C / C++ / MFC

Re: Cannot covert parameter - __stdcall

26-Jan-05 9:48

Have you tried making the doThatThing() member function static?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

User 137680026-Jan-05 10:21

User 1376800

26-Jan-05 10:21

Hah! As simple as that. Worked perfectly.
Thanks a lot Smile | :)

Re: Cannot covert parameter - __stdcall

trelliot27-Jan-05 18:23

trelliot

27-Jan-05 18:23

I'm not really sure what you're trying to do, but it may be an ambiguity between ::doThatThing() and programApp::doThatThing() so you may have to explicitly declare the parameter as either ::doThatThing() or programApp::doThatThing() depending on where it is called.

Splitter window title

mdave26-Jan-05 7:55

mdave

26-Jan-05 7:55

I have seen at least one commercial product (VisualTest) that has a horizontal splitter window with a title. That is, the top gripper bar is wider than normal, and has text in it that describes the contents of the window below. A screen shot is available at:
http://www.magicdave.com/private/browse/vt.jpg

I can sort of simulate that if the window contains a ListView by setting the ListCtrl to REPORT style and adding one column heading with the text, but that leaves you with that annoying column sizing thing in the header, which I find unaesthetic. Further, you're out of luck entirely if the window contains a TreeCtrl--and the window I'm making does.

I have tried every solutuion I can think of, including attaching a custom CHeaderCtrl, but nothing seems to work.

Any suggestions?

Re: Splitter window title

Tom Wright26-Jan-05 9:25

Tom Wright

26-Jan-05 9:25

looks to me like an edit box with static text label at the top of it.

Tom Wright
tawright915@yahoo.com

Re: Splitter window title

mdave26-Jan-05 9:38

mdave

26-Jan-05 9:38

>looks to me like an edit box with
>static text label at the top of it.

Ah, that's another wrinkle I should have mentioned. This would indeed be fairly easy to do in a dialog-based app, but my app is SDI.

I'm thinking there must be some way of subclassing a splitter window to give it a title bar, but I haven't been able to find it.

Problem with storing values

RedDragon2k26-Jan-05 6:54

26-Jan-05 6:54

Hi
I'm having some problems storing some values. Here is it:
I have a class with is derived from CObject. It just stores Variables !

<br />
CMyStoreClass : public CObject<br />
{<br />
CString m_strName;<br />
<br />
CUIntArray m_arFirstArray;<br />
CUIntArray m_arSecondArray;<br />
[...].br />
CUIntArray m_arSixthArray;<br />
}<br />

Then in my Dialog class I have a variable which shall store the CMyStoreClass Instances.

<br />
CPtrList m_Rules;<br />

To Add a Instance of CMyStoreClass:

<br />
CMyStoreClass store;<br />
store.m_strName = "Test";<br />
store.m_arFirstArray = 5;<br />
store.m_arSecondArray = 6;<br />
[...].br />
if(m_Rules.IsEmpty())<br />
m_Rules.AddHead(&store);<br />
else<br />
m_Rules.AddTail(&store);<br />

Everthing still works fine but now if i want to access the CMyStoreClass Objects again:

<br />
for(POSITION pos = m_Rules.GetHeadPosition();pos != NULL; )<br />
{<br />
CMyStoreClass* pStore = (CMyStoreClass*) m_Rules.GetNext(pos);<br />
ASSERT(pStore);<br />
if(pStore->m_strName != "Test") continue;<br />
}<br />

when my programm executes this lines it breaks and "strcmp.asm" opens and i get to "dodwords:".
I have no clue what's wrong. Anyone ? Any clue ?

MFG
RedDragon2kx D'Oh! | :doh:

Unix and C are the ultimate computer viruses.

David Crow26-Jan-05 7:04

26-Jan-05 7:04

Have you stepped into CString's != operator to see what is going on?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

RedDragon2k26-Jan-05 7:07

26-Jan-05 7:07

I gonna try this, but if i try:

<br />
MessageBox(pStore->m_strName);<br />

it fails, szText is marked as <badptr> in Debugger Window. It says:
CXX0030: Error: expression cannot be evaluated char

Unix and C are the ultimate computer viruses.

David Crow26-Jan-05 7:13

26-Jan-05 7:13

RedDragon2k wrote:
it fails,

Which means what?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

RedDragon2k26-Jan-05 7:15

26-Jan-05 7:15

pStore->m_strName {0x00000000 <bad ptr="">}
- ATL::CSimpleStringT<char> {0x00000000 <bad ptr="">} ATL::CSimpleStringT<char>
- m_pszData 0x00000000 <bad ptr=""> char *
CXX0030: Error: expression cannot be evaluated char

Unix and C are the ultimate computer viruses.

David Crow26-Jan-05 7:35

26-Jan-05 7:35

I'm wondering if the ATL forum would be of any help.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

RedDragon2k26-Jan-05 7:40

26-Jan-05 7:40

I gonna post there, too. Thx for your help

Unix and C are the ultimate computer viruses.

David Crow26-Jan-05 7:45

26-Jan-05 7:45

I think I see what might be ailing you. Try this:

CMyStoreClass *store = new CMyStoreClass;
store->m_strName = "Test";
store->m_arFirstArray = 5;
store->m_arSecondArray = 6;
[...].if(m_Rules.IsEmpty())
    m_Rules.AddHead(store);
else
    m_Rules.AddTail(store);

BTW, you can use AddTail() exclusively rather than calling IsEmpty() and AddHead().

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

RedDragon2k26-Jan-05 7:50

Converting text to float (MFC)

26-Jan-05 7:50

Thx man, that helped. Big Grin | :-D

Unix and C are the ultimate computer viruses.

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Member 166473326-Jan-05 6:39

26-Jan-05 6:39

I'm trying to convert a Ctring I read from an editbox into a float. This is the code I've got so far;

CString val, txtEdit;<br />
float boxval = 0.2f;<br />
<br />
GetDlgItemText(IDC_EDITBOX,txtEdit);<br />
char *txt = (char *) (LPCTSTR) txtEdit;  <br />
  //where txtEdit is the Ctring containing the text read from an Edit box<br />
<br />
sscanf(txt, "%f", &boxval);<br />
val.Format(_T("%f"), boxval);<br />
AfxMessageBox(val);

Unfotunately it does not return the right float. It does return a float but it is truncated to its integer value. I.e. if I enter 2.3 it returns 2.00.

Could anyone help me here? What am I doing wrong?
What's the best way to convert a string into a float?
Thanks!

David Crow26-Jan-05 6:47

26-Jan-05 6:47

How about:

GetDlgItemText(IDC_EDITBOX, txtEdit);
double d = atof(txtEdit);

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Member 166473326-Jan-05 6:56

26-Jan-05 6:56

Thanks, I had tried that too but have the exact same problem!
I should prob add that it works ok with text in define in the code but not with text I read from an edit box...
Really don't understand what I'm doing wrong???

David Crow26-Jan-05 7:00

26-Jan-05 7:00

What is the value of txtEdit after the call to GetDlgItemText()?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Member 166473326-Jan-05 7:05

26-Jan-05 7:05

When I display it in a messagebox its value is the decimal value read from the edit box.

David Crow26-Jan-05 7:13

26-Jan-05 7:13

Unless there is something else going on that is not being shown, the code snippet I provided will work.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Member 166473326-Jan-05 7:16

26-Jan-05 7:16

Actually I've only just realised that only the first digit is being converted. I.e. if I enter 2.3 I get 2.00 but if I enter 14.6 I get 1.00.
I must do something really wrong somewhere but I can't see where! Sigh | :sigh:

Thanks for your help!