C / C++ / MFC

Re: i can disable menu item but cannot gray it!!!!!!!!

4-Aug-04 23:06

Hi,

I have a dialog based app, want to disable and gray a sub menu item and I cannot gray it. I tried to find a solution to this problem but could not. Neither of the following work. Mad | :mad:

What happens is I see Item 3 in black, press it, and nothing happens. I could have done it by modifying the code that is called when Item 3 is pressed. Why would I bother with OnUpdate? What's the use of it? I got no idea! Confused | :confused:

I will be very happy if someone can help me.

Thanks...

// The menu looks like:<br />
// File  Settings<br />
// Item1 Item2<br />
//       Item3

void CMyDlg::OnUpdateSettingsItem3(CCmdUI* pCmdUI) 
{
 if (pCmdUI->m_nID==ID_SETTINGS_ITEM3)
 {
    UINT fGray = Item3Enable ? 0 : MF_GRAYED|MF_DISABLED;
    if(pCmdUI->m_pMenu!=NULL)
       pCmdUI->m_pMenu->EnableMenuItem(pCmdUI->m_nIndex /*ID_SETTINGS_ITEM3*/, MF_BYPOSITION|fGray);	
 }
 pCmdUI->Enable(Item3Enable);
}

void CMyDlg::OnUpdateSettingsItem3(CCmdUI* pCmdUI) 
{
 if (pCmdUI->m_nID==ID_SETTINGS_ITEM3)
 {
    UINT fGray = Item3Enable ? 0 : MF_GRAYED|MF_DISABLED;

    CMenu *hMenu;
    hMenu = AfxGetMainWnd()->GetMenu();		
    CMenu *sub;
    sub = hMenu->GetSubMenu(1);
    sub->EnableMenuItem(ID_SETTINGS_ITEM3, MF_BYPOSITION|fGray); }
 }
 pCmdUI->Enable(Item3Enable);
}

Brian Delahunty4-Aug-04 23:15

Brian Delahunty

4-Aug-04 23:15

what is Item3Enable??? I presume it's a bool that you've set somewhere else in the program.... and you're passing that into pCmdUI->Enable() at the end of each handler but you are not changing the true/false value of Item3Enable so you seem to be enabling the menu item at the end of each handler.

Regards,
Brian Dela Smile | :)

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Re: i can disable menu item but cannot gray it!!!!!!!!

caykahve4-Aug-04 23:27

Re: i can disable menu item but cannot gray it!!!!!!!!

4-Aug-04 23:27

Yes, I set the bool variable Item3Enable to true somewhere else when I want to have ID_SETTINGS_ITEM3 enabled, and to false when I want to have ID_SETTINGS_ITEM3 disabled.

Jaime Stuardo5-Aug-04 3:39

Jaime Stuardo

5-Aug-04 3:39

Just do:

pCmdUI->Enable(FALSE);

when pCmdUI->m_nID is ID_SETTINGS_ITEM3

that is, simply you can do:

pCmdUI->Enable(pCmdUI->m_nID != ID_SETTINGS_ITEM3);

Jaime

Re: i can disable menu item but cannot gray it!!!!!!!!

caykahve5-Aug-04 4:35

Re: i can disable menu item but cannot gray it!!!!!!!!

5-Aug-04 4:35

I have already set it to false, item 3 becomes disabled, but not gray!! besides I do not want to have it always disabled, therefore I have put the variable Item3Enable, which I set to true or false in another function outside.

I must be able to point to item 3 somehow and disable it but pCmdUI->m_pMenu is always NULL. I cannot manage to disable item 3 with GetMenu() and GetSubMenu() either, although I know it is possible to check and uncheck a menu item on a COMMAND message mapped to it using GetMenu() and GetsubMenu().

Does not anyone know why this doesn't work?

Jaime Stuardo5-Aug-04 5:03

Jaime Stuardo

5-Aug-04 5:03

Have you tried to put pCmdUI->Enable(FALSE) as the only instruction in the update handler? If that way the menu option is grayed, the problem is the condition you have.

By the way, if that update handler is called only for item 3, you don't need that verification.

Finally, I tell you that I use my own application to place pCmdUI->Enable(FALSE) for a specific menu item and it worked (disabled and grayed) so the problem may be in your condition.

Jaime

Re: i can disable menu item but cannot gray it!!!!!!!!

caykahve5-Aug-04 5:27

Re: i can disable menu item but cannot gray it!!!!!!!!

5-Aug-04 5:27

Yes, it was only one line pCmdUI->Enable(true/false) before I encluntered the problem of non-grayed disabling. I put the other code to be able to gray it. actually I found it in some documents on internet, but none of the examples I saw directly match the situation I have.

You're right about the verification being unncessary, i did that to be sure.

Jaime Stuardo5-Aug-04 6:06

Jaime Stuardo

5-Aug-04 6:06

I can guess that you have in other part of your program a code to "ungray" the item. Check that.

