更改内容时，阻止“文本"小部件滚动 [英] Stop Text widget from scrolling when content is changed

问题描述

我有一个带有滚动条的文本小部件，看起来像这样:

I have a text widget with a scrollbar which looks something like this:

self.myWidget = Text(root) 
self.myWidget.configure(state=DISABLED)
self.myWidget.pack()

self.myWidgetScrollbar = Scrollbar(root, command=self.myWidget.yview)
self.myWidget.configure(yscrollcommand=self.myWidgetScrollbar.set)
self.myWidgetScrollbar.pack(side=LEFT,fill=Y)

文本小部件每秒更新4次，如下:

The text widget is updated 4 times per second with:

self.myWidget.configure(state=NORMAL)
self.myWidget.delete(1.0, END) 
self.myWidget.insert(END, "\n".join(self.listWithStuff))  
self.myWidget.configure(state=DISABLED)

问题在于，当我尝试滚动时，它会一直将我滚动回到顶部(可能每秒滚动4次).我认为这是因为所有内容都已删除.

The problem is that when I try to scroll, it keeps scrolling me back up to the top (4 times per second, probably). I assume this is because all content is removed.

如何防止它自动滚动，或者在内容更改后可能会向后滚动?

How can I prevent it from scrolling automatically, or possibly scroll "back" when the content has changed?

推荐答案

您可以保护位置并在更新后将其重新设置，例如Tcl代码:

You can safe the position and set it back after an update, like this Tcl code does:

proc update_view {w s data} {
  # store position
  set pos [$s get]
  $w configure -state normal -yscrollcommand {}
  $w delete 1.0 end
  $w insert end $data
  $w configure -state disabled -yscrollcommand [list $s set]
  $s get
  $s set {*}$pos
}

Tkinter代码看起来类似，类似于:

The Tkinter code would look similar, something like:

def update_view(self, data):
    pos = self.myWidgetScrollbar.get()
    self.myWidget.configure(yscrollcommand=None, state=NORMAL)
    self.myWidget.delete(1.0, END)
    self.myWidget.insert(END, data)
    self.myWidget.configure(yscrollcommand=self.myWidgetScrollbar.set, state=DISABLED)
    self.myWidgetScrollbar.get()
    self.myWidgetScrollbar.set(pos)

不确定为什么需要介于两者之间的get()，也许可以强制进行一些查找，但是仍然可以.

Not sure why the get() in between is needed, maybe to force some lookup, but it works.

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