Python Tkinter canvas.xview 单元 [英] Python Tkinter canvas.xview units

问题描述

Tkinter 画布滚动方法 xview(SCROLL, step, what) 和 yview(SCROLL, step,什么) 定义?它是以像素为单位定义的吗?是否可以更改它(例如，滚动速度较慢)?

How are the 'units' (what) from the Tkinter canvas scrolling methods xview(SCROLL, step, what) and yview(SCROLL, step, what) defined? Is it defined in pixels? Is it possible to change it (for a slower scrolling for example)?

有关更好的上下文，请参阅此处的代码.

For a better context please see the code here.

提前致谢.

推荐答案

对于较慢的滚动，您可以使用 xscrollincrement &Canvas 的 yscrollincrement 选项:

for slower scrolling, you can play around with the xscrollincrement & yscrollincrement options of the Canvas:

from Tkinter import *

root = Tk()
c = Canvas(root, scrollregion=(0,0,500,500), height=200, width=200)
s = Scrollbar(root, command=c.yview)
c.pack(side=LEFT)
s.pack(side=RIGHT, fill=Y)
c.configure(yscrollcommand=s.set)


c.configure(yscrollincrement='2')
##yscrollincrement - increment for vertical scrolling, in pixels,
##millimeters '2m', centimeters '2c', or inches '2i'

c.create_rectangle(10,10,100,100)
c.create_rectangle(10,200,100,300)

def rollWheel(event):
    direction = 0
    if event.num == 5 or event.delta == -120:
     direction = 1
    if event.num == 4 or event.delta == 120:
     direction = -1
    event.widget.yview_scroll(direction, UNITS)

c.bind('<MouseWheel>', lambda event: rollWheel(event))
c.bind('<Button-4>', lambda event: rollWheel(event))
c.bind('<Button-5>', lambda event: rollWheel(event))

c.focus_set()

root.mainloop()

这篇关于Python Tkinter canvas.xview 单元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！