/// <summary>
/// 绘制直角坐标通用网格线
/// </summary>
/// <param name="g"></param>
/// <param name="gd"></param>
/// <param name="xa"></param>
/// <param name="ya"></param>
private void AddGirdSquare(Graphics g, Grid gd, XAxis xa, YAxis ya)
{
float fX, fY;
Pen aPen = new Pen(gd.GridColor, gd.GridThickness);
aPen.DashStyle = gd.GridPattern;
//绘制垂直格网：
if (gd.IsYGrid == true)
{
for (fX = xa.XLimMin + xa.XTick; fX < xa.XLimMax; fX += xa.XTick)
{
fX = DataDeal.FloatAccur(fX);
//注：float类型变量的精度损失处理
g.DrawLine(aPen, Point2D(new PointF(fX, ya.YLimMin), xa, ya), Point2D(new PointF(fX, ya.YLimMax), xa, ya));
}
}
//绘制水平格网：
if (gd.IsXGrid == true)
{
for (fY = ya.YLimMin + ya.YTick; fY < ya.YLimMax; fY += ya.YTick)
{
fY = DataDeal.FloatAccur(fY);
g.DrawLine(aPen, Point2D(new PointF(xa.XLimMin, fY), xa, ya), Point2D(new PointF(xa.XLimMax, fY), xa, ya));
}
}
aPen.Dispose();
}
/// <summary>
/// 默认tick标记内容
/// </summary>
private void defaultRMark()
{
int count = (int)Math.Floor(360 / AngleStep);
if (count < 1 || count > 720)
{
return;
}
rMark = new string[count];
float angleTick = 0;
for (int i = 0; i < count; i++)
{
if (AngleDirection == PolarCharts.AngleDirectionEnum.ClockWise)
{
angleTick = i * AngleStep;
}
else if (AngleDirection == PolarCharts.AngleDirectionEnum.CounterClockWise)
{
angleTick = 360 - i * AngleStep;
if (i == 0)
{
angleTick = 0;
}
}
rMark[i] = DataDeal.FloatAccur(angleTick).ToString();
}
setRMarkFull();
}
/// <summary>
/// 初始化样式布局（默认为直角坐标，无图例）
/// </summary>
/// <param name="g"></param>
/// <param name="xa"></param>
/// <param name="ya"></param>
/// <param name="y2a"></param>
/// <param name="gd"></param>
/// <param name="lb"></param>
/// <param name="tl"></param>
internal void AddChartStyle(Graphics g, Title tl, XYLabel lb, Grid gd, XAxis xa, YAxis ya, Y2Axis y2a)
{
//设置绘图区位置、大小
SetPlotArea(g, tl, lb, gd, xa, ya, y2a);
//ChartArea和PlotArea底色绘制（通用）
FillColorInChartAreas(g);
//直角坐标通用网格线
AddGirdSquare(g, gd, xa, ya);
//绘制x，y,y2 轴刻度线和标记
float fX, fY;
SolidBrush aBrush = new SolidBrush(xa.XTickStyle.TextColor);
for (fX = xa.XLimMin; fX <= xa.XLimMax; fX += xa.XTick)
{
fX = DataDeal.FloatAccur(fX);
PointF yAxisPoint = Point2D(new PointF(fX, ya.YLimMin), xa, ya);
g.DrawLine(Pens.Black, yAxisPoint, new PointF(yAxisPoint.X, yAxisPoint.Y - 5f));
StringFormat sFormat = new StringFormat();
sFormat.Alignment = StringAlignment.Far;
SizeF sizeXTick = g.MeasureString(fX.ToString(), xa.XTickStyle.TextFont);
g.DrawString(fX.ToString(), xa.XTickStyle.TextFont, aBrush, new PointF(yAxisPoint.X + sizeXTick.Width / 2, yAxisPoint.Y + 4f), sFormat);
}
aBrush = new SolidBrush(ya.YTickStyle.TextColor);
