//绘制MARK点
internal static void Draw(Graphics g,
Channels chnls,
ChannelMark[] mrks,
AixsVisibleArea ava,
ChannelPictureArea cpa,
Font mrkFont)
{
int k = 0;
//扫描mrks中所有的点
for (int i = 0; i < mrks.Length; i++)
{
//第i个MARK点，可见，则绘制它
//并且根据不同的MarkType，绘制动作会有差异
if (mrks[i].showText) {
if (mrks[i].markType == MarkType.mrkNormal)
DrawMark(k, (i + 1), g, chnls, mrks[i], ava, cpa, mrkFont);
else if (mrks[i].markType == MarkType.mrkPeak)
DrawPeak(k, (i + 1), g, chnls, mrks[i], ava, cpa, mrkFont);
else
continue;
//else if (mrks[i].markType == MarkType.mrkValley)
// ;
//递增可见MARK点的个数
k++;
} else
continue;
}
}
//在mrk.sequence[]中指定的那些channel中，搜索MARK点
//把找到的点，合并成一个文本，作为该MARK点文本
//绘制MARK点文本和MARK图形
private static void DrawMark( int mrkCount,
int mrkOrder,
Graphics g,
Channels chnls,
ChannelMark mrk,
AixsVisibleArea ava,
ChannelPictureArea cpa,
Font mrkFont)
{
int i, j;
SizeF szf;
Channel chnl;
string label = "";
bool bExists = false;
PointF srcPoint = new PointF(float.MinValue, float.MinValue);
//用于绘制MARK线时，定位坐标
PointF gphPoint = srcPoint;
//计算MARK点的世界坐标，即mrk.value，由外部传入
MarkInfo[] mi = new MarkInfo[mrk.sequence.Length];
//在指定的channel中构造MARK文本
for (i = 0; i < mrk.sequence.Length; i++)
{
mi[i].iChannel = -1;
mi[i].iOrder = mrkOrder;
j = mrk.sequence[i];
chnl = chnls.ChannelOf(j);
if (chnl == null)
continue;
srcPoint = Search2(chnl, ava, cpa, mrk.searchType, mrk.value);
if (srcPoint.X > float.MinValue)
{
if (!bExists) {
bExists = true;
gphPoint = srcPoint;
}
}
mi[i].fPoint = srcPoint;
mi[i].iChannel = (j + 1);
}
//若找到MARK点
if ((mrk.showMarkShape) && (gphPoint.X > float.MinValue))
{
//使用找的MARK，绘制其文本
if (GenMarkText != null)
{
label = GenMarkText(mi);
szf = g.MeasureString(label, mrkFont);
g.DrawString(label,
mrkFont,
new LinearGradientBrush(new RectangleF(0, 0, szf.Width, szf.Height), mrk.markColor, mrk.markColor, 0.0),
new Point(cpa.rec.X, (int)(cpa.rec.Y + mrkCount * szf.Height + MARKMARGIN)));
}
//使用找的MARK，构造形状
Point[] p;
RectangleF recf;
//使用找到点的X坐标值来计算MARK点页面坐标在X轴方向的值，不使用mrk.value
float x = (int)(cpa.rec.X +
(gphPoint.X - ava.xBegin) * cpa.rec.Width / (ava.xEnd - ava.xBegin));
if (mrk.markShape == MarkShape.markPloygon) {
p = new Point[7];
recf = MakeMarkPolygon(p, (int)x, cpa);
} else {
p = new Point[3];
int y = (int)(cpa.rec.Y + cpa.rec.Height -
(gphPoint.Y - ava.yBegin) * cpa.rec.Height / (ava.yEnd - ava.yBegin));
recf = MakeMarkTriangle(p, new Point((int)x, y), cpa);
}
//绘制MARK形状
g.DrawPolygon(new Pen(mrk.markColor), p);
//绘制MARK形状内的文本
szf = g.MeasureString(mrkOrder.ToString(), mrkFont);
g.DrawString(mrkOrder.ToString(),
mrkFont,
new LinearGradientBrush(recf, mrk.markColor, mrk.markColor, 0.0),
new PointF(recf.X + (recf.Width - szf.Width) / 2, recf.Y + (recf.Height - szf.Height) / 2)
