Image: control direction of animation (normal or reverse). Great to have open/close animation

image_hook.py

from functools import partial

def coreimage_animation(self, *largs):
    # accept reverse direction
    if not self._image:
        return
    textures = self.image.textures
    self._texture = self.image.textures[self._anim_index]
    self.dispatch('on_texture')
    self._anim_index += self._anim_direction
    if self._anim_index == len(self._image.textures) - 1:
        self.anim_reset(False)
    elif self._anim_index == 0:
        self.anim_reset(False)
    self._anim_index %= len(self._image.textures)


def patch_image(uix_image):
    coreimage = uix_image._coreimage
    coreimage._anim_direction = 1
    coreimage.anim_reset(False)
    coreimage._anim_old = coreimage._anim
    coreimage._anim = partial(coreimage_animation, coreimage)
    return uix_image
    
# Usage

_anim_help_fr = patch_image(Image(source="data/images/L3-aide-FR.zip", anim_delay=(1 / 30.)))

def show_help_br(self):
    self._anim_help_fr._coreimage._anim_direction = 1
    self._anim_help_fr._coreimage.anim_reset(True)

def hide_help_br(self):
    self._anim_help_fr._coreimage._anim_direction = -1
    self._anim_help_fr._coreimage.anim_reset(True)