mirror of
https://github.com/lvgl/lvgl.git
synced 2025-01-14 06:42:58 +08:00
138 lines
4.2 KiB
Python
138 lines
4.2 KiB
Python
import urandom
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currentButton = None
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list1 = None
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def event_handler(e):
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global currentButton
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED:
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if currentButton == obj:
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currentButton = None
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else:
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currentButton = obj
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parent = obj.get_parent()
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for i in range( parent.get_child_cnt()):
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child = parent.get_child(i)
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if child == currentButton:
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child.add_state(lv.STATE.CHECKED)
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else:
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child.clear_state(lv.STATE.CHECKED)
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def event_handler_top(e):
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global currentButton
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED:
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if currentButton == None:
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return
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currentButton.move_background()
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currentButton.scroll_to_view( lv.ANIM.ON)
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def event_handler_up(e):
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global currentButton
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED or code == lv.EVENT.LONG_PRESSED_REPEAT:
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if currentButton == None:
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return
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index = currentButton.get_index()
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if index <= 0:
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return
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currentButton.move_to_index(index - 1)
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currentButton.scroll_to_view(lv.ANIM.ON)
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def event_handler_center(e):
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global currentButton
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED or code == lv.EVENT.LONG_PRESSED_REPEAT:
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if currentButton == None:
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return
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parent = currentButton.get_parent()
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pos = parent.get_child_cnt() // 2
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currentButton.move_to_index(pos)
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currentButton.scroll_to_view(lv.ANIM.ON)
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def event_handler_dn(e):
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global currentButton
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED or code == lv.EVENT.LONG_PRESSED_REPEAT:
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if currentButton == None:
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return
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index = currentButton.get_index()
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currentButton.move_to_index(index + 1)
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currentButton.scroll_to_view(lv.ANIM.ON)
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def event_handler_bottom(e):
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global currentButton
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED or code == lv.EVENT.LONG_PRESSED_REPEAT:
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if currentButton == None:
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return
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currentButton.move_foreground()
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currentButton.scroll_to_view(lv.ANIM.ON)
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def event_handler_swap(e):
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global currentButton
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global list1
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code = e.get_code()
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obj = e.get_target_obj()
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if code == lv.EVENT.CLICKED:
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cnt = list1.get_child_cnt()
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for i in range(100):
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if cnt > 1:
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obj = list1.get_child(urandom.getrandbits(32) % cnt )
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obj.move_to_index(urandom.getrandbits(32) % cnt)
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if currentButton != None:
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currentButton.scroll_to_view(lv.ANIM.ON)
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#Create a list with buttons that can be sorted
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list1 = lv.list(lv.scr_act())
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list1.set_size(lv.pct(60), lv.pct(100))
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list1.set_style_pad_row( 5, 0)
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for i in range(15):
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button = lv.button(list1)
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button.set_width(lv.pct(100))
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button.add_event( event_handler, lv.EVENT.CLICKED, None)
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lab = lv.label(button)
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lab.set_text("Item " + str(i))
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#Select the first button by default
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currentButton = list1.get_child(0)
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currentButton.add_state(lv.STATE.CHECKED)
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#Create a second list with up and down buttons
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list2 = lv.list(lv.scr_act())
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list2.set_size(lv.pct(40), lv.pct(100))
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list2.align(lv.ALIGN.TOP_RIGHT, 0, 0)
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list2.set_flex_flow(lv.FLEX_FLOW.COLUMN)
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button = list2.add_button(None, "Top")
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button.add_event(event_handler_top, lv.EVENT.ALL, None)
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lv.group_remove_obj(button)
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button = list2.add_button(lv.SYMBOL.UP, "Up")
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button.add_event(event_handler_up, lv.EVENT.ALL, None)
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lv.group_remove_obj(button)
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button = list2.add_button(lv.SYMBOL.LEFT, "Center")
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button.add_event(event_handler_center, lv.EVENT.ALL, None)
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lv.group_remove_obj(button)
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button = list2.add_button(lv.SYMBOL.DOWN, "Down")
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button.add_event(event_handler_dn, lv.EVENT.ALL, None)
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lv.group_remove_obj(button)
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button = list2.add_button(None, "Bottom")
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button.add_event(event_handler_bottom, lv.EVENT.ALL, None)
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lv.group_remove_obj(button)
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button = list2.add_button(lv.SYMBOL.SHUFFLE, "Shuffle")
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button.add_event(event_handler_swap, lv.EVENT.ALL, None)
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lv.group_remove_obj(button)
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