www.pudn.com > wendu.rar > Test.cpp
// Test.cpp : implementation file
//
#include "stdafx.h"
#include "wendu.h"
#include "Test.h"
#include "MemDC.h"
#include "math.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CTest
CTest::CTest()
{
Scale=10; //刻度数
Subscale=5; //子刻度数
CurveMax=160; //最大刻度读数
CurveMin=-20; //最小刻度读数
TempValue=0; //当前温度值
clrText=RGB(0, 255, 0); //字体颜色
clrBar=RGB(0, 0, 255); //填充区域颜色
//设置控件上显示的文字的字体和大小
m_SmallFont.CreateFont(-12, 0, 0, 0, FW_THIN, false, false, false, DEFAULT_CHARSET,
OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY,
VARIABLE_PITCH, _TEXT("Times New Roman"));
// 关键代码
// 初始化关键代码的 C_S 结构
InitializeCriticalSection(&g_csData);
}
CTest::~CTest()
{
}
BEGIN_MESSAGE_MAP(CTest, CStatic)
//{{AFX_MSG_MAP(CTest)
ON_WM_PAINT()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CTest message handlers
void CTest::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: Add your message handler code here
//获得控件区域
GetClientRect(&temprect);
// 创建内存 DC
CMemDC *pMemDC=new CMemDC(&dc,&temprect);
CPoint orgBrushOrigin=pMemDC->GetBrushOrg();
if(m_dcBackground.GetSafeHdc()==NULL||m_pBitmapBackground.m_hObject==NULL)
{
m_dcBackground.CreateCompatibleDC(&dc);
m_pBitmapBackground.CreateCompatibleBitmap(&dc,temprect.Width(),temprect.Height());
m_pBitmapOldBackground=m_dcBackground.SelectObject(&m_pBitmapBackground);
//绘制背景
DrawBackground(&m_dcBackground);
}
pMemDC->BitBlt(0,0,temprect.Width(),temprect.Height(),&m_dcBackground,0,0,SRCCOPY);
//画温度计框架
DrawFrame(pMemDC);
//填充温度计内部
FillFrame(pMemDC);
//显示标题
ShowTitle(pMemDC);
//显示温度
ShowValue(pMemDC);
pMemDC->SetBrushOrg(orgBrushOrigin.x,orgBrushOrigin.y);
delete pMemDC;
// Do not call CStatic::OnPaint() for painting messages
}
void CTest::DrawBackground(CDC *pDC)
{
//填充背景
pDC->FillSolidRect(&temprect,RGB(0,0,0));
}
void CTest::DrawFrame(CDC *pDC)
{
//用关键代码同步
EnterCriticalSection(&g_csData);
//定义画笔
CPen pen(PS_SOLID,1,RGB(0,255,0));
pDC->SelectObject(&pen);
//定义字体
CFont * pOldFont ;
pOldFont=pDC->SelectObject(&m_SmallFont);
//给各坐标点赋值
Point1_X=temprect.Width()*3/7;
Point1_Y=temprect.Height()/10;
Point2_X=temprect.Width()*4/7;
Point2_Y=Point1_Y;
RadiusStartPoint_X=Point1_X;
RadiusStartPoint_Y=temprect.Height()*8/10;
RadiusEndPoint_X=Point2_X;
RadiusEndPoint_Y=RadiusStartPoint_Y;
R=temprect.Width()/7;
RadiusCenterPoint_X=temprect.Width()/2;
RadiusCenterPoint_Y=RadiusStartPoint_Y+R*sqrt(3.0)/2;
CurveStartPoint_X=Point2_X;
CurveStartPoint_Y=RadiusEndPoint_Y-temprect.Width()/14;
CurveEndPoint_X=CurveStartPoint_X;
CurveEndPoint_Y=temprect.Height()/9;
CurveLength=CurveStartPoint_Y-CurveEndPoint_Y;
ValueBound=CurveMax-CurveMin;
//定义存放刻度值的数组
