3

你好，

如何在 WPF 窗口内移动（拖动）网格面板？网格面板没有位置或位置或 X 和 Y 坐标属性。我所看到的只是使用鼠标将网格面板从其当前位置移动到新位置，以便显示在其下方“隐藏”的控件。

任何指针？

非常感谢。

4

4 回答 4

15

以下是一些帮助您入门的代码示例：

在 XAML 中：

创建一个网格并在其上定义一个渲染变换：

<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>
</Grid>

命名您希望网格在其中移动的控件：

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

在后面的代码中：

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();
}
于 2009-04-17T16:25:53.960 回答
3

基于 Josh G 的回答

如果您想移动一个网格，乔希的回答非常好，但缺乏移动多个元素的能力。
这是分别移动几个元素的方法

XAML

<Grid x:Name="gridHost">
    <Grid x:Name="gridBlue" Background="Blue" Width="100" Height="100" MouseDown="Grid_MouseDown" MouseMove="Grid_MouseMove" MouseUp="Grid_MouseUp" Margin="-100,0,0,0">
        <Grid.RenderTransform>
            <TranslateTransform/>
        </Grid.RenderTransform>
    </Grid>
    <Grid x:Name="gridRed" Background="Red" Width="100" Height="100" MouseDown="Grid_MouseDown" MouseMove="Grid_MouseMove" MouseUp="Grid_MouseUp" Margin="100,0,0,0">
        <Grid.RenderTransform>
            <TranslateTransform/>
        </Grid.RenderTransform>
    </Grid>
</Grid>

背后的代码

Point m_start;
    Vector m_startOffset;

    private void Grid_MouseDown(object sender, MouseButtonEventArgs e)
    {
        FrameworkElement element = sender as Grid;
        TranslateTransform translate = element.RenderTransform as TranslateTransform;

        m_start = e.GetPosition(gridHost);
        m_startOffset = new Vector(translate.X, translate.Y);
        element.CaptureMouse();
    }

    private void Grid_MouseMove(object sender, MouseEventArgs e)
    {
        FrameworkElement element = sender as Grid;
        TranslateTransform translate = element.RenderTransform as TranslateTransform;

        if (element.IsMouseCaptured)
        {
            Vector offset = Point.Subtract(e.GetPosition(gridHost), m_start);

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

    private void Grid_MouseUp(object sender, MouseButtonEventArgs e)
    {
        FrameworkElement element = sender as Grid;
        element.ReleaseMouseCapture();
    }
于 2015-11-23T22:06:33.983 回答
0

只需将网格面板放在画布内而不是直接放在窗口中 - 这将为其提供 X/Y 坐标。

然后，您可以使用自定义附加属性实现拖放行为，例如此处详述（http://www.deepcode.co.uk/archive/2008/11/16/using-attached-properties-to-compose-new -behaviour.aspx )

于 2009-04-17T22:03:11.730 回答
0 
    public void dragme(object sender, MouseButtonEventArgs e)
    {
        if (_Move.IsChecked == true)
            db.Attach((DependencyObject)sender);

}

//// MouseDragElementBehavior db;

 private void canvass_PreviewMouseDown(object sender, MouseButtonEventArgs e) 
    {
if (_Move.IsChecked == true && filmgrid.Visibility == Visibility.Visible)// == true)  
            {
                filmgrid.PreviewMouseDown += new MouseButtonEventHandler(dragme); 
            }

}

于 2014-06-20T07:13:50.243 回答