104 lines
2.8 KiB
Python
104 lines
2.8 KiB
Python
import cairo
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import math
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from .page import Page
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class Rudder(Page):
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def __init__(self, pageno, cfg, appdata, boatdata):
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super().__init__(pageno, cfg, appdata, boatdata)
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self.buttonlabel[1] = 'MODE'
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self.mode = 'P'
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# Werte für Ruderausschlag
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self.valpri = self.bd.getRef("RPOS") # Primäres Ruder
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self.valsec = self.bd.getRef("PRPOS") # Sekundäres Ruder
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def handle_key(self, buttonid):
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if buttonid == 1:
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if self.mode == 'P':
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self.mode = 'S'
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else:
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self.mode = 'P'
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return True
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return False
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def draw(self, ctx):
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# Ruder auswählen
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if self.mode == 'P':
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valref = self.valpri
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else:
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valref = self.valsec
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# Rotationszentrum
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cx = 200
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cy = 150
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# Radius des Instruments
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r = 110
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# Titel
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ctx.select_font_face("Ubuntu", cairo.FontSlant.NORMAL, cairo.FontWeight.BOLD)
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ctx.set_font_size(32)
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ctx.move_to(80, 70)
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ctx.show_text("Rudder Position")
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ctx.set_font_size(24)
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if valref.valid:
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ctx.move_to(175, 110)
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ctx.show_text(valref.unit)
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else:
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ctx.move_to(110, 110)
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ctx.show_text("no data available")
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ctx.stroke()
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# Debug
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angle = 5
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# Rahmen
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ctx.set_source_rgb(*self.fgcolor)
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ctx.set_line_width(3)
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ctx.arc(cx, cy, r + 10, 0, math.pi)
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ctx.stroke()
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# Zentrum
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ctx.arc(cx, cy, 8, 0, 2*math.pi)
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ctx.fill()
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# Skala mit Strichen, Punkten und Beschriftung
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char = {
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90: "45",
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120: "30",
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150: "15",
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180: "0",
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210: "15",
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240: "30",
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270: "45"
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}
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# Zeichnen in 10°-Schritten
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ctx.set_font_size(16)
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for i in range(90, 271, 10):
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fx = math.sin(i / 180 * math.pi)
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fy = math.cos(i / 180 * math.pi)
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if i in char:
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x = cx + (r - 30) * fx
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y = cy - (r - 30) * fy
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self.draw_text_center(ctx, x, y, char[i])
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ctx.stroke()
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if i % 30 == 0:
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ctx.move_to(cx + (r - 10) * fx, cy - (r - 10) * fy)
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ctx.line_to(cx + (r + 10) * fx, cy - (r + 10) * fy)
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ctx.stroke()
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else:
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x = cx + r * fx
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y = cy - r * fy
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ctx.arc(x, y, 2, 0, 2*math.pi)
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ctx.fill()
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if valref.valid:
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p = ((cx - 6, cy), (cx + 6, cy), (cx + 2, cy + r - 50), (cx - 2, cy + r - 50))
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rudder = self.rotate((cx, cy), p, angle)
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ctx.move_to(*rudder[0])
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for point in rudder[1:]:
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ctx.line_to(*point)
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ctx.fill()
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