uix:carousel introduce `load_slide` method to animate to the provided

slide

examples/widgets/carousel_buttons.py

@@ -17,6 +17,10 @@ Builder.load_string('''
     Button
     Button
     Button
+        text: 'load(page 3)'
+        on_release:
+            carousel = root.parent.parent
+            carousel.load_slide(carousel.slides[2])
     Button
     Button
         text: 'prev'

kivy/uix/carousel.py

@@ -234,6 +234,20 @@ class Carousel(StencilView):
                 self._position_visible_slides, -1)
         super(Carousel, self).__init__(**kwargs)
 
+    def load_slide(self, slide):
+        '''Animate to the slide that is passed as the argument.
+
+        .. versionchanged:: 1.8.0
+        '''
+        slides = self.slides
+        start, stop = slides.index(self.current_slide), slides.index(slide)
+        if stop > start:
+            self.index = stop - 1
+            self.load_next()
+        else:
+            self.index = stop + 1
+            self.load_previous()
+
     def load_previous(self):
         '''Animate to the previous slide.