/// <summary>
/// ''' 画双线
/// ''' </summary>
/// ''' <param name="g">Graphics对象</param>
/// ''' <remarks></remarks>
public override void Draw(System.Drawing.Graphics g)
{
Point eb, ee; // 设备坐标下的线段起点，终点
PointF ebF, eeF; // 实际坐标下的线段起点，终点
PointF ebF2, eeF2; // 实际坐标下的线段起点，终点(双线)
ebF = new PointF(mStartPt.X, mStartPt.Y);
eeF = new PointF(mEndPt.X, mEndPt.Y);
double angleA = GetAngle(ebF, eeF); // 求直线倾角(0-2Pi）
double d = BaseFunction.DPToRP(4); // 直线偏移距离(4个像素)
ebF2 = new PointF((float)(ebF.X + d * Math.Sin(angleA)), (float)(ebF.Y + d * Math.Cos(angleA)));
eeF2 = new PointF((float)(eeF.X + d * Math.Sin(angleA)), (float)(eeF.Y + d * Math.Cos(angleA)));
eb = BaseFunction.RPToDP(ebF);
ee = BaseFunction.RPToDP(eeF);
Pen pen = new Pen(Color, 1.0f);
g.DrawLine(pen, eb, ee); // 画第1条线
eb = BaseFunction.RPToDP(ebF2);
ee = BaseFunction.RPToDP(eeF2);
g.DrawLine(pen, eb, ee); // 画第2条线
}
// 初始化
private void Initl()
{
int parts = 5; // 坐标分段数（坐标范围小的轴)
PointF startPtF = new PointF(mPointSW.X, mPointSW.Y); // 坐标原点（实际坐标)
Point startPt = BaseFunction.RPToDP(startPtF); // 中心点（设备坐标)
PointF endPtF = new PointF(mPointNE.X, mPointNE.Y); // 坐标轴最大点（实际坐标)
Point endPt = BaseFunction.RPToDP(endPtF); // 坐标轴最大点（设备坐标)
// 坐标轴范围内缩30个像素
int offsetVal = 30;
startPt.X += offsetVal;
startPt.Y -= offsetVal;
endPt.X -= offsetVal;
endPt.Y += offsetVal;
// 再转回实际坐标
startPtF = BaseFunction.DPToRP(startPt);
endPtF = BaseFunction.DPToRP(endPt);
mOPoint.X = (float)(Math.Ceiling(startPtF.X / (double)10) * 10);
mOPoint.Y = (float)(Math.Ceiling(startPtF.Y / (double)10) * 10);
mMaxX = (float)(Math.Ceiling(endPtF.X / (double)10) * 10);
mMaxY = (float)(Math.Ceiling(endPtF.Y / (double)10) * 10);
double lenX = endPtF.X - mOPoint.X;
double lenY = endPtF.Y - mOPoint.Y;
if (lenX < lenY)
{
mXParts = parts;
mLen = Math.Floor(lenX / (double)(parts * 10)) * 10; // 刻度间隔长度,取整10
mYParts = (int)Math.Ceiling(lenY / (double)mLen);
}
else
{
mYParts = parts;
mLen = Math.Floor(lenY / (double)(parts * 10)) * 10; // 刻度间隔长度,取整10
mXParts = (int)Math.Ceiling(lenX / (double)mLen);
}
}
