//
// helper methods
//
#region protected virtual void BuildPath(PDFGraphicsPath path, PDFPoint[] points, PDFStyle style, bool end)
/// <summary>
/// Adds a series of lines to the path based on the points. Moving to the first in the array, adding lines after, and optionally closing and ending the path.
/// </summary>
/// <param name="path">The path to build the lines in</param>
/// <param name="points">The points to add lines between</param>
/// <param name="close">Closes the path (adds an extra line back to the starting point</param>
/// <param name="end">If true then ends the path so no more points can be added to it</param>
protected virtual void BuildPath(PDFGraphicsPath path, PDFPoint[] points, Style style, bool end)
{
if (path.HasCurrentPath == false)
{
path.BeginPath();
}
for (int i = 0; i < points.Length; i++)
{
if (i == 0)
{
path.MoveTo(points[i]);
}
else
{
path.LineTo(points[i]);
}
}
bool closed = style.GetValue(StyleKeys.ShapeClosedKey, true);
if (closed)
{
path.ClosePath(end);
}
else if (end)
{
path.EndPath();
}
}
public void BeginPath_Test()
{
PDFGraphicsPath target = new PDFGraphicsPath();
Assert.IsTrue(target.Paths.Count == 1);
Assert.IsTrue(target.HasCurrentPath);
target.BeginPath();
Assert.IsTrue(target.HasCurrentPath);
Assert.IsTrue(target.Paths.Count == 2);
Assert.AreEqual(target.CurrentPath.Count, 0);
}
protected virtual void BuildPolygramPath(PDFGraphicsPath path, PDFPoint[] points, int step, bool closed, bool end)
{
if (points.Length < 5)
{
throw new PDFException(Errors.CannotCreatePolygramWithLessThan5Sides, null);
}
if (step >= points.Length)
{
throw new PDFException(Errors.StepCountCannotBeGreaterThanVertexCount);
}
bool[] visited = new bool[points.Length];
int loopcount = 0;
int firstFree = 0;
//checks the integer array of see if everyone has been covered
Func <bool> visitedAll = delegate()
{
for (int i = 0; i < visited.Length; i++)
{
if (visited[i] == false)
{
firstFree = i;
return(false);
}
}
return(true);
};
while (!visitedAll() && loopcount < 10)
{
if (path.HasCurrentPath == false)
{
path.BeginPath();
}
int index = firstFree; //firstFree is set from the visitedAll method
PDFPoint first = points[index];
PDFPoint current = first;
path.MoveTo(current);
do
{
index += step;
if (index >= points.Length)
{
index -= points.Length;
}
current = points[index];
visited[index] = true; //mark the point as visited.
if (current == first)
{
if (closed)
{
path.ClosePath(end);
}
else if (end)
{
path.EndPath();
}
}
else
{
path.LineTo(current);
}
} while (current != first);
path.EndPath();
loopcount++;
}
}
