protected override void OnPaintOffScreen(PaintEventArgs e)
{
PolarGraphics f = base.CreatePolarGraphics(e.Graphics);
// What altitude are we drawing?
#if PocketPC
Distance AltitudeToRender = _Altitude;
#else
Distance AltitudeToRender = new Distance(_ValueInterpolator[_InterpolationIndex], _Altitude.Units);
#endif
// There are 100 tick marks in 360 degrees. 3.6° per tick mark
double ConversionFactor = 3.6;
// Draw tick marks
if (_MinorTickPen != null)
{
for (double alt = 0; alt < 100; alt += 1)
{
// Convert the speed to an angle
Angle angle = new Angle(alt * ConversionFactor);
// Get the coordinate of the line's start
PolarCoordinate start = new PolarCoordinate(95, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
PolarCoordinate end = new PolarCoordinate(100, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
// And draw a line
f.DrawLine(_MinorTickPen, start, end);
}
}
// Draw tick marks
if (_MajorTickPen != null)
{
for (double alt = 0; alt < 100; alt += 10)
{
// Convert the speed to an angle
Angle angle = new Angle(alt * ConversionFactor);
// Get the coordinate of the line's start
PolarCoordinate start = new PolarCoordinate(94, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
PolarCoordinate end = new PolarCoordinate(100, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
// And draw a line
f.DrawLine(_MajorTickPen, start, end);
// And also a string
string s = Convert.ToString(alt * 0.1, CultureInfo.CurrentCulture);
f.DrawCenteredString(s, _AltitudeLabelFont, _AltitudeLabelBrush,
new PolarCoordinate(85, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise));
}
}
// Calculate all needle values
double pTensOfThousandsValue = AltitudeToRender.Value / 1000.0;
double pThousandsValue = AltitudeToRender.Value / 100.0;
double pValue = AltitudeToRender.Value / 10.0;
// Now draw the tens-of-thousands needle
// Rotate the needle to the right place
PolarCoordinate[] Needle1 = new PolarCoordinate[_TensOfThousandsNeedle.Length];
for (int index = 0; index < Needle1.Length; index++)
{
Needle1[index] = _TensOfThousandsNeedle[index].Rotate(pTensOfThousandsValue * ConversionFactor);
}
// Now draw the tens-of-thousands needle
// Rotate the needle to the right place
PolarCoordinate[] Needle2 = new PolarCoordinate[_ThousandsNeedle.Length];
for (int index = 0; index < Needle2.Length; index++)
{
Needle2[index] = _ThousandsNeedle[index].Rotate(pThousandsValue * ConversionFactor);
}
// Now draw the tens-of-Hundreds needle
// Rotate the needle to the right place
PolarCoordinate[] Needle3 = new PolarCoordinate[_HundredsNeedle.Length];
for (int index = 0; index < Needle3.Length; index++)
{
Needle3[index] = _HundredsNeedle[index].Rotate(pValue * ConversionFactor);
}
string AltitudeString = AltitudeToRender.ToString(_ValueFormat, CultureInfo.CurrentCulture);
//SizeF FontSize = f.Graphics.MeasureString(AltitudeString, pValueFont);
#if PocketPC
f.DrawCenteredString(AltitudeString, _ValueFont,
_ValueBrush, new PolarCoordinate(45.0f, 0.0, Azimuth.North, PolarCoordinateOrientation.Clockwise));
#else
f.DrawRotatedString(AltitudeString, _ValueFont,
_ValueBrush, new PolarCoordinate(45.0f, Angle.Empty, Azimuth.North, PolarCoordinateOrientation.Clockwise));
#endif
// Draw an ellipse at the center
f.DrawEllipse(_CenterPen, PolarCoordinate.Empty, 10);
#if !PocketPC
f.Graphics.TranslateTransform(_NeedleShadowSize.Width, _NeedleShadowSize.Height, MatrixOrder.Append);
f.FillPolygon(_NeedleShadowBrush, Needle1);
f.FillPolygon(_NeedleShadowBrush, Needle2);
f.FillPolygon(_NeedleShadowBrush, Needle3);
f.Graphics.ResetTransform();
#endif
f.FillPolygon(_TensOfThousandsBrush, Needle1);
f.DrawPolygon(_TensOfThousandsPen, Needle1);
f.FillPolygon(_ThousandsBrush, Needle2);
f.DrawPolygon(_ThousandsPen, Needle2);
f.FillPolygon(_HundredsBrush, Needle3);
f.DrawPolygon(_HundredsPen, Needle3);
// Draw an ellipse at the center
f.FillEllipse(_HundredsBrush, PolarCoordinate.Empty, 7);
f.DrawEllipse(_HundredsPen, PolarCoordinate.Empty, 7);
}
protected override void OnPaintOffScreen(PaintEventArgs e)
{
PolarGraphics f = CreatePolarGraphics(e.Graphics);
// What bearing are we drawing?
