internal ValueGrid(GridRange gr, double low, double up, ValueAxisUnit vAxis, double basevalue)
{
double grLower = Double.MaxValue;
double grUpper = Double.MinValue;
if (gr != null)
{
this.rigid = gr.Rigid;
grLower = gr.LowerValue;
grUpper = gr.UpperValue;
}
this.lower = low;
this.upper = up;
this.vAxis = vAxis;
this.baseValue = basevalue;
// Fill in the scale values
double tmp = 1;
for (int i = 1; i < 7; i++)
{
tmp *= baseValue;
scaleValues[6 - i] = tmp;
}
tmp = 1;
for (int i = 7; i < scaleValues.Length; i++)
{
tmp *= baseValue;
scaleValues[i] = (1 / tmp);
}
// Set an appropriate value axis it not given yet
SetValueAxis();
if (!rigid)
{
this.lower = (lower == grLower ? grLower : this.vAxis.GetNiceLower(lower));
this.upper = (upper == grUpper ? grUpper : this.vAxis.GetNiceHigher(upper));
}
}
private void SetValueAxis()
{
if (vAxis != null)
{
return;
}
if (upper == Double.NaN || upper == Double.MinValue || upper == Double.MaxValue)
{
upper = 0.9;
}
if (lower == Double.NaN || lower == Double.MaxValue || lower == Double.MinValue)
{
lower = 0;
}
if (!rigid && upper == 0 && upper == lower)
{
upper = 0.9;
}
// Determine nice axis grid
double shifted = Math.Abs(upper - lower);
if (shifted == 0) // Special case, no 'range' available
{
shifted = upper;
}
// Find the scaled unit for this range
double mod = 1.0;
int scaleIndex = scaleValues.Length - 1;
while (scaleIndex >= 0 && scaleValues[scaleIndex] < shifted)
{
scaleIndex--;
}
// Keep the rest of division
shifted = shifted / scaleValues[++scaleIndex];
// While rest > 10, divide by 10
while (shifted > 10.0)
{
shifted /= 10;
mod *= 10;
}
while (shifted < 1.0)
{
shifted *= 10;
mod /= 10;
}
// Create nice grid based on 'fixed' ranges
if (shifted <= 1.5)
{
vAxis = new ValueAxisUnit(0.1 * mod * scaleValues[scaleIndex], 0.5 * mod * scaleValues[scaleIndex]);
}
else if (shifted <= 3)
{
vAxis = new ValueAxisUnit(0.2 * mod * scaleValues[scaleIndex], 1.0 * mod * scaleValues[scaleIndex]);
}
else if (shifted <= 5)
{
vAxis = new ValueAxisUnit(0.5 * mod * scaleValues[scaleIndex], 1.0 * mod * scaleValues[scaleIndex]);
}
else
{
vAxis = new ValueAxisUnit(0.5 * mod * scaleValues[scaleIndex], 2.0 * mod * scaleValues[scaleIndex]);
}
}
/// <summary>
///
/// </summary>
/// <param name="gridStep"></param>
/// <param name="labelStep"></param>
public void SetValueAxis(double gridStep, double labelStep)
{
vAxis = new ValueAxisUnit(gridStep, labelStep);
}