Are there inheritance issues with static members? - C / C++ / MFC Discussion Boards

Amit Dey19-Mar-03 13:16

19-Mar-03 13:16

Hello all,

I'm using a CListView class in report mode,in my splitter window.When I'm trying to insert items, I see that although I can add the first item data, I cannot see other items(i.e. I can see Hello and the World column, but no entry under it. Help??

//Precreate window -
//cs.style |= LVS_REPORT|LVS_SORTASCENDING; //set list styles

//then

InsertColumn(0,IDS_HELLO);
InsertColumn(1,IDS_WORLD);

CString szHello("Hello");
CString szWorld("World");

CListCtrl& list = GetListCtrl();
ZeroMemory((void*) &Item, sizeof(Item));
Item.mask = LVIF_TEXT;
Item.iItem = 0;
Item.iSubItem = 0;
Item.pszText = (LPTSTR)(LPCTSTR)szSubject;
list.InsertItem(&Item);

list.SetItemText(0,1,(LPTSTR)(LPCTSTR)szWorld);

Hush,hush...
thought I heard you call my name now.

Kula Shaker.

Amit Dey
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Re: listview problem

Michael Dunn19-Mar-03 15:48

Michael Dunn

19-Mar-03 15:48

Turn off the sort style, does it work then? If so, then the item you insert isn't ending up at index 0 because of sorting. You need to save the return value from InsertItem() which is the index that the item is actually inserted at, and use that index in the SetItemText() call.

--Mike--
THERE IS NO THERE IS NO BUT THERE IS MAGIC PIXIE DUST BUSINESS GENIE CODE PROJECT

Homepage | RightClick-Encrypt | 1ClickPicGrabber
If privacy is outlawed, only outlaws will have privates.

Re: listview problem

Amit Dey20-Mar-03 11:11

Amit Dey

20-Mar-03 11:11

No, Mike, that did not solve it. I took another llok at the MFC rowlist sample, and it only works when I first enter the first item for all rows via InsertItem(), and then do SetItemText() for subitems. But no matter what I do, I can never make 'real' per row basis item insertion...ie an InsertItem() followed by SetItemText() for sub items before moving on to the next row.??

I have tried both CListCtrl::xxxx as well as ListView_xxx functions, but nothing works. Confused | :confused:

Hush,hush...
thought I heard you call my name now.

Kula Shaker.

Amit Dey
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Strange dll Problem

Anders Molin19-Mar-03 13:14

Anders Molin

19-Mar-03 13:14

I'm working with this third party SDK, which consists of a dll some headerfiles and a couple of lib files.
The SDK is written in VC6.

If I use it from a normal MFC application I have no problems.
From an ATL exe, no problems.
From an ATL dll, bang! Unresolved externals. There is something strange going on that makes the linker go kinda crazy Frown | :(

Any ideas?

Maybe I should add that the SDK is written in C++, not C. It uses classes as parameters in functions Dead | X|

[edit]
Here is the errors from the linker

MPDOKManager.obj : error LNK2001: unresolved external symbol "char const * const dok::szSDKVersion" (?szSDKVersion@dok@@3PBDB)
MPDOKManager.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall CObserver::~CObserver(void)" (??1CObserver@@UAE@XZ)
MPDOKManager.obj : error LNK2019: unresolved external symbol "protected: __thiscall CObserver::CObserver(void)" (??0CObserver@@IAE@XZ) referenced in function "protected: __thiscall dok::CDOK::CDOK(class dok::CDOK const &)" (??0CDOK@dok@@IAE@ABV01@@Z)
Debug/test.dll : fatal error LNK1120: 3 unresolved externals

[/edit]

- Anders

Money talks, but all mine ever says is "Goodbye!"

Add network printer

Anonymous19-Mar-03 12:00

Anonymous

19-Mar-03 12:00

How do you create a connection to a shared network printer and set it as default. I love C, but need to create logon "scripts" without the script. No VBS, please!

Re: Add network printer

Brian Shifrin19-Mar-03 13:58

Brian Shifrin

19-Mar-03 13:58

>How do you create a connection to a shared network printer

Umm, U can try to map it... WNetAddConnectionX, NetUse*

>and set it as default.
Let me guess: SetPrinter? Smile | :)

Brian

DIB Engine limitation

Tony Teveris19-Mar-03 11:10

Tony Teveris

19-Mar-03 11:10

Does any one have any idea if GDI+ or the XP OS extends the size of a DIB in the GDI to better then 32K ?

