protected virtual void OnExpressionChanged(IExpressionView obj)
{
Action <IExpressionView> handler = ExpressionChanged;
if (handler != null)
{
handler(obj);
}
}
private async Task ReEvaluate()
{
_lastRequestTime = DateTime.Now;
if (_isEvaluating)
{
return;
}
DateTime initialRequesetTime = _lastRequestTime;
_isEvaluating = true;
LineExpression[] expressions = _processingView.Expressions.TakeWhile(r => r.IsValid)
.Select(r => new LineExpression(r.Name, r.Expression))
.ToArray();
string input = _processingView.ExampleText;
Argument[] results = await Task.Factory.StartNew(delegate
{
var processor = new Processor(_provider, expressions);
return(processor.Parse(input).All.ToArray());
});
_isEvaluating = false;
for (int i = 1; i < results.Length; i++)
{
IValue value = results[i].ArgumentValue;
IExpressionView expression = _processingView.Expressions.FirstOrDefault(e => e.Name == results[i].Name);
if (expression == null)
{
continue;
}
if (value.HasError)
{
expression.Value = "#ERR";
expression.Error = value.ErrorMessage;
}
else
{
expression.Value = value.UntypedValue.ToString();
expression.Error = null;
}
}
if (initialRequesetTime != _lastRequestTime)
{
await ReEvaluate();
}
}
public ExpressionViewPresenter(IExpressionView view)
{
_view = view;
_view.ExpressionTextBox.TextChanged += ExpressionTextBox_TextChanged;
_view.ExpressionTextBox.KeyPress += ExpressionTextBox_KeyPress;
SharedViewState.Instance.PropertyChanged += (o, e) =>
{
if (e.PropertyName == nameof(SharedViewState.Instance.CurrentView))
{
_view.Visible =
!(SharedViewState.Instance.CurrentView == ViewName.Scripting ||
SharedViewState.Instance.CurrentView == ViewName.CustomFunctions);
}
};
}
public ExpressionViewPresenter(IExpressionView view, ISharedViewState sharedViewState, IModeDeterminer modeDeterminer)
{
_view = view;
_sharedViewState = sharedViewState;
this.modeDeterminer = modeDeterminer;
_view.ExpressionTextBox.TextChanged += ExpressionTextBox_TextChanged;
_view.ExpressionTextBox.KeyPress += ExpressionTextBox_KeyPress;
_sharedViewState.PropertyChanged += (o, e) =>
{
if (e.PropertyName == nameof(_sharedViewState.CurrentView))
{
_view.Visible =
!(_sharedViewState.CurrentView == ViewName.Scripting ||
_sharedViewState.CurrentView == ViewName.CustomFunctions);
}
};
}
private void SingleExpressionChanged(IExpressionView expressionView)
{
timChangeTimer.Start();
}
private async void HandleExpressionChanged(IExpressionView expressionView)
{
await ReEvaluate();
}
