C / C++ / MFC

7-Aug-03 0:15

I did following:

[code]
CMenu* pMenu = this->GetMenu();

CMenu* pFilterMenu =pMenu->GetSubMenu(1);// Filters

CCmdUI state;
state.m_pMenu = pFilterMenu;
state.m_nIndex = 0;/* 1 to nItems */

state.m_nID = pMenu->GetMenuItemID(state.m_nIndex); // now route to message maps

state.Enable(FALSE);

state.DoUpdate(this,false);
//not works
//------------------------
// 2) method
pFilterMenu->EnableMenuItem(ID_BT_AL_RISED, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);
//not works

[/code]

but not not works both methods,
why?
Or
How to do it correctly?

Vitali Halershtein7-Aug-03 0:21

7-Aug-03 0:21

Hi,

Use code similar this to enable/dissable menu item:

pPopup->EnableMenuItem(ID_..., MF_GRAYED);

and similar this to delete menu item (by command):

pPopup->DeleteMenu( ID_..., MF_BYCOMMAND );

Hope it help

Vitali

Ryan Binns7-Aug-03 1:10

7-Aug-03 1:10

I assume you're using the MFC MDI or SDI models. Insert an ON_UPDATE_COMMAND_UI() handler for your menu item, and call

pCmdUI->Enable(FALSE)

to disable the menu item. Passing TRUE will enable the menu item.

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

vgrigor7-Aug-03 1:19

7-Aug-03 1:19

I especially ask for manual disabling-
i.e. not responding to ON_UPDATE_COMMAND_UI() handler.

I dod analogous thing:

<br />
		CMenu* pMenu = this->GetMenu();<br />
		<br />
		CMenu* pFilterMenu =pMenu->GetSubMenu(1);// Filters<br />
<br />
    CCmdUI state;<br />
    state.m_pMenu = pFilterMenu;<br />
    state.m_nIndex = 1;/* 1 to nItems */<br />
	state.m_nIndexMax = 3;/* 1 to nItems */<br />
	state.m_bEnableChanged = true;<br />
        <br />
	state.m_nID = pFilterMenu->GetMenuItemID(state.m_nIndex);        // now route to message maps<br />
<br />
	state.m_pSubMenu = pFilterMenu->GetSubMenu(state.m_nIndex );<br />
<br />
	state.Enable(FALSE);<br />
<br />
	state.SetCheck(1);

but state.Enable(FALSE); - not works
even state.SetCheck(1); - works fine

Ryan Binns7-Aug-03 1:24

7-Aug-03 1:24

You can't manually disable a menu item because MFC overrides your updating. The only way to do it is with an ON_UPDATE_COMMAND_UI() handler. SetCheck() works because MFC either enables/disables the menu item. It doesn't change its check state unless you've got a toolbar button with the same ID which is a checkbox. Enable() will not work unless you use an ON_UPDATE_COMMAND_UI() handler.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

vgrigor7-Aug-03 1:31

7-Aug-03 1:31

Really may be,

but can I prohibit routing check for some menu Item?

CCmdUI::m_bContinueRouting - what does ?

It is also low probably that microsoft not proposed some or two methods
of hanling any user item...

_________
int CAlarmWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
is good place for modifing it's menu ?

Ryan Binns7-Aug-03 1:43

7-Aug-03 1:43

vgrigor wrote:
but can I prohibit routing check for some menu Item?

No. A handler is always called for each control identifier.

vgrigor wrote:
CCmdUI::m_bContinueRouting - what does ?

Allows multiple ON_UPDATE_COMMAND_UI() handlers to be called for a single control identifier. It is not used for preventing handlers being called.

vgrigor wrote:
It is also low probably that microsoft not proposed some or two methods of hanling any user item...

It might be a low probabilty, but they have Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

vgrigor7-Aug-03 1:50

7-Aug-03 1:50

Allows multiple ON_UPDATE_COMMAND_UI() handlers to be called for a single control identifier. It is not used for preventing handlers being called
- probably.

But I can not understand your sure that
method and keywords:
pFilterMenu->EnableMenuItem(ID_BT_AL_RISED, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);

is created to not work ??

Ryan Binns7-Aug-03 2:03

7-Aug-03 2:03

vgrigor wrote:
pFilterMenu->EnableMenuItem(ID_BT_AL_RISED, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);

is created to not work ??

It works for popup menus, but not for the menus attached to windows. It would work for menus attached to windows if you overrode WM_INITMENU and WM_INITMENUPOPUP and prevented the default processing and overrode OnIdle() in your application class and prevented the default processing. I wouldn't recommend doing this though, because it may break other parts of the program.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

vgrigor7-Aug-03 2:12

7-Aug-03 2:12

I tried at:
void CAlarmWnd::OnUpdateFrameMenu(HMENU hMenuAlt)
I will try as

void CAlarmWnd::OnInitMenu(CMenu* pMenu)
{
CFrameWnd::OnInitMenu(pMenu);

GetMenu()->GetSubMenu(1)
->EnableMenuItem(ID_BT_AL_RISED, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);

// TODO: Add your message handler code here
}
_____________________

and -not works.

