public void UpdateFocus(int center, bool animateTransition)
{
_focus = new FocusArea(center, center - _focusRadius, center + _focusRadius);
_focus = _focus.Clip(Model.Default.Document.Length);
DOIStrategy.OnFocusChanged();
View.Default.UpdateLayout(animateTransition);
}
private void InflateWeights(FocusArea focus, float multiplier, float timePassed, float power)
{
for (int i = focus.Start; i < focus.End; i++)
{
float distanceWeight = 1.0f - (float)focus.DistanceToCenter(i) / focus.Lines;
_weights[i] += multiplier * (float)Math.Pow(timePassed, power) * distanceWeight;
}
Normalize(_weights);
}
public virtual void OnFocusChanged()
{
float timePassed = (float)(DateTime.Now - _lastChange).TotalSeconds;
if (timePassed > _timeout && _lastFocus != null)
{
InflateWeights(_lastFocus, 0.05f, timePassed, timePower);
UpdateHistory(_lastFocus);
}
_lastChange = DateTime.Now;
_lastFocus = Model.Default.Focus;
}
private void UpdateHistory(FocusArea focus)
{
for (int i = focus.Start; i < focus.End; i++)
_history[i] = DateTime.Now;
}
private void InitDOI()
{
//_maxWeight = 0.1f;
_lastChange = DateTime.Now;
_lastFocus = Model.Default.Focus;
_semanticWeights = Utilities.CreateSemanticWeights(50);
_weights = new float[Model.Default.Length];
_history = new DateTime[Model.Default.Length];
for (int i = 0; i < Model.Default.Length; i++)
{
_weights[i] = 1f;
_history[i] = _lastChange;
}
}