Re: Dynamically Changing CComboBox From Dropdown To Droplist - C / C++ / MFC Discussion Boards

Rama Krishna Vavilala13-Jun-02 1:02

13-Jun-02 1:02

Here is how you fix it

1. Add a CWinApp derived class add InitIntance and ExitInstance functions.

2. Define _AFXDLL, _USRDLL

3. Move code from DllMain to appropriate InitInstance or ExitInstance method

4. Remove DllMain

Build and it will compile Smile | :)

Re: Add MFC support to ATL project

Nish Nishant13-Jun-02 1:23

Nish Nishant

13-Jun-02 1:23

Rama Krishna wrote:
1. Add a CWinApp derived class add InitIntance and ExitInstance functions.

2. Define _AFXDLL, _USRDLL

3. Move code from DllMain to appropriate InitInstance or ExitInstance method

4. Remove DllMain

Also set the linker option to link with MFC statically or dynamically

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Re: Add MFC support to ATL project

Rama Krishna Vavilala13-Jun-02 1:17

Rama Krishna Vavilala

13-Jun-02 1:17

Nish - Native CPian wrote:
Also set the linker option to link with MFC statically or dynamically

Defining _AFXDLL sets dynamic link.

Re: Add MFC support to ATL project

Nish Nishant13-Jun-02 1:31

Nish Nishant

13-Jun-02 1:31

Rama Krishna wrote:
Defining _AFXDLL sets dynamic link.

Woah! I didn't know that!

Thanks for these little snips of info Rama

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Dynamically Changing CComboBox From Dropdown To Droplist

John Clump13-Jun-02 0:45

John Clump

13-Jun-02 0:45

Hi everyone. I have a dialog with 2 combo boxes, one is for setting what kind of data which will be put into the second combo box. For example, "String" will set the data box into a dropdown were the user can type in a string, or "boolean", which would set the data box into a drop list (where there are two entires, "Yes" or "No". I want to be able to do this dynamically, as the user selects either "String" or "boolean".

I tried the following to set the data combobox from a dropdown to a drop list, with the dropdown already successfully created by default in the resource editor. When this code is run, the combo box font changed, the size of the box changed, and I could not set the drop down width to anything, and the width would be zero. The combobox did change to droplist though.

Is it possible to change the combobox from sropdown to drop list dynamically? Is there a correct way to do it, so I don't have to use an extra combobox? Thanks in advance for any help!

<br />
// pFrom is a pointer to a CComboBox control<br />
CRect rect;<br />
pFrom->GetWindowRect(rect);<br />
ScreenToClient(rect);<br />
<br />
pFrom->DestroyWindow();<br />
pFrom->Create(CBS_DROPDOWNLIST, rect, this, IDC_CBO_DATA);<br />
pFrom->AddString("Yes");<br />
pFrom->AddString("No");<br />
pFrom->SetCurSel(0);<br />
pFrom->ShowWindow(TRUE);<br />
pFrom->EnableWindow(TRUE);<br />
pFrom->SetDroppedWidth(70);<br />
<br />

Re: Dynamically Changing CComboBox From Dropdown To Droplist

Nish Nishant13-Jun-02 1:00

Nish Nishant

13-Jun-02 1:00

Unfortunately some styles are not changeable once the control has been created. This is one of them.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Buy it, read it and admire me Smile | :)

Re: Dynamically Changing CComboBox From Dropdown To Droplist

srinivas vaithianathan13-Jun-02 8:22

srinivas vaithianathan

13-Jun-02 8:22

if you cannot change the style workaround is have to two controls drowndown and droplist in the same place in the dialog and show the one you need

Re: Dynamically Changing CComboBox From Dropdown To Droplist

Phil J Pearson17-Jun-02 6:23

Phil J Pearson

17-Jun-02 6:23

You cannot change this style at runtime. You have the right idea: delete the combobox and create another with the appropriate style. First save all the relevant attributes of the original combo and stuff them into the new one when it's ready. I used the following code to change from DROPDOWN to DROPLIST:

// save all the relevant attributes of the existing combo, then destroy it and
// create a new one with CBS_DROPDOWNLIST style.
// (ModifyStyle(CBS_DROPDOWN, CBS_DROPDOWNLIST) won't work)
DWORD dwStyle = m_Combo.GetStyle();
DWORD dwExStyle = m_Combo.GetExStyle();
int nID = m_Combo.GetDlgCtrlID();
CWnd *pPrevWindow = m_Combo.GetNextWindow(GW_HWNDPREV);
CWnd *pParentWnd = m_Combo.GetParent();
CFont *pFont = m_Combo.GetFont();
m_Combo.GetWindowRect(rect);
pParentWnd->ScreenToClient(rect);
m_Combo.DestroyWindow();
dwStyle &= ~CBS_DROPDOWN;
dwStyle |= CBS_DROPDOWNLIST;
m_Combo.CreateEx(dwExStyle, "COMBOBOX", "", dwStyle, rect, pParentWnd, nID);
m_Combo.SetFont(pFont, FALSE);
m_Combo.SetWindowPos(pPrevWindow, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE);

