/// <summary>
/// Calculate the values needed to properly display this <see cref="GasGaugeNeedle"/>.
/// </summary>
/// <param name="pane">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
public static void CalculateGasGaugeParameters(GraphPane pane)
{
//loop thru slices and get total value and maxDisplacement
double minVal = double.MaxValue;
double maxVal = double.MinValue;
foreach (CurveItem curve in pane.CurveList)
{
if (curve is GasGaugeRegion)
{
GasGaugeRegion ggr = (GasGaugeRegion)curve;
if (maxVal < ggr.MaxValue)
{
maxVal = ggr.MaxValue;
}
if (minVal > ggr.MinValue)
{
minVal = ggr.MinValue;
}
}
}
//Set Needle Sweep angle values here based on the min and max values of the GasGuage
foreach (CurveItem curve in pane.CurveList)
{
if (curve is GasGaugeNeedle)
{
GasGaugeNeedle ggn = (GasGaugeNeedle)curve;
float sweep = ((float)ggn.NeedleValue - (float)minVal) /
((float)maxVal - (float)minVal) * 180.0f;
ggn.SweepAngle = sweep;
}
}
}
/// <summary>
/// The Copy Constructor
/// </summary>
/// <param name="ggn">The <see cref="GasGaugeNeedle"/> object from which to copy</param>
public GasGaugeNeedle(GasGaugeNeedle ggn)
: base(ggn)
{
NeedleValue = ggn.NeedleValue;
NeedleColor = ggn.NeedleColor;
NeedleWidth = ggn.NeedleWidth;
SweepAngle = ggn.SweepAngle;
_border = ggn.Border.Clone();
_labelDetail = ggn.LabelDetail.Clone();
_labelDetail.FontSpec.Size = ggn.LabelDetail.FontSpec.Size;
}
/// <summary>
/// Calculate the <see cref="RectangleF"/> that will be used to define the bounding rectangle of
/// the GasGaugeNeedle.
/// </summary>
/// <remarks>This rectangle always lies inside of the <see cref="Chart.Rect"/>, and it is
/// normally a square so that the pie itself is not oval-shaped.</remarks>
/// <param name="g">
/// A graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="pane">
/// A reference to the <see cref="GraphPane"/> object that is the parent or
/// owner of this object.
/// </param>
/// <param name="scaleFactor">
/// The scaling factor to be used for rendering objects. This is calculated and
/// passed down by the parent <see cref="GraphPane"/> object using the
/// <see cref="PaneBase.CalcScaleFactor"/> method, and is used to proportionally adjust
/// font sizes, etc. according to the actual size of the graph.
/// </param>
/// <param name="chartRect">The <see cref="RectangleF"/> (normally the <see cref="Chart.Rect"/>)
/// that bounds this pie.</param>
/// <returns></returns>
public static RectangleF CalcRectangle(Graphics g, GraphPane pane, float scaleFactor, RectangleF chartRect)
{
RectangleF nonExpRect = chartRect;
if ((2 * nonExpRect.Height) > nonExpRect.Width)
{
//Scale based on width
float percentS = ((nonExpRect.Height * 2) - nonExpRect.Width) / (nonExpRect.Height * 2);
nonExpRect.Height = ((nonExpRect.Height * 2) - ((nonExpRect.Height * 2) * percentS));
}
else
{
nonExpRect.Height = nonExpRect.Height * 2;
}
nonExpRect.Width = nonExpRect.Height;
float xDelta = (chartRect.Width / 2) - (nonExpRect.Width / 2);
//Align Horizontally
nonExpRect.X += xDelta;
nonExpRect.Inflate(-(float)0.05F * nonExpRect.Height, -(float)0.05 * nonExpRect.Width);
GasGaugeNeedle.CalculateGasGaugeParameters(pane);
foreach (CurveItem curve in pane.CurveList)
{
if (curve is GasGaugeNeedle)
{
GasGaugeNeedle ggn = (GasGaugeNeedle)curve;
ggn._boundingRectangle = nonExpRect;
}
}
return(nonExpRect);
}
/// <summary>
/// The Copy Constructor
/// </summary>
/// <param name="ggn">The <see cref="GasGaugeNeedle"/> object from which to copy</param>
public GasGaugeNeedle( GasGaugeNeedle ggn )
: base(ggn)
{
NeedleValue = ggn.NeedleValue;
NeedleColor = ggn.NeedleColor;
NeedleWidth = ggn.NeedleWidth;
SweepAngle = ggn.SweepAngle;
_border = ggn.Border.Clone();
_labelDetail = ggn.LabelDetail.Clone();
_labelDetail.FontSpec.Size = ggn.LabelDetail.FontSpec.Size;
}