C / C++ / MFC

Managed C++ Type Independant List

12-Feb-02 9:02

Thanx again!

Cheers!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Steve Severance11-Feb-02 19:12

Steve Severance

11-Feb-02 19:12

I am trying to implement a type independant linked list in C++ for use in a C# program. The problem I have is that I have a class ListItemType that holds the data. I need to derive a class from this class in order to hold the lists data. I need to access the members of the derived class with a virtual function that is specifically coded for that class. Is there a way to cast it in C# so that this is possible? Secondly is there a better way to do this? Thanks.

Code follows:
public __gc class ListItem : public Object
{
public:
ListItem(Object *Obj);
void Delete();
bool isUsingSubItems;
int index;

ListItem *pNext;
ListItem *pPrev;
Object *pObject;
};

public __gc class LinkedList
{
public:
LinkedList();

void AddItem(Object *Obj);

Object *FindItem(Object*Obj);//Used to search the root object in each item
virtual Object *FindSubItem(Object *rootObj,Object *Obj) = 0;//Must be
// custom defined each time for the particulars of the list;

Object *GetAt(int index);
int GetIndex(Object *Obj);

void DeleteItem(Object *Obj); //Find a node and delete it
void DeleteList();//delete the whole list

void SetType(Type *type);

int GetNumItems(){return iNumItems;}//
void SetTypeSafe(){bTypeSafe = true;}
bool isTypeSafe(){return bTypeSafe;}
protected:
int iNumItems;
Type *pObjectType;
bool bTypeSafe;

protected:

ListItem *pListHead
ListItem *pListTail;

};

Steve

Not all who wander are lost...

Looking for a vector graphics library...

11-Feb-02 19:05

Does anyone know of a commercial vector graphics library (compatible with MFC/VC++)? I need to use vector icons in a certain format (whichever the library requires) to display in a CView. I have been looking all over the net, but have not found anything decent.

Thanks.

Re: Looking for a vector graphics library...

Rick York11-Feb-02 19:27

Rick York

11-Feb-02 19:27

This article might help.

My jokes page

Keyboard Processing without TranslateMessage?

clintsinger11-Feb-02 18:37

clintsinger

11-Feb-02 18:37

Hi,
I am making a plug-in for a game that I have and I want to be able to get the keyboard input from a dialog box I have created.
The dialog is created with CreateDialog() and I have passed it a CallbackProc parameter. From that callback I can capture all the messages except the keyboard input, which are happening in an edit control. I am really interested in knowing when I press return key in that edit control so I can behave the same way as having pressed the OK button.

Please Help,
Clint

PS. If any of this was unclear let me know because I really want to figure this out.
Rose | [Rose]

alex.barylski11-Feb-02 18:55

11-Feb-02 18:55

Dialogs don't let you process keystrokes...?

I did not know that...

However...You acn probably capture all the messages you desire using SetWindowsHookEx().

Laterz!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Nish Nishant11-Feb-02 19:51

11-Feb-02 19:51

HockeyDude wrote:
Dialogs don't let you process keystrokes...?

I did not know that...

In a dialog based application the focus will always be on one of the child controls and not on the main dialog.

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

alex.barylski12-Feb-02 8:52

12-Feb-02 8:52

Nish [BusterBoy] wrote:
In a dialog based application the focus will always be on one of the child controls and not on the main dialog.

I didn't even think of that.

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Nish Nishant11-Feb-02 19:50

11-Feb-02 19:50

Read this article :-

http://www.codeproject.com/useritems/pretransdialog01.asp

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

clintsinger13-Feb-02 15:50

clintsinger

13-Feb-02 15:50

Do you have any idea how I would do this without MFC and without any explicit message pump?

The create dialog only takes a handle to a CallbackProc and sends the dialog messages through that. I don't have any explicit access to the message loop (as far I as I know) to be able to intercept the keyboard input on the edit box child window.

