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+{ folderlister unit
+
+  Copyright (C) 2005-2017 Lagunov Aleksey alexs75@yandex.ru and Lazarus team
+  original conception from rx library for Delphi (c)
+
+  This library is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Library General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or (at your
+  option) any later version with the following modification:
+
+  As a special exception, the copyright holders of this library give you
+  permission to link this library with independent modules to produce an
+  executable, regardless of the license terms of these independent modules,and
+  to copy and distribute the resulting executable under terms of your choice,
+  provided that you also meet, for each linked independent module, the terms
+  and conditions of the license of that module. An independent module is a
+  module which is not derived from or based on this library. If you modify
+  this library, you may extend this exception to your version of the library,
+  but you are not obligated to do so. If you do not wish to do so, delete this
+  exception statement from your version.
+
+  This program is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
+  for more details.
+
+  You should have received a copy of the GNU Library General Public License
+  along with this library; if not, write to the Free Software Foundation,
+  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+}
+
+unit rxfolderlister;
+
+{$I rx.inc}
+
+interface
+
+uses
+  Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, Menus;
+
+
+type
+  { TCustomFolderLister }
+
+  TCustomFolderLister = class(TComponent)
+  private
+    FDefaultExt: string;
+    FMenuItem: TMenuItem;
+    FOnExecuteItem: TNotifyEvent;
+    FFileFolder: string;
+    FFileList:TStringList;
+    procedure DoFind(S:string; MenuItem:TMenuItem);
+    function GetCount: integer;
+    function GetFiles(Item: integer): string;
+    procedure SetMenuItem(const AValue: TMenuItem);
+    procedure SetFileFolder(const AValue: string);
+  protected
+    property FileFolder:string read FFileFolder write SetFileFolder;
+    property OnExecuteItem:TNotifyEvent read FOnExecuteItem write FOnExecuteItem;
+    property MenuItem:TMenuItem read FMenuItem write SetMenuItem;
+    property DefaultExt:string read FDefaultExt write FDefaultExt;
+    procedure InternalExecute(Sender: TObject);virtual;
+  public
+    procedure Execute;
+    constructor Create(AOwner: TComponent); override;
+    destructor Destroy; override;
+    property Files[Item:integer]:string read GetFiles;
+    property Count:integer read GetCount;
+  published
+  end;
+
+type
+  TFolderLister = class(TCustomFolderLister)
+  published
+    property DefaultExt;
+    property FileFolder;
+    property OnExecuteItem;
+    property MenuItem;
+  end;
+  
+implementation
+uses FileUtil, strutils, RxAppUtils, LazUTF8, LazFileUtils, rxconst;
+
+function MenuItemStr(S:string):string;
+var
+  i:integer;
+begin
+  Result:=Copy2Symb(ExtractFileName(S), '.');
+  if Result='' then exit;
+  for i:=1 to Length(Result) do
+  begin
+    if Result[i]='\' then Result[i]:='/' else
+    if Result[i]='_' then Result[i]:='.';
+  end;
+end;
+
+{ TCustomFolderLister }
+procedure TCustomFolderLister.DoFind(S: string; MenuItem: TMenuItem);
+var
+  Rec:TSearchRec;
+  R:integer;
+  AFileList,
+  AFolderList:TStringList;
+
+procedure CreateItems;
+var
+  i:integer;
+  M:TMenuItem;
+begin
+  for I:=0 to AFileList.Count-1 do
+  begin
+    FFileList.Add(AFileList[i]);
+    M:=TMenuItem.Create(Application.MainForm);
+    M.Caption:=MenuItemStr(AFileList[i]);
+    M.Hint:=MenuItemStr(AFileList[i]);
+    MenuItem.Add(M);
+    M.Tag:=FFileList.Count-1;
+    M.OnClick:=@InternalExecute;
+  end;
+end;
+
+procedure CreateSubItems;
+var
+  i:integer;
+  M:TMenuItem;
+  S:string;
+begin
+  for i:=0 to AFolderList.Count-1 do
+  begin
+    M:=TMenuItem.Create(MenuItem.Owner);//Application.MainForm);
+    S:=AFolderList[i];
+    M.Caption:=MenuItemStr(S);
+    MenuItem.Add(M);
+    DoFind(AFolderList[i]+DirectorySeparator,M);
+  end;
+end;
+
+var
+  SS:string;
+begin
+  AFolderList:=TStringList.Create;
+  AFolderList.Sorted:=true;
+  AFileList:=TStringList.Create;
+  AFolderList.Sorted:=true;
+  try
+    R:=FindFirstUTF8(S+AllMask,faAnyFile, Rec);
+    while R=0 do
+    begin
+      if ((Rec.Attr and faDirectory) <>0) and (Rec.Name<>'.') and (Rec.Name<>'..') then
+      begin
+        SS:=S+Rec.Name;
+        AFolderList.Add(SS)
+      end
+      else
+      begin
+        if UTF8LowerCase(ExtractFileExt(Rec.Name))=UTF8LowerCase(FDefaultExt) then
+        begin
+          SS:=S+Rec.Name;
+          AFileList.Add(SS);
+        end;
+      end;
+      R:=FindNextUTF8(Rec);
+    end;
+    FindCloseUTF8(Rec);
+    CreateSubItems;
+    CreateItems;
+  finally
+    AFolderList.Free;
+    AFileList.Free;
+  end;
+end;
+
+function TCustomFolderLister.GetCount: integer;
+begin
+  Result:=FFileList.Count;
+end;
+
+function TCustomFolderLister.GetFiles(Item: integer): string;
+begin
+  Result:=FFileList[Item];
+end;
+
+procedure TCustomFolderLister.SetMenuItem(const AValue: TMenuItem);
+begin
+  if FMenuItem=AValue then exit;
+  FMenuItem:=AValue;
+end;
+
+procedure TCustomFolderLister.SetFileFolder(const AValue: string);
+begin
+  if FFileFolder=AValue then exit;
+  FFileFolder:=AValue;
+  if FFileFolder<>'' then
+    if FFileFolder[Length(FFileFolder)]<>DirectorySeparator then
+      FFileFolder:=FFileFolder+DirectorySeparator;
+end;
+
+procedure TCustomFolderLister.InternalExecute(Sender: TObject);
+begin
+  if Assigned(FOnExecuteItem) then
+    FOnExecuteItem(Sender)
+end;
+
+procedure TCustomFolderLister.Execute;
+begin
+  if Assigned(FMenuItem) then
+    DoFind(FFileFolder, FMenuItem)
+  else
+    raise Exception.CreateFmt( sFolderListerErr, [Name]);
+end;
+
+constructor TCustomFolderLister.Create(AOwner: TComponent);
+begin
+  inherited Create(AOwner);
+  FFileList:=TStringList.Create;
+  FFileList.Sorted:=false;
+end;
+
+destructor TCustomFolderLister.Destroy;
+begin
+  FFileList.Free;
+  inherited Destroy;
+end;
+
+end.