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TEMMO stream with empty lines

My descendant TMemo has a constructor

constructor TMyMemo.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  Lines.Clear;
end;

When I put TMyMemo on the form, I get the error "Control" has no parent window. ". Why?

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2 answers


The newly created note has no content. But content is added as soon as the component gets a name, which the designer automatically performs. To prevent this, remove csSetCaption

from ControlStyle

:



constructor TMyMemo.Create(AOwner: TComponent); 
begin 
  inherited Create(AOwner); 
  ControlStyle := ControlStyle - [csSetCaption];
end;
+17


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Move Lines.Clear to override CreateWnd method. Stream window control (multi-line edit) does not exist during creation run



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