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{*****************************************************************************}
{ }
{ Tnt Delphi Unicode Controls }
{ http://tnt.ccci.org/delphi_unicode_controls/ }
{ Version: 2.1.11 }
{ }
{ Copyright (c) 2002-2004, Troy Wolbrink (troy.wolbrink@ccci.org) }
{ }
{*****************************************************************************}
unit TntAxCtrls;
{$INCLUDE TntCompilers.inc}
interface
uses
ComObj, StdVcl, AxCtrls, TntClasses;
type
TWideStringsAdapter = class(TAutoIntfObject, IStrings, IWideStringsAdapter)
private
FStrings: TTntStrings;
protected
{ IWideStringsAdapter }
procedure ReferenceStrings(S: TTntStrings);
procedure ReleaseStrings;
{ IStrings }
function Get_ControlDefault(Index: Integer): OleVariant; safecall;
procedure Set_ControlDefault(Index: Integer; Value: OleVariant); safecall;
function Count: Integer; safecall;
function Get_Item(Index: Integer): OleVariant; safecall;
procedure Set_Item(Index: Integer; Value: OleVariant); safecall;
procedure Remove(Index: Integer); safecall;
procedure Clear; safecall;
function Add(Item: OleVariant): Integer; safecall;
function _NewEnum: IUnknown; safecall;
public
constructor Create(Strings: TTntStrings);
end;
implementation
uses
Classes, {$IFDEF COMPILER_6_UP} Variants, {$ELSE} Windows, {$ENDIF} ActiveX;
{ TStringsEnumerator }
type
TStringsEnumerator = class(TContainedObject, IEnumString)
private
FIndex: Integer; // index of next unread string
FStrings: IStrings;
public
constructor Create(const Strings: IStrings);
function Next(celt: Longint; out elt;
pceltFetched: PLongint): HResult; stdcall;
function Skip(celt: Longint): HResult; stdcall;
function Reset: HResult; stdcall;
function Clone(out enm: IEnumString): HResult; stdcall;
end;
constructor TStringsEnumerator.Create(const Strings: IStrings);
begin
inherited Create(Strings);
FStrings := Strings;
end;
function TStringsEnumerator.Next(celt: Longint; out elt; pceltFetched: PLongint): HResult;
var
I: Integer;
begin
I := 0;
while (I < celt) and (FIndex < FStrings.Count) do
begin
TPointerList(elt)[I] := PWideChar(WideString(FStrings.Item[FIndex]));
Inc(I);
Inc(FIndex);
end;
if pceltFetched <> nil then pceltFetched^ := I;
if I = celt then Result := S_OK else Result := S_FALSE;
end;
function TStringsEnumerator.Skip(celt: Longint): HResult;
begin
if (FIndex + celt) <= FStrings.Count then
begin
Inc(FIndex, celt);
Result := S_OK;
end
else
begin
FIndex := FStrings.Count;
Result := S_FALSE;
end;
end;
function TStringsEnumerator.Reset: HResult;
begin
FIndex := 0;
Result := S_OK;
end;
function TStringsEnumerator.Clone(out enm: IEnumString): HResult;
begin
try
enm := TStringsEnumerator.Create(FStrings);
TStringsEnumerator(enm).FIndex := FIndex;
Result := S_OK;
except
Result := E_UNEXPECTED;
end;
end;
{ TWideStringsAdapter }
constructor TWideStringsAdapter.Create(Strings: TTntStrings);
var
StdVcl: ITypeLib;
begin
OleCheck(LoadRegTypeLib(LIBID_STDVCL, 4, 0, 0, StdVcl));
inherited Create(StdVcl, IStrings);
FStrings := Strings;
end;
procedure TWideStringsAdapter.ReferenceStrings(S: TTntStrings);
begin
FStrings := S;
end;
procedure TWideStringsAdapter.ReleaseStrings;
begin
FStrings := nil;
end;
function TWideStringsAdapter.Get_ControlDefault(Index: Integer): OleVariant;
begin
Result := Get_Item(Index);
end;
procedure TWideStringsAdapter.Set_ControlDefault(Index: Integer; Value: OleVariant);
begin
Set_Item(Index, Value);
end;
function TWideStringsAdapter.Count: Integer;
begin
Result := 0;
if FStrings <> nil then Result := FStrings.Count;
end;
function TWideStringsAdapter.Get_Item(Index: Integer): OleVariant;
begin
Result := NULL;
if (FStrings <> nil) then Result := WideString(FStrings[Index]);
end;
procedure TWideStringsAdapter.Set_Item(Index: Integer; Value: OleVariant);
begin
if (FStrings <> nil) then FStrings[Index] := Value;
end;
procedure TWideStringsAdapter.Remove(Index: Integer);
begin
if FStrings <> nil then FStrings.Delete(Index);
end;
procedure TWideStringsAdapter.Clear;
begin
if FStrings <> nil then FStrings.Clear;
end;
function TWideStringsAdapter.Add(Item: OleVariant): Integer;
begin
Result := -1;
if FStrings <> nil then Result := FStrings.Add(Item);
end;
function TWideStringsAdapter._NewEnum: IUnknown;
begin
Result := TStringsEnumerator.Create(Self);
end;
end.
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