如何使WPF滑块后续光标从任意点 [英] How to make WPF Slider Thumb follow cursor from any point

问题描述

我有这样的滑块：

<Slider Minimum="0" Maximum="100" 
TickFrequency="1"
IsMoveToPointEnabled="True"
IsSnapToTickEnabled="False"/>

我要让下一个行为：
时的MouseDown发生在滑块的任何一点，拇指不仅移动一次到这一点，也是继光标直至发生的MouseUp

I want to make next behavior: when MouseDown occured at any point of slider, Thumb not only moves once to that point, but also following cursor until MouseUp occurs.

很抱歉，如果有人问了，我找不到这个问题。

Sorry if it was asked already, i couldn't find that question.

推荐答案

此行为会发生的仅当你拖动滑块本身，它是由设计。

This behavior will happen only when you drag the slider thumb itself, it is by design.

的然而的，这里的一些代码，将做到这一点; - ）

However, here's some code that will do it ;-)

勾MouseMove事件在XAML：

Hook to the MouseMove event in XAML:

<Slider MouseMove="Slider_OnMouseMove" IsMoveToPointEnabled="True"/>

然后插入代码：

Then insert this code:

private void Slider_OnMouseMove(object sender, MouseEventArgs e)
{
    if (e.LeftButton == MouseButtonState.Pressed)
    {
        var slider = (Slider)sender;
        Point position = e.GetPosition(slider);
        double d = 1.0d / slider.ActualWidth * position.X;
        var p = slider.Maximum * d;
        slider.Value = p;
    }
}

请注意：

• 您可能有他们应该有所不同把你的滑块的边距和填充进去，我没有。


• 这样做对一个水平滑块。
我的滑块

• 最小值为0，一定要调整计算应您的最低是否定的。


• 最后，它似乎只有当IsMoveToPointEnabled设置工作。

• You might have to take margins and padding of your slider into account should they differ, I haven't.
• This was done on an horizontal slider.
• Minimum value of my slider was 0, make sure to adjust the calculation should your minimum be negative.
• Finally, it does seem to work only when IsMoveToPointEnabled is set.

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