/// <summary>
/// Draws the view
/// </summary>
/// <param name="drawing">drawing wrapper</param>
/// <param name="options">drawing options</param>
/// <param name="margin">drawing margin</param>
public virtual void Draw(IDrawing drawing, IDrawOptions options, IMargin margin)
{
if (drawing == null || margin == null)
{
throw new InvalidArgumentException("parameter is null");
}
if (!(options is ScalingDrawOptions))
{
throw new InvalidArgumentException("options is not compatible");
}
var state = ((ScalingDrawOptions)options).State;
var canvasSize = options.CanvasSize;
var clip = new RectangleF((float)margin.Left, (float)margin.Top, (float)(canvasSize.Width - margin.LeftAndRight), (float)(canvasSize.Height - margin.TopAndBottom));
if (state.MovingStart != null && state.MovingPosition != null)
{
drawing.Line(state.MovingPenColor, state.MovingStart.Value.X, state.MovingStart.Value.Y, state.MovingPosition.Value.X, state.MovingPosition.Value.Y, clip);
}
if (state.ScalingStart != null && state.ScalingPosition != null)
{
Rectangle rectangle = SortCoordinates(state.ScalingStart.Value, state.ScalingPosition.Value);
var color = state.ZoomIncrease ? state.ZoomInPenColor : state.ZoomOutPenColor;
drawing.Rectangle(color, rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height, clip);
}
}
