[Pharo-project] Canvas >>draw: anObject

Stéphane Ducasse stephane.ducasse at inria.fr
Tue Feb 8 22:17:01 CET 2011


So it would be good to slowly start cleaning.
I will go over SM and make a long list of notes and clean SMs/Morphic when doing that.

Stef

> It is all rather messy.
> Note that #fullBounds can be different to #bounds if submorphs lie outside the bounds of the owner (parent).
> 
> Regards, Gary
> 
> ----- Original Message ----- From: "Igor Stasenko" <siguctua at gmail.com>
> To: <Pharo-project at lists.gforge.inria.fr>; <fernando.olivero at usi.ch>
> Sent: Tuesday, February 08, 2011 3:42 PM
> Subject: Re: [Pharo-project] Canvas >>draw: anObject
> 
> 
> On 8 February 2011 16:37, Fernando Olivero <fernando.olivero at usi.ch> wrote:
>> There's a method in Morph>>clipsSubmorphs , that dictates that behavior.
>> surely is on by default .
>> 
> 
> no. this is different.
> It tells whether submorphs can be drawn outside of morph's bounds, but
> nothing about morph itself.
> 
> In fact, i think many of these flags are redundant. For instance: if
> one wants submorphs to be drawn outside of morph's bounds,
> he can simply put them into morph's parent and so on up to topmost one
> - world..
> 
> 
>> Fernando
>> 
>> 
>> On Tue, Feb 8, 2011 at 10:20 AM, Stéphane Ducasse
>> <Stephane.Ducasse at inria.fr> wrote:
>>> Yes now apparently even if I draw outside the bounds they are clipped in pharo too. I have to check how.
>>> 
>>> On Feb 8, 2011, at 12:51 AM, Igor Stasenko wrote:
>>> 
>>>> On 7 February 2011 22:41, Stéphane Ducasse <stephane.ducasse at inria.fr> wrote:
>>>>> Canvas>>draw: anObject
>>>>> ^anObject drawOn: self
>>>>> 
>>>>> 
>>>>> Now in SM we got
>>>>> 
>>>>> SMxCanvas>>draw: anObject
>>>>> ^self clipBy: anObject bounds during: [ :c | anObject drawOn: c]
>>>>> 
>>>>> and I'm wondering what is the exact difference.
>>>>> Any idea?
>>>>> 
>>>> 
>>>> yes,
>>>> SMxCanvas ensures that not matter what happens, a morph cannot draw
>>>> outside of its declared bounds.
>>>> Which usually should not happen anyways.. so it looks like an
>>>> additional rule enforcement.
>>>> 
>>>> 
>>>> 
>>>>> Stef
>>>>> 
>>>> 
>>>> 
>>>> --
>>>> Best regards,
>>>> Igor Stasenko AKA sig.
>>>> 
>>> 
>>> 
>>> 
>>> 
>> 
>> 
> 
> 
> 
> -- 
> Best regards,
> Igor Stasenko AKA sig.
> 
> 





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