unit URegEdit;

interface
uses
    Windows, Registry;

type
    TRegEdit = class(TObject)
    private
        Reg: TRegistry;
        ivAppName: String;

        function getRootKey(): HKey;
        procedure setRootKey(toKey: HKey);
        procedure setAppName(toName: String);
    public
        constructor Create;
        destructor Destroy; override;

        procedure WriteSetting(Section, Value: String); overload;
        procedure WriteSetting(Section: String; Value: Integer); overload;
        procedure WriteSetting(Section: String; Value: Boolean); overload;

        procedure DeleteSection(Section: String);

        function ReadString(Section, Default: String): String;
        function ReadInteger(Section: String; Default: Integer): Integer;
        function ReadBoolean(Section: String; Default: Boolean): Boolean;

        property RootKey: HKey Read getRootKey Write setRootKey;
        property AppName: String Read ivAppName Write setAppName;
    end;

implementation

constructor TRegEdit.Create;
begin
    Reg := TRegistry.Create;
    Reg.RootKey := HKEY_CURRENT_USER;
end;

destructor TRegEdit.Destroy;
begin
    if(Length(AppName) > 0) then
    begin
        Reg.CloseKey;
    end;
    
    Reg.Free;

    inherited Destroy;
end;

procedure TRegEdit.WriteSetting(Section, Value: String);
begin
    Reg.WriteString(Section, Value);
end;

procedure TRegEdit.setRootKey(toKey: HKey);
begin
    Reg.RootKey := toKey;
end;

function TRegEdit.getRootKey(): HKey;
begin
    getRootKey := Reg.RootKey;
end;

procedure TRegEdit.setAppName(toName: String);
begin
    if Reg.OpenKey('\Software\' + toName, True) then
    begin
        ivAppName := toName;
    end;
end;

function TRegEdit.ReadString(Section, Default: String): String;
begin
    if(Length(AppName) > 0) and Reg.ValueExists(Section) and (Reg.GetDataType(Section) = rdString) then
    begin
        ReadString := Reg.ReadString(Section);
    end
    else
    begin
        Result := Default;
    end;
end;

procedure TRegEdit.WriteSetting(Section: String; Value: Integer);
begin
    Reg.WriteInteger(Section, Value);
end;

procedure TRegEdit.WriteSetting(Section: String; Value: Boolean);
begin
    Reg.WriteBool(Section, Value);
end;

function TRegEdit.ReadInteger(Section: String; Default: Integer): Integer;
begin
    if(Length(AppName) > 0) and Reg.ValueExists(Section)and (Reg.GetDataType(Section) = rdInteger) then
    begin
        Result := Reg.ReadInteger(Section);
    end
    else
    begin
        Result := Default;
    end;
end;

function TRegEdit.ReadBoolean(Section: String; Default: Boolean): Boolean;
begin
    if(Length(AppName) > 0) and Reg.ValueExists(Section) and (Reg.GetDataType(Section) = rdInteger) then
    begin
        ReadBoolean := Reg.ReadBool(Section);
    end
    else
    begin
        Result := Default;
    end;
end;

procedure TRegEdit.DeleteSection(Section: String);
begin
    if(Length(AppName) > 0) and Reg.ValueExists(Section) then
    begin
        reg.DeleteValue(Section);
    end;
end;

end.