Question

我找到了允许在窗口中拖动网格的解决方案。但我正在使用MVVM。如何在MVVM中完成？我需要使用什么？内容控制或其他方面？

<Grid x:Name="grid" Background="Blue" 
  Width="100" Height="100" 
  MouseDown="Grid_MouseDown" MouseMove="Grid_MouseMove" MouseUp="Grid_MouseUp">
<Grid.RenderTransform>
    <TranslateTransform x:Name="tt"/>
</Grid.RenderTransform>

<Window x:Name="window" ...>
<Grid x:Name="grid"...

Point m_start;
Vector m_startOffset;

private void Grid_MouseDown(object sender, MouseButtonEventArgs e)
{
m_start = e.GetPosition(window);
m_startOffset = new Vector(tt.X, tt.Y);
grid.CaptureMouse();
}

private void Grid_MouseMove(object sender, MouseEventArgs e)
{
if (grid.IsMouseCaptured)
{
    Vector offset = Point.Subtract(e.GetPosition(window), m_start);

    tt.X = m_startOffset.X + offset.X;
    tt.Y = m_startOffset.Y + offset.Y;
}
}

private void Grid_MouseUp(object sender, MouseButtonEventArgs e)
{
grid.ReleaseMouseCapture();
}

Answer 1

MVVM与此无关。如果你想移动东西并从鼠标/窗口获取事件，这只能通过后面的代码完成 MVVM命令/ RelayCommand用于model / viewmodel / View处理。不适合鼠标，窗口互动。

你可以使用输入绑定等等，但基本上你正在做的是正确的方法

Mvvm在窗口中拖动网格

1 个答案: