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unit HelpConnectionUnit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, LHelpControl,
Buttons, StdCtrls, LazFileUtils;
const
IPCFile = 'letstestagain';
type
{ TForm1 }
TForm1 = class(TForm)
Button1: TButton;
Label1: TLabel;
OpenDialog1: TOpenDialog;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
public
function GetLHelpFilename: string;
end;
var
Form1: TForm1;
Help: TLHelpConnection;
implementation
{ TForm1 }
function ResponseToString(Ares: TLHelpResponse): String;
begin
case Ares of
srNoAnswer: Result := 'NoAnswer';
srSuccess: Result := 'Success';
srInvalidFile: Result := 'InvalidFileName';
srInvalidURL: Result := 'InvalidURL';
srInvalidContext: Result := 'InvalidContext';
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
Res: TLHelpResponse;
begin
OpenDialog1.InitialDir:=GetCurrentDirUTF8;
if not OpenDialog1.Execute then exit;
Screen.Cursor := crHourGlass;
try
if Help.ServerRunning = false then
Help.StartHelpServer(IPCFile, GetLHelpFilename);
Res := Help.OpenFile(OpenDialog1.FileName);
finally
Screen.Cursor := crDefault;
end;
Label1.Caption := ResponseToString(Res);
end;
procedure TForm1.FormCreate(Sender: TObject);
var
LHelp: String;
begin
{$IFDEF Unix}
DeleteFile('/tmp/'+IPCFile);
{$ENDIF}
LHelp := GetLHelpFilename;
if not FileExistsUTF8(LHelp) then
MessageDlg('Missing lhelp','Can not find the lhelp application "'+LHelp+'"',
mtError,[mbOk],0);
Help := TLHelpConnection.Create;
Help.ProcessWhileWaiting := @Application.ProcessMessages;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
Help.Free;
end;
function TForm1.GetLHelpFilename: string;
begin
Result := '../lhelp/lhelp';
{$IFDEF Windows}
Result := '..\lhelp\lhelp.exe';
{$ENDIF}
{$IFDEF darwin} //OS X
Result:=Result+'.app/Contents/MacOS/'+ExtractFilename(Result);
{$ENDIF}
end;
{$R *.lfm}
end.
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