Window.mouse_pos incorrect on 4k/retina displays

The default Kivy window size is 800x600. However, when running on a high rez display (4k display, MacBookPro Retina Display), the default window size ends up 1600x1200. Fair enough. But, when querying Window.mouse_pos, the returned value appears as if the window size were 800x600.

For example, this:

   def on_touch_down(self, touch):
      print touch.pos
      print Window.mouse_pos, '\n'

will print out:

(1438.0, 1068.0)
(719.0, 534.0) 

[hackalog]

This was likely fixed as part of #4403

Just tested on ios with

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.label import Label
from kivy.core.window import Window

class TestLabel(Label):
    def on_touch_down(self, touch):
        self.touch_pos = touch.pos
        self.mouse_pos = Window.mouse_pos

kv = Builder.load_string("""
TestLabel:
    touch_pos: 0,0
    mouse_pos: 0,0
    text: '{} vs {}'.format(self.touch_pos, self.mouse_pos)
""")

class MousePosApp(App):
    def build(self):
        return kv

MousePosApp().run()

and it appears to work as expected

[eranegozy]

I can also confirm that this has been fixed. Thanks

-Eran (iPhone)

On Oct 7, 2017, at 2:26 PM, Peter Badida [e-mail] wrote:

I’ll look into adding a unittest later. (Note to myself:) It might be enough to just run Kivy with density env var and compare the values, something like this:

os.environ[<density var>] = <value> # setUp (maybe class one) <touch down> self.assertEqual(touch.pos, <calculated pos from 3925930 or more up-to-date change>) os.environ.pop(<density var>) # tearDown — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.