C++图表绘制代码，有助于学习掌握基本的C++数字图像处理技术。值得学习和参考。....rar

// Graph.cpp : implementation file // #include "stdafx.h" //#include "testdraw.h" #include "GraphSeries.h" #include "GraphLegend.h" #include "math.h" #include "Graph.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CGraph CGraph::CGraph() { graphSeries = new CObList(); tickRange = 100; seriesSize = 0; graphHasLegend = FALSE; legendWidth = 0; graphType = 0; dataColor[0] = RGB(0,255,0); //green dataColor[1] = RGB(0,0,255); //blue dataColor[2] = RGB(255,0,0); //red dataColor[3] = RGB(255,255,0); //yellow dataColor[4] = RGB(255,153,51); //orange dataColor[5] = RGB(255,51,153); //hot pink dataColor[6] = RGB(153,0,204); //purple dataColor[7] = RGB(0,255,255); //cyan dataColor[8] = RGB(0,0,0); //black dataColor[9] = RGB(255,255,255); //white xAxisAlign = 0; //horizontal xAxisLabelLength = 0; } CGraph::CGraph(int type) { graphSeries = new CObList(); tickRange = 100; seriesSize = 0; graphHasLegend = FALSE; legendWidth = 0; graphType = type; dataColor[0] = RGB(0,255,0); //green dataColor[1] = RGB(0,0,255); //blue dataColor[2] = RGB(255,0,0); //red dataColor[3] = RGB(255,255,0); //yellow dataColor[4] = RGB(255,153,51); //orange dataColor[5] = RGB(255,51,153); //hot pink dataColor[6] = RGB(153,0,204); //purple dataColor[7] = RGB(0,255,255); //cyan dataColor[8] = RGB(0,0,0); //black dataColor[9] = RGB(255,255,255); //white xAxisAlign = 0; //horizontal xAxisLabelLength = 0; } CGraph::~CGraph() { } BEGIN_MESSAGE_MAP(CGraph, CStatic) //{{AFX_MSG_MAP(CGraph) // NOTE - the ClassWizard will add and remove mapping macros here. //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CGraph message handlers void CGraph::SetTickSpace(int yDist) { tickSpace = yDist; } void CGraph::SetTickRange(int maxTick) { tickRange = maxTick; } void CGraph::SetGraphType(int gType) { graphType = gType; } void CGraph::SetXAxisAlignment(int alignValue) { xAxisAlign = alignValue; } int CGraph::GetXAxisAlignment() { return xAxisAlign; } void CGraph::DrawGraph(CDC* pDC) { CString tickLabel; CWnd* graphWnd = pDC->GetWindow(); CRect graphRect; graphWnd->GetClientRect(&graphRect); maxHeight = graphRect.Height() - 20; //for frame window and status bar maxWidth = graphRect.Width() - 5; //for frame window //We will leave 5 pixels blank on all sides of the graph. So //top-left side of graph is at 5,5 and the bottom-right side of //graph is at ((maxHeight - 5), (maxWidth - 5)) //these settings are altered by axis labels and legends. //draw graph title CFont titleFont; titleFont.CreateFont(28, 0, 0, 0, 700, FALSE, FALSE, 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_ROMAN,"Arial"); CFont* pOldFont = (CFont*) pDC->SelectObject(&titleFont); pDC->TextOut((maxWidth / 2) - ((graphTitle.GetLength() * 16) / 2), 10, graphTitle); pDC->SelectObject(pOldFont); if(graphType == 2) //pie { //since pie has not axis lines, set to full size minus 5 on each side //these are needed for legend to plot itself xAxisWidth = maxWidth - 10; yAxisHeight = maxHeight - 20; //10 buffer and 20 for title xApexPoint = 5; yApexPoint = maxHeight - 5; } else { //X-axis will be raised by 20 pixels for tick-labels //Y-axis will be shifted by (max(tick-label size) * 10) + label * 10 tickLabel.Format("%d", tickRange); //determine axis specifications //tick label offset is 4 (for the tick) + 6 (total 10) from axis line xApexPoint = 5 + (tickLabel.GetLength() * 8) + 10 + 30/*(axisYLabel.GetLength() * 8)*/ + 5; //allowing 8 pixels per char in tick label //y apex based on 5 + 15 (x label) + 4 (for the