在ListView中添加一个进度条

看CxGrid资料的时候,看见了一个为兄弟的文章,我就转一下了.

---

//需要Use CommCtrl
Function GetSubItemRect( handle, ItemsIndex, SubIndex: Integer ): TRect ;
Begin
ListView_GetSubItemRect( Handle, ItemsIndex, SubIndex, 0, @Result ) ;
End ;
Procedure TFormMain.lvw_listCustomDrawSubItem( Sender: TCustomListView ;
Item: TListItem ;SubItem: Integer ;State: TCustomDrawState ;
Var DefaultDraw: Boolean ) ;
Var
l_Rect: TRect ;
l_intPercent: Integer ;
Begin
If SubItem = 3 Then
Begin
If Item.Data = Nil Then
Exit ;
l_intPercent := PListData( Item.Data ).Percent ;
//获取ListView子项的Rect
l_Rect := GetSubItemRect( Item.Handle, Item.Index, SubItem ) ;
//画一条外边框
InflateRect( l_Rect, -1, -1 ) ;
Sender.Canvas.Brush.Color := clBlack ;
Sender.Canvas.FrameRect( l_Rect ) ;
//先填充底色
InflateRect( l_Rect, -1, -1 ) ;
Sender.Canvas.Brush.Color := lvw_list.Color ;
Sender.Canvas.FillRect( l_Rect ) ;
//再根据进度画出完成区域
If l_intPercent = 100 Then
Sender.Canvas.Brush.Color := clGreen
Else
Sender.Canvas.Brush.Color := clPurple ;
l_Rect.Right := l_Rect.Left + Floor( ( l_Rect.Right - l_Rect.Left ) * l_intPercent / 100 ) ;
Sender.Canvas.FillRect( l_Rect ) ;
//恢复笔刷
Sender.Canvas.Brush.Color := lvw_list.Color ;
//关键的一句，屏蔽系统自绘过程
DefaultDraw := False ;
End ;
End ;
相关定义
Type
TListData = Record
FileName: String ;
Percent: Integer ;
End ;
PListData = ^TListData ;
  本文来自CSDN博客，转载请标明出处：http: //blog.csdn.net/kwbin/archive/2008/11/26/3381317.aspx
效果图: