bOr / nOr : how to "add" Constante under FiveWin

[Jimmy]

hi,

to set different Constante under Xbase++ i use

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  ::oLVCol:mask := nOr( LVCF_FMT,  LVCF_WIDTH , LVCF_TEXT , LVCF_SUBITEM )

i know i can "add" Constante this Way

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  ::oLVCol:mask := LVCF_FMT + LVCF_WIDTH + LVCF_TEXT + LVCF_SUBITEM

but i like to know how under FiveWin

p.s. can use use hbxpp Constribution under FivWin ?

[Antonio Linares]

Dear Jimmy,

FWH also provides a function nOr() you can use the same way. Also you can use Harbour's own function hb_bitOr()

> ::oLVCol:mask := LVCF_FMT + LVCF_WIDTH + LVCF_TEXT + LVCF_SUBITEM

You can't use it that way as OR is a different process from adding those values

> p.s. can use use hbxpp Constribution under FiveWin ?

I don't think so, but anyhow please try to link it and lets see what unresolved externals you get

[nageswaragunupudi]

For flags we better use OR not +

OR vs +

1 OR 2 = 3
1 + 2 = 3 // OK

1 OR 1 = 1
1 + 1 = 2 // NOT OK

3 OR 6 = 7 ( binary 011 OR 110 = 111 )
3 + 6 = 9 // NOT OK

Ways to use "OR"

( a | b | c ...) // clang
nOr( a, b, ... ) // FWH function
NUMOR( a, b, .. ) // CT function
HB_BITOR( a, b ) // xHarbour 2 params only
HB_BITOR( a, b, c, ... ) // Harbour

[Jimmy]

hi,

i wonder ...

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#define LVCF_FMT              0x01
#define LVCF_SUBITEM          0x08
#define LVCF_TEXT             0x04
#define LVCF_WIDTH            0x02

PROCEDURE TEST
LOCAL nTest1,nTest2

   nTest1 := nor(LVCF_FMT,LVCF_WIDTH,LVCF_TEXT,LVCF_SUBITEM)
   nTest2 := LVCF_FMT + LVCF_WIDTH + LVCF_TEXT + LVCF_SUBITEM

   msgInfo(STR(nTest1)+" vs. "+STR(nTest2),IF(nTest1==nTest2,"True","False"))

[Jimmy]

hi,

i want to "remove" Style

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   nStyle := nAndNot(::nStyle,LVS_ICON     )

and add new Style

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   nStyle := nOr(nStyle,nView)
   SetWindowLong(::hLv , GWL_STYLE , nStyle )

but i can´t find nAndNot() in c:\fwh\source\function\or.c
how to "remove" Style under FiveWin

[nageswaragunupudi]

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nStyle := nAnd( ::nStyle, nNot( LVS_ICON ) )

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nStyle := GetWindowLong( ::hWnd, GWL_STYLE )
SetWindowLong( ::hWnd, GWL_STYLE, nAnd( nStyle, nNot( nRemveStyle ) ) )
 

Another way:

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nExistingStyle := GetWindowLong( ::hWnd, GWL_STYLE )
if lAnd( nExistingStyle, nRemoveStyle )
   nNewStyle := nXor( nExistingStyle, nRemoveStyle )
   SetWindowLong( hWnd, GWL_STYLE, nNewStyle )
endif
 

Please see
METHOD GetSetGWLStyle( lExtended, nStyle, lOnOff ) CLASS TWindow

[nageswaragunupudi]

If you make a class as derived from TWindow class (or better TControl class)

We can use Parent method:

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oOurWnd:WinStyle( nNewStyle, lOnOff )
// .t. to add new style
// .f. to remove style, if already exists
 

This does everything that is needed.

[nageswaragunupudi]

Am I write in my understanding the you are developing a new class TGRID using ListView. For it to work with FWH Windows and dialogs, we have to derive the class from TControl.

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CLASS TGrid FROM TControl

TControl is derived from TWinndow.
So the new TGrid class already has all methods of TControl and TWindow.
You need not spend your time in writing code from scratch like using GetWindowLong(...) and SetWindowLong(..). All such things are already available in a very simple and userfriendly way.

A user of TGrid class can

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oGrid  := TGrid():New( oWnd, <other params,...> )
oGrid:WinStyle( nStyle, .t. to add or .f. to remove)
 

[Jimmy]

hi,

i´m still a Newbie under FiveWin and did not know that TControl have Method to change Style.

will it work with Listview as i have not found any Listview_Macro
i now use this HB_FUNC() for TGrid()

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HB_FUNC( LV_CHANGEEXTENDEDSTYLE )
{
   #ifndef _WIN64
      HWND hWnd = ( HWND ) hb_parnl( 1 );
   #else
      HWND hWnd = ( HWND ) hb_parnll( 1 );
   #endif
   DWORD Add     = (DWORD) hb_parnl  (2);
   DWORD Remove  = (DWORD) hb_parnl  (3);
   DWORD OldStyle, NewStyle, Style;

   OldStyle = ListView_GetExtendedListViewStyle (hWnd);
   NewStyle = (OldStyle | Add) & ( ~Remove );
   Style = ListView_SetExtendedListViewStyle ( hWnd, NewStyle );
   hb_retnl ((LONG) Style);
}