|
private WorldTickPositions_SecondPass ( Point physicalMin, Point physicalMax, |
||
| physicalMin | Point | The physical position corresponding to the world minimum of the axis. |
| physicalMax | Point | The physical position corresponding to the world maximum of the axis. |
| largeTickPositions | The positions of the large ticks, unchanged | |
| smallTickPositions | If null, small tick positions are returned via this parameter. Otherwise this function does nothing. | |
| return | void | |
internal override void WorldTickPositions_SecondPass(
Point physicalMin,
Point physicalMax,
ArrayList largeTickPositions,
ref ArrayList smallTickPositions)
{
if (smallTickPositions != null)
{
throw new NPlotException( "not expecting smallTickPositions to be set already." );
}
smallTickPositions = new ArrayList();
// retrieve the spacing of the big ticks. Remember this is decades!
double bigTickSpacing = this.DetermineTickSpacing();
int nSmall = this.DetermineNumberSmallTicks( bigTickSpacing );
// now we have to set the ticks
// let us start with the easy case where the major tick distance
// is larger than a decade
if ( bigTickSpacing > 1.0f )
{
if (largeTickPositions.Count > 0)
{
// deal with the smallticks preceding the
// first big tick
double pos1 = (double)largeTickPositions[0];
while (pos1 > this.WorldMin)
{
pos1 = pos1 / 10.0f;
smallTickPositions.Add( pos1 );
}
// now go on for all other Major ticks
for (int i=0; i<largeTickPositions.Count; ++i )
{
double pos = (double)largeTickPositions[i];
for (int j=1; j<=nSmall; ++j )
{
pos=pos*10.0F;
// check to see if we are still in the range
if (pos < WorldMax)
{
smallTickPositions.Add( pos );
}
}
}
}
}
else
{
// guess what...
double [] m = { 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f };
// Then we deal with the other ticks
if (largeTickPositions.Count > 0)
{
// first deal with the smallticks preceding the first big tick
// positioning before the first tick
double pos1=(double)largeTickPositions[0]/10.0f;
for (int i=0; i<m.Length; i++)
{
double pos=pos1*m[i];
if (pos>this.WorldMin)
{
smallTickPositions.Add(pos);
}
}
// now go on for all other Major ticks
for (int i=0; i<largeTickPositions.Count; ++i )
{
pos1=(double)largeTickPositions[i];
for (int j=0; j<m.Length; ++j )
{
double pos=pos1*m[j];
// check to see if we are still in the range
if (pos < WorldMax)
{
smallTickPositions.Add( pos );
}
}
}
}
else
{
// probably a minor tick would anyway fall in the range
// find the decade preceding the minimum
double dec=Math.Floor(Math.Log10(WorldMin));
double pos1=Math.Pow(10.0,dec);
for (int i=0; i<m.Length; i++)
{
double pos=pos1*m[i];
if (pos>this.WorldMin && pos< this.WorldMax )
{
smallTickPositions.Add(pos);
}
}
}
}
}