07 3:48

DavidCrow wrote:

ThatsAlok wrote:
CListBox::GetText

For a list control?

Sorry my Mistake, it should be CListCtrl::GetItemText

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: can any body tell me how to fetch the text from the list control

Hamid_RT14-Nov-07 6:32

Hamid_RT

14-Nov-07 6:32

Of course I think you show that your answer is CListBox.;P

ThatsAlok wrote:
CListBox::GetText

Re: can any body tell me how to fetch the text from the list control

Roger Broomfield14-Nov-07 0:45

Re: can any body tell me how to fetch the text from the list control

14-Nov-07 0:45

Well, because you mention columns, presumably you are dealing with a ListViewControl and not a ListBox, so try something like this:

TCHAR pszText[_MAX_PATH];<br />
LVITEM lvi = { 0 };<br />
lvi.mask = LVIF_TEXT;<br />
lvi.pszText = pszText;<br />
lvi.cchTextMax = _MAX_PATH;<br />
lvi.iItem = 0;  // put the row number here<br />
lvi.iSubItem = 0;  // put the column number here<br />
SendMessage(hwndList,LVM_GETITEM,(WPARAM)0,(LPARAM)(LPLVITEM)&lvi);

lvi.pszText may not be still pointing to pszText upon return.

David Crow14-Nov-07 3:27

Re: can any body tell me how to fetch the text from the list control

14-Nov-07 3:27

Roger Broomfield wrote:
...you are dealing with a ListViewControl and not a ListBox...

Wasn't that much obvious from the subject?

Roger Broomfield14-Nov-07 3:45