acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
lv_example_chart_4.py (2055B)
      1 def event_cb(e):
      2     code = e.get_code()
      3     chart = e.get_target()
      4 
      5     if code == lv.EVENT.VALUE_CHANGED:
      6         chart.invalidate()
      7 
      8     if code == lv.EVENT.REFR_EXT_DRAW_SIZE:
      9         e.set_ext_draw_size(20)
     10 
     11     elif code == lv.EVENT.DRAW_POST_END:
     12         id = lv.chart.get_pressed_point(chart)
     13         if id == lv.CHART_POINT.NONE:
     14             return
     15         # print("Selected point ", id)
     16         for i in range(len(series)):
     17             p = lv.point_t()
     18             chart.get_point_pos_by_id(series[i], id, p)
     19             value = series_points[i][id]
     20             buf = lv.SYMBOL.DUMMY + "$" + str(value)
     21 
     22             draw_rect_dsc = lv.draw_rect_dsc_t()
     23             draw_rect_dsc.init()
     24             draw_rect_dsc.bg_color = lv.color_black()
     25             draw_rect_dsc.bg_opa = lv.OPA._50
     26             draw_rect_dsc.radius = 3
     27             draw_rect_dsc.bg_img_src = buf
     28             draw_rect_dsc.bg_img_recolor = lv.color_white()
     29 
     30             a = lv.area_t()
     31             coords = lv.area_t()
     32             chart.get_coords(coords)
     33             a.x1 = coords.x1 + p.x - 20
     34             a.x2 = coords.x1 + p.x + 20
     35             a.y1 = coords.y1 + p.y - 30
     36             a.y2 = coords.y1 + p.y - 10
     37 
     38             clip_area = lv.area_t.__cast__(e.get_param())
     39             lv.draw_rect(a, clip_area, draw_rect_dsc)
     40 
     41     elif code == lv.EVENT.RELEASED:
     42         chart.invalidate()
     43 
     44 #
     45 # Add ticks and labels to the axis and demonstrate scrolling
     46 #
     47 
     48 # Create a chart
     49 chart = lv.chart(lv.scr_act())
     50 chart.set_size(200, 150)
     51 chart.center()
     52 
     53 chart.add_event_cb(event_cb, lv.EVENT.ALL, None)
     54 chart.refresh_ext_draw_size()
     55 
     56 # Zoom in a little in X
     57 chart.set_zoom_x(800)
     58 
     59 # Add two data series
     60 ser1 = chart.add_series(lv.palette_main(lv.PALETTE.RED), lv.chart.AXIS.PRIMARY_Y)
     61 ser2 = chart.add_series(lv.palette_main(lv.PALETTE.GREEN), lv.chart.AXIS.PRIMARY_Y)
     62 
     63 ser1_p = []
     64 ser2_p = []
     65 for i in range(10):
     66     ser1_p.append(lv.rand(60,90))
     67     ser2_p.append(lv.rand(10,40))
     68 ser1.y_points = ser1_p
     69 ser2.y_points = ser2_p
     70 
     71 series = [ser1,ser2]
     72 series_points=[ser1_p,ser2_p]
     73