C / C++ / MFC

how to disable/enable menu items

12-Jun-07 13:44

led mike wrote:
"Code Project... best entertainment value on the Web!"

!!

I came close to opening that can of worms (the link) Smile | :)

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

vikramkarthik12-Jun-07 1:35

vikramkarthik

12-Jun-07 1:35

I want to disable and enable menu items depending on conditions. Say for eg.
if menu is

File Input Analysis Help

There are many items under each menu. If 1st item under File is clicked, Input menu has to be enabled.

Re: how to disable/enable menu items

Christian Graus12-Jun-07 1:49

Christian Graus

12-Jun-07 1:49

There's two messages attached to a menu item. One is a click event, the other is a callback, which is called just before it is shown, you set those things there.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: how to disable/enable menu items

Max Santos12-Jun-07 6:18

Max Santos

12-Jun-07 6:18

This is the best way:

<br />
BEGIN_MESSAGE_MAP(CYourFrame, CMainFrame)<br />
	ON_UPDATE_COMMAND_UI(ID_MENU_ITEM_1, OnUpdateMenuItem1)<br />
END_MESSAGE_MAP()<br />
<br />
//*******************************************************************************************<br />
void CYourFrame::OnUpdateMenuItem1(CCmdUI *pCmdUI)<br />
{<br />
  pCmdUI->Enable([TRUE or FALSE here depending on condition]);<br />
}<br />

Hope it helps

http://xwega.com

How to select a folder path in MFC?

Electronic7512-Jun-07 1:29

Electronic75

12-Jun-07 1:29

Hello, I tried to use CFileDialog to choose a folder path in my program but it this way user has to select a file and then I have to use GetFolderPath() to get the path but it may not be very sensible to user to select an arbitary file within a directory to select that directory on the other hand the directory can be empty that creates an additional problem. How can I open a dialog so user can select a folder path? is it possible to select from a tree structure of directories?
Thanks

_AnsHUMAN_ 12-Jun-07 1:52

_AnsHUMAN_

12-Jun-07 1:52

Electronic75 wrote:
How can I open a dialog so user can select a folder path?

Did you have a look at SHBrowseForFolder API.
It returns a pointer to an item identifier list (PIDL) specifying the location of the selected folder relative to the root of the namespace.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Electronic7512-Jun-07 2:39

Electronic75

12-Jun-07 2:39

Thanks alot _AnShUmAn_, though I have programmed for more than four years with MFC I still do not know some APIs and when I looked in help with keywords: "choose folder" it returned nothing useful. you helped me a lot god bless you.

JudyL_MD12-Jun-07 3:13

JudyL_MD

12-Jun-07 3:13

Electronic75 wrote:
though I have programmed for more than four years with MFC I still do not know some APIs

FYI, SHBrowseForFolder is not MFC, it is part of the Windows API - Windows Shell programming, to be specific

_AnsHUMAN_ 12-Jun-07 3:18

_AnsHUMAN_

12-Jun-07 3:18

My Pleasure Smile | :)

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

problem with setting bitmaps on propertysheet header and footer?

Max Santos12-Jun-07 6:22

Max Santos

12-Jun-07 6:22

Hello

Take a look, maybe what you nedd:

http://www.codeproject.com/dialog/cfolderdialog.asp[^]

http://xwega.com

Banks K12-Jun-07 1:08

Banks K

12-Jun-07 1:08

Hello All,

Actually i am using in my application "PropertyPage and PropertySheet" so i have to set bitmap on PropertySheet header and footer for every page so for that i am trying as follows:

constructor of my propertysheet class

CMyPropertySheet::CMyPropertySheet(CWnd* pParentWnd,
UINT iSelectPage, HBITMAP hWatermark, HPALETTE hpalWatermark,
HBITMAP hHeader)
: CPropertySheet(what i have to give caption ID here, pParentWnd, iSelectPage, hWatermark, hpalWatermark, hHeader)

and i am calling that as follows:
Bitmap bmWatermark;
CBitmap bmHeader;
if(!bmWatermark.LoadBitmap(IDB_BITMAP1))
return FALSE;
if(!bmHeader.LoadBitmap(IDB_BITMAP1))
return FALSE;

CMyPropertySheet MyPropSheet(NULL, 0, bmWatermark, NULL, bmHeader);

for this i am only unable to understand what i have to caption id into CPropertySheet(....) constructor if i am giving some integer than it got crashed

so if anybody have idea please share with me..........

thanks

Re: problem with setting bitmaps on propertysheet header and footer?

Mark Salsbery12-Jun-07 7:41

Passing threa point in different dialog

12-Jun-07 7:41

The ID would be a resource ID of the string resource to use as a caption.
There's also a constructor that takes a LPCTSTR so you could pass something like _T("My Caption").

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

kcynic12-Jun-07 1:00

12-Jun-07 1:00

I have a class derived from CWinThread, which have a CWnd* member which would recieve message from the thread. In the class also has a socket member,it would send network message to the CWnd* member.

I use such class in a Dialog,it works well.But when the main dialog create a new child dialog and show it using DoModal() function, and I want to make the child dialog correspond to the thread message and network message. In the child dialog,I send data to somewhere,but the class does send the data when the child dialog closed. Why?
Thanks

Good Luck.

Mark Salsbery12-Jun-07 7:45

12-Jun-07 7:45

I don't completely understand what you're doing but...

The window used for socket notifications doesn't have to be a visible window that the user can
interact with. It does, however, need to be created on a thread that has a message loop (your
CWinThread will provide that). If you create the window/dialog on another thread than your
CWinThread then it's possibly not going to work.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

kcynic12-Jun-07 8:16

12-Jun-07 8:16

I am trying the example of this web quote: http://www.flounder.com/kb192570.htm[^]

It really works well.but wen I using the ClientThread in another dialog,such problem occur.
I do not know why

Mark Salsbery12-Jun-07 8:51

12-Jun-07 8:51

Does it work if the dialog is modeless?

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

kcynic12-Jun-07 12:29

12-Jun-07 12:29

It works well when there only one dialog.
If create a model dialog,the data you sent in the new dialog did really be send when the new dialog was closed

Mark Salsbery12-Jun-07 13:42

12-Jun-07 13:42

I'm not sure if it will work in a modal dialog.

If you're using sockets notifications to a window then that should be in one place.
You should be able to leave it in your main window.dialog.

I'm not sure completely how Mr Newcomer implemented his socket notifications in the article
you referred to. It may not work in a modal dialog. In general, a modal dialog is a bad place
for this kind of thing.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

kcynic12-Jun-07 15:13

12-Jun-07 15:13

I think the thread or the socket would be blocked during the second dialog is active,perhaps.
But,if it so,I want to know,if is a modeless dialog,the socket and the thread would not be blocked?
In fact,the socket was create and connect to the server in the initialize function of the thread.So,I want to using the same socket so that it would not be created and connect to server again.
Would you like to tell me,how to resolve my aim or such problem?
Thanks.

Best Wishes

kcynic12-Jun-07 20:49