private int calculateNumLabels()
{
CalculateNext NextMajor = GetNextMajorFunction();
DateTime v = ScaleMinimum;
int i;
for (i = 0; ; i++)
{
if (v > ScaleMaximum)
{
break;
}
v = NextMajor(v);
}
return(i + 1);
}
private CalculateNext GetNextMajorFunction()
{
// Create a function that, applied to a date/time, returns the
// "next" value for major labels.
CalculateNext NextMajor = null;
if (axisType == AxisType.Quarters)
{
NextMajor = delegate(DateTime dt) { return(cal.AddMonths(dt, 3)); }
}
;
else if (axisType == AxisType.DailyWithHourlyTicks || axisType == AxisType.DailyWithHourlyLabels)
{
NextMajor = delegate(DateTime dt) { return(cal.AddDays(dt, 1)); }
}
;
else
{
NextMajor = delegate(DateTime dt) { return(cal.AddMonths(dt, 1)); }
};
return(NextMajor);
}
public void DrawX(Graphics g, AdvancedRect area, AdvancedRect plotArea)
{
drawArea = area;
//using (Brush br = new SolidBrush(Color.Green))
// g.FillRectangle(br, area.Rect);
GraphicsState _s = g.Save();
using (Brush br = labelFont.CreateBrush())
using (Font f = labelFont.CreateFont())
using (Font f2 = smallLabelFont.CreateFont())
using (Pen p = tickPen.CreatePen())
using (Pen pgrid = gridlinePen.CreatePen())
using (Pen pminor = minorTickPen.CreatePen())
{
CalculateNext nextMajor = GetNextMajorFunction();
// Same dealy-o, but for minor ticks / labels.
CalculateNext nextMinor = null;
if (axisType == AxisType.MonthsHorizontalWithDailyTicks || axisType == AxisType.MonthsHorizontalWithDailyLabels)
{
nextMinor = delegate(DateTime dt) { return(cal.AddDays(dt, 1)); }
}
;
else if (axisType == AxisType.DailyWithHourlyTicks || axisType == AxisType.DailyWithHourlyLabels)
{
nextMinor = delegate(DateTime dt) { return(cal.AddHours(dt, 1)); }
}
;
else if (axisType == AxisType.Quarters)
{
nextMinor = delegate(DateTime dt) { return(cal.AddMonths(dt, 1)); }
}
;
// Determine major label format -- {0} is the major label v,
// {1} is the quarter
string majorLabel = null;
if (axisType == AxisType.Quarters)
{
majorLabel = "Q{1} {0:\\'yy}";
}
else if (axisType == AxisType.DailyWithHourlyTicks || axisType == AxisType.DailyWithHourlyLabels)
{
majorLabel = "{0:MMM %d \\'yy}";
}
else
{
majorLabel = "{0:MMM \\'yy}";
}
// Determine minor label format:
string minorLabel = null;
if (axisType == AxisType.MonthsHorizontalWithDailyLabels)
{
minorLabel = "{0:%d}";
}
else if (axisType == AxisType.DailyWithHourlyLabels)
{
minorLabel = "{0:%h%t}";
}
// Add some extra spacing if putting minor labels in.
float minorLabelSpacing = 0;
if (nextMinor != null && minorLabel != null)
{
minorLabelSpacing = 1f / 16;
}
// StringFormat for drawing major labels:
StringFormat majorForm = new StringFormat();
if (axisType == AxisType.MonthsVertical || axisType == AxisType.Quarters)
{
majorForm.FormatFlags = StringFormatFlags.DirectionVertical;
}
// Determine first major label value.