Thanks in advance

Tony Teveris
tteveris@gspinc.com
Gerber Scientific Products
Senior Software Engineer
Phone: 860 648 8151
Fax: 860 648 8214
83 Gerber Road West
South Windsor, CT 06074

Are there inheritance issues with static members?

adonisv19-Mar-03 10:56

adonisv

19-Mar-03 10:56

I've got my declaration of canal tree which has a static array of ID's of icons. I then derive another tree control class from canal tree called RPhysicalTree. I then derive andother class from RPhysicalTree called SacmanSetUpTree. When I compile, I keep getting a linker error. I've delcared and defined the array correctly. What's up? Confused | :confused:

--------------------Configuration: SacmanSetupProgram - Win32 Debug--------------------
Compiling...
RCanalTree.cpp
d:\data\vss\coderesearch\sacmansetupprogram\debug\msado15.tlh(409) : warning C4146: unary minus operator applied to unsigned type, result still unsigned
Generating Code...
Skipping... (no relevant changes detected)
rphysicaltree.cpp
RSacmanSetupTree.cpp
Linking...
rphysicaltree.obj : error LNK2005: "public: static int * RCanalTree::m_icons" (?m_icons@RCanalTree@@2PAHA) already defined in RCanalTree.obj
RSacmanSetupTree.obj : error LNK2005: "public: static int * RCanalTree::m_icons" (?m_icons@RCanalTree@@2PAHA) already defined in RCanalTree.obj
Debug/SacmanSetupProgram.exe : fatal error LNK1169: one or more multiply defined symbols found
Error executing link.exe.
SacmanSetupProgram.exe - 3 error(s), 1 warning(s) Cry | :((

#if !defined(AFX_RCANALTREE_H__18E8CD78_FD89_45EE_B60E_E483A7A4520A__INCLUDED_)<br />
#define AFX_RCANALTREE_H__18E8CD78_FD89_45EE_B60E_E483A7A4520A__INCLUDED_<br />
<br />
#if _MSC_VER > 1000<br />
#pragma once<br />
#endif // _MSC_VER > 1000<br />
// RCanalTree.h : header file<br />
//<br />
#include "resource.h"<br />
#include "CanalManager.h"<br />
<br />
enum EnumTreeItems { TI_NONE,TI_SYSTEM,TI_SEGMENT,TI_SITE,TI_CANAL,TI_TURNOUT,<br />
	TI_PUMP,TI_WELL,TI_ORDER_FOR_PUMP,TI_ORDER_FOR_TURNOUT,TI_ORDER_FOR_WELL,<br />
	TI_AUTOMATIC_CONTROL,TI_CENTRAL_CONTROL,TI_CENTRAL_FLOW,TI_LOCAL_FLOW,<br />
	TI_LOCAL_LEVEL,TI_MANUAL_CONTROL,TI_CONTROLLERS,TI_SSFC,TI_MC_SITE,<br />
	TI_CV_SITE,TI_LLC_SITE,TI_LFC_SITE,TI_SCHEDULING};<br />
<br />
enum EnumForOnCheck { CHECK_OKAY, CHECK_IGNORED, CHECK_REPOPULATE };<br />
<br />
/////////////////////////////////////////////////////////////////////////////<br />
// RCanalTree window<br />
<br />
class RCanalTree : public CTreeCtrl<br />
{<br />
// Construction<br />
public:<br />
	RCanalTree(CCanalManager *pCanMan=NULL);<br />
<br />
// Attributes<br />
public:<br />
	const CCanalManager* GetCanalManagerPointer() { return m_pCanMan; }<br />
	void SetCanalManagerPointer(CCanalManager *pCanMan) { m_pCanMan=pCanMan; }<br />
<br />
// Operations<br />
public:<br />
	virtual void Populate();<br />
	int DeleteChildren(HTREEITEM hParent);<br />
	static int m_icons[];<br />
	HTREEITEM GetDepthNextItem(HTREEITEM hItem);<br />
	HTREEITEM FindItem(const char *name, int dwData);<br />
	HTREEITEM InsertChildItem(const char *name, int dImage, HTREEITEM hParent, DWORD data, int iCheck=-1, bool bCondition=true);<br />
<br />
// Overrides<br />
	// ClassWizard generated virtual function overrides<br />
	//{{AFX_VIRTUAL(RCanalTree)<br />
	//}}AFX_VIRTUAL<br />
<br />
// Implementation<br />
public:<br />
	int GetIconIndex(int idOfIcon);<br />
	int GetImageIndexFor(int idOfIcon);<br />
	bool DeleteChildItem(HTREEITEM hParent, const char* name, DWORD data);<br />
	virtual void UpdateImages();<br />
	virtual EnumForOnCheck OnCheck(HTREEITEM hItem, bool bNowChecked);<br />
	virtual ~RCanalTree();<br />
<br />
	// Generated message map functions<br />
protected:<br />
	bool IsScheduleLocked();<br />
	CCanalManager* m_pCanMan;<br />
	//{{AFX_MSG(RCanalTree)<br />
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);<br />
	//}}AFX_MSG<br />
<br />
	DECLARE_MESSAGE_MAP()<br />
};<br />
<br />
/////////////////////////////////////////////////////////////////////////////<br />
<br />
int RCanalTree::m_icons[] = {	<br />
	IDI_ICON_SYSTEM,			<br />
	IDI_ICON_CANAL,				<br />
	IDI_ICON_SITE,				<br />
	IDI_ICON_WELL,				<br />
	IDI_ICON_TURNOUT,			<br />
	IDI_ICON_PUMP,			<br />
	0 // NULL place holder used to terminate the array.<br />
};<br />
<br />
//{{AFX_INSERT_LOCATION}}<br />
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.<br />
<br />
<br />
<br />
#endif // !defined(AFX_RCANALTREE_H__18E8CD78_FD89_45EE_B60E_E483A7A4520A__INCLUDED_)

