C / C++ / MFC

10-Sep-10 7:05

I have something along the lines of:

typedef CList<MyObjPtr, MyObjPtr> PTRLIST;

MyObjPtr pMyObj1 = CreateObject();

PTRLIST* myList = new PTRLIST;
if(pMyObj1 && pMyObj1->isValid())
myList->AddTail(pMyObj1);

I know the pointer is valid and the list is empty, but when I try to add to the tail I get an exception. I traced it to where it's trying to new a new node.

Any ideas?

CPallini10-Sep-10 7:51

CPallini

10-Sep-10 7:51

What kind of exception did you get?
Could you post the erro message?
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VentsyV10-Sep-10 8:01

10-Sep-10 8:01

Memory access violation 0x000...5

David Crow10-Sep-10 8:10

David Crow

10-Sep-10 8:10

Have you tried narrowing the problem down to just the code you've shown? I tried the following (with a few syntactical changes) and it worked:

typedef struct _MyObjPtr
{
public:
    BOOL isValid( void ) { return 1; }
} *MyObjPtr;

typedef CList<MyObjPtr, MyObjPtr> PTRLIST;

MyObjPtr pMyObj1 = new _MyObjPtr; // = CreateObject();

if (pMyObj1 && pMyObj1->isValid())
{
    PTRLIST* myList = new PTRLIST;
    myList->AddTail(pMyObj1);
}

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VentsyV10-Sep-10 8:33

10-Sep-10 8:33

I stepped through the code and it's narrowed to pretty much that. The AddTail is calling NewNode which it appears is trying to deference the pointer.

In afxtempl.h NewNode function (Line 931)

::new( (void*)( &pNode->data ) ) TYPE;

And it fails there.

VentsyV10-Sep-10 9:18

10-Sep-10 9:18

I used CTypedPtrList<cptrlist, myobjptr=""> PTRLIST; and that seems to be working.

Print a FormView

Shivanand Gupta10-Sep-10 2:25

10-Sep-10 2:25

Hi
my program print a form-view correctly if it does not have scroll bar.
if scroll bar is present then we can print only visible area of scroll bar.

But i need to print full form-view with all control .
i.e. scroll bar should not be effect on print procedure.

many sample available but no one fulfill above requirement.

Richard MacCutchan10-Sep-10 5:21

Richard MacCutchan

10-Sep-10 5:21

The view that you see on the screen is merely one 'page' which you can scroll up, down, left and right. After each scroll operation the view is repainted to show just the data within the current view. In order to print all pages you need to add some similar print logic to your program which will iterate through all your data formatting it correctly to the printer device of your choice.

It's time for a new signature.

bob1697210-Sep-10 8:30

bob16972

10-Sep-10 8:30

Here is an old post of mine that describes printing in MFC in a generic way. It was written for CScrollView but I'm hoping it'll help regardless...Printing Sample[^]

Shivanand Gupta11-Sep-10 8:31

11-Sep-10 8:31

Thanks for response
it work good but, my requirement is still open.

my form view have many control and scroll bar hide some control so
how can print full image of form view.

bob1697214-Sep-10 3:23

bob16972

14-Sep-10 3:23

How are you trying to print it now. What does your "Draw" code look like? (small snippet)

Shivanand Gupta14-Sep-10 5:31

Re: CComboBox lost focus!

14-Sep-10 5:31

fine,

I could not print formview properly that have scroll bar.

so i remove scroll bar.

CComboBox lost focus!

Arrin10-Sep-10 2:21

Arrin

10-Sep-10 2:21

Hi,

i have a CComboBox in my CDialog but after dialog is shown, CComboBox hide the cursor, caret!
Combo dont lose the focus, just hide the caret! Frown | :(

What to do to avoid this, is there any way for this, or is there any way to show caret in combobox again??

Thanks for any help
Arrin

Shivanand Gupta10-Sep-10 2:30