C / C++ / MFC

Re: adding checkbox to submenu item

22-Dec-09 23:43

If you go through MENUITEMINFO structure (which is used in InsertMenuItem() function) you can find fMask member which supports MIIM_CHECKMARKS value.

Code-o-mat23-Dec-09 3:13

Code-o-mat

23-Dec-09 3:13

CMenu::GetSubMenu[^] and CMenu::CheckMenuItem[^] might help you with that...

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

Reg - Edit Box

Paulraj G22-Dec-09 22:50

Paulraj G

22-Dec-09 22:50

Hi...

Hi i am having a multiline text box.

Initially i have some data in edit box. Then if i add any data, the previous datas are gone. i want both previous and current data.

For example, I am Having "This is Test \r\n This is multiline text box".

if i add "This is second line", the editbox should show both data.

How to do...

Please help me.

I used,

CString str1 = "Some String"; 
GetDlgItemText(IDC_EDIT1, str);
str2 = str+str1;
SetDlgItemText(IDC_EDIT1, str2);

Please tell me is there any otherway....

G.Paulraj

Re: Reg - Edit Box [modified]

KingsGambit22-Dec-09 23:17

22-Dec-09 23:17

You can try EM_REPLACESEL message.

CString cs;
GetDlgItemText(IDC_EDIT1, cs);

SendDlgItemMessage(IDC_EDIT1, EM_SETSEL, cs.GetLength(), cs.GetLength());
SendDlgItemMessage(IDC_EDIT1, EM_REPLACESEL, 0, (LPARAM)_T("Some String"));

modified on Wednesday, December 23, 2009 5:34 AM

Rajesh R Subramanian22-Dec-09 23:22

22-Dec-09 23:22

Good suggestion. Smile | :)

“Follow your bliss.” – Joseph Campbell

KingsGambit22-Dec-09 23:34

Re: Reg - Edit Box [modified]

22-Dec-09 23:34

Thank you! Smile | :)

Rajesh R Subramanian22-Dec-09 23:42

22-Dec-09 23:42

OK you modified that post. While I thought the EM_REPLACESEL itself was a great idea, I wouldn't have liked the usage of GetDlgItem() call. But hey, different people, different ways. (why I don't like GetDlgItem()? Because I'm a terrific fan of Dr. Joseph Newcomer, and his philosophies and I take 'em seriously).

Added: Look at my second answer to the OP. Smile | :)

“Follow your bliss.” – Joseph Campbell

modified on Wednesday, December 23, 2009 5:48 AM

KingsGambit22-Dec-09 23:52

22-Dec-09 23:52

Me too don't like to use GetDlgItem(). It is always better and clean to use binded members with DDX/DDV. I thought I would provide an answer which resembles the sample code segment in the post Smile | :)

. Thanks for the comment.

LunaticFringe23-Dec-09 6:33

LunaticFringe

23-Dec-09 6:33

Rejeesh.T.S wrote:
Me too don't like to use GetDlgItem(). It is always better and clean to use binded members with DDX/DDV.

You do realize, of course, that DDX_ macros internally call GetDlgItem? Newcomer's screed on the subject overlooks that fact. It really comes down to personal preference in coding style; one way is no more evil than another. Personally I try to avoid MFC-specific API's where possible - it makes porting code between frameworks a little less painful.

L u n a t i c F r i n g e

Rajesh R Subramanian22-Dec-09 23:21

22-Dec-09 23:21

Use a control type member variable for the edit control. Then do something like

m_Edit.GetWindowText(szTemp );
szTemp += _T("Whatever");
m_Edit.SetWindowText(szTemp);

“Follow your bliss.” – Joseph Campbell

Rajesh R Subramanian22-Dec-09 23:48

22-Dec-09 23:48

Hi,

You might want to try this (thanks to Rejeesh for his EM_REPLACESEL suggestion, which triggered this idea)

int len = m_Edit.GetWindowTextLength(); //find the length of text in the control
m_Edit.SetSel(len, len, 0);     //select nothing (but the cursor goes to the end)
m_Edit.ReplaceSel(szNewText);   //new text will be printed at the end now!

“Follow your bliss.” – Joseph Campbell

KingsGambit22-Dec-09 23:54

22-Dec-09 23:54

This is the MFC way. Now the code looks cleaner Smile | :)

Object reference not set to an instance of an object.

Paulraj G23-Dec-09 0:27

Paulraj G

23-Dec-09 0:27

Sorry for deleyed reply...

Thanks for Both of you...

the problem has been solved...

G.Paulraj

Anu_Bala22-Dec-09 22:29

Re: Object reference not set to an instance of an object.

22-Dec-09 22:29

After converting my project from VC6.0 to VS2008.Im getting continouly error.I dont have error in building the exe.
When im running this exe i got lot of errors.Mostly on System.AccessViolation,System.NullRefernceException like this.Now i get

An unhandled exception of type 'System.NullReferenceException' occurred in InstructorStation.exe

Additional information: Object reference not set to an instance of an object.

error in this fucntion.

void CMainFrame::UpdateOprs(CTrans *pData)
{
IsNewOpr = TRUE;
WriteDebug("UpdateOprs() - Begin");
.
.
}

THis function get called as follow
CTrans tData;
CMainFrame* tFrm = (CMainFrame*)AfxGetMainWnd();
for(i=0;i<LiveDataCount.Count;i++)
tData.m_sData.Insert(i,LiveArray[i]);
tFrm->UpdateOprs(&tData);

Whats the problem in converting?I thought converting project should be simple likethat.I don't know whether i did any wrong?
Pls guide me on this issue.

Anu

Adam Roderick J22-Dec-09 23:07

Adam Roderick J

22-Dec-09 23:07

CMainFrame* tFrm,
what is the value of tFrm?
Did u check whether it is 0 or not?

Please check

if( 0 != frm )

Величие не Бога может быть недооценена.

Re: Object reference not set to an instance of an object.

Anu_Bala22-Dec-09 23:23

Re: Object reference not set to an instance of an object.

22-Dec-09 23:23

While debugging,when i keep mouse on tFrm,it shows as undefined value.

Anu

Adam Roderick J22-Dec-09 23:27

Adam Roderick J

22-Dec-09 23:27

Please change your optimization in project settings to see the value of the variable.

Величие не Бога может быть недооценена.

Re: Object reference not set to an instance of an object.

Anu_Bala22-Dec-09 23:33

Re: Object reference not set to an instance of an object.

22-Dec-09 23:33

Sorry,what can i change?
properties->configuratio properties->c/c++->optimization->optimization: Custom
Shall i change to Fulloptimization(/Ox)

Anu

Anu_Bala22-Dec-09 23:59