如何在WPF窗口中移動網格面板

Question

HI，

如何在WPF窗口內移動（拖動）網格面板？ 網格面板沒有位置或位置或X和Y坐標屬性。 我所看到的就是使用鼠標將Grid Panel從當前位置移動到新位置，以便顯示在其下方“埋葬”的控件。

有什么指針嗎？

非常感謝。

Answer 1

這里有一些代碼示例可以幫助您入門：

在XAML中：

創建一個網格並在其上定義渲染變換：

<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>

命名您希望網格在其中移動的控件：

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

代碼背后：

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 2

根據Josh G的回答

如果你想移動一個網格，但是缺少幾個元素移動的能力，Josh的答案非常好。
這是如何分別移動幾個元素

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>

代碼背后

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();
    }

Answer 3

    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); 
            }

}

Answer 4

只需將網格面板放在畫布內而不是直接放入窗口中 - 這樣就可以得到X / Y坐標。

然后，您可以使用自定義附加屬性實現拖放行為，如此處詳述（ http://www.deepcode.co.uk/archive/2008/11/16/using-attached-properties-to-compose-new -behaviour.aspx ）