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{$mode objfpc}
program test05;
uses
SysUtils;
type
QObjectH = class(TObject) end;
QWidgetH = class(QObjectH) end;
IQbase = interface(IUnknown)
end;
TQBase = class(TInterfacedObject,IQBase)
protected
fQHandle : TObject;
function GetQHandle : TObject;
procedure SetQHandle(Value : TObject);
public
property QHandle : TObject read GetQHandle write SetQHandle;
end;
IQObject = interface(IQBase)
function GetQHandle : QObjectH;
property QHandle : QObjectH read GetQHandle;
end;
TQObject = class(TQBase, IQObject)
protected
function GetQHandle : QObjectH; overload;
procedure SetQHandle(Value:QObjectH);
public
property QHandle : QObjectH read GetQHandle write SetQHandle;
constructor CreateWrapper;
Constructor Create(name: PAnsiChar); overload;
end;
IQWidget = interface(IQObject)
function GetQHandle : QWidgetH;
property QHandle : QWidgetH read GetQHandle;
function Width: Integer;
end;
TQWidget = class(TQObject, IQWidget)
protected
function GetQHandle : QWidgetH; overload;
procedure SetQHandle(Value:QWidgetH);
public
property QHandle : QWidgetH read GetQHandle write SetQHandle;
constructor CreateWrapper;
Constructor Create(name: PAnsiChar); overload;
function Width: Integer;
end;
function TQObject.GetQHandle : QObjectH;
begin
if Self <> nil then Result := QObjectH(fQHandle)
else Result := nil;
end;
procedure TQObject.SetQHandle(Value : QObjectH);
begin
fQHandle := TObject(Value);
end;
constructor TQObject.CreateWrapper;
begin
inherited Create;
end;
Constructor TQObject.Create(name: PAnsiChar);
begin
CreateWrapper;
end;
function TQBase.GetQHandle : TObject;
begin
Result := fQHandle
end;
procedure TQBase.SetQHandle(Value : TObject);
begin
fQHandle:=Value;
end;
function TQWidget.GetQHandle : QWidgetH;
begin
write(' entering TQWidget.GetQHandle ...');
if Self <> nil then Result := QWidgetH(fQHandle)
else Result := nil;
writeln('...leaving entering TQWidget.GetQHandle');
end;
procedure TQWidget.SetQHandle(Value : QWidgetH);
begin
fQHandle := TObject(Value);
end;
constructor TQWidget.CreateWrapper;
begin
write(' entering TQWidget.CreateWrapper ...');
inherited Create;
writeln('...leaving TQWidget.CreateWrapper');
end;
Constructor TQWidget.Create(name: PAnsiChar);
begin
write('entering TQWidget.Create ...');
CreateWrapper;
writeln('... leaving TQWidget.Create');
end;
function TQWidget.Width: Integer;
begin
write(' entering TQWidget.Width...');
Result:=123;
writeln('...leaving TQWidget.Width');
end;
function GetWidget : IQWidget;
begin
Result := TQWidget.CreateWrapper;
end;
begin
writeln('GetWidget.Width (123)?:',GetWidget.Width);
if GetWidget.Width<>123 then
begin
writeln('error');
halt(1);
end;
end.
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