Savoir si une liste (Listbox ou ListView) est filtrée

Bonjour,

presque tout est dans le titre. Suite à cette FAQ je me suis aperçu qu'une liste ne se triait pas (nuances : plus avec Rio, pas avec Sidney) si elle était filtrée par utilisation de la recherche d'où ma question.

ci-dessous les sources (code et forme)

Code:

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unit UTestSortList;
 
interface
 
uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  Data.Bind.GenData, Data.Bind.EngExt, Fmx.Bind.DBEngExt, System.Rtti,
  System.Bindings.Outputs, Fmx.Bind.Editors, FMX.Objects, Data.Bind.Components,
  FMX.Edit, FMX.SearchBox, FMX.Controls.Presentation, FMX.StdCtrls, FMX.Layouts,
  FMX.ListBox, Data.Bind.ObjectScope;
 
type
  TForm1 = class(TForm)
    PrototypeBindSource1: TPrototypeBindSource;
    ListBox1: TListBox;
    btnSortbyName: TButton;
    btnSortByBonus: TButton;
    SearchBox1: TSearchBox;
    BindingsList1: TBindingsList;
    LinkListControlToField1: TLinkListControlToField;
    PathSortN: TPath;
    PathSortB: TPath;
    procedure btnSortbyNameClick(Sender: TObject);
    procedure btnSortByBonusClick(Sender: TObject);
  private
    { Déclarations privées }
  public
    { Déclarations publiques }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.fmx}
 
uses System.Math;
 
procedure TForm1.btnSortByBonusClick(Sender: TObject);
var Compare : TFMXObjectSortCompare;
begin
{TODO -oOwner -cGeneral : tester si la liste est filtrée}
 PathSortN.Visible:=False;
 btnSortByBonus.Tag:=IfThen(btnSortByBonus.Tag=0,1,0);
 PathSortB.RotationAngle:=180*btnSortByBonus.Tag;
 PathSortB.Visible:=True;
 ListBox1.Sorted:=False;
 Compare:=function(Item1, Item2: TFmxObject): Integer
  var n1,n2 : Single;
  begin
    n1:=StrToFloatDef(TListBoxItem(Item1).ItemData.Detail,0);
    n2:=StrToFloatDef(TListBoxItem(Item2).ItemData.Detail,0);
    if n1=n2 then Result:=0
    else begin
      if n2>n1 then Result := 1
               else Result := -1;
    end;
    if btnSortByBonus.Tag=1 then Result:=Result*-1;
  end;
 ListBox1.Sort(Compare);
 ListBox1.RealignContent;
end;
 
procedure TForm1.btnSortbyNameClick(Sender: TObject);
var Compare : TFMXObjectSortCompare;
begin
{TODO -oOwner -cGeneral : tester si la liste est filtrée}
// si filtrée exit;
 PathSortB.Visible:=False;
 btnSortByName.Tag:=IfThen(btnSortByName.Tag=0,1,0);
 PathSortN.RotationAngle:=180*btnSortByName.Tag;
 PathSortN.Visible:=True;
 ListBox1.Sorted:=False;
 Compare:=function(Item1, Item2: TFmxObject): Integer
  begin
    result:=CompareText(TListBoxItem(Item1).text,TListBoxItem(Item2).text);
    if btnSortByName.Tag=1 then Result:=Result*-1;
  end;
 ListBox1.Sort(Compare);
 ListBox1.RealignContent;
end;
 
end.

