当分辨率 > 时，Tkinter 缩放和浮动1 [英] Tkinter Scale and floats when resolution > 1

问题描述

当分辨率高于 1 时，如何从 Scale 获取浮点值?如果我将分辨率设置为低于 1，例如 0.9，Scale 将给出浮点数.高于 1，我只能得到整数.

How do I can get float values from Scale when the resolution is above 1? If I set the resolution below 1, for example 0.9, Scale will give floats. Above 1, and all I can get is integers.

示例代码:

from tkinter import *

root = Tk()

var = DoubleVar()
scale = Scale(root, variable=var, resolution=3.4)
scale.pack()

label = Label(root, textvariable=var)
label.pack()

root.mainloop()

我在 Windows 7 上使用 Python 3.4.1 64 位.

I'm using Python 3.4.1 64-bit on Windows 7.

推荐答案

Scale() 小部件 MVC 可视化部分的问题

DoubleVar() 不允许控制 Scale()(小数位深度)的 UI 呈现(Visual-part)，而 Model-part保持正确(虽然隐藏，但可能会通过 aScaleINSTANCE.get() 进行检查).

Troubles with the Scale() widget MVC Visual-part

DoubleVar() does not allow to control UI presentation ( Visual-part ) of the Scale() ( a depth of decimal places ), while a Model-part remains correct ( though hidden, might get inspected via aScaleINSTANCE.get() ).

from tkinter import *                     # python 3+

root = Tk()
varAsTxt = StringVar()                    # an MVC-trick an indirect value-holder
aScale = Scale( root,
                variable   = varAsTxt,    # MVC-Model-Part value holder
                from_      = -10.0,       # MVC-Model-Part value-min-limit
                to         =  10.0,       # MVC-Model-Part value-max-limit
                length     = 600,         # MVC-Visual-Part layout geometry [px]
                digits     =   4,         # MVC-Visual-Part presentation trick
                resolution =   0.23       # MVC-Controller-Part stepping
                )
aScale.pack()
root.lift()

这篇关于当分辨率 > 时，Tkinter 缩放和浮动1的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！