SizeF tickFontSize = g.MeasureString("A", ya.YTickStyle.TextFont);
for (fY = ya.YLimMin; fY <= ya.YLimMax; fY += ya.YTick)
{
fY = DataDeal.FloatAccur(fY);
PointF xAxisPoint = Point2D(new PointF(xa.XLimMin, fY), xa, ya);
g.DrawLine(Pens.Black, xAxisPoint, new PointF(xAxisPoint.X + 5f, xAxisPoint.Y));
StringFormat sFormat = new StringFormat();
sFormat.Alignment = StringAlignment.Far;
g.DrawString(fY.ToString(), ya.YTickStyle.TextFont, aBrush, new PointF(xAxisPoint.X - 3f, xAxisPoint.Y - tickFontSize.Height / 2), sFormat);
}
if (y2a.IsY2Axis)
{
aBrush = new SolidBrush(y2a.Y2TickStyle.TextColor);
tickFontSize = g.MeasureString("A", y2a.Y2TickStyle.TextFont);
for (fY = y2a.Y2LimMin; fY <= y2a.Y2LimMax; fY += y2a.Y2Tick)
{
fY = DataDeal.FloatAccur(fY);
PointF x2AxisPoint = Point2DY2(new PointF(xa.XLimMax, fY), xa, y2a);
g.DrawLine(Pens.Black, x2AxisPoint, new PointF(x2AxisPoint.X - 5f, x2AxisPoint.Y));
StringFormat sFormat = new StringFormat();
sFormat.Alignment = StringAlignment.Near;
g.DrawString(fY.ToString(), y2a.Y2TickStyle.TextFont, aBrush, new PointF(x2AxisPoint.X + 3f, x2AxisPoint.Y - tickFontSize.Height / 2), sFormat);
}
}
aBrush.Dispose();
AddTitle(g, tl);
AddLabels(g, tl, lb, y2a);
}
private void AddTicksPolar(Graphics g, RAxis ra)
{
SolidBrush aBrush = new SolidBrush(ra.RTickStyle.TextColor);
StringFormat sFormat = new StringFormat();
float xc = polarArea.X + polarArea.Width / 2;
float yc = polarArea.Y + polarArea.Height / 2;
int tickCount = Convert.ToInt32(Math.Ceiling((ra.RMax - ra.RMin) / ra.RTick));
float dr = polarArea.Width / 2 / tickCount;
// Draw the radius labels:值标记
sFormat.Alignment = StringAlignment.Near;
for (int i = 0; i <= tickCount; i++)
{
float fY = ra.RMin + i * ra.RTick;
fY = DataDeal.FloatAccur(fY);
g.DrawString(fY.ToString(), ra.RTickStyle.TextFont, aBrush, new PointF(xc, yc - i * dr - 0.2f * dr), sFormat);
}
// Draw the angle labels:方向标记
sFormat.Alignment = StringAlignment.Center;
SizeF tickFontSize = g.MeasureString("A", ra.RTickStyle.TextFont);
float angleLabel = 0;
int angledir = 1;
for (int i = 0; i < (int)360 / ra.AngleStep; i++)
{
if (ra.AngleDirection == PolarCharts.AngleDirectionEnum.ClockWise)
{
angledir = 1;
}
else if (ra.AngleDirection == PolarCharts.AngleDirectionEnum.CounterClockWise)
{
angledir = -1;
}
float x = (RNorm(ra.RMax, ra) + polarArea.Width / 10f * 2 / 3) * (float)Math.Cos((ra.StartAngle + i * ra.AngleStep) * angledir * Math.PI / 180) + xc;
float y = (RNorm(ra.RMax, ra) + polarArea.Width / 10f * 2 / 3) * (float)Math.Sin((ra.StartAngle + i * ra.AngleStep) * angledir * Math.PI / 180) + yc;
g.DrawString(ra.RMarkFull[i].ToString(), ra.RTickStyle.TextFont, aBrush,
