private void CollectItems()
{
foreach (UIElement element in this.Children)
{
MapCanvasItem item = null;
int hash = element.GetHashCode();
if (!this.internalItems.TryGetValue(hash, out item))
{
item = this.PrepareItem(element);
this.internalItems.Add(hash, item);
}
}
}
internal void SetItemPosition(MapCanvasItem canvasItem, Point point)
{
if (!MapCanvas.VerifyPointIsValid(point))
{
return;
}
double width = canvasItem.Item.DesiredSize.Width;
double height = canvasItem.Item.DesiredSize.Height;
if (!double.IsNaN(width) && !double.IsNaN(height) &&
!double.IsInfinity(width) && !double.IsInfinity(height) &&
(width > 0 || height > 0))
{
canvasItem.Item.Arrange(new Rect(point, new Size(Math.Ceiling(width), Math.Ceiling(height))));
}
}
/// <summary>
/// Arrange item in canvas.
/// </summary>
/// <param name="item">Item to arrange.</param>
internal void ArrangeItem(UIElement element)
{
MapCanvasItem item = null;
this.internalItems.TryGetValue(element.GetHashCode(), out item);
if (item != null)
{
Location location = MapLayer.GetLocation(element);
if (location.IsEmpty)
{
return;
}
ICoordinateService coordinateService = CoordinateServiceProvider.GetService(this.Map);
Point pixel = coordinateService.GeographicToPixel(location);
this.SetItemPosition(item, pixel);
}
}
