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ClemensFischer
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commit
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152 changed files with 11962 additions and 12115 deletions
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@ -17,240 +17,239 @@ using Avalonia.Controls;
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using Brush = Avalonia.Media.IBrush;
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#endif
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namespace MapControl
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namespace MapControl;
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public interface IMapLayer : IMapElement
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{
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public interface IMapLayer : IMapElement
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Brush MapBackground { get; }
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Brush MapForeground { get; }
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}
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public partial class MapBase
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{
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public static readonly DependencyProperty MapLayerProperty =
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DependencyPropertyHelper.Register<MapBase, object>(nameof(MapLayer), null,
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(map, oldValue, newValue) => map.MapLayerPropertyChanged(oldValue, newValue));
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public static readonly DependencyProperty MapLayersSourceProperty =
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DependencyPropertyHelper.Register<MapBase, IEnumerable>(nameof(MapLayersSource), null,
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(map, oldValue, newValue) => map.MapLayersSourcePropertyChanged(oldValue, newValue));
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/// <summary>
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/// Gets or sets the base map layer, which is added as first element to the Children collection.
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/// If the passed object is not a FrameworkElement, MapBase tries to locate a DataTemplate
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/// resource for the object's type and generate a FrameworkElement from that DataTemplate.
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/// If the FrameworkElement implements IMapLayer (like e.g. TilePyramidLayer or MapImageLayer),
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/// its (non-null) MapBackground and MapForeground property values are used for the MapBase
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/// Background and Foreground.
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/// </summary>
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public object MapLayer
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{
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Brush MapBackground { get; }
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Brush MapForeground { get; }
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get => GetValue(MapLayerProperty);
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set => SetValue(MapLayerProperty, value);
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}
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public partial class MapBase
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/// <summary>
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/// Holds a collection of map layers, either FrameworkElements or plain objects with
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/// an associated DataTemplate resource from which a FrameworkElement can be created.
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/// FrameworkElemens are added to the Children collection, starting at index 0.
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/// The first element of this collection is assigned to the MapLayer property.
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/// Subsequent changes of the MapLayer or Children properties are not reflected
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/// by the MapLayersSource collection.
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/// </summary>
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public IEnumerable MapLayersSource
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{
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public static readonly DependencyProperty MapLayerProperty =
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DependencyPropertyHelper.Register<MapBase, object>(nameof(MapLayer), null,
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(map, oldValue, newValue) => map.MapLayerPropertyChanged(oldValue, newValue));
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get => (IEnumerable)GetValue(MapLayersSourceProperty);
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set => SetValue(MapLayersSourceProperty, value);
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}
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public static readonly DependencyProperty MapLayersSourceProperty =
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DependencyPropertyHelper.Register<MapBase, IEnumerable>(nameof(MapLayersSource), null,
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(map, oldValue, newValue) => map.MapLayersSourcePropertyChanged(oldValue, newValue));
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private void MapLayerPropertyChanged(object oldLayer, object newLayer)
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{
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bool IsMapLayer(object layer) => Children.Count > 0 &&
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(Children[0] == layer as FrameworkElement ||
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((FrameworkElement)Children[0]).DataContext == layer);
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/// <summary>
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/// Gets or sets the base map layer, which is added as first element to the Children collection.
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/// If the passed object is not a FrameworkElement, MapBase tries to locate a DataTemplate
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/// resource for the object's type and generate a FrameworkElement from that DataTemplate.
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/// If the FrameworkElement implements IMapLayer (like e.g. TilePyramidLayer or MapImageLayer),
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/// its (non-null) MapBackground and MapForeground property values are used for the MapBase
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/// Background and Foreground.
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/// </summary>
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public object MapLayer
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if (oldLayer != null && IsMapLayer(oldLayer))
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{
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get => GetValue(MapLayerProperty);
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set => SetValue(MapLayerProperty, value);
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RemoveChildElement(0);
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}
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/// <summary>
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/// Holds a collection of map layers, either FrameworkElements or plain objects with
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/// an associated DataTemplate resource from which a FrameworkElement can be created.
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/// FrameworkElemens are added to the Children collection, starting at index 0.
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/// The first element of this collection is assigned to the MapLayer property.
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/// Subsequent changes of the MapLayer or Children properties are not reflected
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/// by the MapLayersSource collection.
