examples/Delphi/ExEnumFU.pas

(* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is TurboPower SysTools
 *
 * The Initial Developer of the Original Code is
 * TurboPower Software
 *
 * Portions created by the Initial Developer are Copyright (C) 1996-2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * ***** END LICENSE BLOCK ***** *)

unit ExEnumFU;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    CheckBox1: TCheckBox;
    ListBox1: TListBox;
    Label1: TLabel;
    CheckBox2: TCheckBox;
    Button2: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    AList : TStringList;
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

uses
  StConst,
  StBase,
  StSystem;

var
  StopIt : Boolean;

function ProcessAll(const SR : TSearchRec; ForInclusion : Boolean;
  var Abort : Boolean) : Boolean;
begin
  Abort := False;
  if StopIt then begin
    Abort := True;
    Result := False;
  end
  else begin
    Application.ProcessMessages;
    Result := True;
  end;
end;

function TextFilesOnly(const SR : TSearchRec; ForInclusion : Boolean;
  var Abort : Boolean) : Boolean;
var
  S : String;
begin
  Abort := False;
  if StopIt then begin
    Abort := True;
    Result := False;
  end
  else begin
    Application.ProcessMessages;

    if ForInclusion then begin
      Result := False;
      S := SR.Name;
      if (UpperCase(ExtractFileExt(S)) = '.TXT') or
         ((SR.Attr and faDirectory) > 0) then
        Result := True;
    end
    else
      Result := True;

  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  AList := TStringList.Create;
  Edit1.Text := 'C:\';
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  I : longint;
begin
  AList.Clear;
  ListBox1.Clear;

  Screen.Cursor := crHourGlass;
  StopIt := False;

  if not CheckBox2.Checked then begin
    EnumerateFiles(Edit1.Text, AList, CheckBox1.Checked, ProcessAll);
    ListBox1.Items := AList;
  end else begin
    EnumerateFiles(Edit1.Text, AList, CheckBox1.Checked, TextFilesOnly);
    {by its nature, EnumerateFiles also returns directory names}
    {remove those from the list - leaving only the text files}
    for I := 0 to AList.Count-1 do
      if (UpperCase(ExtractFileExt(AList[I])) = '.TXT') then
        ListBox1.Items.Add(AList[I]);
  end;

  Screen.Cursor := crDefault;
  ListBox1.Update;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  StopIt := True;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  AList.Free;
end;

end.
1	(* *** BEGIN LICENSE BLOCK ***
2	* Version: MPL 1.1
3	*
4	* The contents of this file are subject to the Mozilla Public License Version
5	* 1.1 (the "License"); you may not use this file except in compliance with
6	* the License. You may obtain a copy of the License at
7	* http://www.mozilla.org/MPL/
8	*
9	* Software distributed under the License is distributed on an "AS IS" basis,
10	* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11	* for the specific language governing rights and limitations under the
12	* License.
13	*
14	* The Original Code is TurboPower SysTools
15	*
16	* The Initial Developer of the Original Code is
17	* TurboPower Software
18	*
19	* Portions created by the Initial Developer are Copyright (C) 1996-2002
20	* the Initial Developer. All Rights Reserved.
21	*
22	* Contributor(s):
23	*
24	* *** END LICENSE BLOCK *** *)
25
26	unit ExEnumFU;
27
28	interface
29
30	uses
31	Windows, Messages, SysUtils, Classes, Graphics, Controls,
32	Forms, Dialogs, StdCtrls;
33
34	type
35	TForm1 = class(TForm)
36	Button1: TButton;
37	Edit1: TEdit;
38	CheckBox1: TCheckBox;
39	ListBox1: TListBox;
40	Label1: TLabel;
41	CheckBox2: TCheckBox;
42	Button2: TButton;
43	procedure FormCreate(Sender: TObject);
44	procedure Button1Click(Sender: TObject);
45	procedure Button2Click(Sender: TObject);
46	procedure FormDestroy(Sender: TObject);
47	private
48	{ Private declarations }
49	public
50	{ Public declarations }
51	AList : TStringList;
52	end;
53
54	var
55	Form1: TForm1;
56
57	implementation
58
59	{$R *.DFM}
60
61	uses
62	StConst,
63	StBase,
64	StSystem;
65
66	var
67	StopIt : Boolean;
68
69	function ProcessAll(const SR : TSearchRec; ForInclusion : Boolean;
70	var Abort : Boolean) : Boolean;
71	begin
72	Abort := False;
73	if StopIt then begin
74	Abort := True;
75	Result := False;
76	end
77	else begin
78	Application.ProcessMessages;
79	Result := True;
80	end;
81	end;
82
83	function TextFilesOnly(const SR : TSearchRec; ForInclusion : Boolean;
84	var Abort : Boolean) : Boolean;
85	var
86	S : String;
87	begin
88	Abort := False;
89	if StopIt then begin
90	Abort := True;
91	Result := False;
92	end
93	else begin
94	Application.ProcessMessages;
95
96	if ForInclusion then begin
97	Result := False;
98	S := SR.Name;
99	if (UpperCase(ExtractFileExt(S)) = '.TXT') or
100	((SR.Attr and faDirectory) > 0) then
101	Result := True;
102	end
103	else
104	Result := True;
105
106	end;
107	end;
108
109	procedure TForm1.FormCreate(Sender: TObject);
110	begin
111	AList := TStringList.Create;
112	Edit1.Text := 'C:\';
113	end;
114
115	procedure TForm1.Button1Click(Sender: TObject);
116	var
117	I : longint;
118	begin
119	AList.Clear;
120	ListBox1.Clear;
121
122	Screen.Cursor := crHourGlass;
123	StopIt := False;
124
125	if not CheckBox2.Checked then begin
126	EnumerateFiles(Edit1.Text, AList, CheckBox1.Checked, ProcessAll);
127	ListBox1.Items := AList;
128	end else begin
129	EnumerateFiles(Edit1.Text, AList, CheckBox1.Checked, TextFilesOnly);
130	{by its nature, EnumerateFiles also returns directory names}
131	{remove those from the list - leaving only the text files}
132	for I := 0 to AList.Count-1 do
133	if (UpperCase(ExtractFileExt(AList[I])) = '.TXT') then
134	ListBox1.Items.Add(AList[I]);
135	end;
136
137	Screen.Cursor := crDefault;
138	ListBox1.Update;
139	end;
140
141	procedure TForm1.Button2Click(Sender: TObject);
142	begin
143	StopIt := True;
144	end;
145
146	procedure TForm1.FormDestroy(Sender: TObject);
147	begin
148	AList.Free;
149	end;
150
151	end.