public TrendPresenter(TrendPen trendPen)
{
_trendPen = trendPen;
TrendTag = trendPen.TrendTag;
LineThickness = trendPen.Thickness;
LineBrush = trendPen.Brush;
_queryTimer.Elapsed += QueryTimerElapsed;
Loaded += TrendPresenterLoaded;
Unloaded += TrendPresenterUnloaded;
}
public TrendPresenter(TrendPen trendPen)
{
_trendPen = trendPen;
TrendTag = trendPen.TrendTag;
LineThickness = trendPen.Thickness;
LineBrush = trendPen.Brush;
_queryTimer.Elapsed += QueryTimerElapsed;
Loaded += TrendPresenterLoaded;
Unloaded += TrendPresenterUnloaded;
}
public SliderPresenter(TrendPen pen)
{
InitializeComponent();
DataContext = pen;
}
public SliderPresenter(TrendPen pen)
{
InitializeComponent();
DataContext = pen;
}
private void AddPen(TrendPen trendPen)
{
var trendTagBinding = BindingOperations.GetBinding(trendPen, TrendPen.TrendTagProperty);
if (trendTagBinding != null
&& trendTagBinding.Source == null
&& trendTagBinding.RelativeSource == null
&& trendTagBinding.ElementName == null)
{
BindingOperations.ClearBinding(trendPen, TrendPen.TrendTagProperty);
trendTagBinding = new Binding(trendTagBinding.Path.Path) {Source = DataContext};
BindingOperations.SetBinding(trendPen, TrendPen.TrendTagProperty, trendTagBinding);
}
var trendPresenter = new TrendPresenter(trendPen) { MaxPoints = _maxPoints };
var showPointsBinding = new Binding("ShowPoints") { Source = this };
trendPresenter.SetBinding(TrendPresenter.ShowPointsProperty, showPointsBinding);
_trendPresenters.Add(trendPen, trendPresenter);
_gTrendPresenters.Children.Add(trendPresenter);
_trendPens.Add(trendPen);
#region Slider
var sliderPresenter = new SliderPresenter(trendPen);
_sliderPresenters.Add(trendPen, sliderPresenter);
sliderPresenter.SizeChanged += SliderPresenterSizeChanged;
sliderPresenter.LayoutUpdated += SliderPresenterLayoutUpdated;
_spSlider.Children.Add(sliderPresenter);
var sliderPresenterVisibilityBinding = new Binding("Visible")
{
Source = trendPen,
Converter = new BooleanToVisibilityConverter()
};
sliderPresenter.SetBinding(VisibilityProperty, sliderPresenterVisibilityBinding);
var sliderLine = new Line();
_sliderLines.Add(trendPen, sliderLine);
sliderLine.Stroke = _sliderLinesBrush;
sliderLine.StrokeThickness = _sliderLinesThickness;
var cursorCoordinateBinding = new Binding("CursorCoordinate") { Source = trendPresenter };
sliderLine.SetBinding(Line.Y1Property, cursorCoordinateBinding);
var sliderLineVisibilityBinding = new MultiBinding {Converter = new SliderLineVisibilityConverter()};
sliderLineVisibilityBinding.Bindings.Add(new Binding("Visible") { Source = trendPen });
sliderLineVisibilityBinding.Bindings.Add(new Binding("CursorCoordinate") { Source = trendPresenter });
sliderLine.SetBinding(VisibilityProperty, sliderLineVisibilityBinding);
UpdateSliderLine(sliderLine, trendPen);
_cSlider.Children.Add(sliderLine);
#endregion
}
private void UpdateSliderLine(Line line, TrendPen trendPen)
{
if (!_sliderPresenters.ContainsKey(trendPen))
return;
var sliderPresenter = _sliderPresenters[trendPen];
var transform = sliderPresenter.TransformToVisual(_cSlider);
var position = transform.Transform(new Point(0, 0));
line.Y2 = position.Y + sliderPresenter.ActualHeight/2;
if (position.X < 0)
{
line.X2 = position.X + sliderPresenter.ActualWidth;
}
else
{
line.X2 = position.X;
}
}
private void RemovePen(TrendPen trendPen)
{
var trendPresenter = _trendPresenters[trendPen];
BindingOperations.ClearBinding(trendPresenter, TrendPresenter.ShowPointsProperty);
_trendPresenters.Remove(trendPen);
_gTrendPresenters.Children.Remove(trendPresenter);
_trendPens.Remove(trendPen);
#region Slider
var sliderPresenter = _sliderPresenters[trendPen];
_sliderPresenters.Remove(trendPen);
sliderPresenter.SizeChanged -= SliderPresenterSizeChanged;
sliderPresenter.LayoutUpdated -= SliderPresenterLayoutUpdated;
_spSlider.Children.Remove(sliderPresenter);
BindingOperations.ClearBinding(sliderPresenter, VisibilityProperty);
var sliderLine = _sliderLines[trendPen];
_sliderLines.Remove(trendPen);
BindingOperations.ClearBinding(sliderLine, Line.Y1Property);
BindingOperations.ClearBinding(sliderLine, VisibilityProperty);
_cSlider.Children.Remove(sliderLine);
#endregion
}
private void OnCurrentTrendPenChanged(TrendPen oldPen, TrendPen newPen)
{
if (oldPen != null)
{
if (_trendPens.Contains(oldPen))
{
var presenter = _trendPresenters[oldPen];
_gTrendPresenters.Children.Remove(presenter);
var index = _trendPens.IndexOf(oldPen);
_gTrendPresenters.Children.Insert(index, presenter);
}
}
if (newPen != null)
{
if (_trendPens.Contains(newPen))
{
var presenter = _trendPresenters[newPen];
_gTrendPresenters.Children.Remove(presenter);
_gTrendPresenters.Children.Insert(_gTrendPresenters.Children.Count, presenter);
}
}
}
