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Im very new to the boost library, and have just started to intergrate the shared_ptr smart pointer into one of my applications. I am storing a lot of pointers (to objects) in a std::vector.
typedef boost::shared_ptr<cmyclass> my_shared_ptr;
typedef std::vector<my_shared_ptr> my_shared_ptr_vector;
What i need to do is to additionally store a reference to the same objects
(in the vector) in a CListCtrl (MFC). The CListCtrl allows you to associate
a pointer with each item (row) in the list control.
Before i used shared_ptr i used to add the data as below:
CMyClass pItem = new CMyClass();
my_vector->push_back(pItem);
CListCtrl::SetItemData->SetItemData(iItemNumber, (DWORD)pItem);
Now using shared_ptr (see below) i get a compiler error saying that it cannot convert from my_shared_ptr to DWORD.
my_shared_ptr myPtr (new CMyClass();
my_shared_ptr_vector->push_back(myPtr);
CListCtrl::SetItemData->SetItemData(iItemNumber, reinterpret_cast<dword_ptr>(myPtr));
My second question is if i was able to add the item data as ...
CListCtrl::SetItemData->SetItemData(iItemNumber, reinterpret_cast<dword_ptr>(myPtr));
...would the internal reference counter be incremented in shared_ptr?
My vector may be destroyed before my CListCtrl and I dont want the item data to be deleted until both are out of scope.
Thanks
Andy
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See if this helps.
CListCtrl::SetItemData->SetItemData(iItemNumber, (DWORD)(void*)myPtr.get());
You can use reinterpret_cast twice if you like.
Hate is not a family value.
-pete
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Thanks for your suggestion.
Does get() increment the internal reference count in shared_ptr?
From what ive read it doesnt.
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how can i copy a complete partition into a back up file
if there is any API functions please send me or tell me the way i can make it.
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Hello,
I have created an MFC application and have added Printing and Print Preview capability. The only problem i have is that the "Prev Page" and "Zoom Out" buttons on the Print Preview toolbar are always disabled. The "Two Pages" button and "Next Page" are enabled and work correctly.
For the Prev page button, I am setting the CPrintInfo::SetMaxPage() and CPrintInfo::SetMinPage() and CPrintInfo::m_nCurPage values in OnPreparePrinting() but this doesnt seem to make a difference. Also, shouldnt the Zoom Out button be enabled once ive clicked Zoom In???
Is their anything else that i can try which will enable these button?
Thanks
Andy
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I am trying to create custom wizard where I want to add multiple projects to single solution file. In the script file (default.js) in the OnFinish() function I want to add some projects to the existing solution file.
Now if I added multiple projects using CreateCustomProject() function but when I actually create any solution I just see one project, other project remain orfan.
Please let me know which function to use to add the projects to the exisiting solution file. I'm using VS.NET 2003 for the custom wizard project.
Please HELP
Thanks.
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I'm thinking of automatically configure the 802.11 wireless network without use the standard windows wizard.
Can any expert tell me which kind of steps and APIs I should use to achieve this object.
Thanks
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Is there any way to compile only 1 cpp file in Visual Studio 2003? The build menu only allows you to build the whole project, but I want to compile only 1 source file. I could do it in VC6, but they removed the option, apparently. Do I have to use the command line to do this?
Thanks for any help.
tentons
http://www.griminventions.com
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Don't know about menus, but I use Ctrl-F7 for that, just like in VC6 (I have VC++ key mappings)
My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.
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It's still there.
Right-click on *.cpp file in solution tree, you'll see "Compile" option there.
And you can press ctrl+f7 as it was mentioned already.
Cheers.
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How to make a button like MSN sign in button
and how to change she mouse to hand when the mouse is over the button...
thanks : )
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I'm a newbie at this and I'm trying to find an easy way to reposition the controls accordingly in a dialog box when it is resized? (i.e. buttons, list controls, etc..) This includes being resized and also using the maximize/minimize
I've checked out some of the classes that you can add from codeproject.com but I wanted to know if there was a way to do it in the code.
Any help is appreciated.
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Any reason why you don't want to use the classes for resizing supplied here in CodeProject? to make what you want, it will be necessary a lot of code to move each control. Why not to encapsulate that operation in an easy to use class?
If you want to know how it is done, just study the classes. They are easy to understand.
Jaime
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Thanks for the advice Jaime.
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I'm using VC4.2 (for specific reasons, so dont tell me to upgrade)
Some how I cant add breakpoints. I've deleted the ncb file and all obj/lib etc files.
Every time I set a breakpoint and hit run, it disables them. This happens w/ my debug and release version. I have 'generate debug info' set in my project settings.
Any ideas??
-C
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hm.. this hapens when I try to set a breakpoint
in a cpp file, that belong to a DLL, which is loaded from the main programm..
try this:
_asm int 3;
but now you can only start with debuger attached
on the proccess.
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I dont understand how this helps.
I'm creating a DLL and starting it with an exe. I want to stop and step through from a certain point. How does this help setting and steppin through code?
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 as I thought.
just put the
_asm int 3;
in the code, where you want the
debuger to stop. but you MUST start
the programm with a debuger. if not, an exception
is thrown.
the debuger stops at this assembly code.
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What kind of DLL is it? I cannot debug inside a DLL when it is a COM server... if it is an extension DLL, I can do it the normal way.
Try the suggestion of using __asm int 3. The causes the processor to break its execution at that point.
Jaime
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Using __asm int 3 would be useful if i knew assembler.
This all used to work, but now it doesnt. My project is a DLL and the exe that loads it doesnt ahve a symbol table, but this used to work.
Any other suggestions?
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by using __asm int 3 it isn't necessary to know assembler since you will see pure C code if the DLL has been compiled with symbol table.
You told that the EXE that loads the DLL doesn't have a symbol table, so you need to specify it in debug settings of the DLL project.
You always have talked about a DLL, but.. what kind of DLL it is? how have you specified the EXE that loads your DLL?
Jaime
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I have installed Win98/WindowsXP/Windows 2003
How can i retrieve boot drive in MFC
Thanking you
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MFC couldn't care less about the "boot drive." What you want can be obtained by reading the SystemDrive environment variable, or the same-named member of the Win32_OperatingSystem WMI class. You could also call GetWindowsDirectory() and examine the first character of the returned path. Do any of those help?
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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GetWindowsDirectory() API return only drive name where windows is installed.
I want to get the information for boot partition.
C:\Windows\ for 98
D:\Windows\ for XP
E:\Windows\ for 2K3
I want to get boot drive (c in winXP programatically.
Thanking you
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