tick) + 4 (text below tick) + 12 (tick label) + 10 if(!xAxisAlign) //horizontal yApexPoint = (maxHeight - 5) - 45; //apex points are the cross section of axis lines else yApexPoint = (maxHeight - 5) - (xAxisLabelLength * 12) - 10; yAxisHeight = yApexPoint - 40; xAxisWidth = (maxWidth - 5) - xApexPoint; } //draw legend if(graphHasLegend) DrawLegend(pDC); if(graphType != 2) //pie { //draw axis lines DrawAxis(pDC); } //draw series data and labels DrawSeries(pDC); } void CGraph::DrawAxis(CDC* pDC) { pDC->SetTextColor(RGB(0,0,0)); //draw y axis pDC->MoveTo(xApexPoint, yApexPoint); pDC->LineTo(xApexPoint, yApexPoint - yAxisHeight); //draw x axis pDC->MoveTo(xApexPoint, yApexPoint); if(graphHasLegend) pDC->LineTo(xApexPoint + (xAxisWidth - legendWidth - 10), yApexPoint); else pDC->LineTo(xApexPoint + xAxisWidth, yApexPoint); //draw labels CFont sideFont; sideFont.CreateFont(16, 0, 900, 0, 700, FALSE, FALSE, 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_ROMAN,"Arial"); CFont* pOldFont = (CFont*) pDC->SelectObject(&sideFont); pDC->TextOut(10, (maxHeight / 2) - 6, axisYLabel); pDC->SelectObject(pOldFont); pDC->TextOut(xApexPoint + (xAxisWidth / 2) - (axisXLabel.GetLength() * 19), maxHeight - 5 - 6, axisXLabel); //to allow scalability (height may be less than tickRange) double tickScale = 0.00; if(tickRange > yAxisHeight) tickScale = ((yAxisHeight * 1.00) / (tickRange * 1.00)) * tickSpace; else tickScale = tickSpace; //draw y axis ticks for(int y = 1; y <= tickRange / tickSpace; y++) //no tick at 0 { int tickYLocation = yApexPoint - (y * tickScale); pDC->MoveTo(xApexPoint - 4, tickYLocation); pDC->LineTo(xApexPoint + 4, tickYLocation); //draw tick label CString tickLabel; tickLabel.Format("%d", y * tickSpace); pDC->TextOut(xApexPoint - 10 - (tickLabel.GetLength() * 8), tickYLocation - 6, tickLabel); } //draw X axis tick marks POSITION pos; pos = graphSeries->GetHeadPosition(); CGraphSeries* tmpSeries; for(int x = 1; x <= graphSeries->GetCount(); x++) { tmpSeries = (CGraphSeries*)graphSeries->GetNext(pos); int seriesSpace; int tickXLocation; if(graphHasLegend) seriesSpace= (xAxisWidth - legendWidth - 10) / graphSeries->GetCount(); else seriesSpace= xAxisWidth / graphSeries->GetCount(); tickXLocation = xApexPoint + ((x * seriesSpace) - (seriesSpace / 2)); pDC->MoveTo(tickXLocation,yApexPoint - 4); pDC->LineTo(tickXLocation,yApexPoint + 4); //draw tick label CString tickLabel; tickLabel = tmpSeries->GetLabel(); if(!xAxisAlign) //horizontal pDC->TextOut(tickXLocation - ((tickLabel.GetLength() * 8) / 2), yApexPoint + 8, tickLabel); else { CFont sideFont2; sideFont2.CreateFont(16, 0, (xAxisAlign * 10), 0, 700, FALSE, FALSE, 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_ROMAN,"Arial"); pOldFont = (CFont*) pDC->SelectObject(&sideFont2); if(xAxisAlign < 180) pDC->TextOut(tickXLocation - 8, yApexPoint + 8 + (xAxisLabelLength * 8), tickLabel); else pDC->TextOut(tickXLocation + 8, yApexPoint + 8, tickLabel); pDC->SelectObject(pOldFont); } } } void CGraph::AddSeries(CGraphSeries* dataSet) { int numData = 0; for(int i = 0; i < 10; i++) { if(dataSet->GetData(i) > 0) numData++; if(dataSet->GetLabel().GetLength() > xAxisLabelLength) xAxisLabelLength = dataSet->GetLabel().GetLength(); } if(numData > seriesSize) seriesSize = numData; graphSeries->AddTail(dataSet); } void CGraph::SetXAxisLabel(CString label) { axisXLabel = label; } void CGraph::SetYAxisLabel(CString label) { axisYLabel = label; } void CGraph::SetColor(int group, COLORREF groupColor) { dataColor[group] = groupColor; } CO