我有一个在WPF中创建的VSTS
控件,我在页面上实例化了其中两个:
BindableGrid
他们两个都在显示适当的图像;但是,当玩家占据的当前星系在我的游戏中改变时,只有starSystemMap控件会更新; galaxyMap控件也不会更新(应该在当前占用的系统上显示飞船图标)。我看不出这些控件的绑定方式有什么不同。每当玩家飞船迫使他们刷新时,我都会调用此代码:
<Viewbox Name="galaxyViewbox" Width="400" Height="400" DataContext="{x:Static models:Galaxy.Current}">
<local:BindableGrid x:Name="galaxyMap" ArraySource="{Binding StarSystemArray}" CellSize="16" BackgroundImage="/Images/Starfield.png">
<local:BindableGrid.ItemTemplate>
<DataTemplate>
<local:TileView ImagePaths="{Binding ImagePaths}"/>
</DataTemplate>
</local:BindableGrid.ItemTemplate>
</local:BindableGrid>
</Viewbox>
<Viewbox Name="starSystemViewbox" Stretch="Uniform" Grid.RowSpan="2" Grid.Column="1" DataContext="{x:Static models:StarSystem.Current}">
<Grid>
<local:BindableGrid x:Name="starSystemMap" ArraySource="{Binding SpaceObjectArray}" CellSize="64" BackgroundImage="/Images/Starfield.png">
<local:BindableGrid.ItemTemplate>
<DataTemplate>
<local:TileView ImagePaths="{Binding ImagePaths}"/>
</DataTemplate>
</local:BindableGrid.ItemTemplate>
</local:BindableGrid>
...
</Grid>
</Viewbox>
我知道还有其他代码与此交互。让我知道您是否还有其他需要解决的问题!谢谢!
编辑:共享更多细节,首先是BindableGrid.ArraySource:
galaxyMap.GetBindingExpression(BindableGrid.ArraySourceProperty).UpdateTarget();
starSystemMap.GetBindingExpression(BindableGrid.ArraySourceProperty).UpdateTarget();
和BindableGrid.OnPropertyChanged:
/// <summary>
/// The array to bind to. Should be a 1D or 2D array.
/// </summary>
public Array ArraySource
{
get { return (Array)GetValue(ArraySourceProperty); }
set { SetValue(ArraySourceProperty, value); }
}
// Using a DependencyProperty as the backing store for ArraySource. This enables animation, styling, binding, etc...
public static readonly DependencyProperty ArraySourceProperty =
DependencyProperty.Register(nameof(ArraySource), typeof(Array), typeof(BindableGrid), new PropertyMetadata(null));
编辑:这是我的ImagePaths属性,该属性不会反弹以显示每个恒星系统的最新图像:
protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
{
base.OnPropertyChanged(e);
if (e.Property == ArraySourceProperty || e.Property == ItemTemplateProperty || e.Property == CellSizeProperty || e.Property == BackgroundImageProperty)
{
if (ArraySource != null)
{
ColumnDefinitions.Clear();
RowDefinitions.Clear();
int width = ArraySource.GetLength(0);
int height = ArraySource.Rank == 1 ? 1 : ArraySource.GetLength(1);
for (var x = 0; x < width; x++)
ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(CellSize) });
for (var y = 0; y < height; y++)
RowDefinitions.Add(new RowDefinition { Height = new GridLength(CellSize) });
if (ItemTemplate != null)
{
for (var x = 0; x < width; x++)
{
for (var y = 0; y < height; y++)
{
var item = ArraySource.Rank == 1 ? ArraySource.GetValue(x) : ArraySource.GetValue(x, y);
var box = Children.Cast<UIElement>().Where(b => (int)b.GetValue(RowProperty) == y && (int)b.GetValue(ColumnProperty) == x && (int)b.GetValue(RowSpanProperty) == 1 && (int)b.GetValue(ColumnSpanProperty) == 1).SingleOrDefault();
if (box == null)
{
box = (UIElement)ItemTemplate.LoadContent();
box.SetValue(ColumnProperty, x);
box.SetValue(RowProperty, y);
Children.Add(box);
}
if (item == Wormholes.Models.StarSystem.Current)
{
}
box.SetValue(DataContextProperty, item);
}
}
}
}
if (bg != null)
bg.Source = BackgroundImage;
else
bg = new Image { Source = BackgroundImage };
if (ColumnDefinitions.Count > 0 && RowDefinitions.Count > 0)
{
bg.SetValue(ColumnSpanProperty, ColumnDefinitions.Count);
bg.SetValue(RowSpanProperty, RowDefinitions.Count);
if (!Children.Contains(bg))
Children.Add(bg);
}
}
}
}
在移出的恒星系统上调用RefreshImagePaths,而在更改恒星系统时又移入其中。
编辑:真正有趣的是,在绑定BindableGrid时我叫public ObservableCollection<string> ImagePaths { get; set; } = new ObservableCollection<string>();
public void RefreshImagePaths()
{
ImagePaths.Clear();
ImagePaths.Add("Star");
if (Current == this)
{
foreach (var ip in PlayerShip.Instance.ImagePaths)
ImagePaths.Add(ip);
}
}
,但未更新银河地图的UI ...
编辑:这是我的TileView.xaml.cs:
box.SetValue(DataContextProperty, item);
答案 0 :(得分:0)
我的 TileView
的 OnPropertyChanged
方法从未被调用,因为 TileView
的DataContext和 ImagePaths
从未实际上改变了;仅 ImagePaths
中的项目已更改。因此,我不得不在 BindableGrid.OnPropertyChanged
中强制刷新:
box.DataContext = null;
box.DataContext = item;
我敢肯定有更好的方法可以做到这一点,但目前为止,它可以工作!