VixenModules.Editor.TimedSequenceEditor.MarkManager.buttonGenerateSubmarks_Click C# (CSharp) Method

        private void buttonGenerateSubmarks_Click(object sender, EventArgs e)
        {
            if (listViewMarks.SelectedItems.Count < 2) {
                MessageBox.Show("Select at least two marks to generate times between.", "Need more marks");
                return;
            }

            Common.Controls.TextDialog prompt = new Common.Controls.TextDialog("Break each interval into how many equal segments?");
            if (prompt.ShowDialog() == DialogResult.OK) {
                int divisions;
                if (int.TryParse(prompt.Response, out divisions)) {

                    DialogResult newCollectionResult = MessageBox.Show("Do you want to put the new marks into a different collection?", "Add to new collection?", MessageBoxButtons.YesNoCancel);
                    if (newCollectionResult == DialogResult.Cancel) {
                        return;
                    }

                    List<TimeSpan> sourceTimes = new List<TimeSpan>();
                    foreach (ListViewItem item in listViewMarks.SelectedItems) {
                        sourceTimes.Add((TimeSpan)item.Tag);
                    }
                    sourceTimes.Sort();

                    List<TimeSpan> newTimes = new List<TimeSpan>();
                    for (int i = 1; i < sourceTimes.Count; i++) {
                        TimeSpan interval = TimeSpan.FromTicks((sourceTimes[i] - sourceTimes[i - 1]).Ticks / divisions);
                        for (int j = 0; j < divisions; j++) {
                            newTimes.Add(sourceTimes[i - 1] + TimeSpan.FromTicks(interval.Ticks * j));
                        }
                    }
                    newTimes.Add(sourceTimes.Last());

                    MarkCollection destination = _displayedCollection;

                    if (newCollectionResult == DialogResult.Yes) {
                        List<KeyValuePair<string, object>> options = new List<KeyValuePair<string, object>>();
                        foreach (MarkCollection mc in MarkCollections) {
                            options.Add(new KeyValuePair<string, object>(mc.Name, mc));
                        }
                        Common.Controls.ListSelectDialog selector = new Common.Controls.ListSelectDialog("Destination Mark Collection?", options);
                        if (selector.ShowDialog() == DialogResult.OK) {
                            destination = selector.SelectedItem as MarkCollection;
                        }
                    }

                    foreach (TimeSpan time in newTimes) {
                        if (!destination.Marks.Contains(time))
                            destination.Marks.Add(time);
                    }

                    destination.Marks.Sort();

                    if (destination == _displayedCollection) {
                        PopulateMarkListFromMarkCollection(_displayedCollection);
                    }
                    UpdateMarkCollectionInList(destination);
                } else {
                    MessageBox.Show("Error parsing number: please enter a whole number for the number of divisions.", "Error parsing number");
                }
            }
        }