/// <summary>
/// Initializes a new instance of the <see cref="TimeLineViewModel"/> class.
/// </summary>
public TimeLineViewModel()
{
var now = DateTime.UtcNow;
_maxTime = now;
_minTime = now.AddHours(-24);
_scrollPosition = 0;
_scrollScale = 1.0;
_warpGradientParameters = CalculateSkyGradient();
_service = ServiceLocator.GetInstance <EarthQuakesService>();
//NOTE: service is null when Blend calls this constructor when opening the TimeLineView.xaml
if (_service != null)
{
_service.RequestMode = EarthQuakeRequestMode.LastWeek;
_regionsFilter = new FilterViewModel(_service.EartQuakeRegionNames, _service.SelectedRegions);
_regionsFilter.FilterChanged += RegionsFilterPropertyChanged;
//Register using a weak event on the service PropertyChanged event.
WeakPropertyChangedListener.CreateIfNecessary(_service, this);
UpdateEarthQuakeData(_service.EarthQuakes);
if (!_service.IsStarted)
{
_service.StartService();
}
}
}
private static void OnSpecialSlotsSourcePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
MultiDayViewSettings settings = (MultiDayViewSettings)sender;
INotifyCollectionChanged oldSlotsSource = args.OldValue as INotifyCollectionChanged;
if (oldSlotsSource != null)
{
var listener = settings.specialSlotsCollectionChangedListener;
if (listener != null)
{
listener.Detach();
listener = null;
}
int count = settings.specialSlotsPropertyChangedListeners != null ? settings.specialSlotsPropertyChangedListeners.Count : 0;
while (count > 0)
{
var propertyListener = settings.specialSlotsPropertyChangedListeners[0];
settings.specialSlotsPropertyChangedListeners.RemoveAt(0);
propertyListener.Detach();
propertyListener = null;
count--;
}
}
INotifyCollectionChanged newSlotsSource = args.NewValue as INotifyCollectionChanged;
if (newSlotsSource != null)
{
settings.specialSlotsCollectionChangedListener = WeakCollectionChangedListener.CreateIfNecessary(newSlotsSource, settings);
foreach (Slot slot in (IEnumerable <Slot>)newSlotsSource)
{
var listener = WeakPropertyChangedListener.CreateIfNecessary(slot, settings);
if (listener != null)
{
settings.specialSlotsPropertyChangedListeners.Add(listener);
}
}
}
if (oldSlotsSource != null && settings.IsOwnerLoaded)
{
settings.owner.timeRulerLayer.RecycleSlots((IEnumerable <Slot>)oldSlotsSource);
}
settings.Invalide(MultiDayViewUpdateFlag.AffectsSpecialSlots);
}
/// <summary>
/// Initializes a new instance of the <see cref="MapViewModel"/> class.
/// </summary>
public MapViewModel()
{
_earthQuakeRadiusScaleMin = 10;
_earthQuakeRadiusScaleMax = 90;
_earthQuakeColorScaleMin = 2.5;
_earthQuakeColorScaleMax = 10;
_service = ServiceLocator.GetInstance <EarthQuakesService>();
// NOTE: service is null when Blend calls this constructor when opening the TimeLineView.xaml
if (_service != null)
{
_service.RequestMode = EarthQuakeRequestMode.LastWeek;
_regionsFilter = new FilterViewModel(_service.EartQuakeRegionNames, _service.SelectedRegions);
_regionsFilter.FilterChanged += RegionsFilterPropertyChanged;
WeakPropertyChangedListener.CreateIfNecessary(_service, this);
GetEarthQuakeData(_service.EarthQuakes);
if (!_service.IsStarted)
{
_service.StartService();
}
}
}
/// <summary>
/// Implementation of the <see cref="ICollectionChangedListener" /> interface.
/// </summary>
/// <param name="sender">The collection sending the event.</param>
/// <param name="e">The event args.</param>
public void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (Slot slot in e.NewItems)
{
WeakPropertyChangedListener newListener = WeakPropertyChangedListener.CreateIfNecessary(slot, this);
if (newListener != null)
{
this.specialSlotsPropertyChangedListeners.Add(newListener);
}
}
break;
case NotifyCollectionChangedAction.Remove:
if (this.specialSlotsPropertyChangedListeners != null && this.specialSlotsPropertyChangedListeners.Count > 0)
{
foreach (Slot slot in e.OldItems)
{
WeakPropertyChangedListener oldPropertyListener = this.specialSlotsPropertyChangedListeners[e.OldStartingIndex];
if (oldPropertyListener != null)
{
this.specialSlotsPropertyChangedListeners.Remove(oldPropertyListener);
oldPropertyListener.Detach();
oldPropertyListener = null;
}
}
}
this.owner.timeRulerLayer?.RecycleSlots(e.OldItems.Cast <Slot>());
break;
case NotifyCollectionChangedAction.Move:
case NotifyCollectionChangedAction.Replace:
WeakPropertyChangedListener propertyListener = this.specialSlotsPropertyChangedListeners[e.OldStartingIndex];
if (propertyListener != null)
{
this.specialSlotsPropertyChangedListeners.Remove(propertyListener);
propertyListener.Detach();
propertyListener = null;
}
WeakPropertyChangedListener listener = WeakPropertyChangedListener.CreateIfNecessary(e.NewItems[0], this);
if (listener != null)
{
this.specialSlotsPropertyChangedListeners.Add(listener);
}
break;
case NotifyCollectionChangedAction.Reset:
break;
default:
break;
}
if (sender == this.SpecialSlotsSource)
{
this.Invalide(MultiDayViewUpdateFlag.AffectsSpecialSlots);
}
}
