我试图找出原因,但可能不知道正确的问题。我有一个项目,我正在尝试创建一个仪表板我的车。问题是,当我试图使另一个类中的canvas对象出现时,我的GUI启动,但没有显示任何内容。如果我启动GUI而不要求画布出现,GUI就会工作并显示屏幕。我对Python还不熟悉。我的版本是3.5
我的主程序:
from tkinter import*
from helperThingys import Helpers
root = Tk()
root.geometry("800x480")
bgLeft = Frame(root, bg="black", width=200, height=480)
bgLeft.pack_configure(fill=BOTH, expand=1, side=LEFT)
bgMiddle = Frame(root, bg="black", width=400, height=480)
bgMiddle.pack_configure(fill=BOTH, expand=1, side=LEFT)
bgRight = Frame(root, bg="black", width=200, height=480)
bgRight.pack_configure(fill=BOTH, expand=1, side=LEFT)
# These are really gif images read to labels to be able to grid them
# now just plain text labels for convenience.
label_4hi = Label(bgLeft, text="ok", bg="green")
label_4lo = Label(bgLeft, text="ok", bg="green")
label_lock = Label(bgLeft, text="ok", bg="green")
label_batt = Label(bgMiddle, text="ok", bg="red")
label_fuelF = Label(bgLeft, text="ok", bg="orange")
label_glow = Label(bgLeft, text="ok", bg="yellow")
label_hb = Label(bgMiddle, text="ok", bg="blue")
label_indL = Label(bgMiddle, text="ok", bg="green")
label_indR = Label(bgMiddle, text="ok", bg="green")
label_lowFuel = Label(bgLeft, text="ok", bg="red")
label_lowOil = Label(bgLeft, text="ok", bg="red")
label_park = Label(bgMiddle, text="ok", bg="red")
label_pwrS = Label(bgLeft, text="ok", bg="red")
label_rFog = Label(bgLeft, text="ok", bg="orange")
label_temp = Label(bgLeft, text="ok", bg="red")
label_gauge = Label(bgMiddle, text="ok", bg="red")
# Middle frame
bgMiddle.rowconfigure(0, minsize=46, weight=1)
bgMiddle.rowconfigure(1, minsize=217, weight=5)
bgMiddle.rowconfigure(2, minsize=217, weight=5)
bgMiddle.columnconfigure(0, minsize=80)
bgMiddle.columnconfigure(1, minsize=80)
bgMiddle.columnconfigure(2, minsize=80)
bgMiddle.columnconfigure(3, minsize=80)
bgMiddle.columnconfigure(4, minsize=80)
label_indL.grid(row=0, column=0, sticky=E+N+W)
label_hb.grid(row=0, column=1, sticky=E+N+S+W)
label_park.grid(row=0, column=2, sticky=E+N+S+W)
label_batt.grid(row=0, column=3, sticky=E+N+S+W)
label_indR.grid(row=0, column=4, sticky=E+N+S+W)
# Left frame
bgLeft.rowconfigure(0, minsize=46, weight=1)
bgLeft.rowconfigure(1, minsize=46, weight=1)
bgLeft.rowconfigure(2, minsize=46, weight=1)
bgLeft.rowconfigure(3, minsize=46, weight=1)
bgLeft.rowconfigure(4, minsize=46, weight=1)
bgLeft.columnconfigure(0, minsize=100)
bgLeft.columnconfigure(1, minsize=100)
label_4hi.grid(row=0, column=0, sticky=E+N+S+W)
label_4lo.grid(row=0, column=1, sticky=E+N+S+W)
label_lock.grid(row=1, column=0, sticky=E+N+S+W)
label_pwrS.grid(row=1, column=1, sticky=E+N+S+W)
label_rFog.grid(row=2, column=0, sticky=E+N+S+W)
label_lowFuel.grid(row=2, column=1, sticky=E+N+S+W)
label_lowOil.grid(row=3, column=0, sticky=E+N+S+W)
label_temp.grid(row=3, column=1, sticky=E+N+S+W)
label_fuelF.grid(row=4, column=0, sticky=E+N+S+W)
label_glow.grid(row=4, column=1, sticky=E+N+S+W)
# Middle frame
speedo = helpers.Gauge()
speedo.makeGauge(bgMiddle, 150, "speed")
speedo.grid(row=1, columnspan=5, sticky=E+N+S+W)
#label_gauge.grid(row=1, columnspan=5, sticky=E+N+S+W)
# Right Frame
#oilPres = Gauge(bgRight, 150, "oilPres")
root.mainloop()
这里是助手.py'来自HelperThingy的包。你知道吗
from tkinter import Canvas
class Gauge(Canvas):
def __init__(self):
Canvas.__init__(self)
pass
def makeGauge(self, window, value, gaugeType):
if gaugeType == "speed":
baseCanvas = Canvas(window, bg="black", width=400, height=217,
highlightthickness=0)
baseCanvas.create_arc([10, 5, 390, 395], start=0, extent=180,
fill="white")
return baseCanvas
我用画布作为测量仪的背景。奇怪的是这是助手.py'在我的GUI不是类而是模块时工作并创建画布:
def makeGauge(self, window, value, gaugeType):
if gaugeType == "speed":
baseCanvas = Canvas(window, bg="black", width=400, height=217,
highlightthickness=0)
baseCanvas.create_arc([10, 5, 390, 395], start=0, extent=180,
fill="white")
return baseCanvas
。。。以此类推(然后模块与GUI在同一个包中)。这就是为什么我知道画布和GUI一起工作。当我在课堂上使用它们时,我做错了什么?你知道吗
谢谢你的回答。你知道吗
您的问题是
Gauge
两者都是Canvas
的子类,创建了一个或多个其他画布(奇怪的是,它们是其他窗口的子类)。你知道吗当您调用
makeGauge
时,这将创建第二个画布并返回它。但是,您不保存引用,并且从不在第二个画布上调用pack
、place
或grid
,因此它永远不会出现。你知道吗我不知道你打算怎么处理这两幅油画,但我猜你真的只想要一幅。我建议这样创建类,在创建画布时传入所有参数,这样就可以在一个步骤中创建量表:
如果要保留这两个画布,或者决定使
Gauge
从其他对象继承,则需要保存makeGauge
返回的引用,然后将其添加到显示:相关问题 更多 >
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