TCHAR ScaleValue[MAX_PATH*sizeof(TCHAR)+1];
ZeroMemory(&ScaleValue, sizeof(ScaleValue));
//设置背景为透明模式和字体颜色
pDC->SetBkMode(TRANSPARENT);
pDC->SetTextColor(clrText);
//绘制温度计图形
pDC->MoveTo(Point1_X,Point1_Y);
pDC->LineTo(RadiusStartPoint_X,RadiusStartPoint_Y);
pDC->MoveTo(Point2_X,Point2_Y);
pDC->LineTo(RadiusEndPoint_X,RadiusEndPoint_Y);
pDC->MoveTo(Point1_X,Point1_Y);
pDC->LineTo(Point2_X,Point2_Y);
pDC->MoveTo(RadiusStartPoint_X,RadiusStartPoint_Y);
pDC->AngleArc(RadiusCenterPoint_X,RadiusCenterPoint_Y,R,120,300);
//绘制刻度
for(int i=0; i<=(Scale-1)*Subscale ; i++)
{
if(i%Subscale==0)
{
pDC->MoveTo(CurveStartPoint_X,CurveStartPoint_Y-i*CurveLength/((Scale-1)*Subscale));
pDC->LineTo(CurveStartPoint_X+temprect.Width()/20,CurveStartPoint_Y-i*CurveLength/((Scale-1)*Subscale));
//显示刻度值
_stprintf(ScaleValue, _TEXT ("%3.0f"), CurveMin+ValueBound*i/((Scale-1)*Subscale));
pDC->TextOut(CurveStartPoint_X+temprect.Width()/15,CurveStartPoint_Y-(i+1)*CurveLength/((Scale-1)*Subscale), ScaleValue);
}
if(i%Subscale!=0)
{
pDC->MoveTo(CurveStartPoint_X,CurveStartPoint_Y-i*CurveLength/((Scale-1)*Subscale));
pDC->LineTo(CurveStartPoint_X+temprect.Width()/30,CurveStartPoint_Y-i*CurveLength/((Scale-1)*Subscale));
}
}
// 离开关键代码
LeaveCriticalSection(&g_csData);
}
void CTest::FillFrame(CDC *pDC)
{
// 用关键代码同步
EnterCriticalSection(&g_csData);
//填充图形
CPen pen(PS_SOLID,1,clrBar);
pDC->SelectObject(&pen);
//定义画刷
CBrush BarBush;
CBrush *pBarBush;
BarBush.CreateSolidBrush(clrBar);//实体画刷
pBarBush=pDC->SelectObject(&BarBush);
//确定填充区域
FillHeight=CurveStartPoint_Y-(TempValue-CurveMin)*CurveLength/ValueBound;
pDC->Rectangle(Point1_X+1,FillHeight,RadiusEndPoint_X-1,RadiusEndPoint_Y);
pDC->Ellipse(RadiusCenterPoint_X-R+1,RadiusCenterPoint_Y-R+1,RadiusCenterPoint_X+R-1,RadiusCenterPoint_Y+R-1);
BarBush.DeleteObject();
pDC->SelectObject(pBarBush);
// 离开关键代码
LeaveCriticalSection(&g_csData);
}
void CTest::GetData(double TValue)
{
// 用关键代码同步
EnterCriticalSection(&g_csData);
TempValue=TValue;
//使原值无效，重新赋值
Invalidate();
// 离开关键代码
LeaveCriticalSection(&g_csData);
}
void CTest::ShowTitle(CDC *pDC)
{
//定义画笔
CPen pen(PS_SOLID,1,RGB(0,255,0));
pDC->SelectObject(&pen);
//绘制标题
TCHAR Titles[MAX_PATH*sizeof(TCHAR)+1]; // 控件标题
ZeroMemory(&Titles, sizeof(Titles));
_stprintf(Titles, _TEXT ("%s"), "温度(°C):");
pDC->TextOut(temprect.Width()*2/7,temprect.top, Titles);
}
void CTest::ShowValue(CDC *pDC)
{
//定义画笔
CPen pen(PS_SOLID,1,RGB(0,255,0));
pDC->SelectObject(&pen);
//显示温度值
TCHAR value[MAX_PATH*sizeof(TCHAR)+1];
ZeroMemory(&value, sizeof(value));
_stprintf(value, _TEXT ("%3.2f"), TempValue);
pDC->TextOut(temprect.Width()*4/7,temprect.top, value);
}