new PointF(x, y - tickFontSize.Height / 2), sFormat);
}
}
/// <summary>
/// 绘制刻度线和标记（受数据影响）
/// </summary>
/// <param name="g"></param>
/// <param name="lb"></param>
/// <param name="xa"></param>
/// <param name="ya"></param>
/// <param name="y2a"></param>
private void AddTicks(Graphics g, XYLabel lb, XAxis xa, YAxis ya, Y2Axis y2a)
{
float fX, fY;
//绘制x轴刻度线和标记：
SolidBrush aBrush = new SolidBrush(xa.XTickStyle.TextColor);
SizeF sizeXTick;
//出现在SetPlotArea和AddTicks中轴循环
//for(float xTick = xa.XLimMin; xTick <= xa.XLimMax; xTick += xa.XTick)
//弃用原因1：防止Tick为0时出现死循环
//弃用原因2：float的精度损失程度累加
int count = (int)Math.Round((xa.XLimMax - xa.XLimMin) / xa.XTick) + 1;
for (int i = 0; i < count; i++)
{
fX = xa.XLimMin + i * xa.XTick;
fX = DataDeal.FloatAccur(fX);
PointF yAxisPoint = Point2D(new PointF(fX, ya.YLimMin), xa, ya);
g.DrawLine(Pens.Black, yAxisPoint, new PointF(yAxisPoint.X, yAxisPoint.Y - 5f));
StringFormat sFormat = new StringFormat();
sFormat.Alignment = StringAlignment.Far;
sizeXTick = g.MeasureString(xa.XTickMarkFull[i], xa.XTickStyle.TextFont);
if (xa.XTickAngle != 0)
{
g.TranslateTransform(yAxisPoint.X, yAxisPoint.Y); //设置旋转中心为文字中心
g.RotateTransform(xa.XTickAngle); //旋转
//g.TranslateTransform(-yAxisPoint.X, -yAxisPoint.Y);
g.DrawString(xa.XTickMarkFull[i], xa.XTickStyle.TextFont, aBrush, new PointF(0, 4f - sizeXTick.Height / 2), sFormat);
g.ResetTransform();
}
else
{
g.DrawString(xa.XTickMarkFull[i], xa.XTickStyle.TextFont, aBrush, new PointF(yAxisPoint.X + sizeXTick.Width / 2, yAxisPoint.Y + 4f), sFormat);
}
}
SizeF tickFontSize = g.MeasureString("A", ya.YTickStyle.TextFont);
//绘制y轴刻度线和标记：
int ycount = (int)Math.Round((ya.YLimMax - ya.YLimMin) / ya.YTick) + 1;
for (int i = 0; i < ycount; i++)
{
fY = ya.YLimMin + i * ya.YTick;
fY = DataDeal.FloatAccur(fY);
PointF xAxisPoint = Point2D(new PointF(xa.XLimMin, fY), xa, ya);
g.DrawLine(Pens.Black, xAxisPoint, new PointF(xAxisPoint.X + 5f, xAxisPoint.Y));
StringFormat sFormat = new StringFormat();
sFormat.Alignment = StringAlignment.Far;
g.DrawString(fY.ToString(), ya.YTickStyle.TextFont, aBrush, new PointF(xAxisPoint.X - 3f, xAxisPoint.Y - tickFontSize.Height / 2), sFormat);
}
//绘制y2轴刻度线和标记：
if (y2a.IsY2Axis)
{
int y2count = (int)Math.Round((y2a.Y2LimMax - y2a.Y2LimMin) / y2a.Y2Tick) + 1;
for (int i = 0; i < y2count; i++)
{
fY = y2a.Y2LimMin + i * y2a.Y2Tick;
fY = DataDeal.FloatAccur(fY);
PointF x2AxisPoint = Point2DY2(new PointF(xa.XLimMax, fY), xa, y2a);
g.DrawLine(Pens.Black, x2AxisPoint, new PointF(x2AxisPoint.X - 5f, x2AxisPoint.Y));
StringFormat sFormat = new StringFormat();
sFormat.Alignment = StringAlignment.Near;
