public VisualTile(Tile tile, MultiScaleTileSource tileSource)
{
ZIndex = tile.Level;
Scale = 1 / tileSource.ScaleAtLevel(tile.Level);
var position = tileSource.GetTilePosition(tile.Column, tile.Row);
Left = position.X * Scale;
Top = position.Y * Scale;
}
/// <summary>
/// Handles changes to the Source property.
/// </summary>
private static void OnSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
MultiScaleImage target = (MultiScaleImage)d;
MultiScaleTileSource oldSource = (MultiScaleTileSource)e.OldValue;
MultiScaleTileSource newSource = target.Source;
target.OnSourceChanged(oldSource, newSource);
}
/// <summary>
/// Provides derived classes an opportunity to handle changes to the Source property.
/// </summary>
protected virtual void OnSourceChanged(MultiScaleTileSource oldSource, MultiScaleTileSource newSource)
{
if (newSource == null)
{
_spatialSource = null;
return;
}
_spatialSource = new MultiScaleImageSpatialItemsSource(newSource);
if (_itemsControl != null)
{
_itemsControl.ItemsSource = _spatialSource;
}
if (_zoomableCanvas != null)
{
InitializeCanvas();
}
}
public VisualTile(Tile tile, MultiScaleTileSource tileSource, ImageSource source)
: this(tile, tileSource)
{
Source = source;
}