/// <summary>
/// Updates the view bounds.
/// </summary>
private void UpdateViewBounds()
{
Vector2 tl = Vector2.Zero;
Vector2 br = new Vector2(_renderControl.Width, _renderControl.Height);
tl = Vector2.Transform(tl, InverseViewMatrix);
br = Vector2.Transform(br, InverseViewMatrix);
_bounds = Numerics.Rectangle.ContainingPoints(tl, br);
if (!_layoutSuspended)
{
ViewBoundsChanged?.Invoke(this, EventArgs.Empty);
}
}
/// <summary>
/// Gets the transform matricies used for printing.
/// </summary>
/// <param name="bounds">The bounds.</param>
/// <param name="transform">The transform.</param>
/// <param name="inverseTransform">The inverse transform.</param>
/// <exception cref="System.ArgumentOutOfRangeException"></exception>
private void GetPrintTransform(
Numerics.Rectangle bounds,
out Matrix3x2 transform,
out Matrix3x2 inverseTransform)
{
float minDim = Math.Min(bounds.Width, bounds.Height);
Vector2 center = bounds.Center;
Matrix3x2 scale = Matrix3x2.CreateScale((minDim * _zoom) / 10000f, center);
Matrix3x2 invScale = Matrix3x2.CreateScale(10000f / (minDim * _zoom), center);
Matrix3x2 centerTranslate = Matrix3x2.CreateTranslation(center);
Matrix3x2 invCenterTranslate = Matrix3x2.CreateTranslation(-center);
Matrix3x2 translate, invTranslate;
switch (_printDocument.PrintMode)
{
case TilingPrintMode.TilingFull:
case TilingPrintMode.TilingLines:
translate = Matrix3x2.CreateTranslation(_bounds.Center);
invTranslate = Matrix3x2.CreateTranslation(-_bounds.Center);
break;
case TilingPrintMode.SingleTileFull:
case TilingPrintMode.SingleTileLines:
Debug.Assert(_printDocument.Tile != null, "_printDocument.Tile != null");
Vector2 centroid = _printDocument.Tile.Centroid;
translate = Matrix3x2.CreateTranslation(centroid);
invTranslate = Matrix3x2.CreateTranslation(-centroid);
break;
default:
throw new ArgumentOutOfRangeException();
}
transform = centerTranslate * translate * scale;
inverseTransform = invScale * invTranslate * invCenterTranslate;
}
