//Draw Axis labels
private void GenerateAxis(Graphics g)
{
//Initialize variables
data d;
SizeF size;
int maxwidth = int.MinValue;
int maxheight = int.MinValue;
double tmp = 0.0f;
double tx = 0.0f;
double ty = 0.0f;
double dbl = 0.0f;
int length = 0;
int maxpower = 0;
string postfix = "";
double denum = 0;
#region Make axislabels for X axis
switch (gr.XAxisType)
{
//Generate axis labels for X axis
case AxisType.LIN:
//Get postfix and denumerator
maxpower = GraphMath.MaxPower(gr.X.Max, gr.X.Min);
GraphMath.GetPostfix(maxpower, out postfix, out denum);
//Get number of steps
length = 0;
tmp = gr.X.Min;
while (tmp < (gr.X.Max + gr.X.Step / 2))
{
length++;
if (length > 1000)
{
break;
}
tmp += gr.X.Step;
}
//Generated axis label
xaxis = new data[length];
tx = gr.X.Min;
for (int i = 0; i < length; i++)
{
//Init
d = new data();
//Adjust value and add postfix
d.Name = DoubleToString((double)(tx / denum)) + postfix;
//Get the screensize of the value
size = g.MeasureString(d.Name, Font);
if (maxheight < size.Height)
{
maxheight = (int)Math.Ceiling(size.Height);
}
d.Width = d.Ceiling(size.Width);
d.Height = d.Ceiling(size.Height);
d.f = tx;
//Save for later
xaxis[i] = d;
//Step
tx += gr.X.Step;
}
break;
//Make axislabel for logarithmic x axis
case AxisType.LOG:
//Get number of gridlines
length = (int)Math.Ceiling((gr.X.Max + 1) - gr.X.Min);
//Make label
xaxis = new data[length];
for (int i = 0; i < length; i++)
{
//Get value;
dbl = i + gr.X.Min;
//Init
d = new data();
//Prettyfie the value
d.Name = GraphMath.GetPrettyString(Math.Pow(10, dbl));
//Measure Height of the value
size = g.MeasureString(d.Name, Font);
if (maxheight < size.Height)
{
maxheight = (int)Math.Ceiling(size.Height);
}
//Set width&Height
d.Width = d.Ceiling(size.Width);
d.Height = d.Ceiling(size.Height);
//Store value
d.f = dbl;
//Save for later
xaxis[i] = d;
}
break;
}
#endregion
#region Make axislabels for Y axis
switch (gr.YAxisType)
{
case AxisType.LIN:
//Make postfix and denummerator
maxpower = GraphMath.MaxPower(gr.Y.Max, gr.Y.Min);
GraphMath.GetPostfix(maxpower, out postfix, out denum);
//Get number of steps
length = 0;
tmp = gr.Y.Min;
while (tmp < (gr.Y.Max + gr.Y.Step / 2))
{
length++;
if (length > 1000)
{
break;
}
tmp += gr.Y.Step;
}
//Generate Axis
bool zeroexist = false;
yaxis = new data[length + 1];
ty = gr.Y.Min;
for (int i = 0; i < length; i++)
{
//Init
d = new data();
//Check if any of the values are zero
if (ty == 0)
{
zeroexist = true;
}
//Adjust value and add postfix
d.Name = DoubleToString((double)(ty / denum)) + postfix;
d.f = (double)ty;
//Get/set size
size = g.MeasureString(d.Name, Font);
if (maxwidth < size.Width)
{
maxwidth = (int)Math.Ceiling(size.Width);
}
d.Width = d.Ceiling(size.Width);
d.Height = d.Ceiling(size.Height);
//Save for later
yaxis[i] = d;
//Step
ty += gr.Y.Step;
}
//If there was a zero don't add zero line
if (!zeroexist)
{
d = new data();
d.Name = "0";
size = g.MeasureString("0", Font);
d.Width = d.Ceiling(size.Width);
d.Height = d.Ceiling(size.Height);
d.f = 0;
yaxis[yaxis.Length - 1] = d;
}
else
{
d = new data();
d.Name = "";
size = g.MeasureString("", Font);
d.Width = d.Ceiling(size.Width);
d.Height = d.Ceiling(size.Height);
d.f = double.NaN;
yaxis[yaxis.Length - 1] = d;
}
break;
//Make axislabels for logarithmic Y axis
case AxisType.LOG:
//Get Number of gridlines
length = (int)Math.Ceiling((gr.Y.Max + 1) - gr.Y.Min);
//Make axislabels
yaxis = new data[length];
for (int i = 0; i < length; i++)
{
//Get value
dbl = i + gr.Y.Min;
//Initialize
d = new data();
//Prettyfy value
d.Name = GraphMath.GetPrettyString(Math.Pow(10, dbl));
d.f = (double)dbl;
//Get/Set Size
size = g.MeasureString(d.Name, Font);
if (maxwidth < size.Width)
{
maxwidth = (int)Math.Ceiling(size.Width);
}
d.Width = d.Ceiling(size.Width);
d.Height = d.Ceiling(size.Height);
//Store
yaxis[i] = d;
}
break;
}
#endregion
//Set margins from calculated width and height of the axislabels
this.MarginLeft = maxwidth;
this.MarginBottom = maxheight;
//Set the Right Margin
if (xaxis != null)
{
if (xaxis.Length > 0)
{
this.MarginRight = (int)Math.Ceiling((double)xaxis[xaxis.Length - 1].Width / 2);
}
}
//Set the Left Margin
if (yaxis != null)
{
if (yaxis.Length > 0)
{
this.MarginTop = (int)Math.Ceiling((double)yaxis[yaxis.Length - 1].Height / 2);
}
}
}