DateTime dtLeft;
if (axisType == AxisType.Quarters)
{
// set v to beginning of quarter which ScaleMinimum is in
dtLeft = new DateTime(ScaleMinimum.Year, (((ScaleMinimum.Month - 1) / 3) * 3) + 1, 1);
}
else if (axisType == AxisType.DailyWithHourlyTicks || axisType == AxisType.DailyWithHourlyLabels)
{
// set v to beginning of day
dtLeft = new DateTime(ScaleMinimum.Year, ScaleMinimum.Month, ScaleMinimum.Day);
}
else
{
// set v to beginning of month
dtLeft = new DateTime(ScaleMinimum.Year, ScaleMinimum.Month, 1);
}
for (int i = 0; i < calculateNumLabels(); i++)
{
float xLeft = DataToCoordinate(dtLeft, area);
xLeft = Math.Max(xLeft, area.TopLeft.X);
if (xLeft > area.BottomRight.X)
{
break;
}
DateTime dtRight = nextMajor(dtLeft);
float xRight = DataToCoordinate(dtRight, area);
xRight = Math.Min(xRight, area.BottomRight.X);
// Major ticks & gridlines:
g.DrawLine(p, xLeft, area.TopLeft.Y, xLeft, area.TopLeft.Y + tickLength);
if (gridlinesEnabled && xLeft > area.TopLeft.X && xLeft < area.BottomRight.X)
{
g.DrawLine(pgrid, xLeft, plotArea.TopLeft.Y, xLeft, plotArea.BottomRight.Y);
}
// Minor ticks:
if (nextMinor != null)
{
DateTime dtMinorLeft = nextMinor(dtLeft);
while (dtMinorLeft < dtRight)
{
float xMinorLeft = DataToCoordinate(dtMinorLeft, area);
if (xMinorLeft > area.TopLeft.X && xMinorLeft < area.BottomRight.X)
{
g.DrawLine(pminor, xMinorLeft, area.TopLeft.Y, xMinorLeft, area.TopLeft.Y + minorTickLength);
}
dtMinorLeft = nextMinor(dtMinorLeft);
}
}
if (minorLabel != null && nextMinor != null)
{
DateTime dtMinorLeft = dtLeft;
while (dtMinorLeft < dtRight)
{
DateTime dtMinorRight = nextMinor(dtMinorLeft);
float xMinorLeft = DataToCoordinate(dtMinorLeft, area);
float xMinorRight = DataToCoordinate(dtMinorRight, area);
if (xMinorLeft >= area.TopLeft.X && xMinorRight <= area.BottomRight.X)
{
string dtxt = String.Format(minorLabel, dtMinorLeft);
SizeF dsz = g.MeasureString(dtxt, f2);
float xlabel = ((xMinorLeft + xMinorRight) / 2) - (dsz.Width / 2);
if (xlabel > area.TopLeft.X && (xlabel + dsz.Width) < area.BottomRight.X)
{
g.DrawString(dtxt, f2, br, ((xMinorLeft + xMinorRight) / 2) - (dsz.Width / 2), area.TopLeft.Y);
}
}
dtMinorLeft = dtMinorRight;
}
}
// Draw major label:
string txt = String.Format(majorLabel, dtLeft, (dtLeft.Month / 3) + 1);
SizeF sz = g.MeasureString(txt, f, 100, majorForm);
float draw_x = ((xLeft + xRight) / 2) - (sz.Width / 2);
if (draw_x > area.TopLeft.X && (draw_x + sz.Width) < area.BottomRight.X)
{
g.DrawString(txt, f, br, ((xLeft + xRight) / 2) - (sz.Width / 2), area.TopLeft.Y + tickLength + minorLabelSpacing, majorForm);
}
dtLeft = dtRight;
}
// one final tick to signify end of last visible month
float xL = DataToCoordinate(dtLeft, area);
if (xL < area.BottomRight.X)
{
g.DrawLine(p, xL, area.TopLeft.Y, xL, area.TopLeft.Y + tickLength);
if (gridlinesEnabled)
{
g.DrawLine(pgrid, xL, plotArea.TopLeft.Y, xL, plotArea.BottomRight.Y);
}
}
}
g.Restore(_s);
}
