ClemensFischer/XAML-Map-Control
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Minor improvements

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ClemensFischer 2025-11-19 17:49:49 +01:00
parent e0eb50b7da
commit 24dabf046d
3 changed files with 40 additions and 44 deletions
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74
MapControl/Shared/MapTileLayer.cs
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@ -99,20 +99,17 @@ namespace MapControl
protected override Size ArrangeOverride(Size finalSize)
{
if (TileMatrix != null)
foreach (var tile in Tiles)
{
foreach (var tile in Tiles)
{
// Arrange tiles relative to TileMatrix.XMin/YMin.
//
var tileSize = TileSize << (TileMatrix.ZoomLevel - tile.ZoomLevel);
var x = tileSize * tile.X - TileSize * TileMatrix.XMin;
var y = tileSize * tile.Y - TileSize * TileMatrix.YMin;
// Arrange tiles relative to TileMatrix.XMin/YMin.
//
var tileSize = TileSize << (TileMatrix.ZoomLevel - tile.ZoomLevel);
var x = tileSize * tile.X - TileSize * TileMatrix.XMin;
var y = tileSize * tile.Y - TileSize * TileMatrix.YMin;
tile.Image.Width = tileSize;
tile.Image.Height = tileSize;
tile.Image.Arrange(new Rect(x, y, tileSize, tileSize));
}
tile.Image.Width = tileSize;
tile.Image.Height = tileSize;
tile.Image.Arrange(new Rect(x, y, tileSize, tileSize));
}
return finalSize;
@ -122,9 +119,10 @@ namespace MapControl
{
if (ParentMap == null || !SupportedCrsIds.Contains(ParentMap.MapProjection.CrsId))
{
TileMatrix = null;
Children.Clear();
CancelLoadTiles();
Children.Clear();
Tiles.Clear();
TileMatrix = null;
}
else if (SetTileMatrix() || reset)
{
@ -183,39 +181,37 @@ namespace MapControl
{
var tiles = new ImageTileList();
if (TileSource != null && TileMatrix != null)
if (reset)
{
if (reset)
Tiles.Clear();
}
var maxZoomLevel = Math.Min(TileMatrix.ZoomLevel, MaxZoomLevel);
if (maxZoomLevel >= MinZoomLevel)
{
var minZoomLevel = IsBaseMapLayer
? Math.Max(TileMatrix.ZoomLevel - MaxBackgroundLevels, MinZoomLevel)
: maxZoomLevel;
for (var zoomLevel = minZoomLevel; zoomLevel <= maxZoomLevel; zoomLevel++)
{
Tiles.Clear();
}
var tileCount = 1 << zoomLevel; // per row and column
var maxZoomLevel = Math.Min(TileMatrix.ZoomLevel, MaxZoomLevel);
// Right-shift divides with rounding down also negative values, https://stackoverflow.com/q/55196178
//
var shift = TileMatrix.ZoomLevel - zoomLevel;
var xMin = TileMatrix.XMin >> shift; // may be < 0
var xMax = TileMatrix.XMax >> shift; // may be >= tileCount
var yMin = Math.Max(TileMatrix.YMin >> shift, 0);
var yMax = Math.Min(TileMatrix.YMax >> shift, tileCount - 1);
if (maxZoomLevel >= MinZoomLevel)
{
var minZoomLevel = IsBaseMapLayer
? Math.Max(TileMatrix.ZoomLevel - MaxBackgroundLevels, MinZoomLevel)
: maxZoomLevel;
for (var zoomLevel = minZoomLevel; zoomLevel <= maxZoomLevel; zoomLevel++)
{
var tileCount = 1 << zoomLevel; // per row and column
// Right-shift divides with rounding down also negative values, https://stackoverflow.com/q/55196178
//
var shift = TileMatrix.ZoomLevel - zoomLevel;
var xMin = TileMatrix.XMin >> shift; // may be < 0
var xMax = TileMatrix.XMax >> shift; // may be >= tileCount
var yMin = Math.Max(TileMatrix.YMin >> shift, 0);
var yMax = Math.Min(TileMatrix.YMax >> shift, tileCount - 1);
tiles.FillMatrix(Tiles, zoomLevel, xMin, yMin, xMax, yMax, tileCount);
}
tiles.FillMatrix(Tiles, zoomLevel, xMin, yMin, xMax, yMax, tileCount);
}
}
Tiles = tiles;
Children.Clear();
foreach (var tile in tiles)