Question

当鼠标在边框控件之外时，我无法移动边框控件

<Window
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication2"
  x:Class="WpfApplication2.MainWindow"
  x:Name="Window"
  Title="Window1"
  Width="346.5" Height="215" WindowStyle="SingleBorderWindow" >

    <Grid Name="stack" >

        <Border x:Name="btn" Width="50" Height="20" VerticalAlignment="Top" BorderThickness="1" BorderBrush="Black" Background="#FFF50000"
                MouseMove="btn_MouseMove" MouseDown="btn_MouseDown" MouseUp="btn_MouseUp"  />
    </Grid>
</Window>

背后的代码

bool state = false;
Point prePoint;

private void btn_MouseMove(object sender, MouseEventArgs e)
{
    if (state)
    {
        Point p = e.GetPosition(this);
        Point p2 = e.GetPosition(btn);
        btn.Margin = new Thickness(0, p.Y - p2.Y + p.Y - prePoint.Y, 0, 0);
        prePoint = e.GetPosition(this);
    }
}
private void btn_MouseDown(object sender, MouseButtonEventArgs e)
{
    if (sender == btn)
    {
        prePoint = e.GetPosition(this);
        state = true;
    }
}

private void btn_MouseUp(object sender, MouseButtonEventArgs e)
{
    state = false;
}

Answer 1

因为当鼠标处于边界控制时鼠标移动事件会触发。我认为你需要为窗口添加鼠标移动事件而不是边框控制

Answer 2

只需捕捉鼠标在边框内并在任务完成后释放它，否则它会粘住。或者acc。你的代码可能是这样的 - ＆gt;

bool state = false;
Point prePoint;

private void btn_MouseMove(object sender, MouseEventArgs e)
{
if (state)
{
    Point p = e.GetPosition(this);
    Point p2 = e.GetPosition(btn);
    btn.Margin = new Thickness(0, p.Y - p2.Y + p.Y - prePoint.Y, 0, 0);
    prePoint = e.GetPosition(this);
    // Capture Mouse here ! as far as i think. !!!
    Mouse.Capture(this.ColorPlane, CaptureMode.Element);
}
else
{
    // Release Mouse here ! as far as i think. !!!
    Mouse.Capture(null);
}
}

如何通过鼠标在面板中移动控件

2 个答案: