// </snippet2>
// Snippet for: M:System.Drawing.Drawing2D.GraphicsPathIterator.HasCurve
// <snippet3>
private void HasCurveExample(PaintEventArgs e)
{
// Create a path and add three lines,
// a rectangle and an ellipse.
GraphicsPath myPath = new GraphicsPath();
Point[] myPoints = { new Point(20, 20), new Point(120, 120),
new Point(20, 120), new Point(20, 20) };
Rectangle myRect = new Rectangle(120, 120, 100, 100);
myPath.AddLines(myPoints);
myPath.AddRectangle(myRect);
myPath.AddEllipse(220, 220, 100, 100);
// Create a GraphicsPathIterator for myPath.
GraphicsPathIterator myPathIterator = new
GraphicsPathIterator(myPath);
// Test for a curve.
bool myHasCurve = myPathIterator.HasCurve();
// Show the test result.
MessageBox.Show(myHasCurve.ToString());
}
public virtual void HasCurve()
{
GraphicsPath path = new GraphicsPath();
GraphicsPathIterator iterator = new GraphicsPathIterator(path);
Assert.IsFalse(iterator.HasCurve());
path.AddLine(new Point(100, 100), new Point(400, 100));
path.AddLine(new Point(400, 200), new Point(10, 100));
iterator = new GraphicsPathIterator(path);
Assert.IsFalse(iterator.HasCurve());
path.StartFigure();
path.AddBezier(10, 10, 50, 250, 100, 5, 200, 280);
path.StartFigure();
path.AddRectangle(new Rectangle(10, 20, 300, 400));
path.StartFigure();
path.AddLine(new Point(400, 400), new Point(400, 10));
iterator = new GraphicsPathIterator(path);
Assert.IsTrue(iterator.HasCurve());
}
public void HasCurve_ReturnsExpected()
{
Point[] points = new Point[] { new Point(1, 1), new Point(2, 2), new Point(3, 3), new Point(4, 4) };
byte[] types = new byte[] { 0, 3, 3, 3 };
using (GraphicsPath gp = new GraphicsPath(points, types))
using (GraphicsPath gpEmpty = new GraphicsPath())
using (GraphicsPathIterator gpi = new GraphicsPathIterator(gp))
using (GraphicsPathIterator gpiEmpty = new GraphicsPathIterator(gpEmpty))
using (GraphicsPathIterator gpiNull = new GraphicsPathIterator(null))
{
Assert.True(gpi.HasCurve());
Assert.False(gpiEmpty.HasCurve());
Assert.False(gpiNull.HasCurve());
}
}
///<summary>
/// Extracts the points of the paths in a flat {@link PathIterator} into
/// a list of Coordinate arrays.
///</summary>
/// <param name="pathIt">A path iterator</param>
/// <returns>A list of coordinate arrays</returns>
/// <exception cref="ArgumentException">If a non-linear segment type is encountered</exception>
public static IList <Coordinate[]> ToCoordinates(GraphicsPathIterator pathIt)
{
if (pathIt.HasCurve())
{
throw new ArgumentException("Path must not have non-linear segments");
}
var coordArrays = new List <Coordinate[]>();
int startIndex, endIndex;
bool isClosed;
while (pathIt.NextSubpath(out startIndex, out endIndex, out isClosed) > 0)
{
Coordinate[] pts = NextCoordinateArray(pathIt, startIndex, endIndex, isClosed);
coordArrays.Add(pts);
if (endIndex == pathIt.Count - 1)
{
break;
}
}
return(coordArrays);
}
