private static string FitDateTime(IRenderDevice context, double dAvailableWidth, DateTime datetime, IEnumerable <string> dateTimeFormats,
out double dFoundWidth)
{
dFoundWidth = 0;
foreach (string format in dateTimeFormats)
{
string sText = datetime.ToString(format);
double textWidth = context.GetTextWidth(sText);
if (textWidth >= dAvailableWidth)
{
continue;
}
dFoundWidth = textWidth;
return(sText);
}
return(string.Empty);
}
public void PaintEx(IRenderDevice context)
{
if (!m_bChanged || m_dtStartTime == DateTime.MinValue || m_dtStartTime == DateTime.MaxValue)
{
return;
}
double iSymbolWidth = context.GetTextWidth("W") * 1.2;
//find the minimum possible panel format
MinPanel = null;
double dAvailableWidth = context.AvailableWidth;
DateTime curDateTime;
foreach (PanelFormat panel in panels)
{
//round start and end-time accordingly to panel format
ChangedStartTime = panel.RoundStartDateTime(m_dtStartTime);
ChangedEndTime = panel.RoundEndDateTime(m_dtEndTime);
curDateTime = ChangedStartTime;
double dPanelLen = 0;
while (dPanelLen <= dAvailableWidth && curDateTime <= ChangedEndTime)
{
dPanelLen += panel.SymbolsPerUnit * iSymbolWidth;
curDateTime = panel.IncreaseTime(curDateTime);
}
if (dPanelLen > dAvailableWidth)
{
continue;
}
MinPanel = panel;
break;
}
if (MinPanel == null)
{
return;
}
context.PlotPanelSeparator(0);
double dTotalSeconds = (ChangedEndTime - ChangedStartTime).TotalSeconds;
_plotingUnitWidth = dAvailableWidth / dTotalSeconds;
double dx;
string sText;
//main panel
curDateTime = ChangedStartTime;
if (m_datesCargo.Count == 0) //even scale
{
for (; curDateTime <= ChangedEndTime; curDateTime = MinPanel.IncreaseTime(curDateTime))
{
dx = (curDateTime - ChangedStartTime).TotalSeconds * _plotingUnitWidth;
context.PlotUnitSeparator((float)dx, true, 0);
sText = MinPanel.FormatDateTime(curDateTime);
if (curDateTime < ChangedEndTime && dx + context.GetTextWidth(sText) < dAvailableWidth)
{
context.PlotUnitText((float)dx, sText, 0);
}
}
}
else
{
double dTotalCargo = 0;
foreach (KeyValuePair <DateTime, double> pair in m_datesCargo)
{
dTotalCargo += pair.Value;
}
double dPrevTotalWidth = 0;
foreach (KeyValuePair <DateTime, double> pair in m_datesCargo)
{
double dUnitCargo = pair.Value;
double dUnitWidth = (dUnitCargo * dAvailableWidth) / dTotalCargo;
if (MinPanel.SymbolsPerUnit * iSymbolWidth > dUnitWidth)
{
continue;
}
context.PlotUnitSeparator((float)dPrevTotalWidth, true, 0);
context.PlotUnitText((float)dPrevTotalWidth, MinPanel.FormatDateTime(pair.Key), 0);
dPrevTotalWidth += dUnitWidth;
}
}
//Sub Panel painting
if (MinPanel.DateFormats == null || MinPanel.GetNextSubPanelSeparator == null)
{
return;
}
context.PlotPanelSeparator(1);
curDateTime = ChangedStartTime;
double firstWidth = 0;
DateTime prevSeparator = DateTime.MinValue;
for (; curDateTime <= ChangedEndTime; curDateTime = MinPanel.GetNextSubPanelSeparator(curDateTime))
{
if (curDateTime == ChangedStartTime) //at the first position draw the longest possible, this my overlay some of next ones, they must be ignored
{
context.PlotUnitSeparator(0, true, 1);
if ((sText = FitDateTime(context, dAvailableWidth, curDateTime, MinPanel.DateFormats, out firstWidth)) != string.Empty)
{
context.PlotUnitText(0, sText, 1);
}
}
else
{
//if (!MinPanel.IsSubPanelSeparator(curDateTime)) continue;
dx = (curDateTime - ChangedStartTime).TotalSeconds * _plotingUnitWidth;
if (dx <= firstWidth)
{
continue; //ignore those separatoes that are overlayed by first one
}
context.PlotUnitSeparator((float)dx, true, 1);
if (prevSeparator == DateTime.MinValue)
{
prevSeparator = curDateTime;
continue;
}
PlotSubPanelText(context, dAvailableWidth, curDateTime, _plotingUnitWidth, out firstWidth, prevSeparator);
prevSeparator = curDateTime;//remember last position
}
}
if (prevSeparator == DateTime.MinValue)
{
return;
}
PlotSubPanelText(context, dAvailableWidth, curDateTime, _plotingUnitWidth, out firstWidth, prevSeparator);
}