/// <inheritdocs/>
protected override void OnPaintOffScreen(PaintEventArgs e)
{
PolarGraphics f = CreatePolarGraphics(e.Graphics);
// What bearing are we drawing?
#if PocketPC
Azimuth BearingToRender = _Bearing;
#else
Azimuth bearingToRender = new Azimuth(_valueInterpolator[_interpolationIndex]);
#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
if (needleNorth != null)
{
for (int index = 0; index < needleNorth.Length; index++)
{
needleNorth[index] = needleNorth[index].Rotate(bearingToRender.DecimalDegrees);
if (needleSouth != null)
{
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);
}
/// <summary>
/// This method is called whenever the control must be rendered. All rendering takes
/// place off-screen, which prevents flickering. The "PolarControl" base class automatically
/// handles tasks such as resizing and smoothing. All you have to be concerned with is
/// calculating the polar coordinates to draw.
/// </summary>
/// <param name="e"></param>
protected override void OnPaintOffScreen(PaintEventArgs e)
{
/* The DotSpatial.Positioning comes with a special class named "PolarGraphics," which works
* almost identically to the "Graphics" class, except that coordinates are given
* in polar form instead of (X, Y).
*
* Polar coordinates are given as an angle and a radius. The angle is between 0°
* and 360° clockwise from the top of the control. The radius is zero (0) at the
* center of the control, and 100 at the outer edge. So, a polar coordinate of 90°
* with a radius of 50 would mark a point straight to the right, half way to the
* edge. Mastering polar coordinates gives you the opportunity to create your
* own controls.
*/
// Make a PolarGraphics class for easier drawing using polar coordinates
PolarGraphics f = CreatePolarGraphics(e.Graphics);
#region Drawing of Tick Marks
// Draw sixty small tick marks around the control
for (double value = 0; value < 60; value += 1)
{
// There are 120 tick marks in 360°
Angle angle = new Angle(value * (360 / 60));
// Get the coordinate of the line's start and end
PolarCoordinate start = new PolarCoordinate(96, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
PolarCoordinate end = new PolarCoordinate(100, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
// And draw a line
f.DrawLine(_pMinorTickPen, start, end);
}
// Draw twelve tick marks
for (double value = 1; value <= 12; value += 1)
{
// Convert the value to an angle
Angle angle = new Angle(value * (360 / 12));
// Get the coordinate of the line's start
PolarCoordinate start = new PolarCoordinate(93, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
PolarCoordinate end = new PolarCoordinate(100, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise);
// And draw the tick mark
f.DrawLine(_pMajorTickPen, start, end);
// Label the clock position around the circle
if (_pHoursFont != null)
{
string s = Convert.ToString(value, CultureInfo.CurrentUICulture);
f.DrawCenteredString(s, _pHoursFont, _pValueLabelBrush,
new PolarCoordinate(85, angle, Azimuth.North, PolarCoordinateOrientation.Clockwise));
}
}
#endregion
/* In order to make the control more appealing, we'll make the hours, minutes, and
* seconds hand as accurate as possible. For example, if the time is 5:30, the hours
* hand should be halfway between 5 and 6, or 5.5. To get these values, we'll
* calculate "fractional" hours, minutes and seconds using the TimeSpan structure.
*
* when you look at the control, you'll see that the minutes hand moves slowly but
* smoothly as time progresses. With smoothing enabled, you almost can't tell it's
* actually moving.
*/
// Calculate the time elapsed since midnight
DateTime midnight = new DateTime(_pValue.Year, _pValue.Month, _pValue.Day);
TimeSpan timeSinceMidnight = _pValue.Subtract(midnight);
#region Drawing of Hours
// There are twelve hours in 360° of a circle
Angle hourAngle = new Angle(timeSinceMidnight.TotalHours * (360 / 12));
// Draw the hour "needle"
f.DrawLine(_pHoursPen, PolarCoordinate.Center,
new PolarCoordinate(30, hourAngle, Azimuth.North, PolarCoordinateOrientation.Clockwise));
#endregion
#region Drawing of Minutes
// There are sixty minutes in 360° of a circle
Angle minuteAngle = new Angle(timeSinceMidnight.TotalMinutes * (360 / 60));
// Draw the Minute "needle"
f.DrawLine(_pMinutesPen, PolarCoordinate.Center,
new PolarCoordinate(80, minuteAngle, Azimuth.North, PolarCoordinateOrientation.Clockwise));
#endregion
#region Drawing of Seconds
// There are sixty seconds in 360° of a circle
Angle secondAngle = new Angle(timeSinceMidnight.TotalSeconds * (360 / 60));
// Draw the Seconds "needle"
f.DrawLine(_pSecondsPen, PolarCoordinate.Center,
new PolarCoordinate(90, secondAngle, Azimuth.North, PolarCoordinateOrientation.Clockwise));
#endregion
}
/// <inheritdocs/>
protected override void OnPaintOffScreen(PaintEventArgs e)
{
PolarGraphics f = CreatePolarGraphics(e.Graphics);
// What altitude are we drawing?
