public TimelineViewModelBase(TimelineModelBase model)
{
this._model = model;
this._timeline = new ObservableCollection<StatusViewModel>();
DispatcherHolder.Enqueue(this.InitializeCollection, DispatcherPriority.Background);
this.CompositeDisposable.Add(
new EventListener<Action<bool>>(
h => model.InvalidationStateChanged += h,
h => model.InvalidationStateChanged -= h,
s => this.IsLoading = s));
this.CompositeDisposable.Add(() =>
{
if (_listener != null) _listener.Dispose();
});
this.CompositeDisposable.Add(
this.ListenPropertyChanged(() => this.CurrentAccounts)
.ObserveOnDispatcher()
.Select(_ => this.CurrentAccounts.ToArray())
.Subscribe(a => _timeline.ForEach(s => s.BindingAccounts = a)));
this.IsLoading = true;
this._model.InvalidateTimeline();
}
public TimelineViewModelBase(TimelineModelBase model)
{
this._model = model;
this._timeline = new ObservableCollection<StatusViewModel>();
DispatcherHelper.UIDispatcher.InvokeAsync(this.InitializeCollection, DispatcherPriority.Background);
this.CompositeDisposable.Add(
new EventListener<Action<bool>>(
h => model.IsLoadingChanged += h,
h => model.IsLoadingChanged -= h,
isLoading =>
{
if (isLoading)
{
// send immediate
// ! MUST BE DispatcherPriority.Send !
// for update binding value before beginning rendering.
DispatcherHelper.UIDispatcher.InvokeAsync(() =>
{
this.IsLoading = true;
}, DispatcherPriority.Send);
}
else
{
// wait for dispatcher
DispatcherHelper.UIDispatcher.InvokeAsync(() =>
{
// this clause is invoked later, so re-check currrent value
if (model.IsLoading == false)
{
this.IsLoading = false;
}
}, DispatcherPriority.ContextIdle);
}
}));
this.CompositeDisposable.Add(() =>
{
if (_listener != null) _listener.Dispose();
});
this.CompositeDisposable.Add(
this.ListenPropertyChanged(() => this.CurrentAccounts,
e => DispatcherHelper.UIDispatcher.InvokeAsync(() =>
{
var a = this.CurrentAccounts.ToArray();
this._timeline.ForEach(s => s.BindingAccounts = a);
})));
this.CompositeDisposable.Add(
Setting.ScrollLockStrategy.ListenValueChanged(
v =>
{
RaisePropertyChanged(() => this.IsScrollLockEnabled);
RaisePropertyChanged(() => this.IsScrollLockOnlyScrolled);
}));
this.CompositeDisposable.Add(
Setting.IsAnimateScrollToNewTweet.ListenValueChanged(
v => RaisePropertyChanged(() => IsAnimationEnabled)));
this.CompositeDisposable.Add(
Setting.IsScrollByPixel.ListenValueChanged(
v =>
{
RaisePropertyChanged(() => ScrollUnit);
RaisePropertyChanged(() => IsAnimationEnabled);
}));
this._model.InvalidateTimeline();
}
