Disable mouse wheel in FWH 8.10

[cdmmaui]

How can I disable mouse wheel in FWH 8.10?

Thank You,

[James Bott]

Darrell,

I don't think you can. Why would you want to?

Regards,
James

[Antonio Linares]

Darrell,

In the class where you want to disable it, include this method:

METHOD MouseWheel( nKey, nDelta, nXPos, nYPos ) VIRTUAL

[James Bott]

Antonio,

That is a nice simple solution!

If I remember correctly there is a way in xHarbour to override a class method so you don't have to modify the original source. Can you show us how to do it that way?

Regards,
James

[cdmmaui]

Thank You Antonio and James,

Antonio, can you provide sample source per James' request?

[Antonio Linares]

I am not very much used to this syntax, but I guess this may work:

Code: Select all  Expand view

#include "FiveWin.ch"
...

OVERRIDE METHOD MouseWheel IN CLASS TXBrowse WITH MyMouseWheel

...

function MyMouseWheel( nKey, nDelta, nXPos, nYPos )

   // local Self := HB_QSelf()

return nil


[Rossine]

Hello Antonio,


Maybe you could create a "flag" to control this, ie one more appeal to xbrowse

SAMPLE:

Code: Select all  Expand view

//----------------------------------------------------------------------------//

STATIC FUNCTION BasicCell( oWnd )

   local oChild, oBrw

   DEFINE WINDOW oChild TITLE "Basic Cell selector browse" MDICHILD OF oWnd

   @ 0,0 XBROWSE oBrw OF oWnd ALIAS Alias()

   oBrw:CreateFromCode()

   oBrw:cToolTip = "This is a test"

   oBrw:lMouseWheel := .F.      // NEW

   oChild:oClient := oBrw

   ACTIVATE WINDOW oChild ON INIT oBrw:SetFocus()

RETURN NIL



Changes is XBROWSE.PRG

Code: Select all  Expand view

//----------------------------------------------------------------------------//


METHOD New( oWnd ) CLASS TXBrowse

...
::lMouseWheel := .T.
...

return Self

//----------------------------------------------------------------------------//

METHOD MouseWheel( nKeys, nDelta, nXPos, nYPos ) CLASS TXBrowse

   local aPoint := { nYPos, nXPos }

   if ! ::lMouseWheel
      return NIL
   endif

   ScreenToClient( ::hWnd, aPoint )

   if IsOverWnd( ::hWnd, aPoint[ 1 ], aPoint[ 2 ] ) .and. ;
...
return NIL


[James Bott]

I still wonder why you want to disable the scroll wheel?

As a user, I would not be happy about this--I use it extensively.

Regards,
James

[cdmmaui]

Hi James,

I am having a problem in which I call a modal dialog box from listbox window and the user is using the mouse wheel within the dialog to change the focus of the listbox record. I need to disable the mouse wheel only for this process.

[James Bott]

Darrell,

>I am having a problem in which I call a modal dialog box from listbox window and the user is using the mouse wheel within the dialog to change the focus of the listbox record. I need to disable the mouse wheel only for this process.

Hmm, you mean that the mouse wheel is still working when you have a modal dialog box open? By definition, you cannot have focus on anything else in the same app while a modal dialog box is open. At least this is the way it is supposed to be.

If the mouse wheel is active, then are the arrow keys active also?

Further, Antonio's solution is not going to work for you since you want to be able to turn on and off the mouse wheel depending on a condition.

I think that there is either a flaw in your design, or a bug in FW if this is what is happening.

Maybe you meant a "non-modal" dialog?

Regards,
James

[Antonio Linares]

Darrell,

If you just want to temporarly disable the user input on the browse, then you can do:

oBrowse:Disable()

and later on, when you are done:

oBrowse:Enable()