private void refreshScalebar()
{
if (Map == null || double.IsNaN(Map.Resolution))
{
this.Visibility = Visibility.Collapsed;
return;
}
ScaleBarUnit outUnit = ScaleBarUnit.Undefined;
double outResolution;
#region KiloMeters/Meters
double roundedKiloMeters = getBestEstimateOfValue(Map.Resolution, ScaleBarUnit.Kilometers, out outUnit, out outResolution);
double widthMeters = roundedKiloMeters / outResolution;
bool inMeters = outUnit == ScaleBarUnit.Meters;
if (PaddingLeftForScaleBarTextMeters != null)
{
PaddingLeftForScaleBarTextMeters.Width = widthMeters;
}
if (PaddingLeftTopNotch != null)
{
PaddingLeftTopNotch.Width = widthMeters;
}
if (ScaleBarTextForMeters != null)
{
ScaleBarTextForMeters.Text = string.Format("{0}{1}", roundedKiloMeters, (inMeters ? "m" : "km"));
ScaleBarTextForMeters.Width = widthMeters;
}
#endregion
#region Miles
double roundedMiles = getBestEstimateOfValue(Map.Resolution, ScaleBarUnit.Miles, out outUnit, out outResolution);
double widthMiles = roundedMiles / outResolution;
bool inFeet = outUnit == ScaleBarUnit.Feet;
if (PaddingLeftForScaleBarTextMiles != null)
{
PaddingLeftForScaleBarTextMiles.Width = widthMiles;
}
if (PaddingLeftBottomNotch != null)
{
PaddingLeftBottomNotch.Width = widthMiles;
}
if (ScaleBarTextForMiles != null)
{
ScaleBarTextForMiles.Text = string.Format("{0}{1}", roundedMiles, inFeet ? "ft" : "mi");
ScaleBarTextForMiles.Width = widthMiles;
}
#endregion
double widthOfNotches = 4; // 2 for left notch, 2 for right notch
double scaleBarBlockWidth = (widthMiles > widthMeters) ? widthMiles : widthMeters;
scaleBarBlockWidth += widthOfNotches;
this.Visibility = roundedMiles == double.NaN || roundedKiloMeters == double.NaN ? Visibility.Collapsed : Visibility.Visible;
if (!double.IsNaN(scaleBarBlockWidth) && ScaleBarBlock != null)
{
ScaleBarBlock.Width = scaleBarBlockWidth;
}
}
/// <summary>
/// Constructor
/// </summary>
public LayoutScaleBar()
{
Name = "Scale Bar";
_font = new Font("Arial", 10);
_color = Color.Black;
_unit = ScaleBarUnit.Kilometers;
_unitText = "km";
_numBreaks = 4;
_textHint = TextRenderingHint.AntiAliasGridFit;
ResizeStyle = ResizeStyle.HandledInternally;
}
public double ConvertDistance(double distance, ScaleBarUnit toUnits)
{
double mDistance = distance;
if (toUnits == ScaleBarUnit.Miles)
{
mDistance = distance / 1.60934;
}
else if (toUnits == ScaleBarUnit.Feet)
{
mDistance = distance * 3000.280839895;
}
else if (toUnits == ScaleBarUnit.Meters)
{
mDistance = distance * 1000;
}
return(mDistance);
}
private double GetBestEstimateOfValue(double resolution, ScaleBarUnit displayUnit, out ScaleBarUnit unit, out double outResolution)
{
unit = displayUnit;
double rounded = 0;
double originalRes = resolution;
while (rounded < 0.5)
{
resolution = originalRes;
if (MapUnit == ScaleBarUnit.DecimalDegrees)
{
resolution = GetResolutionForGeographic(Map.Extent.GetCenter(), resolution);
resolution = resolution * (int)ScaleBarUnit.Meters / (int)unit;
}
else if (webMercSref.Equals(Map.SpatialReference))
{
//WebMercator
MapPoint center = Map.Extent.GetCenter();
center.X = Math.Min(Math.Max(center.Y, -20037508.3427892), 20037508.3427892);
MapPoint center2 = merc.ToGeographic(new MapPoint(Math.Min(center.X + Map.Resolution, 20037508.3427892), center.Y)) as MapPoint;
center = merc.ToGeographic(center) as MapPoint;
resolution = GetResolutionForGeographic(center, center2.X - center.X);
resolution = resolution * (int)ScaleBarUnit.Meters / (int)unit;
}
else if (MapUnit != ScaleBarUnit.Undefined)
{
resolution = resolution * (int)MapUnit / (int)unit;
}
double val = TargetWidth * resolution;
val = RoundToSignificant(val, resolution);
double noFrac = Math.Round(val); // to get rid of the fraction
