Modifications on TListView

Modifications on TListView

Postby AntoninoP » Mon Jun 15, 2015 10:52 am

Hello,
In my version of FW I made some modification that I think can be useful to others too.
1) In METHOD Paint() CLASS TListView I substituted:
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FillRect( ::hDC, GetClientRect( ::hWnd ), ::oBrush:hBrush )

with
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::PaintBack( ::hDC )

to allow transparent ListView.
In this case You must call:
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::oView:SendMsg(/*LVM_SETEXTENDEDLISTVIEWSTYLE*/0x1000+54, /*LVS_EX_TRANSPARENTBKGND*/0x00400000,/*LVS_EX_TRANSPARENTBKGND*/0x00400000)

or create it with LVS_EX_TRANSPARENTBKGND extended style. (It is a good idea)
2) Added method SetView:
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METHOD SetView(iView) INLINE LVSetView(::hWnd, iView )

with this code in c:
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HB_FUNC( LVSETVIEW )
{
     #ifndef _WIN64
      HWND hWnd = ( HWND ) hb_parnl( 1 );
   #else  
      HWND hWnd = ( HWND ) hb_parnll( 1 );
   #endif  
   DWORD nView = ( DWORD ) hb_parnl( 2 );
   hb_retnl( ListView_SetView(hWnd, nView));
}

where view can be:
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#define LV_VIEW_ICON            0x0000
#define LV_VIEW_DETAILS         0x0001
#define LV_VIEW_SMALLICON       0x0002
#define LV_VIEW_LIST            0x0003
#define LV_VIEW_TILE            0x0004

3) Added method GetSelection
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METHOD GetSelection() INLINE LVGetSelection(::hWnd, iView )

with this code in c:
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HB_FUNC( LVGETSELECTION )
{
     #ifndef _WIN64
      HWND hWnd = ( HWND ) hb_parnl( 1 );
   #else  
      HWND hWnd = ( HWND ) hb_parnll( 1 );
   #endif  
   UINT nItem = ListView_GetItemCount(hWnd);
   UINT nSel = ListView_GetSelectedCount(hWnd);
   UINT i,j=0;
   char bBuffer[ 250 ];
   for(i=0;i<nItem;i++)
   {
      bBuffer[i] = ( ListView_GetItemState(hWnd, (int)i, LVIS_SELECTED) == LVIS_SELECTED)? '1' : '0';
   }
   hb_reta( nSel );
   for(i=0;i<nItem;i++)
   {
      if( bBuffer[i] == '1')
      {
         hb_storvni( i+1, -1, j+1 );
         j++;
      }
   }
}

(If I call ListView_GetItemState between hb_reta and hb_storvni it does not work... I don't know why, maybe someone can light me)
4) Set the group collapsible, it should be an option on the method InsertGroup.
I changed LVINSERTGROUP with this code:
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   grp.mask = LVGF_HEADER | LVGF_GROUPID | LVGF_FOOTER |LVGF_STATE;
   grp.state = LVGS_COLLAPSIBLE;
   grp.stateMask = LVGS_COLLAPSIBLE;
 

5) added this method to change text color:
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HB_FUNC( LVSETTEXTCOLOR  )
{
     #ifndef _WIN64
      HWND hWnd = ( HWND ) hb_parnl( 1 );
   #else  
      HWND hWnd = ( HWND ) hb_parnll( 1 );
   #endif  
   COLORREF clrText = ( COLORREF ) hb_parnl( 2 );
   hb_retnl( ListView_SetTextColor(hWnd, clrText));
}

Here my ListView:
Image
PS: note the Explorer Theme :)
AntoninoP
 
Posts: 168
Joined: Tue Feb 10, 2015 9:48 am
Location: Albenga, Italy

Re: Modifications on TListView

Postby Antonio Linares » Mon Jun 15, 2015 8:47 pm

Antonino,

Many thanks, it looks great :-)

We will include it in FWH after FWH 15.05 build 4
regards, saludos

Antonio Linares
www.fivetechsoft.com
User avatar
Antonio Linares
Site Admin
 
Posts: 35258
Joined: Thu Oct 06, 2005 5:47 pm
Location: Spain


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