GDI绘制实时频谱图形.rar

【实例简介】
GDI+绘制实时频谱图形 高效！！ 支持多频段频谱，图形缩放，选择频点，标注信息等等功能！ if(m_nReadLines 10) { nPenWidth *= (REAL)(fSpace/10 + 0.5); } double fOffsetBegin = m_borderRect.left + 1 + fSpace; int x ,y; double fScale = (double)(nDrawLines / m_nClientWidth); //频率点跳越间隔 if(fScale < 1.0) fScale = 1.0; double fVerScale = (double)m_nClientHeight/MAX_RANGE; Font myFont(L"宋体", 8); StringFormat format; format.SetAlignment(StringAlignmentNear); CStringW strLocalInfo; BOOL blocalMove = FALSE; PointF localPoint; ELevel* pKeepLineData = NULL; if(m_eLineType == FL_MIN_LINE) pKeepLineData = &m_eMinLevelData; else if(m_eLineType == FL_MAX_LINE) pKeepLineData = &m_eMaxLevelData; else if(m_eLineType == FL_AVG_LINE) pKeepLineData = &m_eAvgLevelData; for(double fLine = 0;(int)fLine m_nMaxLines) break; y = m_eLevelData[fLine + m_nFreqFrom]; if(y) { x = (int)(fLine * fSpace + fOffsetBegin); y *= fVerScale; g->DrawLine(&Pen(Color::DarkGreen,(REAL)nPenWidth),PointF((REAL)x,(REAL)m_borderRect.bottom),PointF((REAL)x,(REAL)(m_borderRect.bottom-y))); } if(pKeepLineData) { y = pKeepLineData->at(fLine + m_nFreqFrom); y *= fVerScale; y = m_borderRect.bottom-y; if(!blocalMove) { localPoint = PointF(x,y); blocalMove = TRUE ; } else { g->DrawLine(&Pen(Color::Red),localPoint,PointF(x,y)); localPoint = PointF(x,y); } } }
【实例截图】
【核心代码】
4744302543336681823.rar
└── Histograms
├── Histogram
│   ├── GdiDraw.cpp
│   ├── GdiDraw.h
│   ├── Histogram.aps
│   ├── Histogram.cpp
│   ├── HistogramDoc.cpp
│   ├── HistogramDoc.h
│   ├── Histogram.h
│   ├── Histogram.rc
│   ├── Histogram.vcproj
│   ├── HistogramView.cpp
│   ├── HistogramView.h
│   ├── MainFrm.cpp
│   ├── MainFrm.h
│   ├── ReadMe.txt
│   ├── res
│   │   ├── HistogramDoc.ico
│   │   ├── Histogram.ico
│   │   ├── Histogram.rc2
│   │   └── Toolbar.bmp
│   ├── resource.h
│   ├── stdafx.cpp
│   ├── stdafx.h
│   └── targetver.h
├── Histogram.sln
└── Histogram.suo

3 directories, 24 files