|
Please reduce the suspense. What happened later?
|
|
|
|
|
Ed Gadziemski wrote:
Please reduce the suspense. What happened later?
 He emailed me his assignment question docs
Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.
|
|
|
|
|
I'm trying to save the current file i'm working on in a visual studio file from an Addin.
I can not get the save command to work. How do you use the command?
Examples, Suggestions?
Here is the code
STDMETHODIMP CCommands::FileFavoritesCommandMethod()
{
AFX_MANAGE_STATE(AfxGetStaticModuleState())
//Get the current file working on
CString csCurrentFile;
CComPtr<idispatch> pActiveDocument;
m_pApplication->get_ActiveDocument(&pActiveDocument);
if(pActiveDocument)
{
CComQIPtr<itextdocument,&iid_itextdocument> spActDoc(pActiveDocument);
if(spActDoc)
{
spActDoc->Save();
BSTR bstrName;
spActDoc->get_FullName( &bstrName );
}
}
}
|
|
|
|
|
how do you know that it is not working?
|
|
|
|
|
It's not compiling.
I'm not sure On what to pass in on the parameters, It wants
::Save(THIS_ VARIANT vFilename, VARIANT vBoolPrompt, DsSaveStatus FAR* pSaved)
I've tried
DsSaveStatus saved;
Save(NULL, TRUE, &saved);
return
--cannot convert parameter 1 from 'const int' to 'struct tagVARIANT
Pluss plenty more and they all say they cannot convert parameter 1 to struct tagVARIANT
Scott
|
|
|
|
|
Use the following code
VARIANT vtErr;
vtErr.vt = VT_ERROR;
vtErr.scode = DISP_E_PARAMNOTFOUND;
VARIANT vtPrompt;
vtPrompt.vt = VT_BOOL;
vtPrompt.boolVal = VARIANT_TRUE;
spDoc->Save(vtErr, vtPrompt, &saved);
This would work but life would be much cool if you use CComVariant or _variant_t.
|
|
|
|
|
that worked, thanks.
I tried using _variant_t but it gave an error when compiling. How do you use CComVariant and _variant_t.
thanks
Scott
|
|
|
|
|
#include <comdef.h>
.
.
.
spDoc->Save(vtMissing, _variant_t(true), &status);
|
|
|
|
|
That gave me the linking errors
Commands.obj : error LNK2001: unresolved external symbol "class _variant_t vtMissing" (?vtMissing@@3V_variant_t@@A)
Commands.obj : error LNK2001: unresolved external symbol "void __stdcall _com_issue_error(long)" (?_com_issue_error@@YGXJ@Z)
|
|
|
|
|
You need to have comsupp.lib linked
|
|
|
|
|
|
How can I replace the scrollbars in a CEdit derived edit control with my own, derviced from CScrollBarCtrl? I've tried all sorts of wierd and wonderful methods, but none seem to work. Also, how would I go about doing the same for list boxes, list controls and combo boxes?
____________________
David Wulff
hu·mour Pronunciation Key (hymr)
n. & v. Chiefly British
Dave's Code Project Screensaver and Wallpaper page.
|
|
|
|
|
Have a look at this article. There is a brief discussion of this question.
Please let us know if you can pull it off.
|
|
|
|
|
|
You shoule be able to override the windows CWnd::GetScrollBarCtrl() virtual function for the window that contains the scroll bars. You can then return pointers to your replacement scrollbars for the horizontal and vertical scrollers.
If you take a look at the base class code you will see what you need to do.
Roger Allen
Sonork 100.10016
If I had a quote, it would be a very good one.
|
|
|
|
|
Well that is the first thing I thought of after browsing through the documentation, but it, well, doesn't seem to work. It is of course possible that I approached it wrong, so I will have a go with a new test app later just to make one hundred percent sure.
Thanks.
____________________
David Wulff
hu·mour Pronunciation Key (hymr)
n. & v. Chiefly British
Dave's Code Project Screensaver and Wallpaper page.
|
|
|
|
|
Hi does anyone know of any free cda to wav (or mp3!) freeware mfc classes ?
Bryce
|
|
|
|
|
I am trying to see under what practical circumstances a virtual base class is needed. I know there are lot of experienced programmers here. I am curious to know whether anyone used virtual base classes in real life. If yes for what?
|
|
|
|
|
I wrote a paint program in MFC, and the mainframe class carried a pointer to a PaintTool class, which was a virtual base for all the different tools in the program. It had methods like Draw and Preview, and also methods such as OnLeftButtonUp, so that I could code the behaviour of the tool entirely in the tool, and MFC called them via the pointer to the base class instance.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
|
|
|
|
|
Did you have something like this :-
class MainFrame
{
private:
PaintTool* m_pTool;
}
class PaintTool
{
...
};
class PaintTool1 : PaintTool
{
};
class PaintTool2 : PaintTool
{
};
Where does multiple inheritance figure in this?
|
|
|
|
|
I don't see how you were asking about multiple inheritance, I thought you wanted to know about virtual base classes ?  Did you mean to emphasise the plural, i.e. more than one virtual base ?
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
|
|
|
|
|
My understanding of virtual base classes.
(Excuse the C# style synatx)
class A
{
int x;
}
class B : A
{
}
class C : A
{
}
class D : B, C
{
}
In case of D there will be two distinct copied of data for A as it is not virtual base.
D* pd = new D;
C* pc = (C*)pd;
pc->x = 10;
B* pb = (B*)pd;
//pc->x is not same as pb->x
pb->x = 11;
Now decalring like this
class B : virtual A
{
}
class C : virtual A
{
}
class D : B, C
{
}
In this case,
C* pc = (C*)pd;
pc->x = 10;
B* pb = (B*)pd;
//pc->x is same as pb->x
ASSERT(pc->x == pb->x)
This is what I always understood the purpose of virtual base classes. Am I wrong?
|
|
|
|
|
A virtual base class has at least one pure virtual function
virtual void PaintNow(CDC & DC) =0;
Therefore it cannot be instantiated, it exists somewhat like an interface as I understand it in C# ( which is to say barely  ). Multiple inheritance is possible, but in no way implied by the fact that a class is a virtual base. It simply means the class itself cannot be instantiated, because it defines functions that derived classes MUST impliment ( which is it's function ).
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
|
|
|
|
|
Christian Graus wrote:
A virtual base class has at least one pure virtual function
I thought that was abstract class.
Don't know what is the emoticon for that feeling.
 
|
|
|
|
|
You are right, that is an abstract base class.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
