internal static void PickScale( GraphPane pane, Graphics g, float scaleFactor, Scale scale )
{
// Test for trivial condition of range = 0 and pick a suitable default
if ( scale._max - scale._min < 1.0 )
{
if ( scale._maxAuto )
scale._max = scale._min + 0.5;
else
scale._min = scale._max - 0.5;
}
else
{
// Calculate the new step size
if ( scale._majorStepAuto )
{
// Calculate the step size based on targetSteps
scale._majorStep = CalcStepSize( scale._max - scale._min,
( scale._ownerAxis is XAxis || scale._ownerAxis is X2Axis ) ?
Default.TargetXSteps : Default.TargetYSteps );
if ( scale.IsPreventLabelOverlap )
{
// Calculate the maximum number of labels
double maxLabels = scale.CalcMaxLabels( g, pane, scaleFactor );
// Calculate a step size based on the width of the labels
double tmpStep = Math.Ceiling( ( scale._max - scale._min ) / maxLabels );
// Use the greater of the two step sizes
if ( tmpStep > scale._majorStep )
scale._majorStep = tmpStep;
}
}
scale._majorStep = (int)scale._majorStep;
if ( scale._majorStep < 1.0 )
scale._majorStep = 1.0;
// Calculate the new minor step size
if ( scale._minorStepAuto )
scale._minorStep = CalcStepSize( scale._majorStep,
( scale._ownerAxis is XAxis || scale._ownerAxis is X2Axis ) ?
Default.TargetMinorXSteps : Default.TargetMinorYSteps );
if ( scale._minAuto )
scale._min -= 0.5;
if ( scale._maxAuto )
scale._max += 0.5;
}
}
