C / C++ / MFC Discussion Boards

Re: Getting Assert error with CFileDialog::DoModal

Alvaro Mendez12-Dec-02 9:30

12-Dec-02 9:30

OK, here's one last stab at this issue.

Is the dialog box being created in a separate thread? If so, is it using a parent window which was created in a different thread? This may be the problem. MFC does not support related windows being created accross different threads -- I forgot exactly why, but someone here may shed some light.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Win2K not drawing rectangle

Shay Harel12-Dec-02 4:17

Shay Harel

12-Dec-02 4:17

Hi All !

I have this piece of code working fine on NT but drwas nothing on Windows 2000, any idea. Basically, it draws a rectangle on a dialog.

<br />
CClientDC dc (dlg);	//get our device context<br />
dlg->GetClientRect (&rect);		//get the pointer to our window<br />
CBrush brush (RGB (192,192,192));<br />
dc.SelectObject(&brush);<br />
					<br />
dc.Rectangle(x_base+(d*20),y_base+(c*30),x_base+20+(<br />

Re: Win2K not drawing rectangle

retZ12-Dec-02 4:37

retZ

12-Dec-02 4:37

i just ran that piece of code on Win2k and works fine..i tested with coordinates (0,0,100,100)..
just check ur co-ordinates ie [dc.Rectangle(x_base+(d*20),y_base+(c*30),x_base+20+(]

may the co-ordinates are just not "inside" the dialog..

There are no failures; there are only extended learning opportunities.

Re: Win2K not drawing rectangle

Shay Harel12-Dec-02 4:46

Shay Harel

12-Dec-02 4:46

They are inside because when I run the same code on NT, I see them, so this is funny...

Thank you anyways !

Re: Win2K not drawing rectangle

retZ12-Dec-02 5:17

retZ

12-Dec-02 5:17

wait a minute ! hope i am not confusing u here..its been a long time since i had worked on such stuff..
could it be due to screen resolution..because of things like screen co-ordinates or client co-ordinates..ohhhh i am so forgetful...

There are no failures; there are only extended learning opportunities.

Re: Win2K not drawing rectangle

generic_user_id12-Dec-02 5:54

generic_user_id

12-Dec-02 5:54

In that case using ScreenToClient() should solve it.

Regards,

Griffith

Everything you say will be misquoted, ripped out of context and used against you.

Window not updating entirely

jimNLX12-Dec-02 3:30

jimNLX

12-Dec-02 3:30

I wrote this dialog app and after it runs for awhile it just stops updating all the objects on the screen. What I mean by not updating is that some of the object just stop appearing or are only drawn partially. I have many pages in this dialog and they mostly just have large buttons on them. I'm not calling wm_paint or messing with any of the draw functions, I have just let Windows handle that.

Also, I noticed that some of the drop downs instead of having a down arrow it will display a "6".

Any idea on how I can make sure that everything gets drawn on the screen?

Re: Window not updating entirely

retZ12-Dec-02 4:43

retZ

12-Dec-02 4:43

i am not really sure of the answer..just a guess..
Could you check if ur app is leaking memory..could u check the taskmanager to see ur app's mem utilization ?

There are no failures; there are only extended learning opportunities.

Re: Window not updating entirely

valikac12-Dec-02 8:01

valikac

12-Dec-02 8:01

Make sure that the application is not storing huge amount of data in memory and continue adding more data. The program could have memory leaks.

Check task manager and make sure the size of the process in more is consistant and does not increase dramatically.

Kuphryn

Re: Window not updating entirely

Alvaro Mendez12-Dec-02 8:24

Alvaro Mendez

12-Dec-02 8:24

It looks to me like a resource leak, but you say you're not using the GDI functions. Are you sure about this? Maybe it's not your code but someone else could have added drawing functionality in there you don't know about.

Another idea that comes to mind is if your app opens and closes the dialog but does not properly destroy it whenever it gets closed. In other words, it may look like it's gone, but it remains hidden and the resources are not released.

That's all I can offer. Good luck!

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Re: Window not updating entirely

jimNLX12-Dec-02 8:29

jimNLX

12-Dec-02 8:29

These all sound like good suggestions. I have been running some test to see if memory changes significantly, but haven't seen this happen.

On all of the dialogs that are called I do a delete() when I close them. I've check and every page is done this way.

Is a particular area I can look at in the debugger to see what is going on?

Thanks...

Re: Window not updating entirely

Alvaro Mendez12-Dec-02 9:36

Alvaro Mendez

12-Dec-02 9:36

Well, MFC has a built-in mechanism for reporting memory leaks when the app exits from the debugger. In other words, run the app inside the debugger (F5), use it for a while, and the exit out of it. If there are memory leaks, you'll get a listing on the Output window showing you the locations of where memory was allocated which was never freed.

Also, you say you do a delete() when you close your dialog boxes. Why? Can you show some sample code of how you're creating/destroying your dialog boxes?

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

ResumeThread not Resuming?

RobJones12-Dec-02 3:11

RobJones

12-Dec-02 3:11

Hello,
I posted a question yesterday about loggin a text fle from with in a UI Thread.. Anyway, I started logging all the threads actions all the way up to ExitThread and found no problems at all.. I think my problem is that I create the thread and some times the ResumeThread doesn't really resume the thread. It gets created then it sits there. Which causes a bunch of extra threads that are on my process doing nothing.. Is there anyway to ensure that the thread has resumed and if not just kill it?

