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{ Old file: tbs0249.pp }
{ procedure of object cannot be assigned to property. OK 0.99.11 (PFV) }
program TestEvent;
{$mode objfpc}
{$M+}
type
TNotifyEvent = procedure( Sender: TObject ) of object;
THost = class
protected
FOnEvent: TNotifyEvent;
procedure SetOnEvent( Value: TNotifyEvent );
public
constructor Create;
procedure Trigger;
procedure SayHello;
published
property OnEvent: TNotifyEvent read FOnEvent write SetOnEvent;
end;
TDummy = class
procedure HandleEvent( Sender: TObject );
end;
constructor THost.Create;
begin
FOnEvent := nil;
end;
procedure THost.Trigger;
begin
if @FOnEvent <> nil then
FOnEvent( Self )
end;
procedure THost.SetOnEvent( Value: TNotifyEvent );
begin
FOnEvent := Value
end;
procedure THost.SayHello;
begin
Writeln( 'Hello event' )
end;
procedure TDummy.HandleEvent( Sender: TObject );
begin
THost( Sender ).SayHello
end;
var
Host: THost;
Dummy: TDummy;
begin
Dummy := TDummy.Create;
Host := THost.Create;
with Host,Dummy do
OnEvent := @HandleEvent; // this is 57, 27 is ";"
Host.Trigger;
end.
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