Re: Are there inheritance issues with static members?

Michael Dunn19-Mar-03 11:13

Michael Dunn

19-Mar-03 11:13

Move the definition of the array to a CPP file. The way it is currently, one m_icons array is defined for every CPP file that includes that header, which leads to the linker error

--Mike--
THERE IS NO THERE IS NO BUT THERE IS MAGIC PIXIE DUST BUSINESS GENIE CODE PROJECT

Homepage | RightClick-Encrypt | 1ClickPicGrabber
"Which comes first, the bug or the stress?" -- Chris Maunder

You Dah Maaaaaaan!

adonisv19-Mar-03 11:33

adonisv

19-Mar-03 11:33

I thought I had tried that, many times. Oh well, thanks dooood! Laugh | :laugh:

Activex-programming....multi choice...

ZarrinPour19-Mar-03 10:46

ZarrinPour

19-Mar-03 10:46

Hi:
I'm beginner in activex programming with VC++ and i have a problem!
How can i create a multi-choice property for an activex control !!!!?
for example suppose an activex have a property with following features (through ClassWizard)

External Name : BorderStyle
Type : CString (for example)
Variable Name : m_borderStyle
Notification Function : OnBorderStyleChanged
Implementation : Member Variable (Radio Button)

and this property have some value such as (note that : more than three property !!! this is very important for me)
1) None
2) Flat
3) Static_Edge
4) Three_D
5) Button_Edge
6) Client_edge
and etc.
Now i want show this values in a drop-down list in the "ALL" Activex's property sheet and user select one of them
from it.
Please help me.
My english isn't very well, please excuse me for bad comments.
Thanks a lot.

Re: Activex-programming....multi choice...

Brian Shifrin19-Mar-03 11:03

Brian Shifrin

19-Mar-03 11:03

I don't think you can directly....

Manually edit idl place something like:

typedef [uuid(8216ACE0-8C0F-40AF-AA1E-5E988573C582)]
enum {
[helpstring("1 - bsNone")] bsNone = 1,
[helpstring("2 - bsFlat")] bsFlat = 2,
[helpstring("3 - bsStatic_Edge")] bsStatic_Edge = 3,
.....
}BorderStylesConstants;

....
Change interface to look like...
[id(44444), propget] HRESULT SetStyle(BorderStylesConstants borderStyle);

passing pointers from DLL to VB to DLL

IGeorgeI19-Mar-03 10:32

IGeorgeI

19-Mar-03 10:32

Here is what I want to do

VB front end is main app
DLL # 1 creates an array of doubles
DLL # 2 performs some task on an array of doubles passed to it

Vb frontend will get a pointer to an array of doubles (double * array) from DLL #1 and pass the pointer to DLL #2 which accepts pointers to arrays of doubles.

How do I get VB to do this ie. recognize what a pointer to a array of doubles is??????

