C / C++ / MFC Discussion Boards

Re: i'm foolish, so you can help me very easy

nenfa5-Dec-09 5:46

nenfa

5-Dec-09 5:46

you're a good man, thank you very much

Why GlobalLock failed?

transoft3-Dec-09 3:11

transoft

3-Dec-09 3:11

Hi,

I tried to use "GlobalLock" to get HBITMAP data. But it returns NULL.

void myfunc(HBITMAP hMen)
{
....
lpVoid = (UCHAR *)GlobalLock(hMem);
....
}

lpVoid is NULL

What else function I can use to get Bitmap data from HBITMAP?

Thanks,

Re: Why GlobalLock failed?

Rajesh R Subramanian3-Dec-09 3:16

Rajesh R Subramanian

3-Dec-09 3:16

transoft wrote: Why GlobalLock failed?

I found this little detail in the documentation[^] page:

If the function fails, the return value is NULL. To get extended error information, call GetLastError()[^].

“Follow your bliss.” – Joseph Campbell

Re: Why GlobalLock failed?

C^hris L^osinger3-Dec-09 4:23

C^hris L^osinger

3-Dec-09 4:23

transoft wrote:
What else function I can use to get Bitmap data from HBITMAP?

GetDIBits

an HBITMAP is not an HGLOBAL.

image processing toolkits | batch image processing

How can i STOP this

Hwewet3-Dec-09 1:58

Hwewet

3-Dec-09 1:58

Hello,

when i came with the debugger to a function like this my
debugger will step into an little part of assembler.
i think it is the constructor.

how can i deactivate this sh*t!

i use MFC 2003 Version 7.1

void test(CString compress)
{

}

test("HALLO");

Thanks

Re: How can i STOP this

Richard MacCutchan3-Dec-09 2:47

Richard MacCutchan

3-Dec-09 2:47

Hwewet wrote:
how can i deactivate this sh*t!

This type of language should be reserved for the back room.

However if you do not want to see the assembler then use "Step Over" rather than "Step Into".

Re: How can i STOP this

Rajesh R Subramanian3-Dec-09 2:57

Rajesh R Subramanian

3-Dec-09 2:57

I'm not sure that I understand your query right, but you're probably pressing F11 instead of F10?

“Follow your bliss.” – Joseph Campbell

Re: How can i STOP this

Hwewet28-May-10 1:47

Hwewet

28-May-10 1:47

What i mean is when the CString is part of an function call.
When i try to step into the function first all of the Cstring constructors
comes with assembler code.

void function(CString xy,CString xy,CString xy)
{
}

F11

first CString assembler, sec. CString assembler,..., enter function...

Re: How can i STOP this

nenfa3-Dec-09 3:41

nenfa

3-Dec-09 3:41

you could press ctrl + tab and it'll restore the nature view

WPF and VC++

Anu_Bala3-Dec-09 1:45

Anu_Bala

3-Dec-09 1:45

Hi,
This is not the proper forum for my question.But i dont know where to post it.sorry.

Iam planning to use WPF controls in my MFC application.Either directly or by creating DLL in C#.

But i dont know anything about that.Is there any book to buy about WPF and VC++.
Pls provide me any information on that.

Just i want is..the look of WPF like buttons,colored Listbox,colored Dialog.But functionality of all buttons should come in MFC applcaition only.

Anu

Re: WPF and VC++

Rolf Kristensen3-Dec-09 10:56

Rolf Kristensen

3-Dec-09 10:56

You can host .NET content in a VC++ application. Usually there are two ways:
1) Convert the unmanged c++ application to managed using the /clr compiler switch /clr. Then you have access to all .NET code.
2) Load the WPF content from a .NET dll and host it using CLI/interop.

Integrate Windows Forms Into Your MFC Applications Through C++ Interop[^] (See Avalon part)
Hosting WPF Content in an MFC Application[^]
Hosting a WPF Control in MFC and Enable Cut-and-Paste[^]
Walkthrough: Hosting Windows Presentation Foundation Content in a Win32 Application[^]
Hosting WPF Content in an MFC App [^] (Using /clr switch)

Owner Draw ListBox not recognising tab commands in strings

maycockt3-Dec-09 1:18

maycockt

3-Dec-09 1:18

Hi,

After some struggle, and some good help from this forum, I find that I am now more or less managing to be able to manage my owner draw list box, except for 1 issue.

The strings I want to use contain tabs.

When I set my CreateStruct up in my PreCreateWindow, I have to disable LBS_MULTICOLUMN or my custom DrawItem function does not get called.
The downside of disabling the LBS_MULTICOLUMN is that the tabs in the string are discarded and my formatting goes to pot, even when configuring LBS_USETABSTOPS.

Any Suggestions?

TIA

Tony

Re: Owner Draw ListBox not recognising tab commands in strings

David Crow3-Dec-09 3:02

David Crow

3-Dec-09 3:02

maycockt wrote:
...even when configuring LBS_USETABSTOPS.

Did you send the control a LB_SETTABSTOPS message?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: Owner Draw ListBox not recognising tab commands in strings

maycockt3-Dec-09 3:32

maycockt

3-Dec-09 3:32

Hi,

I hadn't sent a LB_SETTABSTOPS message, but I had used SetTabStops funtion, which had no effect.

In my OnInitDialog I have tried the following......

