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Draw app: make it faster

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This commit is contained in:
Thomas Farstrike
2025-11-05 13:42:48 +01:00
parent 83e71a7785
commit af91013f55
1 changed files with 42 additions and 55 deletions
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internal_filesystem/apps/com.micropythonos.draw/assets/draw.py
+42 -55
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@@ -6,34 +6,11 @@ indev_error_y = 120
DARKPINK = lv.color_hex(0xEC048C)
# doesnt work:
def draw_line(x, y):
global canvas
# Line drawing like this doesn't work:
layer = lv.layer_t()
canvas.init_layer(layer)
dsc = lv.draw_line_dsc_t()
dsc.color = DARKPINK
dsc.width = 4
dsc.round_end = 1
dsc.round_start = 1
dsc.p1 = lv.point_precise_t()
dsc.p1.x = x
dsc.p1.y = y
dsc.p2 = lv.point_precise_t()
dsc.p2.x = 100
dsc.p2.y = 200
#layer.draw_line(dsc) doesnt exist!
lv.draw_line(layer,dsc) # doesnt do anything!
canvas.finish_layer(layer)
class Draw(Activity):
hor_res = 0
ver_res = 0
layer = None
# Widgets:
canvas = None
@@ -51,44 +28,54 @@ class Draw(Activity):
self.canvas.fill_bg(lv.color_white(), lv.OPA.COVER)
self.canvas.add_flag(lv.obj.FLAG.CLICKABLE)
self.canvas.add_event_cb(self.touch_cb, lv.EVENT.ALL, None)
self.layer = lv.layer_t()
self.canvas.init_layer(self.layer)
self.setContentView(screen)
def touch_cb(self, event):
event_code=event.get_code()
# Ignore:
# =======
# 19: HIT_TEST
# COVER_CHECK
# DRAW_MAIN
# DRAW_MAIN_BEGIN
# DRAW_MAIN_END
# DRAW_POST
# DRAW_POST_BEGIN
# DRAW_POST_END
# GET_SELF_SIZE
if event_code not in [19,23,25,26,27,28,29,30,49]:
name = mpos.ui.get_event_name(event_code)
#print(f"lv_event_t: code={event_code}, name={name}") # target={event.get_target()}, user_data={event.get_user_data()}, param={event.get_param()}
if event_code == lv.EVENT.PRESSING: # this is probably enough
#if event_code in [lv.EVENT.PRESSED, lv.EVENT.PRESSING, lv.EVENT.LONG_PRESSED, lv.EVENT.LONG_PRESSED_REPEAT]:
x, y = mpos.ui.get_pointer_xy()
# drawing a point works:
#canvas.set_px(x,y,lv.color_black(),lv.OPA.COVER)
#
# drawing a square like this works:
#for dx in range(-5,5):
# for dy in range(-5,5):
# canvas.set_px(x+dx,y+dy,DARKPINK,lv.OPA.COVER)
#
# drawing a circle works:
radius = 7 # Set desired radius
if x == indev_error_x and y == indev_error_y:
radius = 25 # in case of indev error
square = radius * radius
for dx in range(-radius, radius):
for dy in range(-radius, radius):
if dx * dx + dy * dy <= square:
newx, newy = x + dx, y + dy
if 0 <= newx <= self.hor_res and 0 <= newy <= self.ver_res: # don't draw outside of canvas because that may crash
self.canvas.set_px(x + dx, y + dy, DARKPINK, lv.OPA.COVER)
#canvas.set_px(x,y,lv.color_black(),lv.OPA.COVER) # draw a tiny point
self.draw_rect(x,y)
#self.draw_line(x,y)
return
def draw_line(self, x, y):
dsc = lv.draw_line_dsc_t()
lv.draw_line_dsc_t.init(dsc)
dsc.color = DARKPINK
dsc.width = 4
dsc.round_end = 1
dsc.round_start = 1
dsc.p1 = lv.point_precise_t()
dsc.p1.x = x
dsc.p1.y = y
dsc.p2 = lv.point_precise_t()
dsc.p2.x = 100
dsc.p2.y = 200
lv.draw_line(self.layer,dsc)
self.canvas.finish_layer(self.layer)
@micropython.viper # make it with native compilation
def draw_rect(self, x: int, y: int):
draw_dsc = lv.draw_rect_dsc_t()
lv.draw_rect_dsc_t.init(draw_dsc)
draw_dsc.bg_color = lv.color_hex(0xffaaaa)
draw_dsc.radius = lv.RADIUS_CIRCLE
draw_dsc.border_color = lv.color_hex(0xff5555)
draw_dsc.border_width = 2
draw_dsc.outline_color = lv.color_hex(0xff0000)
draw_dsc.outline_pad = 3
draw_dsc.outline_width = 2
a = lv.area_t()
a.x1 = x-10
a.y1 = y-10
a.x2 = x+10
a.y2 = y+10
lv.draw_rect(self.layer, draw_dsc, a)
self.canvas.finish_layer(self.layer)