c# - WPF 将 slider 的鼠标位置值绑定(bind)到文本 block

Question

我有一个 slider ，最小值为 0，最大值为 100。

当我将鼠标悬停在 slider 上时，我会看到一个弹出窗口。
目前，我将弹出窗口与 slider 值绑定(bind)。

我想要的是:
当我将鼠标移到 slider 上时，我想查看假定位于该位置的值。

例如:

我的 XAML:

<Window x:Class="WPFMavka.VideoPlayer"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WPFMavka"
        Title="MainWindow" WindowStyle="None" Width="1920" Height="1080" WindowState="Maximized" KeyboardNavigation.TabNavigation="None" Closing="Window_Closing">
    <Grid Name="tst">
        <local:MetroSlider x:Name="bla" MouseMove="Rectangle_MouseMove" MouseLeave="Rectangle_MouseLeave" IsMoveToPointEnabled="True" HorizontalAlignment="Left" Width="542" VerticalAlignment="Top" Margin="116,839,0,0" Value="0" Style="{DynamicResource SliderStyle1}" Height="66" AutoToolTipPrecision="0" AutoToolTipPlacement="TopLeft"/>
        <Popup Name="floatingTip" AllowsTransparency="True" Placement="Relative"  PlacementTarget="{Binding ElementName=bla}">
            <Border BorderBrush="Black" BorderThickness="1" Padding="4">
                <TextBlock Text="{Binding ElementName=bla, Path=Value}"></TextBlock>
            </Border>
        </Popup>
    </Grid>
</Window>

我的代码隐藏:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WPFMavka
{
    /// <summary>
    /// Interaction logic for VideoPlayer.xaml
    /// </summary>
    public partial class VideoPlayer : Window
    {
        public VideoPlayer()
        {
            InitializeComponent();
        }

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            Environment.Exit(1);
        }

        private void Rectangle_MouseMove(object sender, MouseEventArgs e)
        {
            if (!floatingTip.IsOpen) { floatingTip.IsOpen = true; }

            Point currentPos = e.GetPosition(bla);

            floatingTip.HorizontalOffset = currentPos.X-14;
            floatingTip.VerticalOffset = -32;
        }

        private void Rectangle_MouseLeave(object sender, MouseEventArgs e)
        {
            floatingTip.IsOpen = false;
        }
    }
}

Answer 1

找到了更好的解决方案 - 更改 TextBlock onMouseOver 幻灯片 > 我得到鼠标在 slider 上的当前位置，然后使用 .ValueFromPoint()

XAML:

<Window x:Class="WPFMavka.VideoPlayer"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WPFMavka"
        Title="MainWindow" WindowStyle="None" Width="1920" Height="1080" WindowState="Maximized" KeyboardNavigation.TabNavigation="None" Closing="Window_Closing">
    <Grid Name="tst">
        <local:MetroSlider x:Name="slider" MouseMove="slider_MouseMove" MouseLeave="slider_MouseLeave" IsMoveToPointEnabled="True" HorizontalAlignment="Left" Width="746" VerticalAlignment="Top" Margin="330,851,0,0" Value="0" Style="{DynamicResource SliderStyle1}" Height="44"/>
        <Popup Name="floatingTip" AllowsTransparency="True" Placement="Relative"  PlacementTarget="{Binding ElementName=slider}">
            <Border Name="floatingTipBorder" BorderBrush="Black" BorderThickness="1" Padding="4">
                <TextBlock Name="sliderTextBlock"/>
            </Border>
        </Popup>
    </Grid>
</Window>

代码隐藏:

private void slider_MouseMove(object sender, MouseEventArgs e)
{
   if (!floatingTip.IsOpen) { floatingTip.IsOpen = true; }

   Point currentPos = e.GetPosition(slider);
   Track _track = slider.Template.FindName("PART_Track", slider) as Track;

   sliderTextBlock.Text = _track.ValueFromPoint(currentPos).ToString();

   floatingTip.HorizontalOffset = currentPos.X -(floatingTipBorder.ActualWidth / 2);
   floatingTip.VerticalOffset = -32;
}

private void slider_MouseLeave(object sender, MouseEventArgs e)
{
   floatingTip.IsOpen = false;
}