Question

我正在编写一个python脚本作为创建转速计的概念证明。

我正在测试tkinter画一条线，其中针将在转速计上。但是，当我绘制时它不会立即显示，但我需要它。

此外，我相信我可能会失去理智，因为我无法在我的代码中找到中心线的位置，它位于我的TachoMeter类中，但我似乎无法找到它。

无论如何，这是代码：

import Tkinter as tk
import math
import time


class Point:
    def __init__(self,x=0,y=0):
        self.x = x
        self.y = y

class TachoMeter(tk.Tk):
    def __init__(self, CenterPoint = Point(), LeftPoint=Point(), Radius=0, LeftBuffer=0, BottomBuffer=0, MIN_RPM=0, MAX_RPM=0, canvas_height=0, canvas_width=0, *arg, **kwargs):
        tk.Tk.__init__(self, *arg, **kwargs)
        self.canvas = tk.Canvas(width=canvas_width, height=canvas_height)
        self.canvas.pack(fill="both", expand=True)
        self.CenterPoint = CenterPoint
        self.MAX_RPM = MAX_RPM
        self.MIN_RPM = MIN_RPM
        self.LeftBuffer = LeftBuffer
        self.BottomBuffer = BottomBuffer
        self.Radius = Radius
        self.Point_0 = LeftPoint
        self._create_arc((LeftPoint.x,LeftPoint.y), (LeftPoint.x + 2*Radius,LeftPoint.y))




    def _create_arc(self, p0, p1):
        extend_x = (self._distance(p0,p1) -(p1[0]-p0[0]))/2
        extend_y = (self._distance(p0,p1) -(p1[1]-p0[1]))/2
        startAngle = math.atan2(p0[0] - p1[0], p0[1] - p1[1]) *180 / math.pi
        self.canvas.create_arc(p0[0]-extend_x, p0[1]-extend_y , p1[0]+extend_x, p1[1]+extend_y, extent=180, start=90+startAngle)
        self.canvas.create_arc(LeftPoint.x+Radius,LeftPoint.y,LeftPoint.x+Radius,LeftPoint.y-Radius)

    def _distance(self, p0, p1):
        return math.sqrt((p0[0] - p1[0])**2 + (p0[1] - p1[1])**2)


def _rpmGauge():


                for x in range(180,0,-1):
                    curTheta = float((math.pi*x)/180)
                    #print(int(curTheta))
                    curX = TACH.CenterPoint.x +(TACH.Radius*math.cos(curTheta))
                    #print(int(curX))
                    curY = TACH.CenterPoint.y - (TACH.Radius*math.sin(curTheta))
                    #print(int(curY))
                    TACH.canvas.create_line(TACH.CenterPoint.x,TACH.CenterPoint.y,int(curX),int(curY))
                    TACH.canvas.pack()
                    time.sleep(0.025)






Radius = 400
acanvas_width = 500
acanvas_height = 600
LeftBuffer = 100
BottomBuffer = 100
CenterPoint = Point(LeftBuffer+Radius,acanvas_height - BottomBuffer)
LeftPoint = Point(LeftBuffer,acanvas_height-BottomBuffer)
MAX_RPM = 8000
MIN_RPM = 0


TACH = TachoMeter(CenterPoint,LeftPoint,Radius,LeftBuffer,BottomBuffer, MIN_RPM, MAX_RPM, acanvas_height, acanvas_width)

TACH.after(2000, _rpmGauge)
TACH.mainloop()

非常感谢任何帮助。我在Python方面仍然很陌生，但它将是一个有趣的项目。

谢谢，布雷特

Answer 1

我的解决方案：

long seconds = c.get(Calendar.SECOND);
TextView calenderTest = (TextView) findViewById(R.id.textView);
String myTime = (String) String.valueOf(seconds);
calenderTest.setText(myTime);

Python TachoMeter，如何在每个create_line之后显示

1 个答案: