www.gusucode.com > 虚拟仪表-风向表盘C++源码程序 > 虚拟仪表-风向表盘/wind/wind/WindPicture.cpp
/***********************************************************************
* Copyright (c) 2010* All rights reserved.*
* ATTRIBUTE: 一个仪表控件类，用来仿真工业控制现场仪表数据显示等
* FILE NAME: WindPicture.cpp
* ABSTRACT: 可用于工业控制仿真仪表数据显示等
* CURRENT VERSION: V1.0
* AUTHOR: 李保成
* CONTECT: chengbaolee@gmail.com
* BUILD DATA: 26/11/2010
* COMPLETION DATE: 26/11/2010
* PRE-COMPLETION DATE:
* NOTE: 如果您要作为商业用途，请联系作者
***********************************************************************/
#include "stdafx.h"
#include "WindPicture.h"
#include <math.h>
#include "MemDC.h"
#include "Resource.h"
CWindPicture::CWindPicture()
{
m_angle=0.0;
m_Point[0].x=0;
m_Point[0].y=0;
m_Point[1].x=0;
m_Point[1].y=0;
m_Point[2].x=0;
m_Point[2].y=0;
m_Point[3].x=0;
m_Point[3].y=0;
m_NeedleColor = RGB( 255, 0, 0);
memset(m_strUnits, 0, sizeof(m_strUnits));
::strcpy(m_strUnits,"风向");
m_angle=0;
}
CWindPicture::~CWindPicture()
{
m_bitmapBackground.DeleteObject();
}
BEGIN_MESSAGE_MAP(CWindPicture, CStatic)
ON_WM_PAINT()
ON_WM_ERASEBKGND()
END_MESSAGE_MAP()
void CWindPicture::OnPaint()
{
CPaintDC dc(this); // device context for painting
GetClientRect(&m_rectCtrl);
CMemDC memDC(&dc, &m_rectCtrl);
// 选取圆盘边框半径
//m_nRadiusFrame = max(m_rectCtrl.Height(), m_rectCtrl.Width())*9/21;
m_nRadiusFrame=min(m_rectCtrl.Height(),m_rectCtrl.Width());
// 获得仪表盘中心点
m_ptMeterCenter = m_rectCtrl.CenterPoint();
if(m_dcground.GetSafeHdc()== NULL|| (m_bitmapBackground.m_hObject == NULL))
{
m_dcground.CreateCompatibleDC(&dc);
m_bitmapBackground.CreateCompatibleBitmap(&dc, m_rectCtrl.Width(),m_rectCtrl.Height());
m_pBitmapOldBackground = m_dcground.SelectObject(&m_bitmapBackground);
DrawMeterBackground(&m_dcground, m_rectCtrl);
}
memDC.BitBlt(0, 0, m_rectCtrl.Width(), m_rectCtrl.Height(),
&m_dcground, 0, 0, SRCCOPY) ;
DrawValue(&memDC);
DrawNeedle(&memDC, m_rectCtrl);
// 不为绘图消息调用 CStatic::OnPaint()
}
void CWindPicture::DrawMeterBackground(CDC *pDC, CRect &rect)
{
int nFrame=m_nRadiusFrame/10;
CPen PenOut, pPenInner, *pOldPen;
CBrush m_brushBack, pBackBrush, *pOldBrush;
m_BackColor=GetSysColor(COLOR_WINDOW);
m_brushBack.CreateSolidBrush(m_BackColor);
pOldBrush = (CBrush *)pDC->SelectObject(&m_brushBack);
pDC->FillRect(rect, &m_brushBack); //绘制背景
//pDC->Rectangle(rect); //绘制一个边框
pDC->SelectObject(pOldBrush);
m_brushBack.DeleteObject();
m_brushBack.CreateSolidBrush(RGB(255, 255, 255));//圆盘色
pOldBrush = (CBrush *)pDC->SelectObject(&m_brushBack);
PenOut.CreatePen(PS_SOLID, 10, RGB( 0, 0, 255));//外圆色
pOldPen = (CPen *)pDC->SelectObject(&PenOut);
CRect rectRound(m_ptMeterCenter.x - m_nRadiusFrame / 2+nFrame,
m_ptMeterCenter.y - m_nRadiusFrame / 2+nFrame,
m_ptMeterCenter.x + m_nRadiusFrame / 2-nFrame,
m_ptMeterCenter.y + m_nRadiusFrame / 2-nFrame);
pDC->Ellipse(rectRound);
pDC->SelectObject(pOldPen);
PenOut.DeleteObject();//外圆
pPenInner.CreatePen(PS_DOT, 1, RGB( 0, 0, 255));//内圆
pOldPen = (CPen *)pDC->SelectObject(&pPenInner);
CRect rectInside(m_ptMeterCenter.x - m_nRadiusFrame / 2+2*nFrame,
m_ptMeterCenter.y - m_nRadiusFrame / 2+2*nFrame,
m_ptMeterCenter.x + m_nRadiusFrame / 2-2*nFrame,
m_ptMeterCenter.y + m_nRadiusFrame / 2-2*nFrame);
pDC->Ellipse(rectInside);
pDC->SelectObject(pOldPen);
PenOut.DeleteObject();
//画方向标志符