Thanks in advance for all help

Re: passing pointers from DLL to VB to DLL

FlorianS19-Mar-03 10:46

FlorianS

19-Mar-03 10:46

Between dll's you can pass pointer like long value and inside the second dll you can assign this long to the real pointer and do the conversion

Re: passing pointers from DLL to VB to DLL

IGeorgeI19-Mar-03 11:37

IGeorgeI

19-Mar-03 11:37

Thanks for the reply.

I thought about that but my ploblem is that the 2nd DLL(receiving the pointer) must have a (double*) as it's parameter. I can not redeclare the function to accept "void pointers". If I could, I would.

Any other suggestions?

Cry | :((

NTService and Hooks

FlorianS19-Mar-03 9:30

FlorianS

19-Mar-03 9:30

Is it possible to add a hook to keyboard from a services
I want to add the hook when the service is starting and remove the hook when the service is stop.
I tried but the hook can not be installed.

Thanks
Florian

Re: NTService and Hooks

Joan M20-Mar-03 4:58

Joan M

20-Mar-03 4:58

Yes you can, the only thing that you must consider is that a system wide keyboard hook must be placed inside a DLL.

Then you should create a DLL that contains the hook (the callback function) and remember that the service must have a mesage pump.

If you have more questions or if I have not been so clear, (or if I've completely missed the shot) don't mind to ask again.

Hope this helps...

Loading bitmaps?

clintsinger19-Mar-03 9:16

clintsinger

19-Mar-03 9:16

Hi Everyone,

I have an application that is designed to load an image from the database. This image is in a compressed form like png, jpeg etc. I was wondering what is the process to loading the bitmap if it is already in memory (ie. not loading it from the disk)? Should I use something like FileMaps or something else?

Cheers,
Clint Smile | :)

Re: Loading bitmaps?

C^hris L^osinger19-Mar-03 9:27

C^hris L^osinger

19-Mar-03 9:27

there are a half-dozen articles on CP that handle image I/O. most of them can handle memory-based images. look in the "Bitmap and Palettes" section.

-c

Image tools: ThumbNailer, Bobber, TIFFAssembler

Re: Loading bitmaps?

clintsinger19-Mar-03 9:43

clintsinger

19-Mar-03 9:43

Hi Chris,

I did go through them, unfortunately they deal with their own classes. I would like to be able to use CImage (which supports decompressing png) from the MFC library. So what I need to know is how do I tell windows that this compressed png file is in memory and not on disk without having to save a temp file to disk?

Cheers,
Clint

Re: Loading bitmaps?

C^hris L^osinger19-Mar-03 10:57

C^hris L^osinger

19-Mar-03 10:57

i'm not familiar with CImage, but the MSDN says its Load method can take an IStream interface. so, you could hook up some kind of IStream-based COM object to read your memory-based image. (yeah, yuck)

-c

Image tools: ThumbNailer, Bobber, TIFFAssembler

How get the path of Internet Explorer (executable) or any APP.EXE ??

Cris19-Mar-03 9:12

Cris

19-Mar-03 9:12

How could I get the path of a APP.EXE ??
I need to open a Site with Internet Explorer browser. I have used the GetModuleFileName function, but I don't have the HMODULE parameter (to get HMODULE, the GetModuleHandle function also doesn't work).
Any idea ??

Thanks,
Cris.

Re: How get the path of Internet Explorer (executable) or any APP.EXE ??

Amit Dey19-Mar-03 13:19

Amit Dey

19-Mar-03 13:19

GetModuleHandle(NULL); ?

Hush,hush...
thought I heard you call my name now.

Kula Shaker.

Amit Dey
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Re: How get the path of Internet Explorer (executable) or any APP.EXE ??

Big Art20-Mar-03 6:27

Big Art

20-Mar-03 6:27

Hello There!

If the app was put on your computer with an installer you don't need the path because it is registered in the registery automatically. You can just provide the name of the executable in ShellExecute(..) and it will launch the app.

However if you insist on getting the path use this:

char szRegBuf[200];
DWORD pcbData=199;

if(!::SHGetValue(HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\TheExecutable.exe","Path",(LPDWORD)REG_NONE,szRegBuf,&pcbData))
{
AfxMessageBox("Successfuly located TheExecutable.exe path in the registry");
}

Re: How get the path of Internet Explorer (executable) or any APP.EXE ??

Cris20-Mar-03 7:07

Cris

20-Mar-03 7:07

Ok, and abount the SHGetValue function ?? Where it is declared ??

[]'s

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