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Updated WmtsTileLayer

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ClemensFischer 2025-11-28 21:59:25 +01:00
parent 0f3635b97a
commit 733c3d1266
2 changed files with 35 additions and 30 deletions
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2
MapControl/Shared/MapTileLayer.cs
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@ -148,7 +148,7 @@ namespace MapControl
private bool SetTileMatrix()
{
// Add 0.001 to avoid rounding issues.
// Add 0.001 to avoid floating point precision.
//
var tileMatrixZoomLevel = (int)Math.Floor(ParentMap.ZoomLevel - ZoomLevelOffset + 0.001);
var tileMatrixScale = MapBase.ZoomLevelToScale(tileMatrixZoomLevel);

63
MapControl/Shared/WmtsTileLayer.cs
View file

@ -148,45 +148,50 @@ namespace MapControl
//
var maxScale = 1.001 * ParentMap.ViewTransform.Scale;
var tileMatrixes = tileMatrixSet.TileMatrixes.Where(matrix => matrix.Scale <= maxScale).ToList();
var childLayers = ChildLayers.Where(layer => tileMatrixes.Contains(layer.WmtsTileMatrix)).ToList();
if (tileMatrixes.Count == 0)
{
Children.Clear();
return false;
}
var maxLayers = Math.Max(MaxBackgroundLevels, 0) + 1;
if (!IsBaseMapLayer)
{
// Show only the last layer.
//
tileMatrixes = tileMatrixes.GetRange(tileMatrixes.Count - 1, 1);
}
else if (tileMatrixes.Count > maxLayers)
{
// Show not more than MaxBackgroundLevels + 1 layers.
//
tileMatrixes = tileMatrixes.GetRange(tileMatrixes.Count - maxLayers, maxLayers);
}
// Get reusable layers.
//
var layers = ChildLayers.Where(layer => tileMatrixes.Contains(layer.WmtsTileMatrix)).ToList();
var tilesChanged = false;
Children.Clear();
if (tileMatrixes.Count > 0)
foreach (var tileMatrix in tileMatrixes)
{
var maxLayers = Math.Max(MaxBackgroundLevels, 0) + 1;
// Pass index of tileMatrix in tileMatrixSet.TileMatrixes as zoom level to WmtsTileMatrixLayer ctor.
//
var layer = layers.FirstOrDefault(layer => layer.WmtsTileMatrix == tileMatrix) ??
new WmtsTileMatrixLayer(tileMatrix, tileMatrixSet.TileMatrixes.IndexOf(tileMatrix));
if (!IsBaseMapLayer)
if (layer.UpdateTiles(ParentMap.ViewTransform, ParentMap.ActualWidth, ParentMap.ActualHeight))
{
// Show only the last layer.
//
tileMatrixes = tileMatrixes.GetRange(tileMatrixes.Count - 1, 1);
}
else if (tileMatrixes.Count > maxLayers)
{
// Show not more than MaxBackgroundLevels + 1 layers.
//
tileMatrixes = tileMatrixes.GetRange(tileMatrixes.Count - maxLayers, maxLayers);
tilesChanged = true;
}
foreach (var tileMatrix in tileMatrixes)
{
// Reuse existing WmtsTileMatrixLayer or create a new one with the
// index of tileMatrix in tileMatrixSet.TileMatrixes as zoom level.
//
var layer = childLayers.FirstOrDefault(layer => layer.WmtsTileMatrix == tileMatrix) ??
new WmtsTileMatrixLayer(tileMatrix, tileMatrixSet.TileMatrixes.IndexOf(tileMatrix));
layer.UpdateRenderTransform(ParentMap.ViewTransform);
if (layer.UpdateTiles(ParentMap.ViewTransform, ParentMap.ActualWidth, ParentMap.ActualHeight))
{
tilesChanged = true;
}
layer.UpdateRenderTransform(ParentMap.ViewTransform);
Children.Add(layer);
}
Children.Add(layer);
}
return tilesChanged;