// 創建 rectangle
private RectangleF GetRectangle(DrawingModel.Point startPoint, DrawingModel.Point endPoint)
{
float left = (float)startPoint.GetSmallLeft(endPoint);
float top = (float)startPoint.GetSmallTop(endPoint);
float width = (float)startPoint.GetLeftDifference(endPoint);
float height = (float)startPoint.GetTopDifference(endPoint);
return(new RectangleF(new PointF(left, top), new SizeF(new PointF(width, height))));
}
// 判斷是否在 2 point 的 range 內
public bool IsInRange(Point startPoint, Point endPoint)
{
double left = startPoint.GetSmallLeft(endPoint);
double top = startPoint.GetSmallTop(endPoint);
double width = startPoint.GetLeftDifference(endPoint);
double height = startPoint.GetTopDifference(endPoint);
return(_left >= left && _left <= left + width &&
_top >= top && _top <= top + height);
}
// 取得 4 個corner 的圓座標
private List <DrawingModel.Point> GetCornerPointsPosition(DrawingModel.Point startPoint, DrawingModel.Point endPoint)
{
List <DrawingModel.Point> points = new List <DrawingModel.Point>();
for (int count = 0; count < Constant.FOUR; count++)
{
double left = (count % Constant.TWO == 0) ? startPoint.GetSmallLeft(endPoint) : startPoint.GetBigLeft(endPoint);
double top = (count / Constant.TWO == 0) ? startPoint.GetSmallTop(endPoint) : startPoint.GetBigTop(endPoint);
left -= Constant.MARK_CIRCLE_RADIUS;
top -= Constant.MARK_CIRCLE_RADIUS;
points.Add(new DrawingModel.Point(left, top));
}
return(points);
}
// Determine the position on canvas
private void DetermineAbsolutePosition(ref double left, ref double top, DrawingModel.Point startPoint, DrawingModel.Point endPoint)
{
left += startPoint.GetSmallLeft(endPoint);
top += startPoint.GetSmallTop(endPoint);
}