Surely - such a method must be presented - for any kind of menu
(or any pixel) - so is design of MFC.

vgrigor7-Aug-03 3:31

7-Aug-03 3:31

works if to change to BY_POSITION action

GetMenu()->GetSubMenu(1)
->EnableMenuItem(postion, POSITION | MF_DISABLED | MF_GRAYED);

message id

ranjjj7-Aug-03 0:09

ranjjj

7-Aug-03 0:09

what is a message identifier?

ranjani

Re: message id

Vitali Halershtein7-Aug-03 0:14

Selecting multiple files in openFIleDialog

7-Aug-03 0:14

Hi,

MSDN say Smile | :)

==
message identifier
A unique value that identifies a message. System-defined messages use named constants, such as WM_PAINT, as message identifiers. Windows CE reserves message-identifier values in the range 0x0400 through 0x7FFF for application-defined messages.
==

Vitali

Re: message id

dharani7-Aug-03 0:24

dharani

7-Aug-03 0:24

hello ranjani
In modular programming like C++ and VC++ the control o fprogram passes from one area to another based on certain conditions . usually u do it with goto function in C but here in OOPS the control transfers from one line to another by message ids . ie when the user clicks on a menu a message like WM_COMMAND(menuitem , handler) -- here the first param in the WM_COMMAND is the menu item which the user clicked and the second item is the function name which will be fired once the message is fired . So U write whatever u want to do in the menu item here inside the handler that way the control of program gets transferred to the handler function . also other type of messages are also there like
system messages like WM_CLOSE , ON_FILE_OPEN like that but the handlers r already written for them . another type is POST_THREAD_MESSAGE ( MESSAGE) here the message can be posted by any object of a Class CWinThread and the handler function can be written for this mesasge also as mentioned above . hope u will find more info from msdn ( clumsy huh??) dharanibabus@hotmail.com

BoudewijnEctor6-Aug-03 23:57

BoudewijnEctor

6-Aug-03 23:57

Hi there,

I need to select multiple files in an openfiledialog in MFC, but I use this:

CFileDialog *cfd=new CFileDialog, true, ...., NULL, OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT, .... , NULL)<br />
<br />
CString x;<br />
cfd->DoModal();<br />
x=cfd->GetPathName();<br />

How can I convert this code to get more then one file???

Vitali Halershtein7-Aug-03 0:17

7-Aug-03 0:17

Hi student Smile | :)

To allow the user to select multiple files, set the OFN_ALLOWMULTISELECT flag before calling DoModal. You need to supply your own filename buffer to accommodate the returned list of multiple filenames. Do this by replacing m_ofn.lpstrFile with a pointer to a buffer you have allocated, after constructing the CFileDialog, but before calling DoModal. Additionally, you must set m_ofn.nMaxFile with the number of characters in the buffer pointed to by m_ofn.lpstrFile.

Vitali

BoudewijnEctor7-Aug-03 0:21

BoudewijnEctor

7-Aug-03 0:21

Talik wrote:
Do this by replacing m_ofn.lpstrFile with a pointer to a buffer you have allocated, after constructing the CFileDialog, but before calling DoModal. Additionally, you must set m_ofn.nMaxFile with the number of characters in the buffer pointed to by m_ofn.lpstrFile.

I don't understand this part (I've read it to in the MSDN); that's why I put it on CP. Can you give me some code, jsut for initializing the buffer, and filling it with those files?

Vitali Halershtein7-Aug-03 0:41

7-Aug-03 0:41

Dear BoudewijnEctor,

Look at the following link with full src code and sample:

http://www.codeproject.com/dialog/PJA_MultiSelect.asp

Vitali

clickety

PJ Arends7-Aug-03 10:41

PJ Arends

7-Aug-03 10:41

http://www.codeproject.com/dialog/PJA_MultiSelect.asp[^] Big Grin | :-D

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

How to Draw text in CEditView?

David Crow7-Aug-03 4:01

David Crow

7-Aug-03 4:01

Try these two previous discussions:

http://www.codeproject.com/script/comments/forums.asp?msg=574273&forumid=1647&mode=all&userid=52727#xx573787xx

http://www.codeproject.com/script/comments/forums.asp?msg=574178&forumid=1647&mode=all&userid=52727#xx573924xx

Habbit6-Aug-03 23:19

Habbit

6-Aug-03 23:19

Hi,I am a beginner in MFC of VisualC++.now i have a problem to be solved.

Somebody can help me?

I want to draw some text in CEditView via DrawText function,but it display nothing on CEditView.

some code below:

void CTPlatformView::OnDraw(CDC* pDC)
{
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here

CRect rect;
GetClientRect(&rect);
pDC->DrawText("hello",&rect,DT_LEFT);

}

Thanks!!

Re: How to Draw text in CEditView?

Vitali Halershtein6-Aug-03 23:27