private void ButtonNext_Click(object sender, EventArgs e)
{
// get the view mode from the current ViewXML, this will tell us what calendar view we're in
var mode = GetCurrentCalendarViewMode();
SetCurrentViewControlAsActiveIfNecessary(mode, ButtonNext, ref Startup.LastNextButtonClicked);
var offset = GetNextPreviousOffsetBasedOnCalendarViewMode(mode);
OutlookViewControl.GoToDate(OutlookViewControl.SelectedDate.AddDays(offset).ToString(CultureInfo.InvariantCulture));
}
// Terrible hack to get around a bug in the Outlook View Control where if you have more than one
// calendar view active, GoToDate will not work on the instance it's called on, instead it will
// work on the last "active" view of the calendar, which may or may not be the current one.
// So to get around that, if the last clicked next button was not this one, we reset the
// calendar view to make it active, before using GoToDate.
private void SetCurrentViewControlAsActiveIfNecessary(CurrentCalendarView mode, Button button, ref Guid lastButtonGuidClicked)
{
// we don't need to do this if we only have one instance, so bail right away.
if (InstanceManager.InstanceCount == 1)
{
return;
}
// we can bail if we know the last button clicked was the one on this form.
if ((Guid)button.Tag == lastButtonGuidClicked)
{
return;
}
var currentDate = OutlookViewControl.SelectedDate;
switch (mode)
{
case CurrentCalendarView.Day:
SetViewXml(Resources.DayXML);
break;
case CurrentCalendarView.Week:
SetViewXml(Resources.WeekXML);
break;
case CurrentCalendarView.WorkWeek:
SetViewXml(Resources.WorkWeekXML);
break;
case CurrentCalendarView.Month:
SetViewXml(Resources.MonthXML);
break;
default:
throw new ArgumentOutOfRangeException(nameof(mode), mode, null);
}
OutlookViewControl.GoToDate(currentDate.ToString(CultureInfo.InvariantCulture));
lastButtonGuidClicked = (Guid)button.Tag;
}