Re: [Lazarus] Something the examine Lazarus or applications?
On Mon, Jan 11, 2016 at 12:58 PM, Anthony Walter wrote: > Others: If I can dig up my D7 SE installer I'll attempt to verify. I > distinctly remember being surprised at this behavior in D5 1999, but I > could be mis-remembering. > I've D7 here. I tried Ondrej's sample here and it throws the assertion error. It's also hard to understand how would Owner = nil be forced to Owner = Application for console programs, where "Forms" unit is not used. thanks, Dmitry -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
Bart: Not really. When you free a component it's removed from the owner's list. Others: If I can dig up my D7 SE installer I'll attempt to verify. I distinctly remember being surprised at this behavior in D5 1999, but I could be mis-remembering. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
On 11.01.2016 18:26, Bart wrote: That would lead to crashes all over the place: C:=TComponent.Create(nil); try ... finally C.Free; end; Upon app termination the Application object would the again try to free C (note: it is not nil) -> Access Violation. No, you are also wrong :) The owner is detached in the destructor. See: Destructor TComponent.Destroy; [...] If FOwner<>Nil Then FOwner.RemoveComponent(Self); inherited destroy; end; Of course this works: C:=TComponent.Create(Application); try ... finally C.Free; end; Ondrej -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
On 11.01.2016 17:44, Anthony Walter wrote: > I Delphi at least if you create a component with AOwner set to nil it > actually (tested under Delphi 7 at least) would set the Owner to > Application. That would lead to crashes all over the place: C:=TComponent.Create(nil); try ... finally C.Free; end; Upon app termination the Application object would the again try to free C (note: it is not nil) -> Access Violation. Bart -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
On 01/11/2016 11:07 AM, Michael Van Canneyt wrote: On Mon, 11 Jan 2016, Ondrej Pokorny wrote: On 11.01.2016 17:44, Anthony Walter wrote: I Delphi at least if you create a component with AOwner set to nil it actually (tested under Delphi 7 at least) would set the Owner to Application. You are wrong: Assert(TComponent.Create(nil).Owner = Application); I also never heard of this, and I develop applications since way before Delphi 7. CreateForm did this, but for forms not components. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
On Mon, 11 Jan 2016, Ondrej Pokorny wrote: On 11.01.2016 17:44, Anthony Walter wrote: I Delphi at least if you create a component with AOwner set to nil it actually (tested under Delphi 7 at least) would set the Owner to Application. You are wrong: Assert(TComponent.Create(nil).Owner = Application); I also never heard of this, and I develop applications since way before Delphi 7. Michael. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
On 11.01.2016 17:44, Anthony Walter wrote: I Delphi at least if you create a component with AOwner set to nil it actually (tested under Delphi 7 at least) would set the Owner to Application. You are wrong: Assert(TComponent.Create(nil).Owner = Application); Ondrej -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
I Delphi at least if you create a component with AOwner set to nil it actually (tested under Delphi 7 at least) would set the Owner to Application. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Something the examine Lazarus or applications?
On Mon, 11 Jan 2016, Anthony Walter wrote: Relevant link: http://www.codebot.org/delphi/?doc=9579 My question is: Does anything like this already exist for Lazarus? To my knowledge no such thing exists yet for Lazarus ? I have something similar for my own applications, and it is indeed very handy, so I am definitely interested in seeing this in Lazarus. I am wondering, how can it find all live components ? As soon as you do a TSomeComponent.Create(Nil); then it cannot be found. Michael. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
[Lazarus] Something the examine Lazarus or applications?
Relevant link: http://www.codebot.org/delphi/?doc=9579 I've been submitting few patches the past few days and am considering submitting a few more complex fixes, mostly having to do with the new docked form editor and the new menu editor. As I get more involved I am trying to figure out which IDE elements (components and controls) I am looking at (or perhaps which ones are hidden) and finding of their class names and the units to which they belong. When I was working with Delphi extensions I wrote the tool linked at the top of this message. The tool can either be inserted into the IDE or into your own applications: Basically what it does is allow you to see the entire tree of live components in the IDE (or your application). It shows you the class hierarchy of whatever you select along with the properties (which you could edit), the embedded resources (lfm as text), package information, and even an image capture of the live object if it was a control. My question is: Does anything like this already exist for Lazarus? I don't need all the feature I described, but it would be nice to be able to examine the IDE to find the names of the components I am trying to fix. For example, the main menu bar being attached to the docked form designer. I could create a simplified version for Lazarus of the tool I linked at the top of this message, but if something similar already exists for Lazarus I'd prefer to use it. Thanks. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