);
}
}
/// <summary>
/// 在指定的Channel中，查找Y值最小的点
/// </summary>
/// <param name="chnls"></param>
/// <param name="chnlIndex"></param>
/// <returns></returns>
internal static PointF Min_Y(Channels chnls, int chnlIndex)
{
PointF p = new PointF(0.0f, 0.0f);
Channel chnl = chnls.ChannelOf(chnlIndex);
if (chnl != null)
p = SearchValley(chnl);
return p;
}
//在mrk.sequence[]中指定的那些channel中，搜索Y值最大的点
//绘制PEAK点文本和PEAK图形
private static void DrawPeak( int mrkCount,
int mrkOrder,
Graphics g,
Channels chnls,
ChannelMark mrk,
AixsVisibleArea ava,
ChannelPictureArea cpa,
Font mrkFont)
{
SizeF szf;
Channel chnl;
string label = "";
PointF p2 = new PointF(float.MinValue, float.MinValue);
PointF srcPoint = p2;
//在mrk.sequence指定的channel搜索PEAK点
int k = -1;
for (int i = 0; i < mrk.sequence.Length; i++)
{
chnl = chnls.ChannelOf(mrk.sequence[i]);
if (chnl != null) {
p2 = SearchPeak(chnl);
if (p2.Y > srcPoint.Y) {
k = i;
srcPoint = p2;
}
}
}
//找到PEAK点
if ((mrk.showMarkShape) && (srcPoint.X > float.MinValue))
{
//对srcPoint的X坐标执行世界变换
int x = (int)(cpa.rec.X + (srcPoint.X - ava.xBegin) * cpa.rec.Width / (ava.xEnd - ava.xBegin));
MarkInfo[] mi = new MarkInfo[1];
mi[0].fPoint = srcPoint;
mi[0].iChannel = (k + 1);
mi[0].iOrder = mrkOrder;
//构造并绘制PEAK文本
if (GenPeakText != null) {
label = GenPeakText(mi);
szf = g.MeasureString(label, mrkFont);
g.DrawString(label,
mrkFont,
new LinearGradientBrush(new RectangleF(0, 0, szf.Width, szf.Height), mrk.markColor, mrk.markColor, 0.0),
new Point(cpa.rec.X, (int)(cpa.rec.Y + mrkCount * szf.Height + MARKMARGIN)));
}
Point[] p;
RectangleF recf;
p = new Point[7];
recf = MakeMarkPolygon(p, x, cpa);
//绘制PEAK形状
g.DrawPolygon(new Pen(mrk.markColor), p);
//绘制PEAK形状内的文本
szf = g.MeasureString(mrkOrder.ToString(), mrkFont);
g.DrawString(mrkOrder.ToString(),
mrkFont,
new LinearGradientBrush(recf, mrk.markColor, mrk.markColor, 0.0),
new PointF(recf.X + (recf.Width - szf.Width) / 2, recf.Y + (recf.Height - szf.Height) / 2)
);
}
}
//语句依据次序执行，建立控件
internal PlotEx(XY2dPlotEx plot)
{
//保存控件的winform对象
this.plot = plot;
//默认，启用采样，仅绘制坐标轴可见范围内的数据
Sampling = true;
//设置控件内边距，默认10像素
innerMargin = 10;
GridBackColor = Color.SkyBlue;
AixsLineColor = Color.Black;
//构造控件的标题对象
tt = new plotTitle();
//构造控件的X轴对象
xa = new XAixs();
//构造控件的Y轴对象
ya = new YAixs();
//构造控件的当前可见区域对象
aixvblArea = new AixsVisibleArea(xa.start, xa.stop, ya.start, ya.stop);
//构造控件的绘图区域对象
chnlPicArea = new ChannelPictureArea();
//构造控件的边框控制对象
pltBorder = new PlotBorder();
//使用上述部件，绘制控件
RedrawInNewBitmap();
//构造数据对象，用于绘制曲线
chnls = new Channels();
//构造支持的MARK对象
marks = new ChannelMark[MARKCAPCITY];
for (int i = 0; i < marks.Length; i++)
marks[i] = new ChannelMark(chnls.Length);
}