delphi - I need help on how to implement class that can be shown in object Inspector

Question

i have

...
  TDispPitch = class
  private
    iLineSize: Integer;
    iLineColor: TColor;
    bDisplayAccent: Boolean;
    bVisible: Boolean;
  published
    property LineSize : Integer read iLineSize write iLineSize;
    ...etc
  end;
...

and i wanted this feature shown in Object Insepector to edit the settings.

i try adding

property DispPitch: TDispPitch read FDispPitch write FDispPitch. like 

the DispPitch can be shown but i cannot see its properties. like LineSize, LineColor etc.

Answer 1

You must derive your class from TPersistent, or a descendant, in order to make it available in the Object Inspector:

TDispPitch = class(TPersistent)
private
  ...
published
  property ...
  ...
end;

From Delphi Documentation:

TPersistent is the ancestor for all objects that have assignment and streaming capabilities.