private void CalculateStartViewBounds(Size size)
{
if (this._cacheBounds != null && this._origin == null)
{
Utility.Rectangle2D bounds = this._cacheBounds;
double width = size.Width;
double height = size.Height;
double resWidth = bounds.Width / width;
double resHeight = bounds.Height / height;
_mapResolution = (resHeight > resWidth) ? resHeight : resWidth;
_origin = new Utility.Point2D(bounds.Center.X - width * 0.5 * _mapResolution, bounds.Center.Y + height * 0.5 * _mapResolution);
_cacheBounds = new Utility.Rectangle2D(this.ViewBounds);
SetOriginAndResolution(_mapResolution, new Utility.Point2D(_origin));
}
}
private Utility.Rectangle2D GetFullViewBounds()
{
if (double.IsNaN(this._mapResolution))
{
return null;
}
Utility.Point2D point = Screen2Map(new Point(0.0, 0.0));
Utility.Point2D point2 = Screen2Map(new Point(0.0, _currentSize.Height));
Utility.Point2D point3 = Screen2Map(new Point(_currentSize.Width, _currentSize.Height));
Utility.Point2D point4 = Screen2Map(new Point(_currentSize.Width, 0.0));
if (point == null || point2 == null || point3 == null || point4 == null)
{
return null;
}
Utility.Rectangle2D pointBounds = new Utility.Rectangle2D(point, point);
Utility.Rectangle2D point2Bounds = new Utility.Rectangle2D(point2, point2);
Utility.Rectangle2D point3Bounds = new Utility.Rectangle2D(point3, point3);
Utility.Rectangle2D point4Bounds = new Utility.Rectangle2D(point4, point4);
Utility.Rectangle2D bounds = pointBounds;
bounds.Union(point2Bounds);
bounds.Union(point3Bounds);
bounds.Union(point4Bounds);
return bounds;
}
private void Layers_LayersInitialized(object sender, EventArgs e)
{
if (_origin == null)
{
Utility.Rectangle2D bounds = this.Bounds;
if (bounds.IsEmpty)
{
return;
}
if (ViewBounds != null)
{
bounds = ViewBounds;
}
_cacheBounds = bounds;
if ((_currentSize.Width == 0.0) || (_currentSize.Height == 0.0))
{
base.Dispatcher.BeginInvoke(delegate { this.Layers_LayersInitialized(sender, e); });
return;
}
}
this.CalculateStartViewBounds(_currentSize);
foreach (Layer layer in this.Layers)
{
this.AssignLayerContainer(layer);
}
this.LoadLayersInView(false, this.GetFullViewBounds());
}
