Re: [Pyobjc-dev] different behaviour for NSView.drawRect_

[Ronald O. <ron...@ma...>]

—

Twitter: @ronaldoussoren
Blog: https://blog.ronaldoussoren.net/

> On 2 Jan 2019, at 12:39, Frederik Berlaen <fre...@ty...> wrote:
> 
> Hi!
> 
> I noticed different behaviour of macOS calling my nsView subclass drawRect_ method, when I run a script  directly in terminal or from within my app: DrawBot (http://www.drawbot.com <http://www.drawbot.com/>)
> 
> The python version and installed packages are the same, the most current ones from pip.
> 
> The window is build with vanilla (a pythonic cocoa wrapper) https://github.com/typesupply/vanilla <https://github.com/typesupply/vanilla>
> 
> <viewIssue.py>
> 
> When this script is executed inside DrawBot: I get, based on my screen (retina or an old cinema HD), lots of drawRect_ callback with fixed width and height.
> 
> When executed in no-app world, terminal: I get a single callback on my drawRect_ with the size of the visible rect.
> 
> I fully understand the difference in performance and why this is happening.
> 
> 
> BUT:
> 
> Im unable to toggle between those two settings. I don't know what or where I have to change a setting to get a specific behaviour:  
> * tilled drawRect_ callbacks
> * a visible rect drawRect callback
> 
> 
> 
> please point me in the right direction
> 
> (If this question is posted in the wrong place, I happily repost it elsewhere)

This could be related to the SDK the main binary is linked to (the application stub from py2app vs. the python executable).  

P.S. This is just a quick reply, I haven’t tried to verify my hunch.

Ronald