Mercurial > libervia-desktop-kivy
comparison cagou/core/widgets_handler.py @ 271:23d4358803c7
widgets_handler: work around the double call of onSlideChange:
with Kivy dev version a95d67f (the one currently used in Python for Android), onSlideChange which is binded on current_slide was called twice with the same widget, resulting in widgets unexpectedly deleted.
This patch fixes it by abording the callback if new_slide is the same as _former_slide, i.e. if the widget is not actually changed.
Started a discussion with upstream Kivy team to check if this is a bug or feature.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Wed, 20 Mar 2019 09:29:44 +0100 |
| parents | a5dfc789eeaf |
| children | 1b835bcfa663 |
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| 270:89ba66464329 | 271:23d4358803c7 |
|---|---|
| 324 self._slides_update_lock = False | 324 self._slides_update_lock = False |
| 325 self.updateHiddenSlides() | 325 self.updateHiddenSlides() |
| 326 | 326 |
| 327 def onSlideChange(self, handler, new_slide): | 327 def onSlideChange(self, handler, new_slide): |
| 328 if self._former_slide is not None: | 328 if self._former_slide is not None: |
| 329 if self._former_slide is new_slide: | |
| 330 # FIXME: workaround for Kivy a95d67f (and above?), Carousel.current_slide | |
| 331 # binding now calls onSlideChange twice with the same widget (here | |
| 332 # "new_slide"). To be checked with Kivy team. | |
| 333 return | |
| 329 G.host._removeVisibleWidget(self._former_slide) | 334 G.host._removeVisibleWidget(self._former_slide) |
| 330 self._former_slide = new_slide | 335 self._former_slide = new_slide |
| 331 if new_slide is not None: | 336 if new_slide is not None: |
| 332 G.host._addVisibleWidget(new_slide) | 337 G.host._addVisibleWidget(new_slide) |
| 333 self.updateHiddenSlides() | 338 self.updateHiddenSlides() |