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/// </summary>
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public IEnumerable MapLayersSource
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if (newLayer != null && !IsMapLayer(newLayer))
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{
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get => (IEnumerable)GetValue(MapLayersSourceProperty);
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set => SetValue(MapLayersSourceProperty, value);
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InsertChildElement(0, GetMapLayer(newLayer));
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}
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}
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private void MapLayersSourcePropertyChanged(IEnumerable oldLayers, IEnumerable newLayers)
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{
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if (oldLayers != null)
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{
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if (oldLayers is INotifyCollectionChanged incc)
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{
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incc.CollectionChanged -= MapLayersSourceCollectionChanged;
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}
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RemoveMapLayers(oldLayers, 0);
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}
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private void MapLayerPropertyChanged(object oldLayer, object newLayer)
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if (newLayers != null)
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{
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bool IsMapLayer(object layer) => Children.Count > 0 &&
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(Children[0] == layer as FrameworkElement ||
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((FrameworkElement)Children[0]).DataContext == layer);
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if (oldLayer != null && IsMapLayer(oldLayer))
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if (newLayers is INotifyCollectionChanged incc)
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{
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RemoveChildElement(0);
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incc.CollectionChanged += MapLayersSourceCollectionChanged;
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}
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if (newLayer != null && !IsMapLayer(newLayer))
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{
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InsertChildElement(0, GetMapLayer(newLayer));
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}
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AddMapLayers(newLayers, 0);
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}
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}
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private void MapLayersSourcePropertyChanged(IEnumerable oldLayers, IEnumerable newLayers)
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private void MapLayersSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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switch (e.Action)
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{
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if (oldLayers != null)
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{
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if (oldLayers is INotifyCollectionChanged incc)
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{
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incc.CollectionChanged -= MapLayersSourceCollectionChanged;
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}
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case NotifyCollectionChangedAction.Add:
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AddMapLayers(e.NewItems, e.NewStartingIndex);
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break;
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RemoveMapLayers(oldLayers, 0);
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}
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case NotifyCollectionChangedAction.Remove:
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RemoveMapLayers(e.OldItems, e.OldStartingIndex);
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break;
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if (newLayers != null)
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{
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if (newLayers is INotifyCollectionChanged incc)
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{
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incc.CollectionChanged += MapLayersSourceCollectionChanged;
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}
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case NotifyCollectionChangedAction.Replace:
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RemoveMapLayers(e.OldItems, e.OldStartingIndex);
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AddMapLayers(e.NewItems, e.NewStartingIndex);
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break;
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AddMapLayers(newLayers, 0);
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}
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case NotifyCollectionChangedAction.Reset:
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break;
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default:
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break;
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}
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}
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private void MapLayersSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
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private void AddMapLayers(IEnumerable layers, int index)
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{
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var mapLayers = layers.Cast<object>().Select(GetMapLayer).ToList();
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if (mapLayers.Count > 0)
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{
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switch (e.Action)
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{
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case NotifyCollectionChangedAction.Add:
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AddMapLayers(e.NewItems, e.NewStartingIndex);
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break;
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case NotifyCollectionChangedAction.Remove:
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RemoveMapLayers(e.OldItems, e.OldStartingIndex);
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break;
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case NotifyCollectionChangedAction.Replace:
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RemoveMapLayers(e.OldItems, e.OldStartingIndex);
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AddMapLayers(e.NewItems, e.NewStartingIndex);
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break;
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case NotifyCollectionChangedAction.Reset:
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break;
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default:
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break;
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}
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}
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private void AddMapLayers(IEnumerable layers, int index)
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{
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var mapLayers = layers.Cast<object>().Select(GetMapLayer).ToList();
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if (mapLayers.Count > 0)
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{
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#if WPF // Execute at DispatcherPriority.DataBind to ensure that all bindings are evaluated.