#if PocketPC
Azimuth BearingToRender = _Bearing;
#else
Azimuth BearingToRender;
try
{
BearingToRender = new Azimuth(_ValueInterpolator[_InterpolationIndex]);
}
catch
{
throw;
}
#endif
// Cache drawing options in order to prevent race conditions during
// drawing!
double MinorInterval = _MinorTickInterval.DecimalDegrees;
double MajorInterval = _MajorTickInterval.DecimalDegrees;
double DirectionInterval = _DirectionLabelInterval.DecimalDegrees;
double AngleInterval = _AngleLabelInterval.DecimalDegrees;
// Draw tick marks
if (MinorInterval > 0)
{
for (double angle = 0; angle < 360; angle += MinorInterval)
{
// And draw a line
f.DrawLine(_MinorTickPen, new PolarCoordinate(98, angle), new PolarCoordinate(100, angle));
}
}
// Draw tick marks
if (MajorInterval > 0)
{
for (double angle = 0; angle < 360; angle += MajorInterval)
{
// And draw a line
f.DrawLine(_MajorTickPen, new PolarCoordinate(95, angle), new PolarCoordinate(100, angle));
}
}
if (DirectionInterval > 0)
{
for (double angle = 0; angle < 360; angle += DirectionInterval)
{
// And draw a line
f.DrawLine(_DirectionTickPen, new PolarCoordinate(92, angle), new PolarCoordinate(100, angle));
}
}
if (AngleInterval > 0)
{
for (double angle = 0; angle < 360; angle += AngleInterval)
{
// Get the coordinate of the line's start
PolarCoordinate start = new PolarCoordinate(60, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
#if PocketPC
f.DrawCenteredString(((Angle)angle).ToString(_AngleLabelFormat, CultureInfo.CurrentCulture), _AngleLabelFont, _AngleLabelBrush, start);
#else
f.DrawRotatedString(((Angle)angle).ToString(_AngleLabelFormat, CultureInfo.CurrentCulture), _AngleLabelFont, _AngleLabelBrush, start);
#endif
}
}
if (DirectionInterval > 0)
{
for (double angle = 0; angle < 360; angle += DirectionInterval)
{
// Get the coordinate of the line's start
PolarCoordinate start = new PolarCoordinate(80, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
#if PocketPC
f.DrawCenteredString(((Azimuth)angle).ToString("c", CultureInfo.CurrentCulture), _DirectionLabelFont, _DirectionLabelBrush, start);
#else
f.DrawRotatedString(((Azimuth)angle).ToString("c", CultureInfo.CurrentCulture), _DirectionLabelFont, _DirectionLabelBrush, start);
#endif
}
}
// Draw an ellipse at the center
f.DrawEllipse(_CenterPen, PolarCoordinate.Empty, 10);
// Now draw the needle shadow
PolarCoordinate[] NeedleNorth = NeedlePointsNorth.Clone() as PolarCoordinate[];
PolarCoordinate[] NeedleSouth = NeedlePointsSouth.Clone() as PolarCoordinate[];
// Adjust the needle to the current bearing
for (int index = 0; index < NeedleNorth.Length; index++)
{
NeedleNorth[index] = NeedleNorth[index].Rotate(BearingToRender.DecimalDegrees);
NeedleSouth[index] = NeedleSouth[index].Rotate(BearingToRender.DecimalDegrees);
}
#if !PocketPC
// Now draw a shadow
f.Graphics.TranslateTransform(pNeedleShadowSize.Width, pNeedleShadowSize.Height, MatrixOrder.Append);
f.FillPolygon(pNeedleShadowBrush, NeedleNorth);
f.FillPolygon(pNeedleShadowBrush, NeedleSouth);
f.Graphics.ResetTransform();
#endif
f.FillPolygon(pNorthNeedleBrush, NeedleNorth);
f.DrawPolygon(pNorthNeedlePen, NeedleNorth);
f.FillPolygon(pSouthNeedleBrush, NeedleSouth);
f.DrawPolygon(pSouthNeedlePen, NeedleSouth);
}
