我在Silverlight 3中有一个UserControl。
LayoutRoot网格包含一个子网，一个网格，由三列和两行组成。
以下是布局：
<Grid x:Name="LayoutRoot" Background="White">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid x:Name="NavigationGrid" Grid.RowSpan="2" Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<!-- Content placed here -->
</Grid>
<Border Background="Transparent" Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="0" BorderBrush="Black" BorderThickness="0,0,0,0" Height="38" HorizontalAlignment="Stretch" Width="Auto">
<!-- Content placed here -->
</Border>
<Border Background="Transparent" Grid.Column="2" Grid.Row="1" Grid.RowSpan="2" BorderBrush="Black" BorderThickness="0,0,1,1" Height="Auto" VerticalAlignment="Stretch" Width="38">
<!-- Content placed here -->
</Border>
<Border Grid.Row="1" Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Height="Auto" Background="White" BorderBrush="Black" BorderThickness="0,0,1,1" Width="Auto">
<!-- Content placed here -->
</Border>
</Grid>
</Grid>
我有使用装饰器的功能。装饰者将自己附加到指定的框架元素。
当用户单击位于名为NavigationGrid的网格的右上角的按钮时，将调用此功能。该按钮包含图钉图标。此功能从其父级子级中删除NavigationGrid网格，并将其添加到LayoutRoot网格的子级。装饰者允许用户能够在屏幕上拖动网格。
如果用户再次单击图钉按钮，则预期的功能是从LayoutRoot子项中删除网格，并使用Grid.Column，Grid.RowSpan等将其添加回原始父项的子项。值。
我遇到的问题是当NavigationGrid网格最初从它的父节点中删除时，网格中的所有其他元素都会调整大小等等。这是可以的，因为它是我想要的。但是，当网格被放回到它的父母的孩子身上时，它的位置与原来的不同。我检查了Margin属性，并将其设置为0.因此，因为它的位置与它的原始位置不同，所以我以编程方式将其边距设置为负值，将其视觉上放回原来的位置。这会抛弃其他元素的位置，一切都开始重叠等。
所以，我的问题是，是否有人知道如何实现此功能，以便可以从其父级移除NavigationGrid网格，然后将其放回到其父级，其原始位置/位置是否正常？
感谢。
克里斯
以下是UI的屏幕截图。出于显而易见的原因，我已经将UI的某些部分涂黑了。标签为“Processes”的左侧网格是用户应该能够“取消固定”并四处移动的网格，这确实有效，它是将其放回原位产生问题的功能。
alt text http://i45.tinypic.com/4rcpp5.jpg
请参阅下面的代码，该方法可以处理pin / unpin功能：
public void PinMenu(object parameter)
{
if (_navigationGridPinned)
{
PushPinImagePath = new Uri("../Images/pushpin_pinned.png", UriKind.Relative);
_navigationGridPinned = false;
var e = parameter as MouseButtonEventArgs;
if (!e.IsNull())
{
var grid = ValidationHelper.GetPanelFromVisualTree(Application.Current.RootVisual, "NavigationGrid") as Grid;
if (!grid.IsNull())
{
grid.MeasureAndArrange();
double gridHeight = grid.ActualHeight;
double gridWidth = grid.ActualWidth;
grid.HorizontalAlignment = HorizontalAlignment.Left;
grid.VerticalAlignment = VerticalAlignment.Top;
grid.Margin = new Thickness(0, 0, 0, 0);
var parent = grid.Parent as Grid;
parent.Children.Remove(grid);
var layoutRootGrid = parent.Parent as Grid;
if (!layoutRootGrid.IsNull())
{
_originalOffset = parent.TransformToVisual(layoutRootGrid).Transform(new Point(0, 0));
grid.Height = gridHeight;
grid.Width = gridWidth;
var border = grid.Children[0] as Border;
if (!border.IsNull())
{
border.BorderThickness = new Thickness(1, 1, 1, 1);
var backgroundBrush = App.Current.Resources["GradientBlueBrush"] as LinearGradientBrush;
if (!backgroundBrush.IsNull())
{
border.Background = backgroundBrush;
}
}
layoutRootGrid.Children.Add(grid);
Grid.SetRow(grid, 1);
_adorner = new Adorner();
_adorner.HorizontalAlignment = HorizontalAlignment.Left;
_adorner.VerticalAlignment = VerticalAlignment.Top;
_adorner.AdornedElement = grid as FrameworkElement;
_adorner.adorned_MouseLeftButtonDown((FrameworkElement)grid, e);
}
}
}
}
else
{
_navigationGridPinned = true;
PushPinImagePath = new Uri("../Images/pushpin.png", UriKind.Relative);
var grid = ValidationHelper.GetPanelFromVisualTree(Application.Current.RootVisual, "NavigationGrid") as Grid;
if (!grid.IsNull())
{
var parent = grid.Parent as Grid;
if (parent != null)
{
var mainViewGrid = ValidationHelper.GetPanelFromVisualTree(Application.Current.RootVisual, "MainViewGrid") as Grid;
var parentGrid = mainViewGrid.Parent as Grid;
var layoutRootGrid = parentGrid.Parent as Grid;
var currentOffset = grid.TransformToVisual(layoutRootGrid).Transform(new Point(0, 0));
Point p = new Point(-(currentOffset.X - _originalOffset.X), -(currentOffset.Y - _originalOffset.Y));
parent.Children.Remove(grid);
parent.UpdateLayout();
grid.MeasureAndArrange();
var navBorder = ValidationHelper.GetPanelFromVisualTree(Application.Current.RootVisual, "NavBorder") as Border;
var tabMenuBorder = ValidationHelper.GetPanelFromVisualTree(Application.Current.RootVisual, "TabMenuBorder") as Border;
var processMapBorder = ValidationHelper.GetPanelFromVisualTree(Application.Current.RootVisual, "ProcessMapBorder") as Border;
mainViewGrid.Children.Clear();
var border = grid.Children[0] as Border;
if (!border.IsNull())
{
border.Background = new SolidColorBrush(Colors.Transparent);
border.BorderThickness = new Thickness(1, 0, 1, 1);
}
_adorner.HorizontalAlignment = HorizontalAlignment.Left;
_adorner.VerticalAlignment = VerticalAlignment.Top;
_adorner.Margin = new Thickness(0, 0, 0, 0);
_adorner.AdornedElement = null;
mainViewGrid.Children.Add(tabMenuBorder);
Grid.SetColumn(tabMenuBorder, 2);
Grid.SetRowSpan(tabMenuBorder, 2);
Grid.SetRow(tabMenuBorder, 1);
mainViewGrid.Children.Add(processMapBorder);
Grid.SetColumn(processMapBorder, 1);
Grid.SetRow(processMapBorder, 1);
mainViewGrid.Children.Add(navBorder);
Grid.SetColumnSpan(navBorder, 2);
Grid.SetRow(navBorder, 0);
Grid.SetColumn(navBorder, 1);
grid.Margin = new Thickness(p.X, p.Y, 0, 0);
mainViewGrid.Children.Add(grid);
Grid.SetColumn(grid, 0);
Grid.SetRow(grid, 0);
Grid.SetRowSpan(grid, 2);
}
}
}
}
答案 0 :(得分：0)
一种策略可能是将“NavigationGrid”包装在容器网格“ContainerGrid”中，固定时为“Visible”，取消固定时为“Collapsed”。这样，在引脚操作期间重新生成父项时，可以将“NavigationGrid”放回到命名的“ContainerGrid”中。