Michael Van Canneyt schreef:
On Wed, 13 Dec 2006, Vincent Snijders wrote:
Michael Van Canneyt schreef:
On Wed, 13 Dec 2006, Vincent Snijders wrote:
Michael Van Canneyt schreef:
On Tue, 12 Dec 2006, [EMAIL PROTECTED] wrote:
As said in an earlier mail I have problems streaming the property
EditLabel: TBoundLabel read FEditLabel;
of a TLabeledEdit with fpc 2.1.1.
Some discussion on #fpc led to the conclusion that streaming a
readonly
persistant should be allowed, because you write to the properties of
the
readonly persistant property.
Attached is a proposal to fix it.
Delphi does not stream readonly properties. So we won't either.
The proper solution for this is support for csSubComponent in
TComponent.
Can you elaborate a bit, what you mean by that? What should be changed and
where?
Delphi has a ComponentState csSubComponent. This flag should be set
if you publish a property of type TComponent, and the TComponent instance
is 'owned' by the object that publishes it, i.e. it's NOT a reference to an
other existing TComponent.
The owned TComponent has 'csSubComponent' in it's componentstyle. This tells
delphi to stream the component's properties as part of it's owning
component, and not just a reference to it.
The IDE will need support for this, as well TComponent and the streaming
system. (The latter part is probably the easy part ;) )
So far so good.
The IDE supports this (no drop downbox in the IO, but you can expand to set
the owned component's properties). The owned component has the csSubComponent
in its component style:
Include(FEditLabel.ComponentStyle, csSubComponent);
Include(FEditLabel.ControlStyle, csNoDesignSelectable);
So where should the streaming occur?
When EditLabel is encountered ?
I am not sure I understand your question.
EditLabel is a published property of TLabeledEdit.
Should I amend to patch to allow streaming properties of readonly
subcomponents?
Yes, please do. It should be quite like the check you made before...
I will try.
Vincent
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