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//
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Dispatcher.Invoke(() => AddMapLayers(mapLayers, index), DispatcherPriority.DataBind);
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//
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Dispatcher.Invoke(() => AddMapLayers(mapLayers, index), DispatcherPriority.DataBind);
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#else
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AddMapLayers(mapLayers, index);
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AddMapLayers(mapLayers, index);
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#endif
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}
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}
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private void AddMapLayers(List<FrameworkElement> mapLayers, int index)
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{
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foreach (var mapLayer in mapLayers)
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{
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InsertChildElement(index, mapLayer);
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if (index++ == 0)
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{
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MapLayer = mapLayer;
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}
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}
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}
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private void RemoveMapLayers(IEnumerable layers, int index)
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{
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foreach (var _ in layers)
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{
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RemoveChildElement(index);
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}
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if (index == 0)
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{
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MapLayer = null;
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}
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}
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private void InsertChildElement(int index, FrameworkElement element)
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{
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if (index == 0 && element is IMapLayer mapLayer)
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{
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if (mapLayer.MapBackground != null)
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{
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Background = mapLayer.MapBackground;
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}
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if (mapLayer.MapForeground != null)
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{
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Foreground = mapLayer.MapForeground;
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}
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}
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private void AddMapLayers(List<FrameworkElement> mapLayers, int index)
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{
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foreach (var mapLayer in mapLayers)
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{
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InsertChildElement(index, mapLayer);
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Children.Insert(index, element);
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}
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if (index++ == 0)
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{
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MapLayer = mapLayer;
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}
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private void RemoveChildElement(int index)
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{
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if (index == 0 && Children[0] is IMapLayer mapLayer)
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{
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if (mapLayer.MapBackground != null)
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{
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ClearValue(BackgroundProperty);
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}
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if (mapLayer.MapForeground != null)
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{
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ClearValue(ForegroundProperty);
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}
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}
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private void RemoveMapLayers(IEnumerable layers, int index)
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{
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foreach (var _ in layers)
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{
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RemoveChildElement(index);
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}
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Children.RemoveAt(index);
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}
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if (index == 0)
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{
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MapLayer = null;
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}
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private FrameworkElement GetMapLayer(object layer)
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{
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FrameworkElement mapLayer = null;
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if (layer != null)
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{
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mapLayer = layer as FrameworkElement ?? TryLoadDataTemplate(layer);
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}
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private void InsertChildElement(int index, FrameworkElement element)
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{
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if (index == 0 && element is IMapLayer mapLayer)
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{
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if (mapLayer.MapBackground != null)
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{
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Background = mapLayer.MapBackground;
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}
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return mapLayer ?? new MapTileLayer();
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}
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if (mapLayer.MapForeground != null)
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{
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Foreground = mapLayer.MapForeground;
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}
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}
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Children.Insert(index, element);
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}
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private void RemoveChildElement(int index)
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{
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if (index == 0 && Children[0] is IMapLayer mapLayer)
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{
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if (mapLayer.MapBackground != null)
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{
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ClearValue(BackgroundProperty);
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}
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if (mapLayer.MapForeground != null)
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{
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ClearValue(ForegroundProperty);
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}
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}
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Children.RemoveAt(index);
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}
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private FrameworkElement GetMapLayer(object layer)
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{
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FrameworkElement mapLayer = null;
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if (layer != null)
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{
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mapLayer = layer as FrameworkElement ?? TryLoadDataTemplate(layer);
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}
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return mapLayer ?? new MapTileLayer();
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}
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private FrameworkElement TryLoadDataTemplate(object layer)
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{
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FrameworkElement element = null;
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private FrameworkElement TryLoadDataTemplate(object layer)
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{
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FrameworkElement element = null;
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#if AVALONIA
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if (this.TryFindResource(layer.GetType().FullName, out object value) &&
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value is Avalonia.Markup.Xaml.Templates.DataTemplate template)
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{
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element = template.Build(layer);
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}
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#elif WPF
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if (TryFindResource(new DataTemplateKey(layer.GetType())) is DataTemplate template)
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{
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element = (FrameworkElement)template.LoadContent();
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}
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#else
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if (TryFindResource(this, layer.GetType().FullName) is DataTemplate template)
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{
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element = (FrameworkElement)template.LoadContent();
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}
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#endif
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element?.DataContext = layer;
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return element;
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if (this.TryFindResource(layer.GetType().FullName, out object value) &&
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value is Avalonia.Markup.Xaml.Templates.DataTemplate template)
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{
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element = template.Build(layer);
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}
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#elif WPF
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if (TryFindResource(new DataTemplateKey(layer.GetType())) is DataTemplate template)
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{
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element = (FrameworkElement)template.LoadContent();
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}
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#else
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if (TryFindResource(this, layer.GetType().FullName) is DataTemplate template)
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{
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element = (FrameworkElement)template.LoadContent();
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}
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#endif
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element?.DataContext = layer;
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return element;
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}
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#if UWP || WINUI
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private static object TryFindResource(FrameworkElement element, object key)
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{
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return element.Resources.ContainsKey(key)
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? element.Resources[key]
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: element.Parent is FrameworkElement parent
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? TryFindResource(parent, key)
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: null;
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}
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#endif
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private static object TryFindResource(FrameworkElement element, object key)
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{
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return element.Resources.ContainsKey(key)
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? element.Resources[key]
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: element.Parent is FrameworkElement parent
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? TryFindResource(parent, key)
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: null;
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}
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#endif
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}
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