Hope this helps,

Regards,
Phil

Re: Dynamically Changing CComboBox From Dropdown To Droplist

John Clump17-Jun-02 20:02

John Clump

17-Jun-02 20:02

Thanks! Your code worked great, except the dropdown height was not preserved, and I could not change it via SetDroppedWidth(). So the user could not see the "Yes" and "No" I put in the combobox. The font and such were preserved. Why couldn't I change the dropped width?

About WebBrowser control

sundararaman13-Jun-02 0:01

sundararaman

13-Jun-02 0:01

I am using CWebBrowser wrapper class to simulate web browser in my dialog based application. I am getting the browser. But menu bar and status bars are not visible. Is there any way to make it visible. I used setmenubar and other set functions to do that. But i am not getting the results. Please help.

sundar

a question in visual studio.net!

G.Richard12-Jun-02 23:49

G.Richard

12-Jun-02 23:49

how to modify the version info in the resource file, through vc7.net addin?
I want to auto increase the build version when building.

c++ : my dream

Re: a question in visual studio.net!

Rama Krishna Vavilala13-Jun-02 1:18

Rama Krishna Vavilala

13-Jun-02 1:18

There is one such Utility available at CP.

Re: a question in visual studio.net!

G.Richard13-Jun-02 21:42

G.Richard

13-Jun-02 21:42

thanks, let me see...

c++ : my dream

Current Directory run time

12-Jun-02 23:03

How could I know where my app program starting (absolute path)

Thank you so much for your kindness

Re: Current Directory run time

Renjith Ramachandran12-Jun-02 23:07

Renjith Ramachandran

12-Jun-02 23:07

try
GetCurrentDirectory ()

R_Renjith The True CP ian

Re: Current Directory run time

Fredrik Skog13-Jun-02 0:33

Fredrik Skog

13-Jun-02 0:33

GetModuleFileName

Cheers,
Fredrik

<right>Sonork ID: 100.11430:PhatBoy

'It is so much simpler to bury reality than it is to dispose of dreams.'

- Don Delillo, Americana

Re: Current Directory run time

Rama Krishna Vavilala13-Jun-02 1:32

Rama Krishna Vavilala

13-Jun-02 1:32

This will not give the current directory. This will give the full path of the executable which is not same as the current directory

Re: Current Directory run time

Fredrik Skog13-Jun-02 2:06

Fredrik Skog

13-Jun-02 2:06

He did not ask for the current directory, he wanted to know where his application starts (runs), and that is what I answered to.

Cheers,
Fredrik

<right>Sonork ID: 100.11430:PhatBoy

'It is so much simpler to bury reality than it is to dispose of dreams.'

- Don Delillo, Americana

Re: Current Directory run time

dazinith13-Jun-02 3:24

dazinith

13-Jun-02 3:24

this is how i do it:

// set the current working path to m_strWorkingPath
char curdir[_MAX_PATH]; 
if( _getcwd( curdir, _MAX_PATH ) == NULL )
{	AfxMessageBox("Unable to determine the current working directory");
	bInitSuccessful = FALSE;	}
m_strWorkingPath = (CString)curdir + "\\";

is GetModuleFileName() a better method?

i notice it returns the full path and executable..

-dz

Re: Current Directory run time

Fredrik Skog13-Jun-02 3:43

Fredrik Skog

13-Jun-02 3:43

GetModuleFileName can be used to retrieve the path of the running application, whereas _getcwd (and GetCurrentDirectory) can be used to retrieve the current directory.
The current working directory need _not_ be the same as the location of the running application.

Cheers,
Fredrik

<right>Sonork ID: 100.11430:PhatBoy

'It is so much simpler to bury reality than it is to dispose of dreams.'

- Don Delillo, Americana

Re: Current Directory run time

JohnnyG13-Jun-02 3:41

JohnnyG

13-Jun-02 3:41

Once you have the path of the running application, you can use _splitpath() and related functions.

Re: Current Directory run time

lucy13-Jun-02 5:00

lucy

13-Jun-02 5:00

wow, a function like this does exist there. What I did is:

TCHAR szBuff[_MAX_PATH];
::GetModuleFileName(AfxGetInstanceHandle(), szBuff, _MAX_PATH);
char ch = '\\';
char * pdest = strrchr(szBuff, ch);

to extract the application name from its full path.

Re: Current Directory run time

C^hris L^osinger13-Jun-02 5:07