if (val < 0.5)
{
ScaleBarUnit newUnit = ScaleBarUnit.Undefined;
// Automatically switch unit to a lower one
if (unit == ScaleBarUnit.Kilometers)
newUnit = ScaleBarUnit.Meters;
else if (unit == ScaleBarUnit.Miles)
newUnit = ScaleBarUnit.Feet;
if (newUnit == ScaleBarUnit.Undefined) { break; } //no lower unit
unit = newUnit;
}
else if (noFrac > 1)
{
rounded = noFrac;
var len = noFrac.ToString().Length;
if (len <= 2)
{
// single/double digits ... make it a multiple of 5 ..or 1,2,3,4
if (noFrac > 5)
{
rounded -= noFrac % 5;
}
while (rounded > 1 && (rounded / resolution) > TargetWidth)
{
// exceeded maxWidth .. decrement by 1 or by 5
double decr = noFrac > 5 ? 5 : 1;
rounded = rounded - decr;
}
}
else if (len > 2)
{
rounded = Math.Round(noFrac / Math.Pow(10, len - 1)) * Math.Pow(10, len - 1);
if ((rounded / resolution) > TargetWidth)
{
// exceeded maxWidth .. use the lower bound instead
rounded = Math.Floor(noFrac / Math.Pow(10, len - 1)) * Math.Pow(10, len - 1);
}
}
}
else
{ // anything between 0.5 and 1
rounded = Math.Floor(val);
if (rounded == 0)
{
//val >= 0.5 but < 1 so round up
rounded = (val == 0.5) ? 0.5 : 1;
if ((rounded / resolution) > TargetWidth)
{
// exceeded maxWidth .. re-try by switching to lower unit
rounded = 0;
ScaleBarUnit newUnit = ScaleBarUnit.Undefined;
// Automatically switch unit to a lower one
if (unit == ScaleBarUnit.Kilometers)
newUnit = ScaleBarUnit.Meters;
else if (unit == ScaleBarUnit.Miles)
newUnit = ScaleBarUnit.Feet;
if (newUnit == ScaleBarUnit.Undefined) { break; } //no lower unit
unit = newUnit;
}
}
}
}
outResolution = resolution;
return rounded;
}
/// <summary>
/// Convert map units to scalebar units
/// </summary>
/// <param name="esriUnits">Map layer units</param>
/// <returns>Scalebar units</returns>
private ScaleBarUnit _ConvertScalebarUnits(ESRI.ArcLogistics.MapService.esriUnits esriUnits)
{
ScaleBarUnit scalebarUnits = ScaleBarUnit.Undefined;
switch (esriUnits)
{
case ESRI.ArcLogistics.MapService.esriUnits.esriUnknownUnits:
{
scalebarUnits = ScaleBarUnit.Undefined;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriInches:
{
scalebarUnits = ScaleBarUnit.Inches;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriFeet:
{
scalebarUnits = ScaleBarUnit.Feet;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriYards:
{
scalebarUnits = ScaleBarUnit.Yards;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriMiles:
{
scalebarUnits = ScaleBarUnit.Miles;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriNauticalMiles:
{
scalebarUnits = ScaleBarUnit.NauticalMiles;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriMillimeters:
{
scalebarUnits = ScaleBarUnit.Millimeters;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriCentimeters:
{
scalebarUnits = ScaleBarUnit.Centimeters;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriMeters:
{
scalebarUnits = ScaleBarUnit.Meters;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriKilometers:
{
scalebarUnits = ScaleBarUnit.Kilometers;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriDecimalDegrees:
{
scalebarUnits = ScaleBarUnit.DecimalDegrees;
break;
}
case ESRI.ArcLogistics.MapService.esriUnits.esriDecimeters:
{
scalebarUnits = ScaleBarUnit.Decimeters;
break;
}
default:
{
Debug.Assert(false);
break;
}
}
return(scalebarUnits);
}
/// <summary>
/// Constructor
/// </summary>
public LayoutScaleBar()
{
Name = "Scale Bar";
_font = new Font("Arial", 10);
_color = Color.Black;
_unit = ScaleBarUnit.Kilometers;
_unitText = "km";
_numBreaks = 4;
_textHint = TextRenderingHint.AntiAliasGridFit;
ResizeStyle = ResizeStyle.HandledInternally;
}
/// <summary>
/// Convert scalebar units to map scalebar units.
