[Cuis-dev] VectorGraphics and Morph

[Juan Vuletich]

On 7/27/2020 7:55 PM, Juan Vuletich via Cuis-dev wrote:
> On 7/27/2020 7:25 AM, Hilaire Fernandes via Cuis-dev wrote:
>>
>> I understood what happened, when the image is saved, the benefit of 
>> this execution is lost and should be executed again before operating 
>> anythings:
>>
>>     self runningWorld setCanvas: (HybridCanvas onForm: Display).
>>
>>     self runningWorld canvas class.
>>
>> Hilaire
>>
>> Le 23/07/2020 à 19:00, Hilaire Fernandes a écrit :
>>>
>>> Whne I save the image (I think with the Ellipse morph destroyed) 
>>> then start the image again I have this DNU on 
>>> EllipseMorph2>>morphContainsPoint:
>>>
>>> Btw, why can't I find the error log file?
>>>
>> -- 
>> GNU Dr. Geo
>> http://drgeo.eu
>
> Hi Hilaire, Folks,
>
> I've been working on a new implementation. It starts to work 
> reasonably well.
>
> The HybridCanvas will choose automatically between BitBlt and 
> VectorCanvas depending on the morpt to be drawn. The 
> RectangleLikeMorph hierarchy will be drawn using BitBlt, unless 
> rotated or scaled. Other Morph classes will use VectorCanvas. Play, 
> for example, with EllipseMorph2 and EllipseMorph3.
>
> The code is in 77 changesets. To make it easier for you to play with 
> all this, I prepared a couple of images.
>
> Check
> https://www.dropbox.com/s/lppb9a3k7q3t9qs/VectorGraphicsCoreUpdates.zip?dl=0
> https://www.dropbox.com/s/cptwrfsu2bm36nn/VGExperimentsImage.zip?dl=0
> https://www.dropbox.com/s/08fq770i6wi3eds/VGExperiments32Image.zip?dl=0
>
> If you want to load the changesets, in a Cuis updated to #4253 do:
> - Feature require: 'VectorGraphics'
> - Load the changesets in order. Copying them to an CoreUpdates folder 
> and installing new updates should work.
> - MorphicCanvas activeSubclass: HybridCanvas
> - Set system font: DejaVu Sans
> - World / New Morph… / EllipseMorph3, for example.
> Try the "new" rotate / zoom handle (yes, I know. They should be 2 
> separate handles!). Browse the code. Check how simple a VG morph can 
> be! Check that you can grab the ellipse from any inner pixel, and no 
> outside pixel, even if the EllipseMorph3 class doesn't implement 
> #morphContainsPoint: or any other similar method. It also doesn't 
> include any method to tell the area it occupies on the Display, and 
> still updates and redraws work correctly. See what happens if you 
> change the code to make it bigger, for example, and the in an ispector 
> do 'self redrawNeeded', or just World / restore display. Check 
> EllipseMorph2 that includes stepping. In the class comment of one of 
> those there are several lines of code, that if evaluated together in a 
> Workspace, will stitch a few ellipses together and makes them step. 
> Try it!
>
> As usual, all this is experimental. It could break in unexpected ways, 
> etc.
>
> Feedback is most welcome.
>
> Cheeers,
> -- 
> Juan Vuletich
> www.cuis-smalltalk.org
> https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev
> https://github.com/jvuletich
> https://www.linkedin.com/in/juan-vuletich-75611b3
> @JuanVuletich

The attach includes additional changesets I wrote after those zip files. 
You can load them on top of those images. The change set numbers don't 
match, but don't worry. It is because I had to renumber all of them, to 
make room for recent updates.

Please try all this and give any feedback. I'd like to push this to the 
repo if no problems are found.

Thanks,

-- 
Juan Vuletich
www.cuis-smalltalk.org
https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev
https://github.com/jvuletich
https://www.linkedin.com/in/juan-vuletich-75611b3
@JuanVuletich

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