private static void SetFormat(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
TimeSpanPicker timeSpanPicker = (TimeSpanPicker)obj;
timeSpanPicker.parts.Clear();
IndexedDateTimePart currentPart = null;
char previousFormatCharacter = '\0';
for (int formatIndex = 0, selectionIndex = 0; formatIndex < timeSpanPicker.Format.Length; ++formatIndex, ++selectionIndex)
{
char formatCharacter = timeSpanPicker.Format[formatIndex];
switch (formatCharacter)
{
case 'd': // days
case 'f': // milliseconds
case 'F':
case 'h': // hours
case 'm': // minutes
case 's': // seconds
break;
case '\\':
// backslashes aren't displayed and hence aren't part of selection
--selectionIndex;
continue;
case '.':
case ':':
case ' ':
// skip delimiters and spaces
continue;
default:
throw new NotSupportedException(String.Format("Unsupported format character '{0}'.", formatCharacter));
}
if (formatCharacter != previousFormatCharacter)
{
// encountered new part
currentPart = new IndexedDateTimePart(formatCharacter, formatIndex, selectionIndex);
timeSpanPicker.parts.Add(currentPart);
previousFormatCharacter = formatCharacter;
}
else
{
// still in same part
++currentPart.FormatLength;
++currentPart.SelectionLength;
}
}
// the first part may have a minus sign and therefore has variable selection indicies
if (timeSpanPicker.parts.Count > 0)
{
timeSpanPicker.parts[0].IsSelectionStartVariable = true;
}
// ensure part index is valid
if (timeSpanPicker.parts.Count < 1)
{
timeSpanPicker.currentPartIndex = -1;
}
else if (timeSpanPicker.currentPartIndex < 0)
{
timeSpanPicker.currentPartIndex = 0;
}
else if (timeSpanPicker.currentPartIndex > timeSpanPicker.parts.Count - 1)
{
timeSpanPicker.currentPartIndex = timeSpanPicker.parts.Count - 1;
}
// ensure displayed value uses current format
timeSpanPicker.TimeSpanDisplay.Text = timeSpanPicker.Value.ToString(timeSpanPicker.Format);
}
private static void SetFormat(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
DateTimeOffsetPicker dateTimeOffsetPicker = (DateTimeOffsetPicker)obj;
dateTimeOffsetPicker.monthPartIndex = Int32.MaxValue;
dateTimeOffsetPicker.parts.Clear();
IndexedDateTimePart currentPart = null;
char previousFormatCharacter = '\0';
for (int formatIndex = 0, selectionIndex = 0; formatIndex < dateTimeOffsetPicker.Format.Length; ++formatIndex, ++selectionIndex)
{
char formatCharacter = dateTimeOffsetPicker.Format[formatIndex];
switch (formatCharacter)
{
case 'd': // day
case 'f': // millisecond
case 'F':
case 'h': // hour
case 'H':
case Constant.Time.DateTimeOffsetPart: // offset
case 'm': // minute
case 'M': // month
case 's': // second
case 'y': // year
case 'z': // offset
break;
case '\\':
// backslashes aren't displayed and hence aren't part of selection
--selectionIndex;
continue;
case '.':
case ':':
case '/':
case '-':
case ' ':
case 'T':
case 'Z':
// skip delimiters and UTC indicator
continue;
default:
throw new NotSupportedException(String.Format("Unsupported format character '{0}'.", formatCharacter));
}
if (formatCharacter != previousFormatCharacter)
{
if ((currentPart != null) && (currentPart.Format == 'M') && (currentPart.FormatLength == 3))
{
// part which just ended is an MMM month part and may render as two to eight or more characters depending on the current culture
// If needed this check can be done after the loop completes but there's no scenario for putting the month at the end of the date or
// not following it with some other part. Lengths of zero are excluded as most calendars have 12 months.
List<int> abbreviatedMonthNameLengths = CultureInfo.CurrentCulture.DateTimeFormat.AbbreviatedMonthNames.Select(name => name.Length).Distinct().Where(length => length > 0).ToList();
int minimumSelectionLength = abbreviatedMonthNameLengths.Min();
currentPart.IsSelectionLengthVariable = abbreviatedMonthNameLengths.Count > 1;
currentPart.SelectionLength = minimumSelectionLength;
dateTimeOffsetPicker.monthPartIndex = dateTimeOffsetPicker.parts.Count - 1;
selectionIndex += minimumSelectionLength - 3;
}
// encountered new part
currentPart = new IndexedDateTimePart(formatCharacter, formatIndex, selectionIndex);
dateTimeOffsetPicker.parts.Add(currentPart);
previousFormatCharacter = formatCharacter;
if (formatCharacter == Constant.Time.DateTimeOffsetPart)
{
// current part is hours part, which may have a minus sign and therefore has a variable start
currentPart.IsSelectionStartVariable = true;
currentPart.SelectionLength = 2;
// add minutes part
IndexedDateTimePart minutesPart = new IndexedDateTimePart(formatCharacter, formatIndex, currentPart.SelectionStart + currentPart.SelectionLength + 1)
{
SelectionLength = 2
};
dateTimeOffsetPicker.parts.Add(minutesPart);
}
}
else
{
// still in same part
++currentPart.FormatLength;
++currentPart.SelectionLength;
}
}
// ensure part index is valid
if (dateTimeOffsetPicker.parts.Count < 1)
{
dateTimeOffsetPicker.currentPartIndex = -1;
}
else if (dateTimeOffsetPicker.currentPartIndex < 0)
{
dateTimeOffsetPicker.currentPartIndex = 0;
}
else if (dateTimeOffsetPicker.currentPartIndex > dateTimeOffsetPicker.parts.Count - 1)
{
dateTimeOffsetPicker.currentPartIndex = dateTimeOffsetPicker.parts.Count - 1;
}
// ensure displayed value uses current format
dateTimeOffsetPicker.DateTimeDisplay.Text = dateTimeOffsetPicker.Value.ToString(dateTimeOffsetPicker.Format);
}
