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- def sw_event_cb(e,panel):
- code = e.get_code()
- sw = e.get_target()
- if code == lv.EVENT.VALUE_CHANGED:
- if sw.has_state(lv.STATE.CHECKED):
- panel.add_flag(lv.obj.FLAG.SCROLL_ONE)
- else:
- panel.clear_flag(lv.obj.FLAG.SCROLL_ONE)
- #
- # Show an example to scroll snap
- #
- panel = lv.obj(lv.scr_act())
- panel.set_size(280, 150)
- panel.set_scroll_snap_x(lv.SCROLL_SNAP.CENTER)
- panel.set_flex_flow(lv.FLEX_FLOW.ROW)
- panel.center()
- for i in range(10):
- btn = lv.btn(panel)
- btn.set_size(150, 100)
- label = lv.label(btn)
- if i == 3:
- label.set_text("Panel {:d}\nno snap".format(i))
- btn.clear_flag(lv.obj.FLAG.SNAPPABLE)
- else:
- label.set_text("Panel {:d}".format(i))
- label.center()
- panel.update_snap(lv.ANIM.ON)
- # Switch between "One scroll" and "Normal scroll" mode
- sw = lv.switch(lv.scr_act())
- sw.align(lv.ALIGN.TOP_RIGHT, -20, 10)
- sw.add_event_cb(lambda evt: sw_event_cb(evt,panel), lv.EVENT.ALL, None)
- label = lv.label(lv.scr_act())
- label.set_text("One scroll")
- label.align_to(sw, lv.ALIGN.OUT_BOTTOM_MID, 0, 5)
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