/// </summary>
/// <param name="scaleBarUnits">Scalebar units.</param>
/// <returns>Scalebar map units.</returns>
public static ESRI.ArcGIS.Client.ScaleBarUnit ConvertScalebarUnits(ScaleBarUnit scaleBarUnits)
{
ESRI.ArcGIS.Client.ScaleBarUnit mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Undefined;
switch (scaleBarUnits)
{
case ScaleBarUnit.Undefined:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Undefined;
break;
}
case ScaleBarUnit.Inches:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Inches;
break;
}
case ScaleBarUnit.Feet:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Feet;
break;
}
case ScaleBarUnit.Yards:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Yards;
break;
}
case ScaleBarUnit.Miles:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Miles;
break;
}
case ScaleBarUnit.NauticalMiles:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.NauticalMiles;
break;
}
case ScaleBarUnit.Millimeters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Millimeters;
break;
}
case ScaleBarUnit.Centimeters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Centimeters;
break;
}
case ScaleBarUnit.Meters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Meters;
break;
}
case ScaleBarUnit.Kilometers:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Kilometers;
break;
}
case ScaleBarUnit.DecimalDegrees:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.DecimalDegrees;
break;
}
case ScaleBarUnit.Decimeters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Decimeters;
break;
}
default:
{
Debug.Assert(false);
break;
}
}
return(mapScalebarUnits);
}
private double getBestEstimateOfValue(double resolution, ScaleBarUnit displayUnit, out ScaleBarUnit unit, out double outResolution)
{
unit = displayUnit;
double rounded = 0;
double originalRes = resolution;
while (rounded < 0.5)
{
resolution = originalRes;
if (MapUnit == ScaleBarUnit.DecimalDegrees)
{
resolution = getResolutionForGeographic(Map.Extent, resolution);
resolution = resolution * (int)ScaleBarUnit.Meters / (int)unit;
}
else if (MapUnit != ScaleBarUnit.Undefined)
{
resolution = resolution * (int)MapUnit / (int)unit;
}
double val = TargetWidth * resolution;
val = roundToSignificant(val, resolution);
double noFrac = Math.Round(val); // to get rid of the fraction
if (val < 0.5)
{
ScaleBarUnit newUnit = ScaleBarUnit.Undefined;
// Automatically switch unit to a lower one
if (unit == ScaleBarUnit.Kilometers)
{
newUnit = ScaleBarUnit.Meters;
}
else if (unit == ScaleBarUnit.Miles)
{
newUnit = ScaleBarUnit.Feet;
}
if (newUnit == ScaleBarUnit.Undefined)
{
break;
} //no lower unit
unit = newUnit;
}
else if (noFrac > 1)
{
rounded = noFrac;
var len = noFrac.ToString().Length;
if (len <= 2)
{
// single/double digits ... make it a multiple of 5 ..or 1,2,3,4
if (noFrac > 5)
{
rounded -= noFrac % 5;
}
while (rounded > 1 && (rounded / resolution) > TargetWidth)
{
// exceeded maxWidth .. decrement by 1 or by 5
double decr = noFrac > 5 ? 5 : 1;
rounded = rounded - decr;
}
}
else if (len > 2)
{
rounded = Math.Round(noFrac / Math.Pow(10, len - 1)) * Math.Pow(10, len - 1);
if ((rounded / resolution) > TargetWidth)
{
// exceeded maxWidth .. use the lower bound instead
rounded = Math.Floor(noFrac / Math.Pow(10, len - 1)) * Math.Pow(10, len - 1);
}
}
}
else
{ // anything between 0.5 and 1
rounded = Math.Floor(val);
if (rounded == 0)
{
//val >= 0.5 but < 1 so round up
rounded = (val == 0.5) ? 0.5 : 1;
if ((rounded / resolution) > TargetWidth)
{
// exceeded maxWidth .. re-try by switching to lower unit
rounded = 0;
ScaleBarUnit newUnit = ScaleBarUnit.Undefined;
// Automatically switch unit to a lower one
if (unit == ScaleBarUnit.Kilometers)
{
newUnit = ScaleBarUnit.Meters;
}
else if (unit == ScaleBarUnit.Miles)
{