#if PocketPC
Speed SpeedToRender = pSpeed;
#else
Speed speedToRender = new Speed(_valueInterpolator[_interpolationIndex], _pSpeed.Units);
#endif
// Cache drawing intervals and such to prevent a race condition
double minorInterval = _pMinorTickInterval.Value;
double majorInterval = _pMajorTickInterval.Value;
double cachedSpeedLabelInterval = _pSpeedLabelInterval.ToUnitType(_pMaximumSpeed.Units).Value;
Speed maxSpeed = _pMaximumSpeed.Clone();
double minorStep = _pMinorTickInterval.ToUnitType(_pMaximumSpeed.Units).Value;
double majorStep = _pMajorTickInterval.ToUnitType(_pMaximumSpeed.Units).Value;
// Draw tick marks
double angle;
PolarCoordinate start;
PolarCoordinate end;
#region Draw minor tick marks
if (minorInterval > 0)
{
for (double speed = 0; speed < maxSpeed.Value; speed += minorStep)
{
// Convert the speed to an angle
angle = speed * _conversionFactor + _pMinimumAngle.DecimalDegrees;
// Get the coordinate of the line's start
start = new PolarCoordinate(95, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise);
end = new PolarCoordinate(100, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise);
// And draw a line
Pen p = new Pen(_minorTickPenColor);
f.DrawLine(p, start, end);
p.Dispose();
}
}
#endregion
#region Draw major tick marks
if (majorInterval > 0)
{
using (Pen majorPen = new Pen(_majorTickPenColor))
{
for (double speed = 0; speed < maxSpeed.Value; speed += majorStep)
{
// Convert the speed to an angle
angle = speed * _conversionFactor + _pMinimumAngle.DecimalDegrees;
// Get the coordinate of the line's start
start = new PolarCoordinate(90, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise);
end = new PolarCoordinate(100, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise);
// And draw a line
f.DrawLine(majorPen, start, end);
}
#region Draw a major tick mark at the maximum speed
// Convert the speed to an angle
angle = maxSpeed.Value * _conversionFactor + _pMinimumAngle.DecimalDegrees;
// Get the coordinate of the line's start
start = new PolarCoordinate(90, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise);
end = new PolarCoordinate(100, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise);
// And draw a line
f.DrawLine(majorPen, start, end);
#endregion
}
}
#endregion
using (SolidBrush fontBrush = new SolidBrush(_speedLabelBrushColor))
{
if (cachedSpeedLabelInterval > 0)
{
for (double speed = 0; speed < maxSpeed.Value; speed += cachedSpeedLabelInterval)
{
// Convert the speed to an angle
angle = speed * _conversionFactor + _pMinimumAngle.DecimalDegrees;
// And draw a line
f.DrawCenteredString(new Speed(speed, maxSpeed.Units).ToString(_pSpeedLabelFormat, CultureInfo.CurrentCulture), Font, fontBrush,
new PolarCoordinate(75, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise));
}
// Convert the speed to an angle
angle = maxSpeed.Value * _conversionFactor + _pMinimumAngle.DecimalDegrees;
// And draw the speed label
f.DrawCenteredString(maxSpeed.ToString(_pSpeedLabelFormat, CultureInfo.CurrentCulture), Font, fontBrush,
new PolarCoordinate(75, angle, Azimuth.South, PolarCoordinateOrientation.Clockwise));
}
// Draw the units for the speedometer
if (_pIsUnitLabelVisible)
{
f.DrawCenteredString(_pMaximumSpeed.ToString("u", CultureInfo.CurrentCulture), Font, fontBrush,
new PolarCoordinate(90, Angle.Empty, Azimuth.South, PolarCoordinateOrientation.Clockwise));
}
}
PolarCoordinate[] needle = new PolarCoordinate[_speedometerNeedle.Length];
for (int index = 0; index < needle.Length; index++)
{
needle[index] = _speedometerNeedle[index].Rotate((speedToRender.ToUnitType(_pMaximumSpeed.Units).Value *_conversionFactor) + _pMinimumAngle.DecimalDegrees);
}
// Draw an ellipse at the center
f.DrawEllipse(Pens.Gray, PolarCoordinate.Empty, 10);
#if !PocketPC
// Now draw a shadow
f.Graphics.TranslateTransform(_pNeedleShadowSize.Width, _pNeedleShadowSize.Height, MatrixOrder.Append);
using (Brush b = new SolidBrush(_needleShadowBrushColor)) f.FillPolygon(b, needle);
f.Graphics.ResetTransform();
#endif
// Then draw the actual needle
using (SolidBrush needleFill = new SolidBrush(_needleFillColor)) f.FillPolygon(needleFill, needle);
using (Pen needlePen = new Pen(_needleOutlineColor)) f.DrawPolygon(needlePen, needle);
}
/// <inheritdocs/>
protected override void OnPaintOffScreen(PaintEventArgs e)
{
PolarGraphics f = CreatePolarGraphics(e.Graphics);
// What altitude are we drawing?
Distance altitudeToRender = new Distance(_valueInterpolator[_interpolationIndex], _altitude.Units);
// There are 100 tick marks in 360 degrees. 3.6° per tick mark
const 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);
f.DrawRotatedString(altitudeString, _valueFont,
_valueBrush, new PolarCoordinate(45.0f, Angle.Empty, Azimuth.North, PolarCoordinateOrientation.Clockwise));
// Draw an ellipse at the center
f.DrawEllipse(_centerPen, PolarCoordinate.Empty, 10);
f.Graphics.TranslateTransform(_needleShadowSize.Width, _needleShadowSize.Height, MatrixOrder.Append);
f.FillPolygon(_needleShadowBrush, needle1);
f.FillPolygon(_needleShadowBrush, needle2);
f.FillPolygon(_needleShadowBrush, needle3);
f.Graphics.ResetTransform();
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);
}