#!/usr/bin/env python
class ExampleChart_6():

		def __init__(self):
		self.last_id = -1
#
# Show cursor on the clicked point
#

					   chart = lv.chart(lv.scr_act())
							   chart.set_size(200, 150)
							   chart.align(lv.ALIGN.CENTER, 0, -10)

							   chart.set_axis_tick(lv.chart.AXIS.PRIMARY_Y, 10, 5, 6, 5, True, 40)
							   chart.set_axis_tick(lv.chart.AXIS.PRIMARY_X, 10, 5, 10, 1, True, 30)

							   chart.add_event_cb(self.event_cb, lv.EVENT.ALL, None)
							   chart.refresh_ext_draw_size()

							   self.cursor = chart.add_cursor(lv.palette_main(lv.PALETTE.BLUE), lv.DIR.LEFT | lv.DIR.BOTTOM)

											 self.ser = chart.add_series(lv.palette_main(lv.PALETTE.RED), lv.chart.AXIS.PRIMARY_Y)

													 self.ser_p = []
															 for i in range(10) :
																 self.ser_p.append(lv.rand(10, 90))
																 self.ser.y_points = self.ser_p

																		 newser = chart.get_series_next(None)
# print("length of data points: ",len(newser.points))
																				 chart.set_zoom_x(500)

																				 label = lv.label(lv.scr_act())
																						 label.set_text("Click on a point")
																						 label.align_to(chart, lv.ALIGN.OUT_TOP_MID, 0, -5)


																						 def event_cb(self, e) :

																						 code = e.get_code()
																								 chart = e.get_target()

																										 if code == lv.EVENT.VALUE_CHANGED:
# print("last_id: ",self.last_id)
																										 self.last_id = chart.get_pressed_point()
																													 if self.last_id != lv.CHART_POINT.NONE:
																													 p = lv.point_t()
																																 chart.get_point_pos_by_id(self.ser, self.last_id, p)
																																 chart.set_cursor_point(self.cursor, None, self.last_id)

																																 elif code == lv.EVENT.DRAW_PART_END:
# print("EVENT.DRAW_PART_END")
																																 dsc = lv.obj_draw_part_dsc_t.__cast__(e.get_param())
# if dsc.p1 and dsc.p2:
# print("p1, p2", dsc.p1,dsc.p2)
# print("p1.y, p2.y", dsc.p1.y, dsc.p2.y)
# print("last_id: ",self.last_id)
																																		 if dsc.part == lv.PART.CURSOR and dsc.p1 and dsc.p2 and dsc.p1.y == dsc.p2.y and self.last_id >= 0:

																																		 v = self.ser_p[self.last_id]

# print("value: ",v)
																																					 value_txt = str(v)
																																							 size = lv.point_t()
																																									 lv.txt_get_size(size, value_txt, lv.font_default(), 0, 0, lv.COORD.MAX, lv.TEXT_FLAG.NONE)

																																									 a = lv.area_t()
																																											 a.y2 = dsc.p1.y - 5
																																													 a.y1 = a.y2 - size.y - 10
																																															 a.x1 = dsc.p1.x + 10
																																																	 a.x2 = a.x1 + size.x + 10

																																																			 draw_rect_dsc = lv.draw_rect_dsc_t()
																																																					 draw_rect_dsc.init()
																																																					 draw_rect_dsc.bg_color = lv.palette_main(lv.PALETTE.BLUE)
																																																							 draw_rect_dsc.radius = 3

																																																									 lv.draw_rect(a, dsc.clip_area, draw_rect_dsc)

																																																									 draw_label_dsc = lv.draw_label_dsc_t()
																																																											 draw_label_dsc.init()
																																																											 draw_label_dsc.color = lv.color_white()
																																																													 a.x1 += 5
																																																															 a.x2 -= 5
																																																																	 a.y1 += 5
																																																																			 a.y2 -= 5
																																																																					 lv.draw_label(a, dsc.clip_area, draw_label_dsc, value_txt, None)

																																																																					 example_chart_6 = ExampleChart_6()
