Re: why OnKeyDown & OnKeyUp different when they meet "Enter"? - C / C++ / MFC Discussion Boards

F1 Override

si_693-Jun-07 23:29

si_69

3-Jun-07 23:29

Hi

Can anyone tell me how to override the F1 key, or any Function Keys from within a SDI application

thanks

simon

Re: F1 Override

_AnsHUMAN_ 3-Jun-07 23:34

_AnsHUMAN_

3-Jun-07 23:34

Handle WM_KEYDOWN event and check if the user presses the F1 key
if(nChar==VK_F1)
// Do something
else
// Do something else

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

_AnShUmAn_

Re: F1 Override

si_693-Jun-07 23:49

si_69

3-Jun-07 23:49

thanks, but the code you suggested works with all keys apart from F1

any ideas ?

Re: F1 Override

si_693-Jun-07 23:56

si_69

3-Jun-07 23:56

si_69 wrote:
thanks, but the code you suggested works with all keys apart from F1

any ideas ?

ignore this, i now have it working

thanks

Re: F1 Override [modified]

CPallini4-Jun-07 0:00

CPallini

4-Jun-07 0:00

You ~~have to~~ can override the CWnd::PreTraslateMessage method, see
http://msdn2.microsoft.com/en-us/library/2dffbw6e(VS.71).aspx#_core_handling_special_keys_in_your_control[^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: F1 Override

Rajkumar R3-Jun-07 23:59

Rajkumar R

3-Jun-07 23:59

Try CWnd::OnHelpInfo()

why OnKeyDown & OnKeyUp different when they meet "Enter"?

Peter, Chan3-Jun-07 23:16

Peter, Chan

3-Jun-07 23:16

I was writing a control "CColorEdit" which is derived from CEdit. I have override its OnKeyUp() and OnKeyDown. When I pressed the key "Enter", the OnKeyDown was invoked, but OnKeyUp wasn't invoked. I feel very confused. Does anyone have ever occured this kind of think.
Waiting for answer.

Best Regards.

Re: why OnKeyDown & OnKeyUp different when they meet "Enter"?

Habeeballah Hasnoddin3-Jun-07 23:54

Habeeballah Hasnoddin

3-Jun-07 23:54

For sure you have put the messagebox code in OnKeyDown. Since the messagebox pops up in OnKeyDown, the focus is gained by the messagebox, so the OnKeyUp will not be handled on the edit box. I tested myself without the messagebox, and for me both keydown and keyup are working fine on a derived class of CEdit.

Habeeballah Hasnoddin Rose | [Rose]

Re: why OnKeyDown & OnKeyUp different when they meet "Enter"?

Peter, Chan4-Jun-07 0:11

Peter, Chan

4-Jun-07 0:11

I think my code is OK. But it still doesn't work.

void CTestEdit::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
// TODO: Add your message handler code here and/or call default
if ( nChar == 13 )
{
//MessageBox("Down");
SetWindowText( "Bye Bye Bye" );
}

CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
}

Re: why OnKeyDown & OnKeyUp different when they meet "Enter"?

Habeeballah Hasnoddin4-Jun-07 1:08

Habeeballah Hasnoddin

4-Jun-07 1:08

I got the point.

==> You must have "Multiline" and "WantReturn" properties set on this edit box.

As I observed while testing, the following is true.

--> If you set just the "Multiline" then only keydown gets fired and not the keyup.
--> If you set just the wantreturn and not the Multiline then only keyup gets fired and not keydown.

thats it.

Habeeballah Hasnoddin

Re: why OnKeyDown & OnKeyUp different when they meet "Enter"?

Peter, Chan4-Jun-07 15:37

Peter, Chan

4-Jun-07 15:37

Thank you very much.
You are so kind. Big Grin | :-D

How to load bitmap in vb using vc++ dll

jannathali3-Jun-07 23:02

jannathali

3-Jun-07 23:02

hai,
i am new to dll. any one please explain how to load bitmap in vb using vc++ dll

Re: How to load bitmap in vb using vc++ dll

CPallini3-Jun-07 23:37

CPallini

3-Jun-07 23:37

To load a bitmap from a file you can use LoadImage function (http://msdn2.microsoft.com/en-us/library/ms648045.aspx[^])

for instance:

HANDLE hBitmap = LoadImage(NULL, filepath, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);

where filepath is a string containing the path of your bitmap file.

Note, you have to call DeleteObject(hBitmap) to perform cleanup when you've finished with the image.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Dialog Bar

vivekphlp3-Jun-07 22:51

vivekphlp

3-Jun-07 22:51

how can i create a dialog bar in my application..
I inserted the resource Insert->dialog-dialogbar..
When i try to create a class for my dialogbar, using class wizard.. the Base class CDialogBar is not displayed . . .
what can i do . .

