private void Timeline_OnMouseWheel(object sender, MouseWheelEventArgs e)
{
if (Keyboard.Modifiers == ModifierKeys.Alt)
{
e.Handled = true;
var zoomIn = e.Delta > 0;
var bands = zoomIn
? Children.OfType <TimelineBand>().Reverse().ToList()
: Children.OfType <TimelineBand>().ToList();
var rows = zoomIn
? RowDefinitions.Reverse().ToList()
: RowDefinitions.ToList();
var index = bands.IndexOf(bands.First(x => x.IsMainBand));
var amount = Math.Min(Math.Abs(e.Delta / 120), bands.Count - index - 1);
if (amount > 0)
{
var main = bands.SkipWhile(x => !x.IsMainBand).First();
var next = bands.SkipWhile(x => !x.IsMainBand).Skip(amount).First();
main.IsMainBand = false;
next.IsMainBand = true;
main.MaxEventHeight = 130;
foreach (var band in bands.TakeWhile(x => !x.IsMainBand))
{
band.MaxEventHeight = 4;
}
var mainRow = rows.SkipWhile(x => x.Height != new GridLength(1, GridUnitType.Star)).First();
var nextRow =
rows.SkipWhile(x => x.Height != new GridLength(1, GridUnitType.Star))
.Skip(amount)
.First();
mainRow.Height = new GridLength(40);
nextRow.Height = new GridLength(1, GridUnitType.Star);
foreach (var hide in rows.TakeWhile(x => x.Height != new GridLength(1, GridUnitType.Star)))
{
hide.Height = new GridLength(40);
}
// reset the bands
HookChildElements(Children);
main.CreateTimelineCalculator(
CalendarType,
CurrentDateTime,
MinDateTime,
MaxDateTime
);
bands.ForEach(
b => b.CreateTimelineCalculator(CalendarType, CurrentDateTime, MinDateTime, MaxDateTime));
RefreshEvents(false);
}
}
}
void EnsureRowsColumnsInitialized()
{
_columns = ColumnDefinitions == null ? new List <ColumnDefinition>() : ColumnDefinitions.ToList();
_rows = RowDefinitions == null ? new List <RowDefinition>() : RowDefinitions.ToList();
int lastRow = -1;
for (var index = 0; index < InternalChildren.Count; index++)
{
Element w = InternalChildren[index];
lastRow = Math.Max(lastRow, GetRow(w) + GetRowSpan(w) - 1);
}
lastRow = Math.Max(lastRow, RowDefinitions.Count - 1);
int lastCol = -1;
for (var index = 0; index < InternalChildren.Count; index++)
{
Element w = InternalChildren[index];
lastCol = Math.Max(lastCol, GetColumn(w) + GetColumnSpan(w) - 1);
}
lastCol = Math.Max(lastCol, ColumnDefinitions.Count - 1);
while (_columns.Count <= lastCol)
{
_columns.Add(new ColumnDefinition());
}
while (_rows.Count <= lastRow)
{
_rows.Add(new RowDefinition());
}
for (var index = 0; index < _columns.Count; index++)
{
ColumnDefinition col = _columns[index];
col.ActualWidth = -1;
}
for (var index = 0; index < _rows.Count; index++)
{
RowDefinition row = _rows[index];
row.ActualHeight = -1;
}
}