// 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);
}
// caculate horizontal line length
private double CalculateHorizontalLine(DrawingModel.Point startPoint, DrawingModel.Point endPoint)
{
double length = startPoint.GetLeftDifference(endPoint);
double width = startPoint.GetTopDifference(endPoint);
double horizontalLine = 0;
if (IsLengthBiggerThanWidth(length, width))
{
horizontalLine = GetHorizontalLineWithBiggerLength(length, width);
}
else
{
horizontalLine = GetHorizontalLineWithBiggerWidth(length, width);
}
return(horizontalLine);
}
// use side to calculate point's position
private Windows.Foundation.Point CalculatePointPosition(int side, double horizontalLine, DrawingModel.Point startPoint, DrawingModel.Point endPoint)
{
double left = 0;
double top = 0;
double length = startPoint.GetLeftDifference(endPoint);
double width = startPoint.GetTopDifference(endPoint);
if (side % Constant.THREE == 0)
{
left = (side == 0) ? length : 0;
top = width / Constant.TWO;
}
else
{
left = (side % Constant.TWO == 0) ? length - horizontalLine : horizontalLine;
top = (side < Constant.THREE) ? 0 : width;
}
DetermineAbsolutePosition(ref left, ref top, startPoint, endPoint);
return(new Windows.Foundation.Point((float)left, (float)top));
}