Proud To Be an Indian

Re: Dialog Bar

Peter, Chan3-Jun-07 23:21

Peter, Chan

3-Jun-07 23:21

Do you mean toolbar?
If it's toolbar, you can do accroding to the following step.
1)create a toolbar resource "Insert->toolbar"
2)add a member
CToolBar m_wndToolBar;
3)add the following code in your OnInitDialog()
if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
!m_wndToolBar.LoadToolBar(IDR_TOOLBAR1))
{
TRACE0("Failed to create toolbar\n");
return -1; // fail to create
}
m_wndToolBar.ShowWindow(SW_SHOW);
RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST, 0);

I hope it will works.;P

Re: Dialog Bar

vivekphlp3-Jun-07 23:56

vivekphlp

3-Jun-07 23:56

hey no its a DIALOG BAR . ..

Proud To Be an Indian

Re: Dialog Bar

Rajkumar R3-Jun-07 23:46

Rajkumar R

3-Jun-07 23:46

Hi,
I usually derive it from CDialog and rename the CDialog to CDialogBar
and
if you need you can simplify the create() function with

 BOOL CYourDlgBar::Create(CWnd* pParentWnd, UINT nStyle)<br />
{<br />
    return CDialogBar::Create(pParentWnd, IDD, nStyle, IDD);<br />
}<br />

And on your frame window create, dock your dialog bar

 m_yourDlgBarObj.Create(this, //frame instance<br />
		WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_CHILD |WS_VISIBLE | //style<br />
		CBRS_BOTTOM|CBRS_TOOLTIPS);<br />
<br />
m_yourDlgBarObj.EnableDocking(CBRS_ALIGN_BOTTOM | CBRS_ALIGN_TOP);<br />
DockControlBar(&m_yourDlgBarObj);<br />

Re: Dialog Bar

vivekphlp3-Jun-07 23:58

vivekphlp

3-Jun-07 23:58

OK its working now ... i followed what u said . . .
I had a button in the dialog bar . . but its disabled why . . .

Proud To Be an Indian

Re: Dialog Bar

Rajkumar R4-Jun-07 0:04

Rajkumar R

4-Jun-07 0:04

It is the property of MFC,
MFC disables controls if the handlers is not available
override OnUpdateCmdUI() this will enable all.
But MFC wants handlers for each control

Best Regards
Raj

Re: Dialog Bar [modified]

vivekphlp4-Jun-07 0:11

vivekphlp

4-Jun-07 0:11

Sorry Raj ... can u plz be more specific...
How to add OnUpdateCmdUI()

There was a button & text box. The text box is enabled...
I added some functionality to the buttn just to display hello,..

Proud To Be an Indian

Re: Dialog Bar

Rajkumar R4-Jun-07 0:50

Rajkumar R

4-Jun-07 0:50

Now you have your CYourDlgBarClass,
using class wizard add the override OnUpdateCmdUI(), that's all, this will add

virtual void OnUpdateCmdUI(<br />
       IN CFrameWnd* pTarget, <br />
       IN BOOL bDisableIfNoHandler<br />
       );

in your declaration
and

<br />
void <br />
CYourDlgBarClass::OnUpdateCmdUI(<br />
	IN CFrameWnd* /*pTarget*/, <br />
	IN BOOL /*bDisableIfNoHandler*/<br />
	)<br />
{<br />
	// TODO: Add your specialized code here and/or call the base class<br />
}<br />

in your implementation
if class wizard found to be not helpful, simply code manually,

this is enough to enable.

for enabling individual controls ,
use
ON_UPDATE_COMMAND_UI(id /* control id*/, memberFxn ) in the message map.

Best Regards

Re: Dialog Bar

vivekphlp4-Jun-07 1:32

vivekphlp

4-Jun-07 1:32

Thanks its working nicely . . . can u plz explain what is happening behind..
1) the UpdateCmdUI was not in Class wizard
2)no code was given inside
CYourDlgBarClass::OnUpdateCmdUI(IN CFrameWnd,IN BOOL)
{
}
then how it is enabled???

3)What is the IN type

oops a small probs its not coming in order.. i added it after the main tool bar buts its comming before the standard tool bar..

Proud To Be an Indian

Re: Dialog Bar

Rajkumar R4-Jun-07 21:38

Rajkumar R

4-Jun-07 21:38

1) No it can be found in class wizard, I donot have issue in VS2005,
2) The default implementation will disable it, we overrided it.
3) IN is simply a empty macro, used just for code readability,
(the parameter is input that is caller donot expect change, there is also OUT macro).

You need to use DockControlBar() with all parameters set to customise the order of docking.

Best Regards
Raj

get rid of icon on title bar of dialog

nathan73-Jun-07 22:07

nathan7

3-Jun-07 22:07

hi, i noticed if i set border of a dialog to resizing, then there is an icon on the left hand side of the title bar, how can i remove it?

nathan

Re: get rid of icon on title bar of dialog

Hamid_RT3-Jun-07 22:11

Hamid_RT

3-Jun-07 22:11

Remove these codes of your program

SetIcon(m_hIcon, TRUE);			// Set big icon
SetIcon(m_hIcon, FALSE);		// Set small icon

WhiteSky

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