ClemensFischer/XAML-Map-Control
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Update WmsImageLayer.cs

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This commit is contained in:
ClemensF 2020-07-15 16:40:33 +02:00
parent 6fdb611c7d
commit fb68983749
2 changed files with 68 additions and 49 deletions
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85
MapControl/Shared/WmsImageLayer.cs
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@ -36,6 +36,14 @@ namespace MapControl
nameof(Styles), typeof(string), typeof(WmsImageLayer),
new PropertyMetadata(string.Empty, async (o, e) => await ((WmsImageLayer)o).UpdateImageAsync()));
public WmsImageLayer()
{
foreach (FrameworkElement child in Children)
{
child.UseLayoutRounding = true;
}
}
/// <summary>
/// The base request URL.
/// </summary>
@ -64,7 +72,29 @@ namespace MapControl
}
/// <summary>
/// Calls GetCapabilitiesRequestUri() and asynchronously loads an XElement from the returned URL.
/// Gets a list of all layer names returned by a GetCapabilities response.
/// </summary>
public async Task<IEnumerable<string>> GetLayerNamesAsync()
{
IEnumerable<string> layerNames = null;
var capabilities = await GetCapabilitiesAsync();
if (capabilities != null)
{
var ns = capabilities.Name.Namespace;
layerNames = capabilities
.Descendants(ns + "Layer")
.Select(e => e.Element(ns + "Name")?.Value)
.Where(n => !string.IsNullOrEmpty(n));
}
return layerNames;
}
/// <summary>
/// Loads an XElement from the URL returned by GetCapabilitiesRequestUri().
/// </summary>
public async Task<XElement> GetCapabilitiesAsync()
{
@ -91,7 +121,7 @@ namespace MapControl
}
/// <summary>
/// Calls GetFeatureInfoRequestUri() and asynchronously loads an XElement from the returned URL.
/// Loads an XElement from the URL returned by GetFeatureInfoRequestUri().
/// </summary>
public async Task<XElement> GetFeatureInfoAsync(Point position)
{
@ -118,29 +148,7 @@ namespace MapControl
}
/// <summary>
/// Gets a list of all layer names returned by a GetCapabilities response.
/// </summary>
public async Task<IEnumerable<string>> GetLayerNamesAsync()
{
IEnumerable<string> layerNames = null;
var capabilities = await GetCapabilitiesAsync();
if (capabilities != null)
{
var ns = capabilities.Name.Namespace;
layerNames = capabilities
.Descendants(ns + "Layer")
.Select(e => e.Element(ns + "Name")?.Value)
.Where(n => !string.IsNullOrEmpty(n));
}
return layerNames;
}
/// <summary>
/// Calls GetMapRequestUri() and asynchronously loads an ImageSource from the returned URL.
/// Loads an ImageSource from the URL returned by GetMapRequestUri().
/// </summary>
protected override async Task<ImageSource> GetImageAsync()
{
@ -200,12 +208,13 @@ namespace MapControl
uri += "&FORMAT=image/png";
}
var rect = projection.BoundingBoxToRect(BoundingBox);
var mapRect = projection.BoundingBoxToRect(BoundingBox);
var viewScale = ParentMap.ViewTransform.Scale;
uri += "&CRS=" + projection.GetCrsValue();
uri += "&BBOX=" + projection.GetBboxValue(rect);
uri += "&WIDTH=" + (int)Math.Round(ParentMap.ViewTransform.Scale * rect.Width);
uri += "&HEIGHT=" + (int)Math.Round(ParentMap.ViewTransform.Scale * rect.Height);
uri += "&BBOX=" + projection.GetBboxValue(mapRect);
uri += "&WIDTH=" + (int)Math.Round(viewScale * mapRect.Width);
uri += "&HEIGHT=" + (int)Math.Round(viewScale * mapRect.Height);
}
return uri.Replace(" ", "%20");
@ -238,14 +247,20 @@ namespace MapControl
uri += "&QUERY_LAYERS=" + Layers;
}
var rect = projection.BoundingBoxToRect(BoundingBox);
var image = Children[1]; // top Image element
var imagePos = ParentMap.TransformToVisual(image).Transform(position);
var mapRect = projection.BoundingBoxToRect(BoundingBox);
var viewRect = GetViewRectangle(mapRect);
var viewSize = ParentMap.RenderSize;
var transform = new Matrix(1, 0, 0, 1, -viewSize.Width / 2, -viewSize.Height / 2);
transform.Rotate(-viewRect.Rotation);
transform.Translate(viewRect.Width / 2, viewRect.Height / 2);
var imagePos = transform.Transform(position);
uri += "&CRS=" + projection.GetCrsValue();
uri += "&BBOX=" + projection.GetBboxValue(rect);
uri += "&WIDTH=" + (int)Math.Round(ParentMap.ViewTransform.Scale * rect.Width);
uri += "&HEIGHT=" + (int)Math.Round(ParentMap.ViewTransform.Scale * rect.Height);
uri += "&BBOX=" + projection.GetBboxValue(mapRect);
uri += "&WIDTH=" + (int)Math.Round(viewRect.Width);
uri += "&HEIGHT=" + (int)Math.Round(viewRect.Height);
uri += "&I=" + (int)Math.Round(imagePos.X);
uri += "&J=" + (int)Math.Round(imagePos.Y);
uri += "&INFO_FORMAT=text/xml";