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Normal Topic Go to today (Read 2223 times)
SimonL
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Go to today
Mar 2nd, 2007 at 11:27am
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We're using your control in our app to display the bookings of hotel rooms. Therefore we have the control in resource view mode. Hotel rooms down the y-axis and dates acrros the x-axis. If the user has scrolled months or years in the future or past, is there a way to bring them back to today.

I saw the following code in another thread but I don't think this works in resource view mode

       '' Calculate the timespan between the starting date in the calendar and the date we want to scroll to
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	  'Dim span As TimeSpan = DateTime.Today - BookingsView.Date

	  '' Calulate the row containing the specified date, considering that each row contains 7 days
	  'Dim col As Integer = CInt(span.TotalDays / 25)

	  ''Scroll the calendar
	  'BookingsView.ScrollPosition = New Point(col, BookingsView.ScrollPosition.Y)


Any suggestions ?

Thanks,
Simon
  
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Meppy
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Re: Go to today
Reply #1 - Mar 2nd, 2007 at 12:16pm
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Indeed, calculating the appropriate scroll position in a resource view is way more complex, because it is based on the scroll step interval and the time unit of the bottommost timeline. Filtering is also to be taken into consideration if it is toggled on.

However the method EnsureVisible enables you to 'scroll' to any date or item currently contained within the view. Here is a code which will 'scroll' to today:

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calendar.EnsureVisible(DateTime.Today);


Once again, this method only works if the targeted date or item is already contained somewhere within the control. The method simply adjusts the value of the scrollbar. It cannot change the start or end date of the contained time interval.

Meppy
  
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Meppy
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Re: Go to today
Reply #2 - Mar 2nd, 2007 at 12:26pm
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I'm sorry that the example code is in C#. I saw too late you are using VB.NET. Here is the code in VB.NET:

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calendar.EnsureVisible(DateTime.Today)


Out of curiosity, why do you divide to 25 in your example code? If the ResourceView.ScrollStep is set to 1 day and the bottommost timeline's TimeUnit is set to TimeUnit.Day, I reckon you should use the span.TotaDays as a X position of the scroller.

Meppy
  
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SimonL
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Re: Go to today
Reply #3 - Mar 2nd, 2007 at 12:37pm
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Thanks Meppy, exactly what I wanted. I was using 25 because that was the number of day columns I display in the calendar. It was just a guess.

I much prefer your solution, one line of code always works for me Smiley

Regards,
Simon
  
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