触发ScrollViewer的滚动条可见性（WPF） [英] Triggering on a ScrollViewer's scroll bar visibility (WPF)

问题描述

是否可以创建基于 ScrollViewer 滚动条可见性触发的触发器？我有一个 ScrollViewer ，其 VerticalScrollBarVisibility 设置为 Auto ，我只想在滚动条实际可见时才更改某些 ScrollViewer 的属性。

类似

 < ScrollViewer VerticalScrollBarVisibility = Auto> 
< ScrollViewer.Triggers> 
< Trigger Property = IsScrollBarVisible Value = True> 
<！-设置器-> 
< / Trigger> 
< /ScrollViewer.Triggers> 
< / ScrollViewer> 
  

解决方案

在 ComputedVerticalScrollBarVisibility 。 / p>

Is it possible to create a Trigger that is triggered based on a ScrollViewer's scroll bar visibility? I have a ScrollViewer with its VerticalScrollBarVisibility set to Auto and I want to change some of the ScrollViewer's properties only when the scroll bar is actually visible.

Something like this:

<ScrollViewer VerticalScrollBarVisibility="Auto">
    <ScrollViewer.Triggers>
        <Trigger Property="IsScrollBarVisible" Value="True">
            <!-- Setters -->
        </Trigger>
    </ScrollViewer.Triggers>
</ScrollViewer>

解决方案

Trigger on ComputedVerticalScrollBarVisibility.

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