Code:

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object Form1: TForm1
  Left = 0
  Top = 0
  Caption = ' ListBox Sort and Search'
  ClientHeight = 433
  ClientWidth = 383
  FormFactor.Width = 320
  FormFactor.Height = 480
  FormFactor.Devices = [Desktop]
  DesignerMasterStyle = 0
  object ListBox1: TListBox
    Position.X = 8.000000000000000000
    Position.Y = 72.000000000000000000
    Size.Width = 321.000000000000000000
    Size.Height = 297.000000000000000000
    Size.PlatformDefault = False
    DisableFocusEffect = True
    ItemIndex = 0
    Items.Strings = (
      'Mary Harris'
      'James Garcia'
      'Paul Davis'
      'Adam Brown'
      'Susan Sanchez'
      'Steve Moore'
      'Donna Martin'
      'Mark Anderson'
      'Michelle Smith'
      'Christine Jones')
    DefaultItemStyles.ItemStyle = 'listboxitemrightdetail'
    DefaultItemStyles.GroupHeaderStyle = ''
    DefaultItemStyles.GroupFooterStyle = ''
    Viewport.Width = 317.000000000000000000
    Viewport.Height = 271.000000000000000000
    object SearchBox1: TSearchBox
      Touch.InteractiveGestures = [LongTap, DoubleTap]
      Align = Top
      Size.Width = 317.000000000000000000
      Size.Height = 22.000000000000000000
      Size.PlatformDefault = False
    end
  end
  object btnSortbyName: TButton
    Position.X = 8.000000000000000000
    Position.Y = 384.000000000000000000
    Size.Width = 97.000000000000000000
    Size.Height = 33.000000000000000000
    Size.PlatformDefault = False
    Text = 'Sort by Name'
    OnClick = btnSortbyNameClick
  end
  object btnSortByBonus: TButton
    Position.X = 208.000000000000000000
    Position.Y = 384.000000000000000000
    Size.Width = 97.000000000000000000
    Size.Height = 33.000000000000000000
    Size.PlatformDefault = False
    Text = 'Sort by Bonus'
    OnClick = btnSortByBonusClick
  end
  object PathSortN: TPath
    Data.Path = {
      04000000000000000000803F0000A841010000000000B8410000A84101000000
      0000404100000040030000000000803F0000A841}
    Fill.Color = claBlack
    HitTest = False
    Position.X = 108.000000000000000000
    Position.Y = 388.000000000000000000
    Size.Width = 25.000000000000000000
    Size.Height = 25.000000000000000000
    Size.PlatformDefault = False
    Stroke.Kind = None
    Visible = False
  end
  object PathSortB: TPath
    Data.Path = {
      04000000000000000000803F0000A841010000000000B8410000A84101000000
      0000404100000040030000000000803F0000A841}
    Fill.Color = claBlack
    HitTest = False
    Position.X = 308.000000000000000000
    Position.Y = 388.000000000000000000
    Size.Width = 25.000000000000000000
    Size.Height = 25.000000000000000000
    Size.PlatformDefault = False
    Stroke.Kind = None
    Visible = False
  end
  object PrototypeBindSource1: TPrototypeBindSource
    AutoActivate = True
    AutoPost = False
    FieldDefs = <
      item
        Name = 'CName'
        Generator = 'ContactNames'
        Options = [optShuffle]
        ReadOnly = False
      end
      item
        Name = 'CBonus'
        FieldType = ftCurrency
        Generator = 'Currency'
        ReadOnly = False
      end>
    ScopeMappings = <>
    Left = 144
    Top = 8
  end
  object BindingsList1: TBindingsList
    Methods = <>
    OutputConverters = <>
    Left = 28
    Top = 5
    object LinkListControlToField1: TLinkListControlToField
      Category = 'Liaisons rapides'
      DataSource = PrototypeBindSource1
      FieldName = 'CName'
      Control = ListBox1
      FillExpressions = <
        item
          SourceMemberName = 'CBonus'
          ControlMemberName = 'Detail'
        end>
      FillHeaderExpressions = <>
      FillBreakGroups = <>
    end
  end
end

J'ai tenté la piste nombre d'items de la liste (-1 pour l'item de recherche) différent de nombre d'enregistrements mais, s'agissant d'un TProtypeBindSource ce n'est pas bon (RecordCount=-1)
et de toute façon je trouve ce test "limite"

D'autres idées ?