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53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
class LV_Example_Event_4:
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def __init__(self):
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#
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# Demonstrate the usage of draw event
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#
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self.size = 0
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self.size_dec = False
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self.cont = lv.obj(lv.scr_act())
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self.cont.set_size(200, 200)
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self.cont.center()
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self.cont.add_event_cb(self.event_cb, lv.EVENT.DRAW_PART_END, None)
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lv.timer_create(self.timer_cb, 30, None)
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def timer_cb(self,timer) :
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self.cont.invalidate()
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if self.size_dec :
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self.size -= 1
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else :
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self.size += 1
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if self.size == 50 :
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self.size_dec = True
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elif self.size == 0:
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self.size_dec = False
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def event_cb(self,e) :
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obj = e.get_target()
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dsc = e.get_draw_part_dsc()
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if dsc.class_p == lv.obj_class and dsc.part == lv.PART.MAIN :
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draw_dsc = lv.draw_rect_dsc_t()
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draw_dsc.init()
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draw_dsc.bg_color = lv.color_hex(0xffaaaa)
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draw_dsc.radius = lv.RADIUS_CIRCLE
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draw_dsc.border_color = lv.color_hex(0xff5555)
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draw_dsc.border_width = 2
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draw_dsc.outline_color = lv.color_hex(0xff0000)
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draw_dsc.outline_pad = 3
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draw_dsc.outline_width = 2
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a = lv.area_t()
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a.x1 = 0
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a.y1 = 0
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a.x2 = self.size
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a.y2 = self.size
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coords = lv.area_t()
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obj.get_coords(coords)
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coords.align(a, lv.ALIGN.CENTER, 0, 0)
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dsc.draw_ctx.rect(draw_dsc, a)
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lv_example_event_4 = LV_Example_Event_4()
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