WPF Scottplot获取鼠标滑过的位置

zhangmingze6162

已于 2024-04-21 10:32:50 修改

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文章标签： wpf

于 2024-04-21 10:29:48 首次发布

本文链接：https://blog.youkuaiyun.com/zhangmingze6162/article/details/138027009

版权

本文介绍了如何在Windows应用中使用ScottPlot库，跟踪在DPI缩放显示中的鼠标位置，通过`DisplayScaling_MouseMove`事件处理程序实时更新Crosshair的位置。

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Scottplot获取鼠标滑过的位置

注册鼠标移动事件

 MouseMove += DisplayScaling_MouseMove;

移动执行代码

Point p = e.GetPosition(WpfPlot1);
ScottPlot.Pixel mousePixel = new(p.X * WpfPlot1.DisplayScale, p.Y * WpfPlot1.DisplayScale);
ScottPlot.Coordinates coordinates = WpfPlot1.Plot.GetCoordinates(mousePixel);
Crosshair.Position = coordinates;
WpfPlot1.Refresh();

完整CS代码

using System.Windows;

namespace WPF_Demo.DemoWindows;

public partial class DisplayScaling : Window, IDemoWindow
{
    public string DemoTitle => "Display Scaling";
    public string Description => "Demonstrates how to track " +
        "mouse position on displays which use DPI scaling.";

    readonly ScottPlot.Plottables.Crosshair Crosshair;

    public DisplayScaling()
    {
        InitializeComponent();

        WpfPlot1.Plot.Add.Signal(ScottPlot.Generate.Sin());
        WpfPlot1.Plot.Add.Signal(ScottPlot.Generate.Cos());
        Crosshair = WpfPlot1.Plot.Add.Crosshair(0, 0);

        MouseMove += DisplayScaling_MouseMove;
    }

    private void DisplayScaling_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
    {
        Point p = e.GetPosition(WpfPlot1);
        ScottPlot.Pixel mousePixel = new(p.X * WpfPlot1.DisplayScale, p.Y * WpfPlot1.DisplayScale);
        ScottPlot.Coordinates coordinates = WpfPlot1.Plot.GetCoordinates(mousePixel);
        Crosshair.Position = coordinates;
        WpfPlot1.Refresh();
    }

    private void WpfPlot1_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
    {
       
    }
}

完整xam

<Window x:Class="WPF_Demo.DemoWindows.DisplayScaling"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPF_Demo.DemoWindows" xmlns:wpf="clr-namespace:ScottPlot.WPF;assembly=ScottPlot.WPF"
        mc:Ignorable="d"
        WindowStartupLocation="CenterScreen"
        Title="Display Scaling Demo" Height="400" Width="600">
    <Viewbox >
        <wpf:WpfPlot Name="WpfPlot1" Width="500" Height="400" Mouse.MouseMove="WpfPlot1_MouseMove"/>
    </Viewbox>
   
</Window>

运行效果

在这里插入图片描述