newUnit = ScaleBarUnit.Feet;
}
if (newUnit == ScaleBarUnit.Undefined)
{
break;
} //no lower unit
unit = newUnit;
}
}
}
}
outResolution = resolution;
return(rounded);
}
private void refreshScalebar()
{
Visibility viz = Visibility.Visible;
if (Map == null || double.IsNaN(Map.Resolution) ||
MapUnit == ScaleBarUnit.DecimalDegrees && Math.Abs(Map.Extent.GetCenter().Y) >= 90)
{
viz = Visibility.Collapsed;
}
if (LayoutRoot != null)
{
LayoutRoot.Visibility = viz;
}
if (viz == Visibility.Collapsed)
{
return;
}
ScaleBarUnit outUnit = ScaleBarUnit.Undefined;
double outResolution;
#region KiloMeters/Meters
double roundedKiloMeters = getBestEstimateOfValue(Map.Resolution, ScaleBarUnit.Kilometers, out outUnit, out outResolution);
double widthMeters = roundedKiloMeters / outResolution;
bool inMeters = outUnit == ScaleBarUnit.Meters;
if (PaddingLeftForScaleBarTextMeters != null)
{
PaddingLeftForScaleBarTextMeters.Width = widthMeters;
}
if (PaddingLeftTopNotch != null)
{
PaddingLeftTopNotch.Width = widthMeters;
}
if (ScaleBarTextForMeters != null)
{
ScaleBarTextForMeters.Text = string.Format("{0}{1}", roundedKiloMeters, (inMeters ? "m" : "km"));
ScaleBarTextForMeters.Width = widthMeters;
}
#endregion
#region Miles
double roundedMiles = getBestEstimateOfValue(Map.Resolution, ScaleBarUnit.Miles, out outUnit, out outResolution);
double widthMiles = roundedMiles / outResolution;
bool inFeet = outUnit == ScaleBarUnit.Feet;
if (PaddingLeftForScaleBarTextMiles != null)
{
PaddingLeftForScaleBarTextMiles.Width = widthMiles;
}
if (PaddingLeftBottomNotch != null)
{
PaddingLeftBottomNotch.Width = widthMiles;
}
if (ScaleBarTextForMiles != null)
{
ScaleBarTextForMiles.Text = string.Format("{0}{1}", roundedMiles, inFeet ? "ft" : "mi");
ScaleBarTextForMiles.Width = widthMiles;
}
#endregion
double widthOfNotches = 4; // 2 for left notch, 2 for right notch
double scaleBarBlockWidth = (widthMiles > widthMeters) ? widthMiles : widthMeters;
scaleBarBlockWidth += widthOfNotches;
if (!double.IsNaN(scaleBarBlockWidth) && ScaleBarBlock != null)
{
ScaleBarBlock.Width = scaleBarBlockWidth;
}
}
/// <summary>
/// Convert scalebar units to map scalebar units.
/// </summary>
/// <param name="scaleBarUnits">Scalebar units.</param>
/// <returns>Scalebar map units.</returns>
public static ESRI.ArcGIS.Client.ScaleBarUnit ConvertScalebarUnits(ScaleBarUnit scaleBarUnits)
{
ESRI.ArcGIS.Client.ScaleBarUnit mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Undefined;
switch (scaleBarUnits)
{
case ScaleBarUnit.Undefined:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Undefined;
break;
}
case ScaleBarUnit.Inches:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Inches;
break;
}
case ScaleBarUnit.Feet:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Feet;
break;
}
case ScaleBarUnit.Yards:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Yards;
break;
}
case ScaleBarUnit.Miles:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Miles;
break;
}
case ScaleBarUnit.NauticalMiles:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.NauticalMiles;
break;
}
case ScaleBarUnit.Millimeters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Millimeters;
break;
}
case ScaleBarUnit.Centimeters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Centimeters;
break;
}
case ScaleBarUnit.Meters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Meters;
break;
}
case ScaleBarUnit.Kilometers:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Kilometers;
break;
}
case ScaleBarUnit.DecimalDegrees:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.DecimalDegrees;
break;
}
case ScaleBarUnit.Decimeters:
{
mapScalebarUnits = ESRI.ArcGIS.Client.ScaleBarUnit.Decimeters;
break;
}
default:
{
Debug.Assert(false);
break;
}
}
return mapScalebarUnits;
}