<per>
m_plbMyControl = new CCustomListBox();

if(NULL != m_plbMyControl )
{
CRect rList(10, 10, 580, 285);
DWORD dwStyle = LBS_NOTIFY | LBS_OWNERDRAWVARIABLE | LBS_NOINTEGRALHEIGHT | LBS_HASSTRINGS | LBS_USETABSTOPS | WS_BORDER | WS_HSCROLL;

if(TRUE == m_plbMyControl->Create(dwStyle, rList, this, IDC_LIST_CONTROL))
{
//m_plbMyControl->SetTabStops(16);
::SendMessage(m_plbMyControl->m_hWnd, LB_SETTABSTOPS, (WPARAM)1, (LPARAM)16);
}
}

Whereas the SetTabStops call had no effect, the ::SendMessage just gets an unhandled exception.
I am sure the SetTabStops or LB_SETTABSTOPS is the right way to go, I just cant seem to work out how to use it properly!!!

Any further help would be much appreciated.

TIA

Tony

Re: Owner Draw ListBox not recognising tab commands in strings

David Crow3-Dec-09 3:39

David Crow

3-Dec-09 3:39

maycockt wrote:
//m_plbMyControl->SetTabStops(16);
::SendMessage(m_plbMyControl->m_hWnd, LB_SETTABSTOPS, (WPARAM)1, (LPARAM)16);

Just to see if the tabstops are even being used, have you played around with other values besides 16? Four character units does not seem large enough to separate anything but very small (1-2 characters) words.

Re: Owner Draw ListBox not recognising tab commands in strings [modified]

maycockt3-Dec-09 3:57

maycockt

3-Dec-09 3:57

Hi,

I've tried 0, 1, 4, 8, 16........
Each time using ::SendMessage it crashes with an Unhandled Exception.

TIA

Tony

modified on Thursday, December 3, 2009 10:06 AM

Re: Owner Draw ListBox not recognising tab commands in strings

David Crow3-Dec-09 4:13

David Crow

3-Dec-09 4:13

maycockt wrote:
I've tried 0, 1, 4, 8, 16........

(I think) You need to use larger values, not smaller.

Re: Owner Draw ListBox not recognising tab commands in strings [modified]

maycockt3-Dec-09 4:21

maycockt

3-Dec-09 4:21

A value of 16 should give 4 display units I believe, so bigger than that would cause larger gaps in my spacing?

I don't understand why the ::SendMessage is failing though, each time it falls over in the first ::CallWidnowProc of DefWindowProc, i.e. m_pfnSuper is valid.

I can use a WPARAM of 0, and a LPARAM of NULL and it doesnt fail, but the ListBox still ignores TabStops.....

I'm beginning to think a redesign using a list control and hidden HeaderCtrl might be the way to go........

Tony

modified on Thursday, December 3, 2009 10:45 AM

Re: Owner Draw ListBox not recognising tab commands in strings

David Crow3-Dec-09 5:41

David Crow

3-Dec-09 5:41

maycockt wrote:
A value of 16 should give 4 display units I believe, so bigger than that would cause larger gaps in my spacing?

Yes, of course. The intent was to see if the tabstops were even working. At this point, you don't know if the tabstops are just not large enough, or if the LBS_USETABSTOPS style is being ignored, or if the LB_SETTABSTOPS message is wrong.

Re: Owner Draw ListBox not recognising tab commands in strings

maycockt3-Dec-09 5:48

maycockt

3-Dec-09 5:48

Hi David,

That probably was more blunt than I intended. I was more sort of querying that my understanding was correct of the dimensions.

The LBS_USERTABSTOPS I would guess is being ignored, probably because of one of the other settings.

Incidentally, would SetTabStops(16) have the same effect as the SendMessage()?

I would have thought it should.

Thanks for your help so far

Tony

Re: Owner Draw ListBox not recognising tab commands in strings

David Crow3-Dec-09 5:55

David Crow

3-Dec-09 5:55

maycockt wrote:
The LBS_USERTABSTOPS I would guess is being ignored, probably because of one of the other settings.

That's easy enough to test. Create a non-ownerdraw listbox, and call AddString() to add the strings to it. If that works, then the problem likely has to do with the LBS_OWNERDRAWVARIABLE style.

maycockt wrote:
Incidentally, would SetTabStops(16) have the same effect as the SendMessage()?

Yes. The former is just a convenient wrapper around the latter.

Re: Owner Draw ListBox not recognising tab commands in strings

maycockt3-Dec-09 6:05

maycockt

3-Dec-09 6:05

Having removed the LBS_OWNERDRAWVARIABLE the formatting is using the tabs appropriately, but with that I am back to square 1 of needing to intercept the drawing as I need to have some of the text emboldened.

Do you think then that my style settings must be wrong?

I currently rule out and include in the PreCreateWindow as follows

<per>
// Turn off disallowed styles
cs.style &= ~( LBS_SORT |
LBS_OWNERDRAWFIXED |
LBS_MULTICOLUMN);
// Turn on mandatory styles
cs.style |= ( LBS_NOTIFY |
LBS_HASSTRINGS |
LBS_OWNERDRAWVARIABLE |
LBS_NOINTEGRALHEIGHT |
LBS_USETABSTOPS |
WS_BORDER );

Anything I am missing?

Tony

Re: Owner Draw ListBox not recognising tab commands in strings

David Crow3-Dec-09 6:22

David Crow

3-Dec-09 6:22

Are you calling TextOut() in the CCustomListBox::DrawItem() method? If so, try calling TabbedTextOut() instead. Also, the call to SetTabStops() seems to be unnecessary.

Re: Owner Draw ListBox not recognising tab commands in strings

maycockt6-Dec-09 20:38

maycockt

6-Dec-09 20:38

Hi David,

Thanks for your help.
TabbedTextOut was the solution to achieve what I wanted. I'm still a bit confused why LB_USETABSTOPS wasnt working, but hey ho - we have what the moeny men want now.

Thanks again

Tony

Re: Owner Draw ListBox not recognising tab commands in strings

raymondc05-Dec-09 12:03

raymondc0

5-Dec-09 12:03

Um, it's owner-draw. You're the one doing the drawing. If it's not drawing the way you want, then fix your drawing code.

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