Question

我尝试使用按钮拖动窗口，我有使用MouseDown事件拖动的代码

func mediaPickerDidCancel(_ mediaPicker: MPMediaPickerController!)

但是我想用一些按钮来做这个，因为我的表格是透明的，当我更改Button事件的代码时它不起作用

 private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.ChangedButton == MouseButton.Left)
                this.DragMove();
        }

一些想法？

Answer 1

使用border代替Button。因为DragMove仅适用于PrimaryMouseButton事件。不适用于Click事件

XAML

<Border Background="Blue" MouseLeftButtonDown="Border_MouseLeftButtonDown">
</Border>

CODE

private void Border_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
        DragMove();
}

Answer 2

我的最后代码在这里：

private Point startPoint;
private void btnChat_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            startPoint = e.GetPosition(btnChat);
        }

        private void btnChat_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            var currentPoint = e.GetPosition(btnChat);
            if (e.LeftButton == MouseButtonState.Pressed &&
                btnChat.IsMouseCaptured &&
                (Math.Abs(currentPoint.X - startPoint.X) >
                    SystemParameters.MinimumHorizontalDragDistance ||
                Math.Abs(currentPoint.Y - startPoint.Y) >
                    SystemParameters.MinimumVerticalDragDistance))
            {
                // Prevent Click from firing
                btnChat.ReleaseMouseCapture();
                DragMove();
            }
        }

Answer 3

您必须使用PreviewMouseDown而不是MouseDown事件。并且不要忘了将事件标记为“已处理”。

XAML代码：

<Button x:Name="Button_Move" PreviewMouseDown="Window_Main_MouseDown"/>

C＃代码：

private void Window_Main_MouseDown(object sender, MouseButtonEventArgs e)
{
    if (e.ChangedButton == System.Windows.Input.MouseButton.Left)
    {
        this.DragMove();
        e.Handled = true;
    }
}

使用按钮在桌面上拖动WPF窗口

3 个答案: