66
77DARKPINK = lv .color_hex (0xEC048C )
88
9- # doesnt work:
10- def draw_line (x ,y ):
11- global canvas
12- # Line drawing like this doesn't work:
13- layer = lv .layer_t ()
14- canvas .init_layer (layer )
15- dsc = lv .draw_line_dsc_t ()
16- dsc .color = DARKPINK
17- dsc .width = 4
18- dsc .round_end = 1
19- dsc .round_start = 1
20- dsc .p1 = lv .point_precise_t ()
21- dsc .p1 .x = x
22- dsc .p1 .y = y
23- dsc .p2 = lv .point_precise_t ()
24- dsc .p2 .x = 100
25- dsc .p2 .y = 200
26- #layer.draw_line(dsc) doesnt exist!
27- lv .draw_line (layer ,dsc )# doesnt do anything!
28- canvas .finish_layer (layer )
29-
30-
31-
32-
339class Draw (Activity ):
3410
3511hor_res = 0
3612ver_res = 0
13+ layer = None
3714
3815# Widgets:
3916canvas = None
@@ -51,44 +28,54 @@ def onCreate(self):
5128self .canvas .fill_bg (lv .color_white (),lv .OPA .COVER )
5229self .canvas .add_flag (lv .obj .FLAG .CLICKABLE )
5330self .canvas .add_event_cb (self .touch_cb ,lv .EVENT .ALL ,None )
31+ self .layer = lv .layer_t ()
32+ self .canvas .init_layer (self .layer )
5433self .setContentView (screen )
5534
5635def touch_cb (self ,event ):
5736event_code = event .get_code ()
58- # Ignore:
59- # =======
60- # 19: HIT_TEST
61- # COVER_CHECK
62- # DRAW_MAIN
63- # DRAW_MAIN_BEGIN
64- # DRAW_MAIN_END
65- # DRAW_POST
66- # DRAW_POST_BEGIN
67- # DRAW_POST_END
68- # GET_SELF_SIZE
6937if event_code not in 19 ,23 ,25 ,26 ,27 ,28 ,29 ,30 ,49 ]:
7038name = mpos .ui .get_event_name (event_code )
7139#print(f"lv_event_t: code={event_code}, name={name}") # target={event.get_target()}, user_data={event.get_user_data()}, param={event.get_param()}
7240if event_code == lv .EVENT .PRESSING :# this is probably enough
7341#if event_code in [lv.EVENT.PRESSED, lv.EVENT.PRESSING, lv.EVENT.LONG_PRESSED, lv.EVENT.LONG_PRESSED_REPEAT]:
7442x ,y = mpos .ui .get_pointer_xy ()
75- # drawing a point works:
76- #canvas.set_px(x,y,lv.color_black(),lv.OPA.COVER)
77- #
78- # drawing a square like this works:
79- #for dx in range(-5,5):
80- # for dy in range(-5,5):
81- # canvas.set_px(x+dx,y+dy,DARKPINK,lv.OPA.COVER)
82- #
83- # drawing a circle works:
84- radius = 7 # Set desired radius
85- if x == indev_error_x and y == indev_error_y :
86- radius = 25 # in case of indev error
87- square = radius * radius
88- for dx in range (- radius ,radius ):
89- for dy in range (- radius ,radius ):
90- if dx * dx + dy * dy <= square :
91- newx ,newy = x + dx ,y + dy
92- if 0 <= newx <= self .hor_res and 0 <= newy <= self .ver_res :# don't draw outside of canvas because that may crash
93- self .canvas .set_px (x + dx ,y + dy ,DARKPINK ,lv .OPA .COVER )
94-
43+ #canvas.set_px(x,y,lv.color_black(),lv.OPA.COVER) # draw a tiny point
44+ self .draw_rect (x ,y )
45+ #self.draw_line(x,y)
46+ return
47+
48+ def draw_line (self ,x ,y ):
49+ dsc = lv .draw_line_dsc_t ()
50+ lv .draw_line_dsc_t .init (dsc )
51+ dsc .color = DARKPINK
52+ dsc .width = 4
53+ dsc .round_end = 1
54+ dsc .round_start = 1
55+ dsc .p1 = lv .point_precise_t ()
56+ dsc .p1 .x = x
57+ dsc .p1 .y = y
58+ dsc .p2 = lv .point_precise_t ()
59+ dsc .p2 .x = 100
60+ dsc .p2 .y = 200
61+ lv .draw_line (self .layer ,dsc )
62+ self .canvas .finish_layer (self .layer )
63+
64+ @micropython .viper # make it with native compilation
65+ def draw_rect (self ,x :int ,y :int ):
66+ draw_dsc = lv .draw_rect_dsc_t ()
67+ lv .draw_rect_dsc_t .init (draw_dsc )
68+ draw_dsc .bg_color = lv .color_hex (0xffaaaa )
69+ draw_dsc .radius = lv .RADIUS_CIRCLE
70+ draw_dsc .border_color = lv .color_hex (0xff5555 )
71+ draw_dsc .border_width = 2
72+ draw_dsc .outline_color = lv .color_hex (0xff0000 )
73+ draw_dsc .outline_pad = 3
74+ draw_dsc .outline_width = 2
75+ a = lv .area_t ()
76+ a .x1 = x - 10
77+ a .y1 = y - 10
78+ a .x2 = x + 10
79+ a .y2 = y + 10
80+ lv .draw_rect (self .layer ,draw_dsc ,a )
81+ self .canvas .finish_layer (self .layer )