private void _changer_VolumeChanged(object sender, EventsArgs <int> args)
{
//megaCrutchCode
if (_model.AcceptedValues.Length > 1)
{
var direction = args.Value > 0 ? -1 : 1;
var currentValues = listView.ItemsSource as string[];
var currentIndex = currentValues.ToList().IndexOf(_currentVal);
var nextIndex = currentIndex + direction;
if (nextIndex >= currentValues.Length)
{
nextIndex = 0;
}
else if (nextIndex < 0)
{
nextIndex = currentValues.Length - 1;
}
_currentVal = currentValues[nextIndex];
if (_prevItem != null)
{
_prevItem.StrokeVisible = false;
}
ScrollTo(_currentVal);
if (_visibleItems.ContainsKey(_currentVal))
{
var itemView = _visibleItems[_currentVal];
_prevItem = itemView;
itemView.StrokeVisible = true;
}
}
}
public StatusViewSwitch(SwitchScenarioModel scenarioModel) : this()
{
//megaCrutchCode
BindingContext = _model = scenarioModel;
_model.PropertyChanged += _model_PropertyChanged;
_currentVal = _model.ScenarioValue;
listView.ItemsSource = _model.AcceptedValues; // Crutch to allocate listView height
if (IsNeedShowSearchButton())
{
tbSearch.Text = GetSearchCache(_model.Scenario.ScenarioId);
tbSearch.Completed += (o, e) => HandleSearch();
// HELL
bool initiateSearchHandled = false;
listView.SizeChanged += (o, e) =>
{
if (!initiateSearchHandled)
{
initiateSearchHandled = true;
if (!string.IsNullOrEmpty(tbSearch.Text))
{
HandleSearch();
}
}
};
btClearSearch.Click += (o, e) =>
{
tbSearch.Text = string.Empty;
HandleSearch();
};
iconSearch.IsVisible = true;
tbSearch.IsVisible = true;
}
else
{
iconTitle.IsVisible = true;
lblTitle.IsVisible = true;
}
// Невозможно замапить объекты, так как, почему-то, сбивается размер всего контрола.
// Если мапить строки, то размер нормальный.
listView.ItemTemplate = new DataTemplate(() =>
{
var itemView = new ItemViewFast();
itemView.SetBinding(ItemViewFast.TextProperty, ".");
itemView.Selectable = true;
itemView.StrokeVisibilityClick = true;
itemView.HeightRequest = 42;
itemView.SelectionChanged += (o, e) =>
{
if (itemView.Selected)
{
foreach (var item in _visibleItems.Values)
{
if (item != itemView && item.Selected)
{
item.Selected = false;
}
}
}
};
itemView.PropertyChanged += (o, e) =>
{
if (e.PropertyName == nameof(itemView.Text))
{
if (itemView.Text == _model.ScenarioValue)
{
itemView.Selected = true;
}
else if (itemView.Selected)
{
itemView.Selected = false;
}
}
};
itemView.Click += (o, e) =>
{
if (_model.ScenarioValue == itemView.Text)
{
var valueType = _model.Scenario.ValueType as StateValueType;
RaiseSelect(valueType.DefaultValue, ItemView.ClickSource.CloseAnyway);
}
else
{
RaiseSelect(itemView.Text, (ItemView.ClickSource)e.Value);
}
};
var viewCell = new ViewCell();
viewCell.Appearing += (o, e) =>
{
if (itemView.Text != null)
{
if (_visibleItems.ContainsKey(itemView.Text))
{
_visibleItems.Remove(itemView.Text);
}
_visibleItems.Add(itemView.Text, itemView);
itemView.Selected = itemView.Text == _model.ScenarioValue;
}
};
viewCell.Disappearing += (o, e) =>
{
if (itemView.Text != null && _visibleItems.ContainsKey(itemView.Text))
{
_visibleItems.Remove(itemView.Text);
}
itemView.Selected = false;
};
viewCell.View = itemView;
return(viewCell);
});
}
public StatusViewSwitch(ScenarioModel scenarioModel) : this()
{
DataContext = scenarioModel;
BeginInit();
#if !DEBUG
spSearch.Visibility = scenarioModel.AcceptedValues.Length > 150 ? Visibility.Visible : Visibility.Collapsed;
#endif
tbScenarioName.Text = scenarioModel.ScenarioName;
ItemViewFast initialSelectedItem = null;
foreach (var state in scenarioModel.AcceptedValues)
{
var itemView = new ItemViewFast();
itemView.Text = state;
itemView.Margin = new Thickness(0, 1, 0, 1);
if (scenarioModel.ScenarioValue?.Equals(state) ?? false)
{
initialSelectedItem = itemView;
}
listItemsStates.Children.Add(itemView);
}
tbSearch.Text = GetSearchCache(scenarioModel.Scenario.Id);
if (!string.IsNullOrEmpty(tbSearch.Text))
{
ShowSearchResult();
}
Loaded += (o, e) =>
{
if (initialSelectedItem != null)
{
initialSelectedItem.Selected = true;
initialSelectedItem.Focus();
}
};
listItemsStates.SelectionChanged += (o, e) =>
{
var selectedItem = listItemsStates.GetSelectedItems().FirstOrDefault() as ItemViewFast;
if (selectedItem != null)
{
if (selectedItem.Text != scenarioModel.ScenarioValue)
{
scenarioModel.ScenarioValue = selectedItem.Text;
StateChanged?.Invoke(this, new RoutedEventArgs());
}
}
else
{
scenarioModel.ScenarioValue = (scenarioModel.Scenario.ValueType as StateValueType).DefaultValue;
StateChanged?.Invoke(this, new RoutedEventArgs());
}
};
tbSearch.TextChanged += (o, e) => {
_timer?.Dispose();
SetSearchCache(scenarioModel.Scenario.Id, tbSearch.Text);
_timer = new Timer((s) => {
_timer = null;
Dispatcher.BeginInvoke(new Action(ShowSearchResult));
}, null, 600, Timeout.Infinite);
};
EndInit();
}