g.DrawString(fY.ToString(), y2a.Y2TickStyle.TextFont, aBrush, new PointF(x2AxisPoint.X + 3f, x2AxisPoint.Y - tickFontSize.Height / 2), sFormat);
}
}
aBrush.Dispose();
}
/// <summary>
/// 设置默认绘图区位置，大小（无图例影响的默认位置）
/// </summary>
/// <param name="g"></param>
/// <param name="xa"></param>
/// <param name="ya"></param>
/// <param name="y2a"></param>
/// <param name="gd"></param>
/// <param name="lb"></param>
/// <param name="tl"></param>
private void SetPlotArea(Graphics g, Title tl, XYLabel lb, Grid gd, XAxis xa, YAxis ya, Y2Axis y2a)
{
SizeF titleFontSize = g.MeasureString("A", tl.TitleStyle.TextFont);
if (string.IsNullOrWhiteSpace(tl.TitleName) || tl.TitleName.ToUpper() == "NO TITLE")
{
titleFontSize.Width = 8f;
titleFontSize.Height = 8f;
}
float xSpacing = XOffset / 2.0f;
float ySpacing = YOffset / 2.0f;
SizeF tickFontSize = g.MeasureString("A", xa.XTickStyle.TextFont);
float tickSpacing = 2f;
//获取y轴标记宽度
SizeF yTickSize = g.MeasureString(ya.YLimMin.ToString(), ya.YTickStyle.TextFont);
int ycount = (int)Math.Round((ya.YLimMax - ya.YLimMin) / ya.YTick) + 1;
for (int i = 0; i < ycount; i++)
{
float yTick = ya.YLimMin + i * ya.YTick;
yTick = DataDeal.FloatAccur(yTick);
SizeF tempSize = g.MeasureString(yTick.ToString(), ya.YTickStyle.TextFont);
if (yTickSize.Width < tempSize.Width)
{
yTickSize = tempSize;
}
}
SizeF labelFontSize = g.MeasureString("A", lb.XYLabelStyle.TextFont);
float leftMargin = XOffset + labelFontSize.Height + xSpacing + yTickSize.Width + tickSpacing;
float rightMargin = 2 * XOffset;
float topMargin = YOffset + titleFontSize.Height + ySpacing;
float bottomMargin = YOffset + labelFontSize.Height + ySpacing + tickFontSize.Height + tickSpacing;
//单y轴绘图区大小
int plotX = ChartArea.X + (int)leftMargin;
int plotY = ChartArea.Y + (int)topMargin;
int plotHeight = ChartArea.Height - (int)topMargin - (int)bottomMargin;
int plotWidth = ChartArea.Width - (int)leftMargin - (int)rightMargin;
//双y轴：重新定义绘图区宽度
if (y2a.IsY2Axis)
{
//y2轴标记宽度
SizeF y2TickSize = g.MeasureString(y2a.Y2LimMin.ToString(), y2a.Y2TickStyle.TextFont);
int y2count = (int)Math.Round((y2a.Y2LimMax - y2a.Y2LimMin) / y2a.Y2Tick) + 1;
for (int i = 0; i < ycount; i++)
{
float y2Tick = y2a.Y2LimMin + i * y2a.Y2Tick;
y2Tick = DataDeal.FloatAccur(y2Tick);
SizeF tempSize2 = g.MeasureString(y2Tick.ToString(), y2a.Y2TickStyle.TextFont);
if (y2TickSize.Width < tempSize2.Width)
{
y2TickSize = tempSize2;
}
}
rightMargin = XOffset + labelFontSize.Height + xSpacing + y2TickSize.Width + tickSpacing;
plotWidth = ChartArea.Width - (int)leftMargin - (int)rightMargin;
}
plotArea = new Rectangle(plotX, plotY, plotWidth, plotHeight);
}
