Is this a known problem, or am I just not understanding something?
I displayed the grid lines by setting the grid to visible with a count of 9 in the design editor. This was set under the Chart->Axes->Minor->Grid... dialog.
As a slight bit of background, I took and modified some of the code from the "All Features -> Axes -> Custom logarithmic axis" example and tried to draw the lines myself. This code draws the grid marks with what seems the correct amount of space between them.
Code: Select all
private void historicalBoxPlots_BeforeDrawAxes(object sender, Steema.TeeChart.Drawing.Graphics3D g)
{
// get rectangle occupied by chart
Rectangle chartRect = g.Chart.ChartRect;
// get axis and use same pen style as minor grid
Axis leftAxis = g.Chart.Axes.Left;
g.Pen.Style = leftAxis.MinorGrid.Style;
g.Pen.Color = leftAxis.MinorGrid.Color;
// get start and end position for minor line
int start = chartRect.Left - leftAxis.MinorTicks.Length;
int end = chartRect.Right;
double currentPos = 0;
// hardcoded the decades to simplify code
for(int i = 1; i <= 3; i++)
{
// loop to draw minor grid lines
for(int k = 2; k <= 9; k++)
{
currentPos = Math.Log10(k) * Math.Pow(10, i);
int tickPos = leftAxis.CalcPosValue(currentPos);
g.Line(start, tickPos, end, tickPos); // horizontal minor tick marks
}
}
}
