/// <summary>
/// Adds map element to the new layout.
/// </summary>
/// <param name="mapScale">The map scale.</param>
/// <param name="extents">The extents.</param>
private void AddMapElement(int mapScale, IEnvelope extents)
{
var map = _context.Map;
var mapElement = new LayoutMap();
mapElement.Initialize(map, View.LayoutControl);
mapElement.IsMain = true;
mapElement.TileProvider = _context.Map.TileProvider;
mapElement.LocationF = new PointF(PrintingConstants.DefaultMapOffset, PrintingConstants.DefaultMapOffset);
mapElement.DrawTiles = map.Tiles.Visible;
// calc the necessary size in paper coordinates
GeoSize size;
if (map.GetGeodesicSize(extents, out size))
{
mapElement.SizeF = LayoutScaleHelper.CalcMapSize(mapScale, size, extents.Width / extents.Height);
mapElement.Envelope = extents.Clone();
mapElement.Initialized = true;
View.LayoutControl.AddToLayout(mapElement);
View.LayoutControl.UpdateLayout();
View.LayoutControl.ZoomFitToScreen();
}
}
/// <summary>
/// Calculates canvas size in pixels.
/// </summary>
private bool CalculateCanvasSize(out SizeF size)
{
size = default(SizeF);
var extents = View.MapExtents;
GeoSize geoSize;
if (!_context.Map.GetGeodesicSize(extents, out geoSize))
{
return(false);
}
if (!NumericHelper.Equal(View.MapScale, 0.0))
{
size = LayoutScaleHelper.CalcMapSize(View.MapScale, geoSize, extents.Width / extents.Height);
}
return(true);
}
/// <summary>
/// Called when fit to page is clicked.
/// </summary>
private void FitToPage()
{
GeoSize geoSize;
if (_context.Map.GetGeodesicSize(View.MapExtents, out geoSize))
{
var size = GetUsablePaperSize();
if (size == default(SizeF))
{
return;
}
size.Width -= PrintingConstants.DefaultMapOffset * 2;
size.Height -= PrintingConstants.DefaultMapOffset * 2;
// let's adjust the size according to XY ratio,
// since geodesic scale may differ along the axis
double ratio = size.Width / size.Height;
double ratio2 = View.MapExtents.Width / View.MapExtents.Height;
if (ratio > ratio2)
{
size.Width /= (float)(ratio / ratio2);
}
else if (ratio < ratio2)
{
size.Height /= (float)(ratio2 / ratio);
}
double val = LayoutScaleHelper.CalcMapScale(geoSize, size, Enums.ScaleType.Average);
int scale = Convert.ToInt32(val);
if (scale == 0)
{
// it's probably an empty map, but let's display something all the same
scale = 1;
}
View.PopulateScales(scale);
}
}