LayoutResult ILayoutManager.Measure(LayoutContext context)
{
var content = (CalendarContentRange)context.ContentRange;
LayoutResult result;
using (var calendarData = new CalendarData(_calendar))
{
// the first time run
if (content == null)
{
content = new CalendarContentRange(_calendar, calendarData.GetFirstMonth(), calendarData.GetLastMonth());
}
else if ((context.LayoutDirection & LayoutDirection.Vertical) != 0) // continue vertical run
{
// do we have anything else to render ?
if (!calendarData.HasMonthAfter(content.MonthTo))
{
return(new LayoutResult(null, LayoutStatus.NoContent | LayoutStatus.Complete, new SizeF()));
}
var continuedRange = content.StaticContentRange.ContinueRange(context);
content = new CalendarContentRange(continuedRange, _calendar, calendarData.GetNextMonth(content.MonthTo), calendarData.GetLastMonth());
}
else if ((context.LayoutDirection & LayoutDirection.Horizontal) != 0) // continue horizontal run
{
var continuedRange = content.StaticContentRange.ContinueRange(context);
content = new CalendarContentRange(continuedRange, _calendar, content.MonthFrom, content.MonthTo);
}
result = MeasureContentRange(content, calendarData, context.AvailableSize);
}
return(result);
}
private LayoutResult MeasureContentRange(CalendarContentRange content, CalendarData calendarData, SizeF maxSize)
{
SizeF actualSize = new SizeF();
LayoutStatus layoutStatus = LayoutStatus.None;
MonthInfo currentMonth = content.MonthFrom;
MonthInfo lastMonthtFitted = currentMonth;
while (currentMonth <= content.MonthTo)
{
// measure the month
SizeF monthSize = calendarData.MeasureMonth(
currentMonth,
new SizeF(_calendar.Width.ToTwips(), _calendar.Height.ToTwips()));
if (currentMonth != content.MonthFrom)
{
monthSize.Height += CalendarData.MonthsSpace;
}
if (actualSize.Height + monthSize.Height > maxSize.Height)
{
layoutStatus |= LayoutStatus.ContinueVertically;
_continueVerticallyAttempts++;
}
// if the current month didn't fit vertically
bool continueVertically = (layoutStatus & LayoutStatus.ContinueVertically) == LayoutStatus.ContinueVertically;
// limit the number of attempts vertical continue
// currentMonth.Month != lastMonthtFitted.Month for prevent the creation of blank pages (case 149145)
if (continueVertically && _continueVerticallyAttempts < 2 && currentMonth.Month != lastMonthtFitted.Month)
{
break;
}
layoutStatus |= LayoutStatus.SomeContent;
actualSize.Width = Math.Max(actualSize.Width, monthSize.Width);
actualSize.Height += monthSize.Height;
// if the current month didn't fit vertically AND emptyFplPage == true
if (continueVertically)
{
break;
}
lastMonthtFitted = currentMonth;
if (!calendarData.HasMonthAfter(currentMonth))
{
// all months were fitted
layoutStatus |= LayoutStatus.Complete;
break;
}
currentMonth = calendarData.GetNextMonth(currentMonth);
}
if (actualSize.Width > maxSize.Width)
{
layoutStatus |= LayoutStatus.ContinueHorizontally;
}
return(new LayoutResult(
new CalendarContentRange(content.StaticContentRange, _calendar, content.MonthFrom, lastMonthtFitted),
layoutStatus, actualSize));
}