/// <summary>
/// Creates a new instance of Symbol
/// </summary>
public Symbol()
{
_size = new Size2D(4,4);
_offset = new Position2D(0,0);
}
/// <summary>
/// Only copies the shared placement aspects (Size, Offset, Angle) from the specified symbol.
/// </summary>
/// <param name="symbol">The symbol to copy values from.</param>
public void CopyPlacement(ISymbol symbol)
{
if (_innerSymbol != null)
{
_innerSymbol.CopyPlacement(symbol);
return;
}
_size = symbol.Size.Copy();
_offset = symbol.Offset.Copy();
_angle = symbol.Angle;
}
/// <summary>
/// Calculates a size that would be necessary to contain the entire symbol, taking rotation and
/// offset into account.
/// </summary>
/// <returns></returns>
public Size2D GetBoundingSize()
{
if (_innerSymbol != null)
{
return _innerSymbol.GetBoundingSize();
}
// x and y represent the magnitude of the separation from the center
double x = 0;
double y =0;
double dx = _size.Width / 2;
double dy = _size.Height /2;
Position2D[] corners = new Position2D[4];
corners[TOP_LEFT] = new Position2D(-dx, dy);
corners[TOP_RIGHT] = new Position2D(dx, dy);
corners[BOTTOM_LEFT] = new Position2D(-dx, -dy);
corners[BOTTOM_RIGHT] = new Position2D(dx, -dy);
double radians = _angle * Math.PI / 180;
for(int i = 0; i < 4; i++)
{
Position2D corner = corners[i];
Position2D rotated = new Position2D();
rotated.X = corner.X * Math.Cos(radians) - corner.Y * Math.Sin(radians);
rotated.Y = corner.X * Math.Sin(radians) + corner.Y * Math.Cos(radians);
Position2D shifted = new Position2D();
shifted.X = rotated.X + _offset.X;
shifted.Y = rotated.Y + _offset.Y;
if (Math.Abs(shifted.X) > x) x = Math.Abs(shifted.X);
if (Math.Abs(shifted.Y) > y) y = Math.Abs(shifted.Y);
}
// Since x and y represent a "distance" from (0,0), the size has to be twice that.
return new Size2D(2*x, 2*y);
}
/// <summary>
/// Creates a new instance of PicturePattern
/// </summary>
public PicturePattern()
{
_scale = new Position2D(1, 1);
_wrapMode = WrapMode.Tile;
_dialogFilter = "Image Files|*.bmp;*.gif;*.jpg;*.png;*.tif;*.ico";
}
