private void UpdateTouchPosition(float x, float y)
{
var height = this.Height;
var width = this.Width;
var minimal = Math.Min(height, width);
var relativeX = 2 * (x - width / 2) / minimal;
var relativeY = 2 * (y - height / 2) / minimal;
if (relativeX > 1.0f)
{
relativeX = 1.0f;
}
if (relativeX < -1.0f)
{
relativeX = -1.0f;
}
if (relativeY > 1.0f)
{
relativeY = 1.0f;
}
if (relativeY < -1.0f)
{
relativeY = -1.0f;
}
// note that we rotate x and y here because we want 0 to be up the screen
TouchPosition = new CartesianPositionParameters {
Y = relativeX, X = -relativeY
};
Fire(TouchPositionChanged);
}
private void SetHightlightPosition(CartesianPositionParameters positionParameters, FrameworkElement highlightImage,
Canvas theParent)
{
Canvas.SetTop(highlightImage,
(theParent.ActualHeight - positionParameters.Y * theParent.ActualHeight -
highlightImage.ActualHeight) / 2);
Canvas.SetLeft(highlightImage,
(theParent.ActualWidth + positionParameters.X * theParent.ActualWidth -
highlightImage.ActualWidth) / 2);
}
private void DoMove(double x = 0, double y = 0)
{
var parameters = new CartesianPositionParameters()
{
X = x,
Y = y
};
ViewModel.Movement.RollCommand.Execute(parameters);
}
private CartesianPositionParameters GetRelativePositionParameters(object sender, MouseEventArgs e)
{
var target = (FrameworkElement)sender;
var position = e.GetPosition(target);
var relativeX = 2.0 * (position.X / target.ActualWidth) - 1.0;
var relativeY = 1.0 - 2.0 * (position.Y / target.ActualHeight);
var positionParameters = new CartesianPositionParameters {
X = relativeX, Y = relativeY
};
return(positionParameters);
}
protected virtual void OnNewCoordinates()
{
var parameters = new CartesianPositionParameters()
{
X = newX / (ellipseSense.ActualWidth / 2),
Y = newY / (ellipseSense.ActualWidth / 2),
};
var handler = NewCoordinates;
if (handler != null)
{
handler(this, new MvxValueEventArgs <CartesianPositionParameters>(parameters));
}
}