Heres an example of how I am starting up the threads...

n = 10;	
while(n > 0)
{
	CConnectThread* thread = (CConnectThread*)AfxBeginThread(RUNTIME_CLASS(CConnectThread),
								THREAD_PRIORITY_NORMAL,
								0, // stack size
								CREATE_SUSPENDED);
	// Set the thread vars.. then resume the thread.
	thread->m_strMessage = strMessage;
	thread->m_strDns = strDns;
	thread->m_iPort = iPort;
	thread->m_bAutoDelete = TRUE;
	thread->ResumeThread();
	n --;
}

Thanks,
Rob

Re: ResumeThread not Resuming?

Arjan Schouten12-Dec-02 3:25

Arjan Schouten

12-Dec-02 3:25

Check the return value from ResumeThread!

DWORD ResumeThread( );

Return Value

The thread’s previous suspend count if successful; 0xFFFFFFFF otherwise. If the return value is zero, the current thread was not suspended. If the return value is one, the thread was suspended, but is now restarted. Any return value greater than one means the thread remains suspended.

van padoea

Re: ResumeThread not Resuming?

RobJones12-Dec-02 4:18

RobJones

12-Dec-02 4:18

Thanks for the fast reply.. I should have looked for a return value Blush | :O

before posting..

Thanks again,
Rob

How can I get the current line of a xml element / node ?

Daniel Strigl12-Dec-02 2:59

Daniel Strigl

12-Dec-02 2:59

How can I get the current line of a xml element / node ?

What I mean is the current line of a xml node / element in the xml file, like the get_line() function of the IXMLDOMParseError return.

I read some attributes of a xml node / element and check if they are in the possible range (eg. - 100 < attribute < +100). If the attribute is not in the range I want to display an error with the line, where I read the attribute / node / element!

I am working with the MSXML DOM parser!

Daniel Wink | ;)

---------------------------
Never change a running system!

Re: How can I get the current line of a xml element / node ?

Ranjan Banerji12-Dec-02 7:48

Ranjan Banerji

12-Dec-02 7:48

No you cannot do that (or at least I think you cannot). Basically the XML is just a string. It may or may not have carriage returns. Both are valid. The well formatted XML you see in your editor is a display and not necessarily the actual XML text.

So:
<SAMPLE>
<BLAH>jhgjsdgf<BLAH/>
<BLAH2>jhgjsdgf<BLAH2/>
</SAMPLE>

Is the same as

<SAMPLE><BLAH>jhgjsdgf<BLAH/><BLAH2>jhgjsdgf<BLAH2/></SAMPLE>

You can get position() but that will simply tell you the element position within the current collection. If you nodes/elements have any form of an ID then you can log the XPATH. This way a user could use some XML editor and apply the XPATH. Or put line numbers as an attribute to your elements/nodes and then report that attribute.

child windows z-order

mihan_12-Dec-02 2:50

mihan_

12-Dec-02 2:50

i have parent window (CDlg-derived) and 2 child windows, that hold same position inside parent dialog. i need programmaticaly activate one or another child window.
i used BringWindowToTop - to change z-order of child windows, but it doesnt work.

what should i do?

Re: child windows z-order

Alois Kraus12-Dec-02 3:09

Alois Kraus

12-Dec-02 3:09

Use

LRESULT Dlg::OnActivateWindow1(WPARAM, LPARAM)
{
Window1.ShowWindow(SW_SHOW);
Window2.ShowWindow(SW_HIDE);

return 0;
}

LRESULT Dlg::OnActivateWindow2(WPARAM, LPARAM)
{
Window2.ShowWindow(SW_SHOW);
Window1.ShowWindow(SW_HIDE);

return 0;
}

Re: child windows z-order

mihan_12-Dec-02 4:52

mihan_

12-Dec-02 4:52

this wont work, because i need both child windows visible at the same time - they have different HRGN.

Re: child windows z-order

Alois Kraus12-Dec-02 5:45

Alois Kraus

12-Dec-02 5:45

Overlapping Windows is not a good idea. You could use one big window and set later
the region which includes the shapes of both windows. This approach will give
You full freedom over the shape.

Re: child windows z-order

mihan_12-Dec-02 6:11

mihan_

12-Dec-02 6:11

i think its too complicated, because this region are already combined from others regions
and that other regions are made from bitmap with transparency zones.

maybe anyone knows how this algorithm realized in CTabCtrl?
i need almost the same behavior (please, dont suggest to derive my class from CTabCtrl Smile | :)

)

Re: child windows z-order

User 665812-Dec-02 6:48

User 6658

12-Dec-02 6:48

Have you tried SetWindowPos?

modified 12-Sep-18 21:01pm.

Re: child windows z-order

mihan_12-Dec-02 7:16

mihan_

12-Dec-02 7:16

yes, i've tried - doesnt work too

how to delete Win NT system start-up option

woonkop12-Dec-02 2:37

woonkop

12-Dec-02 2:37

After re-installation of Win NT on my PC,I noted that there are 4 options.

System start-up

1) Normal set-up
2) VGA Mode
3) Normal set-up
4) VGA Mode

I know there is a file to change n delete the start-up options, what is the filename and where ??

pls help

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