pDC->SetTextAlign(TA_BOTTOM|TA_LEFT);//north
pDC->TextOut(m_ptMeterCenter.x-2, m_ptMeterCenter.y-m_nRadiusFrame/2.3, "N");
pDC->SetTextAlign(TA_BOTTOM|TA_LEFT);//south
pDC->TextOut(m_ptMeterCenter.x, m_ptMeterCenter.y+m_nRadiusFrame/2.0, "S");
pDC->SetTextAlign(TA_BOTTOM|TA_RIGHT);//east
pDC->TextOut(m_ptMeterCenter.x+m_nRadiusFrame/2.0, m_ptMeterCenter.y, "E");
pDC->SetTextAlign(TA_BOTTOM|TA_LEFT);//west
pDC->TextOut(m_ptMeterCenter.x-m_nRadiusFrame/2.0, m_ptMeterCenter.y, "W");
}
void CWindPicture::DrawValue(CDC *pDC)
{
int nHeight;
CPoint pttemp;
CString strtemp;
CFont *pFontOld;
// 数值显示
nHeight = m_nRadiusFrame/8;
m_rectValue.SetRect(m_ptMeterCenter.x-nHeight,m_ptMeterCenter.y+nHeight,m_ptMeterCenter.x+nHeight,m_ptMeterCenter.y-nHeight);
pttemp = m_rectValue.CenterPoint();
strtemp.Format("%.*lf",2, m_angle); //2表示两位小数
m_font.DeleteObject() ;
m_font.CreateFont (nHeight, 0, 0, 0, 400,
FALSE, FALSE, 0, ANSI_CHARSET,
OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS,
DEFAULT_QUALITY,
DEFAULT_PITCH|FF_SWISS, "楷体") ;
pFontOld = pDC->SelectObject(&m_font);
pDC->SetBkColor(RGB(255,255,255));//GetSysColor(COLOR_BTNFACE)
pDC->SetTextAlign(TA_TOP|TA_CENTER);
pDC->TextOut(pttemp.x, pttemp.y, m_strUnits);
pDC->TextOut(pttemp.x, pttemp.y+nHeight, strtemp);
// 恢复字体和背景色
pDC->SelectObject(pFontOld);
}
void CWindPicture::DrawNeedle(CDC *pDC, CRect &rect)
{
/*m_rgn.DeleteObject ();
m_rgn.CreatePolygonRgn(m_Point,4,ALTERNATE);*/
CBrush pNeedleBrush, *pOldBrush;
CPen penDraw,*pPenOld ;
pNeedleBrush.CreateSolidBrush(m_NeedleColor);
pOldBrush = (CBrush *)pDC->SelectObject(&pNeedleBrush);
CPoint ptRgn[4];
double radius=m_nRadiusFrame/2.0-m_nRadiusFrame/9.0;//外圆半径
ptRgn[0].x=m_ptMeterCenter.x-(int)(sin((m_angle+15)/180*3.1415927)*(radius-m_nRadiusFrame/7));
ptRgn[0].y=m_ptMeterCenter.y-(int)(cos((m_angle+15)/180*3.1415927)*(radius-m_nRadiusFrame/7));
ptRgn[1].x=m_ptMeterCenter.x-(int)(sin(m_angle/180*3.1415927)*radius);
ptRgn[1].y=m_ptMeterCenter.y-(int)(cos(m_angle/180*3.1415927)*radius);
ptRgn[2].x=m_ptMeterCenter.x-(int)(sin((m_angle-15)/180*3.1415927)*(radius-m_nRadiusFrame/7));
ptRgn[2].y=m_ptMeterCenter.y-(int)(cos((m_angle-15)/180*3.1415927)*(radius-m_nRadiusFrame/7));
ptRgn[3].x=m_ptMeterCenter.x-(int)(sin(m_angle/180*3.1415927)*(radius-m_nRadiusFrame/13));
ptRgn[3].y=m_ptMeterCenter.y-(int)(cos(m_angle/180*3.1415927)*(radius-m_nRadiusFrame/13));
pDC->SetPolyFillMode(/*WINDING*/ALTERNATE);
pDC->Polygon(ptRgn, 4);
pDC->SelectObject(pOldBrush);
pNeedleBrush.DeleteObject();
//CString strtemp;
//double radius=m_nRadiusFrame/2.0-m_nRadiusFrame/9.0;
//for (int i=0;i<8;i++)
//{
// strtemp.Format("%.*lf", 2,i*45);
// pDC->SetTextAlign(TA_BOTTOM|TA_LEFT);
// pDC->TextOut(m_ptMeterCenter.x-radius*sin((i*45)* PI / 180), m_ptMeterCenter.y+radius*cos((i*45)* PI / 180),strtemp);
//}
}
void CWindPicture::setAngle(double angle)
{
m_angle=angle;
ReconstructControl();
}
void CWindPicture::ReconstructControl()
{
if ((m_pBitmapOldBackground) &&
(m_bitmapBackground.GetSafeHandle()) &&
(m_dcground.GetSafeHdc()))
{
m_dcground.SelectObject(m_pBitmapOldBackground);
m_dcground.DeleteDC() ;
m_bitmapBackground.DeleteObject();
}
Invalidate ();
}
BOOL CWindPicture::OnEraseBkgnd(CDC* pDC)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
return CStatic::OnEraseBkgnd(pDC);
}