public DefaultMapScaleBar(MapViewPosition mapViewPosition, MapViewDimension mapViewDimension, IGraphicFactory graphicFactory, DisplayModel displayModel) : base(mapViewPosition, mapViewDimension, displayModel, graphicFactory, BITMAP_WIDTH, BITMAP_HEIGHT)
{
this.scaleBarMode = ScaleBarMode.BOTH;
this.secondaryDistanceUnitAdapter = ImperialUnitAdapter.INSTANCE;
this.paintScaleBar = CreateScaleBarPaint(Color.BLACK, STROKE_INTERNAL, Style.FILL);
this.paintScaleBarStroke = CreateScaleBarPaint(Color.WHITE, STROKE_EXTERNAL, Style.STROKE);
this.paintScaleText = CreateTextPaint(Color.BLACK, 0, Style.FILL);
this.paintScaleTextStroke = CreateTextPaint(Color.WHITE, 2, Style.STROKE);
}
public MapScaleBar(MapViewPosition mapViewPosition, MapViewDimension mapViewDimension, DisplayModel displayModel, IGraphicFactory graphicFactory, int width, int height)
{
this.mapViewPosition = mapViewPosition;
this.mapViewDimension = mapViewDimension;
this.displayModel = displayModel;
this.graphicFactory = graphicFactory;
this.mapScaleBitmap = graphicFactory.CreateBitmap((int)(width * this.displayModel.ScaleFactor), (int)(height * this.displayModel.ScaleFactor));
this.marginHorizontal = DEFAULT_HORIZONTAL_MARGIN;
this.marginVertical = DEFAULT_VERTICAL_MARGIN;
this.scaleBarPosition = DEFAULT_SCALE_BAR_POSITION;
this.mapScaleCanvas = graphicFactory.CreateCanvas();
this.mapScaleCanvas.Bitmap = this.mapScaleBitmap;
this.distanceUnitAdapter = MetricUnitAdapter.INSTANCE;
this.visible = true;
this.redrawNeeded = true;
}
/// <summary>
/// Calculates the required length and value of the scalebar
/// </summary>
/// <param name="unitAdapter">
/// the DistanceUnitAdapter to calculate for </param>
/// <returns> a <seealso cref="ScaleBarLengthAndValue"/> object containing the required scaleBarLength and scaleBarValue </returns>
protected internal virtual ScaleBarLengthAndValue CalculateScaleBarLengthAndValue(DistanceUnitAdapter unitAdapter)
{
this.prevMapPosition = this.mapViewPosition.MapPosition;
double groundResolution = MercatorProjection.CalculateGroundResolution(this.prevMapPosition.LatLong.Latitude, MercatorProjection.GetMapSize(this.prevMapPosition.ZoomLevel, this.displayModel.TileSize));
groundResolution = groundResolution / unitAdapter.MeterRatio;
int[] scaleBarValues = unitAdapter.ScaleBarValues;
int scaleBarLength = 0;
int mapScaleValue = 0;
for (int i = 0; i < scaleBarValues.Length; ++i)
{
mapScaleValue = scaleBarValues[i];
scaleBarLength = (int)(mapScaleValue / groundResolution);
if (scaleBarLength < (this.mapScaleBitmap.Width - 10))
{
break;
}
}
return(new ScaleBarLengthAndValue(scaleBarLength, mapScaleValue));
}
