initial commit

libraries/lvgl/examples/scroll/lv_example_scroll_4.py

@@ -0,0 +1,62 @@
+#
+# Styling the scrollbars
+#
+obj = lv.obj(lv.scr_act())
+obj.set_size(200, 100)
+obj.center()
+
+label = lv.label(obj)
+label.set_text(
+"""
+Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+Etiam dictum, tortor vestibulum lacinia laoreet, mi neque consectetur neque, vel mattis odio dolor egestas ligula.
+Sed vestibulum sapien nulla, id convallis ex porttitor nec.
+Duis et massa eu libero accumsan faucibus a in arcu.
+Ut pulvinar odio lorem, vel tempus turpis condimentum quis. Nam consectetur condimentum sem in auctor.
+Sed nisl augue, venenatis in blandit et, gravida ac tortor.
+Etiam dapibus elementum suscipit.
+Proin mollis sollicitudin convallis.
+Integer dapibus tempus arcu nec viverra.
+Donec molestie nulla enim, eu interdum velit placerat quis.
+Donec id efficitur risus, at molestie turpis.
+Suspendisse vestibulum consectetur nunc ut commodo.
+Fusce molestie rhoncus nisi sit amet tincidunt.
+Suspendisse a nunc ut magna ornare volutpat.
+""")
+
+
+# Remove the style of scrollbar to have clean start
+obj.remove_style(None, lv.PART.SCROLLBAR | lv.STATE.ANY)
+
+# Create a transition the animate the some properties on state change
+props = [lv.STYLE.BG_OPA, lv.STYLE.WIDTH, 0]
+trans = lv.style_transition_dsc_t()
+trans.init(props, lv.anim_t.path_linear, 200, 0, None)
+
+# Create a style for the scrollbars
+style = lv.style_t()
+style.init()
+style.set_width(4)               # Width of the scrollbar
+style.set_pad_right(5)           # Space from the parallel side
+style.set_pad_top(5)             # Space from the perpendicular side
+
+style.set_radius(2)
+style.set_bg_opa(lv.OPA._70)
+style.set_bg_color(lv.palette_main(lv.PALETTE.BLUE))
+style.set_border_color(lv.palette_darken(lv.PALETTE.BLUE, 3))
+style.set_border_width(2)
+style.set_shadow_width(8)
+style.set_shadow_spread(2)
+style.set_shadow_color(lv.palette_darken(lv.PALETTE.BLUE, 1))
+
+style.set_transition(trans)
+
+# Make the scrollbars wider and use 100% opacity when scrolled
+style_scrolled = lv.style_t()
+style_scrolled.init()
+style_scrolled.set_width(8)
+style_scrolled.set_bg_opa(lv.OPA.COVER)
+
+obj.add_style(style, lv.PART.SCROLLBAR)
+obj.add_style(style_scrolled, lv.PART.SCROLLBAR | lv.STATE.SCROLLED)
+