public Hatch(HatchPattern pattern, IEnumerable <HatchBoundaryPath> paths, bool associative)
: base(EntityType.Hatch, DxfObjectCode.Hatch)
{
if (pattern == null)
{
throw new ArgumentNullException(nameof(pattern));
}
this.pattern = pattern;
if (paths == null)
{
throw new ArgumentNullException(nameof(paths));
}
this.boundaryPaths = new ObservableCollection <HatchBoundaryPath>();
this.boundaryPaths.BeforeAddItem += this.BoundaryPaths_BeforeAddItem;
this.boundaryPaths.AddItem += this.BoundaryPaths_AddItem;
this.boundaryPaths.BeforeRemoveItem += this.BoundaryPaths_BeforeRemoveItem;
this.boundaryPaths.RemoveItem += this.BoundaryPaths_RemoveItem;
foreach (HatchBoundaryPath path in paths)
{
if (!associative)
{
path.ClearContour();
}
this.boundaryPaths.Add(path);
}
this.associative = associative;
}
public virtual object Clone()
{
HatchPattern copy = new HatchPattern(this.name, this.description)
{
Style = this.style,
Fill = this.fill,
Type = this.type,
Origin = this.origin,
Angle = this.angle,
Scale = this.scale,
};
foreach (HatchPatternLineDefinition def in this.lineDefinitions)
{
copy.LineDefinitions.Add((HatchPatternLineDefinition)def.Clone());
}
return(copy);
}
public static HatchPattern FromFile(string file, string patternName)
{
HatchPattern pattern = null;
using (StreamReader reader = new StreamReader(File.Open(file, FileMode.Open, FileAccess.Read, FileShare.ReadWrite), true))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading pat file.", file);
}
// lines starting with semicolons are comments
if (line.StartsWith(";"))
{
continue;
}
// every pattern definition starts with '*'
if (!line.StartsWith("*"))
{
continue;
}
// reading pattern name and description
int endName = line.IndexOf(','); // the first semicolon divides the name from the description that might contain more semicolons
string name = line.Substring(1, endName - 1);
string description = line.Substring(endName + 1, line.Length - endName - 1);
// remove start and end spaces
description = description.Trim();
if (!name.Equals(patternName, StringComparison.OrdinalIgnoreCase))
{
continue;
}
// we have found the pattern name, the next lines of the file contains the pattern definition
line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading pat file.", file);
}
pattern = new HatchPattern(name, description);
while (!reader.EndOfStream && !line.StartsWith("*") && !string.IsNullOrEmpty(line))
{
string[] tokens = line.Split(',');
double angle = double.Parse(tokens[0]);
Vector2 origin = new Vector2(double.Parse(tokens[1]), double.Parse(tokens[2]));
Vector2 delta = new Vector2(double.Parse(tokens[3]), double.Parse(tokens[4]));
HatchPatternLineDefinition lineDefinition = new HatchPatternLineDefinition
{
Angle = angle,
Origin = origin,
Delta = delta,
};
// the rest of the info is optional if it exists define the dash pattern definition
for (int i = 5; i < tokens.Length; i++)
{
lineDefinition.DashPattern.Add(double.Parse(tokens[i]));
}
pattern.LineDefinitions.Add(lineDefinition);
pattern.Type = HatchType.UserDefined;
line = reader.ReadLine();
if (line == null)
{
throw new FileLoadException("Unknown error reading pat file.", file);
}
line = line.Trim();
}
// there is no need to continue parsing the file, the info has been read
break;
}
}
return(pattern);
}