public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
{
drawArea.Cursor = Cursor;
if (e.Button != MouseButtons.Left)
{
return;
}
if (newPolygon == null)
{
return;
}
Point point = new Point(e.X, e.Y);
int distance = (e.X - lastX) * (e.X - lastX) + (e.Y - lastY) * (e.Y - lastY);
if (distance < minDistance)
{
newPolygon.MoveHandleTo(point, newPolygon.HandleCount);
}
else
{
newPolygon.AddPoint(point);
lastX = e.X;
lastY = e.Y;
}
drawArea.Refresh();
}
/// <summary>
/// Mouse move - resize new polygon
/// </summary>
/// <param name="drawArea"></param>
/// <param name="e"></param>
public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
{
drawArea.Cursor = Cursor;
if (e.Button != MouseButtons.Left)
{
return;
}
if (newPolygon == null)
{
return; // precaution
}
Point point = new Point(e.X, e.Y);
int distance = (e.X - lastX) * (e.X - lastX) + (e.Y - lastY) * (e.Y - lastY);
if (distance < minDistance)
{
// Distance between last two points is less than minimum -
// move last point
newPolygon.MoveHandleTo(point, newPolygon.HandleCount);
}
else
{
// Add new point
newPolygon.AddPoint(point);
lastX = e.X;
lastY = e.Y;
}
drawArea.Refresh();
}
/// <summary>
/// Reduce the number of points in a polygon.
/// </summary>
/// <param name="Points">The points.</param>
/// <param name="Tolerance">The tolerance.</param>
/// <returns></returns>
public static DrawPolygon ReductionPolygon(List <PointF> Points, Double Tolerance)
{
Int32 firstPoint = 0;
Int32 lastPoint = Points.Count - 1;
List <Int32> pointIndexsToKeep = new List <Int32>();
//Add the first and last index to the keepers
pointIndexsToKeep.Add(firstPoint);
pointIndexsToKeep.Add(lastPoint);
//The first and the last PointF can not be the same
while (Points[firstPoint].Equals(Points[lastPoint]))
{
lastPoint--;
}
Reduction(Points, firstPoint, lastPoint, Tolerance, ref pointIndexsToKeep);
DrawPolygon returnPolygon = new DrawPolygon();
Point point;
pointIndexsToKeep.Sort();
foreach (Int32 index in pointIndexsToKeep)
{
point = new Point();
point.X = (int)Points[index].X;
point.Y = (int)Points[index].Y;
returnPolygon.AddPoint(point);
}
return(returnPolygon);
}
/// <summary>
/// Change mokkan extraction parameters
/// </summary>
private void ChangeExtraction()
{
if (_init)
{
return;
}
this.Cursor = Cursors.WaitCursor;
List <Boundary> bounds = MokkanExtraction.BoundaryTracking(_binBmp, _bndRec);
// get top regions
List <int> tops = new List <int>();
GetTopAreas(bounds, _mokkanNum, tops);
// number of regions
int n = Math.Min(_mokkanNum, tops.Count - 1);
DrawPolygon reducePolygon;
MkaMokkanInfo.LastRBangou -= _list.Count;
_list.Clear();
Bitmap ret = (Bitmap)_oriBmp.Clone();
Graphics g = Graphics.FromImage(ret);
g.DrawRectangle(Pens.Red, _bndRec);
for (int i = 0; i < n; i++)
{
if (_tolerance == 0)
{
reducePolygon = new DrawPolygon();
foreach (PointF p in bounds[tops[i]].Points)
{
reducePolygon.AddPoint(new Point((int)p.X, (int)p.Y));
}
}
else
{
// get reduce polygon
reducePolygon = PolygonApproximation.ReductionPolygon(bounds[tops[i]].Points, _tolerance);
}
_list.Add(reducePolygon);
MkaMokkanInfo.LastRBangou++;
g.DrawPolygon(_pen, bounds[tops[i]].Points.ToArray());
g.FillPolygon(_brush, bounds[tops[i]].Points.ToArray());
}
g.Dispose();
bounds.Clear();
tops.Clear();
if (picImageView.Image != null)
{
picImageView.Image.Dispose();
}
picImageView.Image = ret;
this.Cursor = Cursors.Default;
}