I suppose if there is no other way I could explicitly create a thread and message pump to go with a CreateWindow but I would rather not put forth so much effort if there is a simpler way. Wink | ;)

Nish Nishant13-Feb-02 16:45

13-Feb-02 16:45

Well if you don't use MFC I assume you'll have something like this :-

while (GetMessage(&msg, NULL, 0, 0))
{
    if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
}

Now you can put your code just above the call to TranslateMessage()

Regards,
Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

print out with color syntax

clintsinger13-Feb-02 20:08

clintsinger

13-Feb-02 20:08

The thing is that I don't have a message pump. Just a callback procedure. Is there anyway to collect child window messages into that callback procedure?

tbbooher11-Feb-02 18:34

tbbooher

11-Feb-02 18:34

Hello -- so now that I have a good working code -- I want to show it off -- but if I print it out it loses all the pretty color syntax stuff. Here are my ideas:

(1) write a perl script that changes the code to some type of markup language
(2) drop the code in word and run a visual basic macro on it that does a bunch of find and replace runs

but I know that ya'll have a lot of great ideas out there . . . any that would make this little problem simpler?

thanks,

tim Smile | :)

---------------------------------------
Tim Booher

alex.barylski11-Feb-02 18:52

11-Feb-02 18:52

I always wondered why vc++ didn't supoort color syntax printing.. Confused | :confused:

I think you cou ld save yerself alot of work and use UltraEdit32, which supports many lanuages and can print with color syntax... Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

markkuk11-Feb-02 19:50

markkuk

11-Feb-02 19:50

a2ps can pretty-print to color PostScript. If you don't have a PostScript printer, you can output with Ghostscript

ilinov11-Feb-02 20:40

ilinov

11-Feb-02 20:40

Visit www.boost.org and download regex++ library. There is an example in the library that will help you to convert c++ source files in syntax colored html files.

With best regards,
Ivan

Shog⁹12-Feb-02 5:30

Shog⁹

12-Feb-02 5:30

Go and download SciTE. It's nice little editor that does syntax hilighting, printing, and even lets you copy "pretty" code to the clipboard in RTF format; nice for pasting into code reviews, etc.

farewell goodnight last one out turn out the lights

Smashing Pumpkins, Tales of a Scorched Earth

Return Values, No Pointers

tbbooher12-Feb-02 15:46

tbbooher

12-Feb-02 15:46

sweet -- thanks -- I also learned that emacs will allow a "print postscript" which is really nice. thanks for all the help -- I have a lot of options now which are a lot better than my perl script idea.

thanks,

tim Smile | :)

---------------------------------------
Tim Booher

Josh Koppang11-Feb-02 18:16

Josh Koppang

11-Feb-02 18:16

I have a web-device that is running Windows CE 3.0 embedded. I've made a small webserver like application that allows me to type in it's IP address and view the webpages that I have set up on it.

I'm using a COM wrapper to wrap the low level C code. I instantiate the COM object with server side JavaScript (because there is no support for ASP), and perform the operations on the machine through the COM object.

Finally... Here's the problem: Whenever I call the functions to interact with the machine, the result I always get is 0 (S_OK). Even though I specify one of the parameters as [out, retval]. How do I call COM methods, that you usually pass a pointer to, from JavaScript and ASP, that do not have pointers?

Any help would be appreciated.

There's a fine line between confidence and arrogance.

Nish Nishant11-Feb-02 19:53

11-Feb-02 19:53

joshkoppang wrote:
How do I call COM methods, that you usually pass a pointer to, from JavaScript and ASP, that do not have pointers?

Dunno about JavScript, but in ASP you can pass arguments ByRef. Same as in Client side VBScript

Nish

Nish was here, now Nish has gone;
He left his soul, to turn you on;
Those who knew Nish, knew him well;
Those who didn't, can go to hell.

I like to Jig | [Dance]

on the Code Project

Sonork ID 100.9786 voidmain
www.busterboy.org

Josh Koppang11-Feb-02 20:10

Josh Koppang

11-Feb-02 20:10

Nish [BusterBoy] wrote:
Dunno about JavScript, but in ASP you can pass arguments ByRef. Same as in Client side VBScript

How?

There's a fine line between confidence and arrogance.

Le centriste12-Feb-02 9:52

Le centriste

12-Feb-02 9:52

C++

BSTR bsOutRetval;
HRESULT hr = myCOMObj->SomeMethod(&bsOutRetval);
....
SysFreeString(bsOutRetval);

Dim sOutRetval As String
sOutRetval = myCOMObj.SomeMethod();

If you don't grab it, I can explain more.

Michel