|
PJ Arends wrote:
If they are both active, why are you declaring a new instance of CMyForm in your OnBnClickedButton1() handler? You should instead get a pointer to the existing CMyForm.
You should learn how to use the debugger. When you get an assertion failure, you should be able to doubleclick on the message line in the output window, and visual studio will open the correct file at the line that caused the assertion. The line will read "ASSERT (SomethingOrOther)". Using that clue, you will be able to figure out which variable has an invalid value, and by using the call stack, you can trace backwards in the program until you get to your own code.
Thank you very much for helping me.
I changed the code to:
CMyForm* prova;
prova = new CMyForm;
prova->str = "ciao";
AfxMessageBox(prova->str);
delete prova;
This works!
CMyForm* prova;
prova = new CMyForm;
prova->m_edit.SetWindowText("ciao");
delete prova;
This still doesn't work.
I learnt what you said so:
void CWnd::SetWindowText(LPCTSTR lpszString)
{
ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));
if (m_pCtrlSite == NULL)
::SetWindowText(m_hWnd, lpszString);
else
m_pCtrlSite->SetWindowText(lpszString);
}
WHAT THIS MEANS?
|
|
|
|
|
laphiji wrote:
CMyForm* prova;
prova = new CMyForm;
prova->m_edit.SetWindowText("ciao");
delete prova;
That won;t work. The edit control has not been created yet!!!
Nish
Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.
|
|
|
|
|
laphiji wrote:
void CWnd::SetWindowText(LPCTSTR lpszString)
{
ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));
if (m_pCtrlSite == NULL)
::SetWindowText(m_hWnd, lpszString);
else
m_pCtrlSite->SetWindowText(lpszString);
}
WHAT THIS MEANS?
ASSERT(::IsWindow(m_hWnd) will cause a debug assertion if the window that you are trying to set the text for does not exist. You have declared the CWnd object, but you have yet to create the actual window at the system level.
Also :
laphiji wrote:
CMyForm* prova;
prova = new CMyForm;
prova->m_edit.SetWindowText("ciao");
delete prova;
Even if this did work, (which it won't for the above reason) the prova form would only briefly flash on the screen because it is created, then destroyed within your function call. it is not persistant beyond the beyond the length of time it takes the computer to process the message.
You need something like this:
{
CMyForm *prova;
prova = Get_The_Address_Of_The_Already_Existing_CMyForm_Object();
prova->m_edit.SetWindowText("ciao");
}
---
CPUA 0x5041
Sonork 100.11743 Chicken Little
Within you lies the power for good - Use it!
|
|
|
|
|
Hi,
i have some problem to use StrRetToBuf function. I use it like this :
StrRetToBuf(&strDispName, pidlItems, szParseName, MAX_PATH);
before using this function i included necessary header files :
#include <shlobj.h>
#include <shlwapi.h>
#pragma comment(lib,"shlwapi.lib.")
but i obtain the following error message :
error C2065: 'StrRetToBuf' : undeclared identifier
Can anybody help me
Thanks in advance
|
|
|
|
|
How to create top-level window transparent for mouse clicks? I.e. when user clicks the window, it doesn't ACTIVATES, it must seens like window not exist, but it must be visible... ?I tried to use WM_NCHITTEST and to return HTTRANSPARENT, then I tried to handle WM_MOUSEACTIVATE, but in vain.
Help!!
|
|
|
|
|
just write a hook and hook the mouse mesages as u like...
mm i am not sure but u try the follow
in the PreTranslateMessage()
check the message is mouse message and then u handle that message as u like..just trap themm ...
Renjith Pandalam
The TRUE CP -ian
|
|
|
|
|
Hi, pals!
I want to change variable type from CInternetFile* to FILE*.
I am using the following statments,
file2=(FILE*)file1;
Here, the type of file1 is CInternetFile*, and the type of
file2 is FILE*.
I want to know whether my method of type cast (from
CInternetFile* to FILE* ) is correct and safe?
My purpose is to convert from CInternetFile* to FILE*.
Best regards,
George Ma
|
|
|
|
|
Try this :-
Assume m_ifile is a CInternetFile*
FILE *fp = (FILE*) m_ifile->m_hFile;
I am not at all sure whether it will work! But try it anyway!
Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.
|
|
|
|
|
No, a CInternetFile* is not a FILE*. CInternetFile* is a pointer to a class called CInternetFile, while a FILE* is a structure (not a class) for the C Runtime Library. They are two entirely different things, and casting one to the other will do nothing but crash your program (if you're lucky).
There are only three cases where you can cast one pointer to another kind of pointer safely.
1) When the pointer you cast to is a base class of the first pointer.
2) When the class provides a conversion cast to the pointer type you want
3) When a structure (or class without virtual functions) has as it's first member the type you are casting to (this is used often for bitmap headers and such)
Of course this is a generalization, and there are ways around these rules, but if you don't know what you're doing they are good rules to follow.
--
Where are we going? And why am I in this handbasket?
|
|
|
|
|
Thanks, Erik!
Regards,
George
|
|
|
|
|
Hi.
I have a question about the use of LOGFONT with CFontDialog. I would like to have an option to change the font including size, weight, etc. I implemented a feature with CFontDialog support. I pass a pointer to a LOGFONT object when I instantiate the CFontDialog. Upon DoModal() == IDOK, I create a new LOGFONT object and assign it the value from CFontDialog. The program works sometimes. I am experiencing some weird reactions. First, the size of the font rarely comes out correctly. The size seems to be 10x *smaller* than the actual size of whatever the user selects from CFontDialog. Vice versa, when CFontDialog first starts up, I am able to pass it a LOGFONT of the current font. Again, it reads and interprets the font size incorrectly. For example, all default font size is 110 (11 points). However, when CFontDialog starts up, it interprets 110 as 83.