Other fact to check. Are other menu items grayed that you see grayed? maybe is only a display problem.

Jaime

solution!

caykahve6-Aug-04 0:25

How to hide dialog box in MFC

6-Aug-04 0:25

I solved the problem and I'm very happy for that!! Big Grin | :-D

ok.. forget the function mapped to UPDATE_COMMAND_UI - delete it! Somewhere outside do this to switch between enabled and disabled menu items - nothing else

//enable-disable switch<br />
// Item3Enable is the bool value to decide if it will be enabled or disabled<br />
Item3Enable = !Item3Enable;<br />
<br />
UINT fGray = Item3Enable ? 0 : MF_GRAYED|MF_DISABLED;<br />
CMenu *hMenu;    <br />
hMenu = GetMenu();		    <br />
CMenu *sub;    <br />
sub = hMenu->GetSubMenu(1);    <br />
sub->EnableMenuItem(ID_SETTINGS_ITEM3, MF_BYCOMMAND|fGray);

Rajesh_K_Sharma4-Aug-04 22:55

Rajesh_K_Sharma

4-Aug-04 22:55

Hi all,
I would like to know that "how to hide dialog box" on pressing the command button.

rajesh

Re: How to hide dialog box in MFC

Brian Delahunty4-Aug-04 23:07

Brian Delahunty

4-Aug-04 23:07

In the button click handler add something like m_MyDialog.ShowWindow(SW_HIDE); where m_MyDialog is your dialog object.

If the button is on the dialog you are trying to hide then this would do the trick: this->ShowWindow(SW_HIDE);

Regards,
Brian Dela Smile | :)

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Re: How to hide dialog box in MFC

Rajesh_K_Sharma5-Aug-04 0:47

Rajesh_K_Sharma

5-Aug-04 0:47

Actually this is not working in my program.
I would like to explain my question.
I insert three dialog box(d1,d2 and d3) and also make their
classes for each dialog box(CD1,CD2 and CD3), derived from CDialog.
d1 contains two botton "Back and Next".On Clicking on the "Next" button, it calls d2(second dialog box).d2 also contains two button "Continue and Cancel".Again I press the "Continue" button, it calls d3(third dialog box).
Now I want to do that when I click on "Continue" button,it calls d3 and dismiss(hide) the both dialog box(d1 and d2)simultaneously.
I wrote code something like that:

void CD1::OnNext()
{
CD2 dlg2;
dlg2.DoModal();
}
............
..............
void CD2::OnContinue()
{
CD3 dlg3;
dlg3.DoModal();
}
Please help me
How to write code on the "Coninue" button so that d1 and d2 will be hide together?.

rajesh

Re: How to hide dialog box in MFC

David Crow5-Aug-04 2:39

5-Aug-04 2:39

void CD1::OnNext()
{
    CD2 dlg2(this);
    ShowWindow(SW_HIDE);
    dlg2.DoModal();
}
 
void CD2::OnContinue()
{
    CD3 dlg3(this);
    ShowWindow(SW_HIDE);
    dlg3.DoModal();
}

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

DSW file format?

Member 12782624-Aug-04 22:45

Member 1278262

4-Aug-04 22:45

Can anyone suggest any resource that describes the contents of the dev studio workspace file?

Re: DSW file format?

David Crow5-Aug-04 2:42

How to write Custom GINA.dll

5-Aug-04 2:42

Have you tried opening the file in Notepad? It's not a binary file so you should be able to go through it.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: DSW file format?

Member 12782625-Aug-04 3:08

Member 1278262

5-Aug-04 3:08

I got that far.

What I was wondering was...

Is there a way of setting variables with a workspace scope, so that all the individual projects can see them?

anshums4-Aug-04 22:27

anshums

4-Aug-04 22:27

someone plz suggest how to write a custom GINA.dll for Windows XP for Voice Based Login System

thanks in advance

Anshuman

Hai

Asha Rams4-Aug-04 22:18

Asha Rams

4-Aug-04 22:18

how to bind a edit control in a ADO to a combo box control ?
which class in MFC will help,

David Crow5-Aug-04 2:44

5-Aug-04 2:44

What do you mean by binding an edit control to a combobox control?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Anonymous9-Aug-04 0:17

Anonymous

9-Aug-04 0:17

it means a current Record set called as a ADO Data bound dialog , where i have all static and edit boxs as default ,i need to place a new combobox to call the data of a field from second record set of database

David Crow9-Aug-04 2:18

9-Aug-04 2:18

So are you wanting to populate a combobox with the results of a recordset query?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Asha Rams11-Aug-04 22:02

Asha Rams

11-Aug-04 22:02

Yes,i want to place a combobox on a ADO data dialog with a result of a recordset query to get only a selected field from the table in this combobox as a dropdown, Please help me this

David Crow12-Aug-04 2:52