/**

 *     Program: EvenlySpaceEvents.cs

 * Description: This script will evenly space all the events on the selected track within

 *              the timeline selection.

 *      Author: John Rofrano

 *   Copyright: (c) 2009 Sundance Media Group / VASST

 * 

 * Revision Date: July 24, 2009

 **/



using System;

using System.Collections;

using System.Windows.Forms;

using Sony.Vegas;



class EntryPoint

{

    public void FromVegas(Vegas vegas)

    {

        try

        {

            Timecode selectionLength = vegas.Transport.LoopRegionLength;

            Timecode selectionStart = vegas.Transport.LoopRegionStart;



            // make sure a loop selection is made

            if (selectionLength.ToMilliseconds() == 0)

            {

                throw new ApplicationException("You must create a loop region on the timeline.");

            }



            foreach (Track track in vegas.Project.Tracks)

            {

                // only process selected tracks

                if (!track.Selected) continue;



                // make sure there are at least two events to space

                if (track.Events.Count < 2)

                {

                    string errorMessage =  "You must have at least two or more events on the selected track to space.";

                    MessageBox.Show(errorMessage, "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);

                    continue;   // skip this track

                }



                // calculate the combined events length

                Timecode totalEventTime = Timecode.FromMilliseconds(0);

                foreach (TrackEvent trackEvent in track.Events)

                {

                    totalEventTime += trackEvent.Length;

                }



                // warn if the events won't fit in the selection

                if (totalEventTime > selectionLength)

                {

                    string errorMessage = String.Format("You cannot fit {0} of events into a {1} selection.", totalEventTime, selectionLength);

                    MessageBox.Show(errorMessage, "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);

                    continue;   // skip this track

                }



                // calculate the event gap

                Timecode emptySpace = selectionLength - totalEventTime;

                int gapCount = track.Events.Count - 1;    // there is one less gap than events

                Timecode eventGap = Timecode.FromMilliseconds(emptySpace.ToMilliseconds() / gapCount);



                // space the events evenly

                ArrayList eventList = new ArrayList(track.Events);

                Timecode nextPosition = selectionStart;

                foreach (TrackEvent trackEvent in eventList)

                {

                    trackEvent.Start = nextPosition;

                    nextPosition = trackEvent.End + eventGap;

                }

            }

        }

        catch (Exception e)

        {

            MessageBox.Show(e.Message, "Evenly Space Events - Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

        }

    }

}