Here is a concise example.
-----
LOGFONT *mLFont = new LOGFONT;
memset(mLFont, 0, sizeof(LOGFONT);
mLFont->lfHeight = 110;
strcpy(mLFont->lfFaceName, "Microsoft Sans Serif");
CFont *myFont = new CFont;
myFont->CreatePointFontIndirect(mLFont);
// Everything is good up to this point.
CFontDialog myFDlg(mLFont);
if (myFDlg.DoModal() == IDOK)
{
// I am not sure if I need to create a new (clean) LOGFONT object
if (mLFont != NULL)
{
delete mLFont;
mLFont = NULL;
}
mLFont = new LOGFONT;
memset(mLFont, 0, sizeof(LOGFONT));
myFDlg.GetCurrentFont(mLFont);
}
-----
Okay. For some reason, the actual font that GetCurrentFont(...) passes back is 10x smaller than the actual size or the size that the user actually thought it want it to be
I am using CEditView. I use GetEditCtrl().SetFont() to set the font. I use GetEditCtrl().SetWindowText(...) to set the text.
I mentioned about deleting a LOGFONT object and allocating a new object each time I make a change to an LOGFONT object. Is that necessary?
Thanks,
Kuphryn
|
|
|
|
|
Try setting the height like this:
lfHeight = -MulDiv(11, GetDeviceCaps(hDC, LOGPIXELSY), 72);
This comes from the LOGFONT entry in MSDN.
Like it or not, I'm right.
|
|
|
|
|
Okay. The solution is to use CreateFontIndirect() instead of CreatePointFontIndirect(). I have no idea why that is.
Also, when I first instantiate a CFontDialog and pass in a reference of a LOGFONT object of the current font, for some reason CFontDialog does not recognize its height. It only recognizes the height after the user makes changes via CFontDialog.
Kuphryn
|
|
|
|
|
can anyone tell me the software name that i can create avi file please
i downloaded, videdit but i can't install it. it is keep asking missing sample.avi
so i search one avi file and change the name as sample.avi but another error message, " the same is not the same" pop up..
i want to create my own .avi file so i can use animation control of MFC.
thanks
|
|
|
|
|
Win wrote:
i search one avi file and change the name as sample.avi but another error message, " the same is not the same" pop up..
Amazing.
I think an avieditor comes with VC, but I don't remember the name of it. Look in the Tools directory.
|
|
|
|
|
Rama Krishna wrote:
Amazing.
Truly so!!!
Nish 
Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.
|
|
|
|
|
i meant "the size is not the same"... it was a typo... sorry friends...
|
|
|
|
|
Platypus Animator.
Maxwell Chen
Lets make bugs better!
|
|
|
|
|
|
CAnimateCtrl only can display AVI file?
i want to post my animation .gif file on my dialog but don't know how. I only found a big class on codeguru. but i dont' want an another big class add to my application to run a .gif file. another one is CAnimation, that only can run avi file.. ( from what i understood). i want .gif not avi. anyway. i dont' even know how to create .avi file. what kind of software that i have to use to create avi.. adobe photoshop doesn't have .avi file format when you save.
i think i have to drag picture icon from control box( control box that has all check, radio, animation, treectrl,listctrl,.. etc.) and then just post my .gif on the dialog like other check boxes and radio buttons.
how can i do that? no. can i do it?
|
|
|
|
|
'cause you have to pay money to develop software that deals with .gif files. Search CP; i know there's at least one article on playing .gif files. Or search the Net; there are quite a few AVI creation proggies out there, some free even.
[update]
Just stumbled across this AVI software; give it a look
---Shog9---
Extreme ways are back again, extreme places i didn't know
I broke everything new again, everything that i'd owned -- Moby, Extreme ways
|
|
|
|
|
it's not that difficult all you have is to add an ActiveX control to your dialog called Animation GIF Control .. easy to use .. enjoy it )
MCP
|
|
|
|
|
how? could you tell me please, i have never used activex control. i read activex control from mfc book by Mike Blaszczack. i though activex control is a server type and it is like DLL. that's what i understood from what i read.
now u are saying that i can call animation GIF control. so i looked for it and i could not find animation GIF control when you inserting activex control to your dialog.
i only found
1) animation control 6.0
2) animation control version 5.0
3) direction animation control
4) direction animation path
5) direction animation sequencer
6) direction animation structure
7) direction animation window
so i added each one of them to my applicaiton, but i dont' know how to use them , i couldn't find in MFC lib either.. i search for those classes that activx control created or vc 6 created in MFC and online.. but can't find it.
tell me how to use activex controla and where can i find animation gif control?
i just simple want my gif file running on my dialog.
i didn't except posting gif file on dialog is that difficult..
|
|
|
|
|
why dont u just render each frame to screen? gif are small enuf.
norm
|
|
|
|
|
hi.. all
my application is a printing program.
the program gets all the files from the choosen folder and insert to the tree, ( tree ctrl)
there are checkbox for each tree item.
when the item is checked, do printing, and estimate how many pages those checked files will be printed.
to do estimating and printing, at least one file or one item has to be checked, otherwise, the message "no file is checked". will shows up.
that's basiscally what my program does.
if the program (i just double click on .exe file from debug folder) is run under win2000, and i check on one file, then click on estimate pages button to estimate num of pages that will be print. it gives me num of pages.
but under XP, i did the check the same file, then click on estimate pages button, "no file is checked " message shows up.
why under win2000 works and not under xp eventhough runing the same program, did the same thing, calling the same function?
oh.. i dont' have visual studio under xp though... but i have .dll pasted into my program folder.. so it is runnable under xp too.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
