protected static void OnLayoutPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FrameworkElement uiElement = d as FrameworkElement;
if (uiElement != null)
{
ViewportPanel panel = VisualTreeHelper.GetParent(uiElement) as ViewportPanel;
if (panel != null)
{
// invalidating not self arrange, but calling Arrange method of only that uiElement which has changed position
panel.InvalidatePosition(uiElement);
}
}
}
private void OnPositionChanged(DependencyPropertyChangedEventArgs e)
{
if (e.NewValue != null)
{
PositionChanged.Raise(this, new PositionChangedEventArgs {
Position = (Point)e.NewValue, PreviousPosition = (Point)e.OldValue
});
}
if (plotter?.Viewport?.Transform?.DataTransform != null)
{
// Bit of a WTF, for some reason I have to apply the transform twice
Point dataPoint = Position.DataToViewport(plotter.Viewport.Transform);
ViewportPanel.SetX(this, dataPoint.X);
ViewportPanel.SetY(this, dataPoint.Y);
}
}
private CoordinateTransform GetTransform(Size size)
{
return(viewport.Transform.WithRects(ViewportPanel.GetViewportBounds(this), new Rect(size)));
}
private static void OnPlotterChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ViewportPanel panel = (ViewportPanel)d;
panel.OnPlotterChanged((Plotter)e.NewValue, (Plotter)e.OldValue);
}
