Question

我创建了一个可移动的UserControl

    <UserControl x:Class="Restaurant.Views.Managerer.TablePanel"
        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:Restaurant.Helpers.Converter"
        mc:Ignorable="d"
        x:Name="root"
        MouseLeftButtonDown="root_MouseLeftButtonDown"
        MouseLeftButtonUp="root_MouseLeftButtonUp"
        MouseMove="root_MouseMove"    
        DataContext="{Binding RelativeSource={RelativeSource Self}}">
....

代码

Point anchorPoint;
        Point currentPoint;
        bool isInDrag = false;

        private void root_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            var element = sender as FrameworkElement;
            anchorPoint = e.GetPosition(null);
            element.CaptureMouse();
            isInDrag = true;
            e.Handled = true;
        }

        private void root_MouseMove(object sender, MouseEventArgs e)
        {
            if (isInDrag)
            {
                var element = sender as FrameworkElement;
                currentPoint = e.GetPosition(null);

                var transform = new TranslateTransform
                                    {
                                        X = (currentPoint.X - anchorPoint.X),
                                        Y = (currentPoint.Y - anchorPoint.Y)
                                    };
                this.RenderTransform = transform;
                anchorPoint = currentPoint;
            }
        }

        private void root_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            if (isInDrag)
            {
                var element = sender as FrameworkElement;
                element.ReleaseMouseCapture();
                isInDrag = false;
                e.Handled = true;
            }
        }

如果我从

更改代码

X = (currentPoint.X - anchorPoint.X),
Y = (currentPoint.Y - anchorPoint.Y)

到

X = (currentPoint.X),
Y = (currentPoint.Y)

我可以移动UserControl，但鼠标与UserControl不匹配

Answer 1

早上好。我睡了，可以想）））

 private TranslateTransform transform = new TranslateTransform();
        private void root_MouseMove(object sender, MouseEventArgs e)
        {
            if (isInDrag)
            {
                var element = sender as FrameworkElement;
                currentPoint = e.GetPosition(null);

                transform.X += currentPoint.X - anchorPoint.X;
                transform.Y += (currentPoint.Y - anchorPoint.Y);
                this.RenderTransform = transform;
                anchorPoint = currentPoint;
            }
        }

Answer 2

我真的不确定你在问题中想要完成的是什么，但拇指更容易拖动动作。您可以看到解释和示例代码（位于底部）here。

Answer 3

根据 @Mediator 答案中的信息。我已经进行了编辑，以防止控件超出范围。

private TranslateTransform transform = new TranslateTransform();
    private void root_MouseMove(object sender, MouseEventArgs e)
    {
        if (isInDrag)
        {
            var element = sender as FrameworkElement;
            currentPoint = e.GetPosition(null);

            transform.X += currentPoint.X - anchorPoint.X;
            transform.Y += (currentPoint.Y - anchorPoint.Y);
            if (currentPoint.X < Application.Current.MainWindow.RenderSize.Width && currentPoint.Y < Application.Current.MainWindow.RenderSize.Height
                && currentPoint.X > 0 && currentPoint.Y > 0 )
            {
                this.RenderTransform = transform;
                anchorPoint = currentPoint;
            }
            else
            {
                transform = new TranslateTransform();
                this.RenderTransform = transform;
            }
        }
    }

但绑定错误是他们在VS中的输出窗口。

看起来这是WPF中的一个问题，但微软无法修复。

有关详细信息，请按：

https://connect.microsoft.com/VisualStudio/feedback/details/1423399/system-windows-data-error-4-when-using-relativesource-findancestor-inside-a-translatetransform-inside-a-style

拖动WPF用户控件

代码

3 个答案: