class derived from TForm not in object inspector

[watte]

hello!

Sorry my english is not good, but I hope you can understand me... 

I programmed a new Form (TMySpecialForm) derived form TForm with additional published properties. But the object inspector will not show this.
It seems, that the ide (on loading the unit) allways creates TForm?.

what could be wrong? 

[Marc]

The IDE only can do RTTI on components installed into the IDE. IT needs the compiled form RTTI info to show the propereties.

[watte]

RTTI?! - What can I do? My form is in a package. Is there a special way to register my form?



I did Register a new FileDescriptor with RegisterProjectFileDescriptor. Than I got a new Option in the menu "New...". When I klick this new Form, I got a new unit with my TMySpecialForm and the objectinspector show my additional properties too.   work fine!

But after saving and load the project, lazarus tell me property "X" do not exist... and so on. And the object inspector shows just the TForm-properties 

So I had debug the lazarus-project on loading my project. -> The IDE do seeing that my Form is a TMySpecialForm

  ( JITForms ) -> ( function TJITComponentList.DoCreateJITComponent )
Instance:=TComponent(FCurReadClass.NewInstance);

...but creates always a TForm

  ( JITForms ) -> ( function TJITComponentList.DoCreateJITComponent )
Instance.Create(nil);

-> jump to "TForm.Create(..."

is it a bug? or have I to register something more?

[Marc]

RTTI?! - What can I do? My form is in a package. Is there a special way to register my form?

that wasn't clear from your first post. Indeed, the IDE should now know your form.

I did Register a new FileDescriptor with RegisterProjectFileDescriptor. Than I got a new Option in the menu "New...". When I klick this new Form, I got a new unit with my TMySpecialForm and the objectinspector show my additional properties too.   work fine!

Thats good.

But after saving and load the project, lazarus tell me property "X" do not exist... and so on. And the object inspector shows just the TForm-properties 

So I had debug the lazarus-project on loading my project. -> The IDE do seeing that my Form is a TMySpecialForm

  ( JITForms ) -> ( function TJITComponentList.DoCreateJITComponent )
Instance:=TComponent(FCurReadClass.NewInstance);

What is FCurReadClass.NewInstance calling ? And what is Instance ?

...but creates always a TForm

  ( JITForms ) -> ( function TJITComponentList.DoCreateJITComponent )
Instance.Create(nil);

-> jump to "TForm.Create(..."

Do you have a virtual overridden TMySpecialForm.Create() ? If not then TForm.Create is called.

[watte]

Thanks for your answer!

What is FCurReadClass.NewInstance calling ? And what is Instance ?

( lazarus/designer/jitforms.pp )

FCurReadClass is a class of TMySpecialForm1 (the name of the class in my project. unit1 -> TMySpecialForm1 = class(TMySpecialForm)... )
FCurReadClass.NewInstance jump to class function TLCLComponent.NewInstance: TObject;
Instance is a TComponent

Do you have a virtual overridden TMySpecialForm.Create() ? If not then TForm.Create is called.

Yes I have a overridden Create in my class, but the IDE jumps just to TForm.Create

..Indeed, the IDE should now know your form.

In my package, all components are registert by RegisterComponent. But not my forms (because it is no component). Maybe that is the reason...
I don't know how to register a form. Is there a special function?

[Marc]

FCurReadClass is a class of TMySpecialForm1 (the name of the class in my project. unit1 -> TMySpecialForm1 = class(TMySpecialForm)... )

How did you check if it contains a class of TMySpecialForm1 ? Since if this is the case then your create should have been called.

Marc

[watte]

when I run my project, the create of my class will be call. but when the IDE load my project and my unit with my class, the IDE is just call the TForm.Create... 

Never mind!
I give it up. - I will create a component that will have the features and properties of my special form. And on create of the component's owner, it will be install this features in the (TForm). - at runtime...


thank you very much for help!