ClemensFischer/XAML-Map-Control
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WPF specific file names

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ClemensFischer 2025-12-05 15:07:44 +01:00
parent 172a388841
commit 21d7938d33
4 changed files with 95 additions and 55 deletions
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111
MapControl/WPF/DrawingTileMatrixLayer.WPF.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Media;
namespace MapControl
{
public class DrawingTileMatrixLayer(WmtsTileMatrix wmtsTileMatrix, int zoomLevel) : UIElement
{
public WmtsTileMatrix WmtsTileMatrix => wmtsTileMatrix;
public TileMatrix TileMatrix { get; private set; } = new TileMatrix(zoomLevel, 1, 1, 0, 0);
public IEnumerable<DrawingTile> Tiles { get; private set; } = [];
public DrawingGroup Drawing { get; } = new DrawingGroup { Transform = new MatrixTransform() };
protected override void OnRender(DrawingContext drawingContext)
{
drawingContext.DrawDrawing(Drawing);
}
public void UpdateRenderTransform(ViewTransform viewTransform)
{
// Tile matrix origin in pixels.
//
var tileMatrixOrigin = new Point(WmtsTileMatrix.TileWidth * TileMatrix.XMin, WmtsTileMatrix.TileHeight * TileMatrix.YMin);
((MatrixTransform)Drawing.Transform).Matrix =
viewTransform.GetTileLayerTransform(WmtsTileMatrix.Scale, WmtsTileMatrix.TopLeft, tileMatrixOrigin);
}
public bool UpdateTiles(ViewTransform viewTransform, double viewWidth, double viewHeight)
{
// Tile matrix bounds in pixels.
//
var bounds = viewTransform.GetTileMatrixBounds(WmtsTileMatrix.Scale, WmtsTileMatrix.TopLeft, viewWidth, viewHeight);
// Tile X and Y bounds.
//
var xMin = (int)Math.Floor(bounds.X / WmtsTileMatrix.TileWidth);
var yMin = (int)Math.Floor(bounds.Y / WmtsTileMatrix.TileHeight);
var xMax = (int)Math.Floor((bounds.X + bounds.Width) / WmtsTileMatrix.TileWidth);
var yMax = (int)Math.Floor((bounds.Y + bounds.Height) / WmtsTileMatrix.TileHeight);
if (!WmtsTileMatrix.HasFullHorizontalCoverage)
{
// Set X range limits.
//
xMin = Math.Max(xMin, 0);
xMax = Math.Min(Math.Max(xMax, 0), WmtsTileMatrix.MatrixWidth - 1);
}
// Set Y range limits.
//
yMin = Math.Max(yMin, 0);
yMax = Math.Min(Math.Max(yMax, 0), WmtsTileMatrix.MatrixHeight - 1);
if (TileMatrix.XMin == xMin && TileMatrix.YMin == yMin &&
TileMatrix.XMax == xMax && TileMatrix.YMax == yMax)
{
// No change of the TileMatrix and the Tiles collection.
//
return false;
}
TileMatrix = new TileMatrix(TileMatrix.ZoomLevel, xMin, yMin, xMax, yMax);
CreateTiles();
return true;
}
private void CreateTiles()
{
var tileCount = TileMatrix.Width * TileMatrix.Height;
var tiles = new List<DrawingTile>(tileCount);
var drawings = new DrawingCollection(tileCount);
for (var y = TileMatrix.YMin; y <= TileMatrix.YMax; y++)
{
for (var x = TileMatrix.XMin; x <= TileMatrix.XMax; x++)
{
var tile = Tiles.FirstOrDefault(t => t.X == x && t.Y == y);
if (tile == null)
{
tile = new DrawingTile(TileMatrix.ZoomLevel, x, y, WmtsTileMatrix.MatrixWidth);
var equivalentTile = Tiles.FirstOrDefault(t => t.ImageSource != null && t.Column == tile.Column && t.Row == tile.Row);
if (equivalentTile != null)
{
tile.IsPending = false;
tile.ImageSource = equivalentTile.ImageSource; // no Opacity animation
}
}
tile.SetRect(TileMatrix.XMin, TileMatrix.YMin, WmtsTileMatrix.TileWidth, WmtsTileMatrix.TileHeight);
tiles.Add(tile);
drawings.Add(tile.Drawing);
}
}
Tiles = tiles;
Drawing.Children = drawings;
}
}
}