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84 lines
3.0 KiB
Python
84 lines
3.0 KiB
Python
import time
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class LV_Example_Checkbox_2:
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def __init__(self):
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#
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# Checkboxes as radio buttons
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#
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# The idea is to enable `LV_OBJ_FLAG_EVENT_BUBBLE` on checkboxes and process the
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#`LV.EVENT.CLICKED` on the container.
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# Since user_data cannot be used to pass parameters in MicroPython I use an instance variable to
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# keep the index of the active button
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self.active_index_1 = 0
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self.active_index_2 = 0
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self.style_radio = lv.style_t()
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self.style_radio.init()
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self.style_radio.set_radius(lv.RADIUS_CIRCLE)
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self.style_radio_chk = lv.style_t()
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self.style_radio_chk.init()
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self.style_radio_chk.init()
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self.style_radio_chk.set_bg_img_src(None)
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self.cont1 = lv.obj(lv.scr_act())
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self.cont1.set_flex_flow(lv.FLEX_FLOW.COLUMN)
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self.cont1.set_size(lv.pct(40), lv.pct(80))
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self.cont1.add_event(self.radio_event_handler, lv.EVENT.CLICKED, None)
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for i in range(5):
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txt = "A {:d}".format(i+1)
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self.radiobutton_create(self.cont1,txt)
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# Make the first checkbox checked
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#lv_obj_add_state(lv_obj_get_child(self.cont1, 0), LV_STATE_CHECKED);
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self.cont1.get_child(0).add_state(lv.STATE.CHECKED)
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self.cont2 = lv.obj(lv.scr_act())
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self.cont2.set_flex_flow(lv.FLEX_FLOW.COLUMN)
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self.cont2.set_size(lv.pct(40), lv.pct(80))
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self.cont2.set_x(lv.pct(50))
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self.cont2.add_event(self.radio_event_handler, lv.EVENT.CLICKED, None)
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for i in range(3):
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txt = "B {:d}".format(i+1)
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self.radiobutton_create(self.cont2,txt)
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# Make the first checkbox checked*/
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self.cont2.get_child(0).add_state(lv.STATE.CHECKED)
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def radio_event_handler(self,e):
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cont = e.get_current_target_obj()
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act_cb = e.get_target_obj()
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if cont == self.cont1:
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active_id = self.active_index_1
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else:
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active_id = self.active_index_2
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old_cb = cont.get_child(active_id)
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# Do nothing if the container was clicked
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if act_cb == cont:
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return
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old_cb.clear_state(lv.STATE.CHECKED) # Uncheck the previous radio button
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act_cb.add_state(lv.STATE.CHECKED) # Uncheck the current radio button
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if cont == self.cont1:
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self.active_index_1 = act_cb.get_index()
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# print("active index 1: ", self.active_index_1)
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else:
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self.active_index_2 = act_cb.get_index()
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# print("active index 2: ", self.active_index_2)
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print("Selected radio buttons: {:d}, {:d}".format(self.active_index_1, self.active_index_2))
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def radiobutton_create(self,parent, txt):
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obj = lv.checkbox(parent)
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obj.set_text(txt)
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obj.add_flag(lv.obj.FLAG.EVENT_BUBBLE)
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obj.add_style(self.style_radio, lv.PART.INDICATOR)
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obj.add_style(self.style_radio_chk, lv.PART.INDICATOR | lv.STATE.CHECKED)
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lv_example_checkbox_2 = LV_Example_Checkbox_2()
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