protected void UpdateImage()
{
updateTimer.Stop();
if (updateInProgress)
{
updateTimer.Start(); // update image on next timer tick
}
else if (ParentMap != null && ParentMap.RenderSize.Width > 0 && ParentMap.RenderSize.Height > 0)
{
updateInProgress = true;
var relativeSize = Math.Max(RelativeImageSize, 1d);
var width = ParentMap.RenderSize.Width * relativeSize;
var height = ParentMap.RenderSize.Height * relativeSize;
var dx = (ParentMap.RenderSize.Width - width) / 2d;
var dy = (ParentMap.RenderSize.Height - height) / 2d;
var loc1 = ParentMap.ViewportPointToLocation(new Point(dx, dy));
var loc2 = ParentMap.ViewportPointToLocation(new Point(dx + width, dy));
var loc3 = ParentMap.ViewportPointToLocation(new Point(dx, dy + height));
var loc4 = ParentMap.ViewportPointToLocation(new Point(dx + width, dy + height));
var west = Math.Min(loc1.Longitude, Math.Min(loc2.Longitude, Math.Min(loc3.Longitude, loc4.Longitude)));
var east = Math.Max(loc1.Longitude, Math.Max(loc2.Longitude, Math.Max(loc3.Longitude, loc4.Longitude)));
var south = Math.Min(loc1.Latitude, Math.Min(loc2.Latitude, Math.Min(loc3.Latitude, loc4.Latitude)));
var north = Math.Max(loc1.Latitude, Math.Max(loc2.Latitude, Math.Max(loc3.Latitude, loc4.Latitude)));
if (!double.IsNaN(MinLongitude) && west < MinLongitude)
{
west = MinLongitude;
}
if (!double.IsNaN(MaxLongitude) && east > MaxLongitude)
{
east = MaxLongitude;
}
if (!double.IsNaN(MinLatitude) && south < MinLatitude)
{
south = MinLatitude;
}
if (!double.IsNaN(MaxLatitude) && north > MaxLatitude)
{
north = MaxLatitude;
}
var p1 = ParentMap.MapTransform.Transform(new Location(south, west));
var p2 = ParentMap.MapTransform.Transform(new Location(north, east));
UpdateImage(new BoundingBox(west, east, south, north),
(int)Math.Round((p2.X - p1.X) * ParentMap.ViewportScale),
(int)Math.Round((p2.Y - p1.Y) * ParentMap.ViewportScale));
}
}
protected void UpdateImage()
{
if (updateInProgress)
{
updateTimer.Start(); // update image on next timer tick
}
else
{
updateTimer.Stop();
if (ParentMap != null && RenderSize.Width > 0 && RenderSize.Height > 0)
{
updateInProgress = true;
var relativeSize = Math.Max(RelativeImageSize, 1d);
var width = RenderSize.Width * relativeSize;
var height = RenderSize.Height * relativeSize;
var dx = (RenderSize.Width - width) / 2d;
var dy = (RenderSize.Height - height) / 2d;
var loc1 = ParentMap.ViewportPointToLocation(new Point(dx, dy));
var loc2 = ParentMap.ViewportPointToLocation(new Point(dx + width, dy));
var loc3 = ParentMap.ViewportPointToLocation(new Point(dx, dy + height));
var loc4 = ParentMap.ViewportPointToLocation(new Point(dx + width, dy + height));
var west = Math.Min(loc1.Longitude, Math.Min(loc2.Longitude, Math.Min(loc3.Longitude, loc4.Longitude)));
var east = Math.Max(loc1.Longitude, Math.Max(loc2.Longitude, Math.Max(loc3.Longitude, loc4.Longitude)));
var south = Math.Min(loc1.Latitude, Math.Min(loc2.Latitude, Math.Min(loc3.Latitude, loc4.Latitude)));
var north = Math.Max(loc1.Latitude, Math.Max(loc2.Latitude, Math.Max(loc3.Latitude, loc4.Latitude)));
var p1 = ParentMap.MapTransform.Transform(new Location(south, west));
var p2 = ParentMap.MapTransform.Transform(new Location(north, east));
width = Math.Round((p2.X - p1.X) * ParentMap.ViewportScale);
height = Math.Round((p2.Y - p1.Y) * ParentMap.ViewportScale);
var image = GetBitmap(west, east, south, north, (int)width, (int)height);
UpdateImage(west, east, south, north, image);
}
}
}
private void UpdateImage(object sender, EventArgs e)
{
if (updateInProgress)
{
return; // update image on next timer tick
}
updateTimer.Stop();
if (ParentMap != null && ActualWidth > 0 && ActualHeight > 0)
{
updateInProgress = true;
var relativeSize = Math.Max(RelativeImageSize, 1d);
var width = ActualWidth * relativeSize;
var height = ActualHeight * relativeSize;
var dx = (ActualWidth - width) / 2d;
var dy = (ActualHeight - height) / 2d;
var loc1 = ParentMap.ViewportPointToLocation(new Point(dx, dy));
var loc2 = ParentMap.ViewportPointToLocation(new Point(width, dy));
var loc3 = ParentMap.ViewportPointToLocation(new Point(dx, height));
var loc4 = ParentMap.ViewportPointToLocation(new Point(width, height));
ThreadPool.QueueUserWorkItem(o =>
{
var west = Math.Min(loc1.Longitude, Math.Min(loc2.Longitude, Math.Min(loc3.Longitude, loc4.Longitude)));
var east = Math.Max(loc1.Longitude, Math.Max(loc2.Longitude, Math.Max(loc3.Longitude, loc4.Longitude)));
var south = Math.Min(loc1.Latitude, Math.Min(loc2.Latitude, Math.Min(loc3.Latitude, loc4.Latitude)));
var north = Math.Max(loc1.Latitude, Math.Max(loc2.Latitude, Math.Max(loc3.Latitude, loc4.Latitude)));
var image = GetImage(west, east, south, north, (int)Math.Round(width), (int)Math.Round(height));
Dispatcher.BeginInvoke((Action)(() => UpdateImage(west, east, south, north, image)));
updateInProgress = false;
});
}
}