/// <summary>
/// Render the label for this <see cref="GasGaugeNeedle"/>.
/// </summary>
/// <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 graphic device object to be drawn into. This is normally e.Graphics from the
/// PaintEventArgs argument to the Paint() method.
/// </param>
/// <param name="rect">Bounding rectangle for this <see cref="GasGaugeNeedle"/>.</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>
public override void DrawLegendKey( Graphics g, GraphPane pane, RectangleF rect, float scaleFactor )
{
if ( !_isVisible )
return;
float yMid = rect.Top + rect.Height / 2.0F;
Pen pen = new Pen( NeedleColor, pane.ScaledPenWidth( NeedleWidth / 2, scaleFactor ) );
pen.StartCap = LineCap.Round;
pen.EndCap = LineCap.ArrowAnchor;
pen.DashStyle = DashStyle.Solid;
g.DrawLine( pen, rect.Left, yMid, rect.Right, yMid );
}
/// <summary>
/// Draw the scale, including the tic marks, value labels, and grid lines as
/// required for this <see cref="Axis"/>.
/// </summary>
/// <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="shiftPos">
/// The number of pixels to shift to account for non-primary axis position (e.g.,
/// the second, third, fourth, etc. <see cref="YAxis" /> or <see cref="Y2Axis" />.
/// </param>
internal void Draw( Graphics g, GraphPane pane, float scaleFactor, float shiftPos )
{
MajorGrid majorGrid = _ownerAxis._majorGrid;
MajorTic majorTic = _ownerAxis._majorTic;
MinorTic minorTic = _ownerAxis._minorTic;
float rightPix,
topPix;
GetTopRightPix( pane, out topPix, out rightPix );
// calculate the total number of major tics required
int nTics = CalcNumTics();
// get the first major tic value
double baseVal = CalcBaseTic();
using ( Pen pen = new Pen( _ownerAxis.Color,
pane.ScaledPenWidth( majorTic._penWidth, scaleFactor ) ) )
{
// redraw the axis border
if ( _ownerAxis.IsAxisSegmentVisible )
g.DrawLine( pen, 0.0F, shiftPos, rightPix, shiftPos );
// Draw a zero-value line if needed
if ( majorGrid._isZeroLine && _min < 0.0 && _max > 0.0 )
{
float zeroPix = LocalTransform( 0.0 );
g.DrawLine( pen, zeroPix, 0.0F, zeroPix, topPix );
}
}
// draw the major tics and labels
DrawLabels( g, pane, baseVal, nTics, topPix, shiftPos, scaleFactor );
// _ownerAxis.DrawMinorTics( g, pane, baseVal, shiftPos, scaleFactor, topPix );
_ownerAxis.DrawTitle( g, pane, shiftPos, scaleFactor );
}
/// <summary>
/// Draw the minor tic marks as required for this <see cref="Axis"/>.
/// </summary>
/// <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="baseVal">
/// The scale value for the first major tic position. This is the reference point
/// for all other tic marks.
/// </param>
/// <param name="shift">The number of pixels to shift this axis, based on the
/// value of <see cref="Cross"/>. A positive value is into the ChartRect relative to
/// the default axis position.</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="topPix">
/// The pixel location of the far side of the ChartRect from this axis.
/// This value is the ChartRect.Height for the XAxis, or the ChartRect.Width
/// for the YAxis and Y2Axis.
/// </param>
public void DrawMinorTics( Graphics g, GraphPane pane, double baseVal, float shift,
float scaleFactor, float topPix )
{
if ( ( this.MinorTic.IsOutside || this.MinorTic.IsOpposite || this.MinorTic.IsInside ||
this.MinorTic._isCrossOutside || this.MinorTic._isCrossInside || _minorGrid._isVisible )
&& _isVisible )
{
double tMajor = _scale._majorStep * _scale.MajorUnitMultiplier,
tMinor = _scale._minorStep * _scale.MinorUnitMultiplier;
if ( _scale.IsLog || tMinor < tMajor )
{
float minorScaledTic = this.MinorTic.ScaledTic( scaleFactor );
// Minor tics start at the minimum value and step all the way thru
// the full scale. This means that if the minor step size is not
// an even division of the major step size, the minor tics won't
// line up with all of the scale labels and major tics.
double first = _scale._minLinTemp,
last = _scale._maxLinTemp;
double dVal = first;
float pixVal;
int iTic = _scale.CalcMinorStart( baseVal );
int MajorTic = 0;
double majorVal = _scale.CalcMajorTicValue( baseVal, MajorTic );
using ( Pen pen = new Pen( _minorTic._color,
pane.ScaledPenWidth( MinorTic._penWidth, scaleFactor ) ) )
using ( Pen minorGridPen = _minorGrid.GetPen( pane, scaleFactor ) )
{
// Draw the minor tic marks
while ( dVal < last && iTic < 5000 )
{
// Calculate the scale value for the current tic
dVal = _scale.CalcMinorTicValue( baseVal, iTic );
// Maintain a value for the current major tic
if ( dVal > majorVal )
majorVal = _scale.CalcMajorTicValue( baseVal, ++MajorTic );
// Make sure that the current value does not match up with a major tic
if ( ( ( Math.Abs( dVal ) < 1e-20 && Math.Abs( dVal - majorVal ) > 1e-20 ) ||
( Math.Abs( dVal ) > 1e-20 && Math.Abs( ( dVal - majorVal ) / dVal ) > 1e-10 ) ) &&
( dVal >= first && dVal <= last ) )
{
pixVal = _scale.LocalTransform( dVal );
_minorGrid.Draw( g, minorGridPen, pixVal, topPix );
_minorTic.Draw( g, pane, pen, pixVal, topPix, shift, minorScaledTic );
}
iTic++;
}
}
}
}
}
internal Pen GetPen( GraphPane pane, float scaleFactor )
{
Pen pen = new Pen( _color,
pane.ScaledPenWidth( _penWidth, scaleFactor ) );
if ( _dashOff > 1e-10 && _dashOn > 1e-10 )
{
pen.DashStyle = DashStyle.Custom;
float[] pattern = new float[2];
pattern[0] = _dashOn;
pattern[1] = _dashOff;
pen.DashPattern = pattern;
}
return pen;
}
internal void FixZeroLine( Graphics g, GraphPane pane, float scaleFactor,
float left, float right )
{
// restore the zero line if needed (since the fill tends to cover it up)
if ( _isVisible && _majorGrid._isZeroLine &&
_scale._min < 0.0 && _scale._max > 0.0 )
{
float zeroPix = _scale.Transform( 0.0 );
using ( Pen zeroPen = new Pen( _color,
pane.ScaledPenWidth( _majorGrid._penWidth, scaleFactor ) ) )
{
g.DrawLine( zeroPen, left, zeroPix, right, zeroPix );
//zeroPen.Dispose();
}
}
}