CText类使用例程

//========================================================================
//TITLE:
// CText类使用例程
//AUTHOR:
// norains
//DATE:
// Tuesday 17-April-2007
//Environment:
// EVC4.0 + Standard SDK 4.2
// EVC4.0 + Standard SDK 5.0
//========================================================================

CText是为了方便在屏幕中输出文本而封装的类.该类将复杂的设置操作封装成简单的函数,便于代码书写的简便性.

该类使用简单,示例如下:

//设置显示范围

txtInfo.SetPosition(&rcWnd);

//设置字体颜色

txtInfo.SetTextColor(RGB(255,0,0));

//设置字体磅值,0为默认的字体大小

txtInfo.SetTextHeight(0);

//设置显示的文本

txtInfo.SetText(TEXT("测试"));

//设置格式,该参数和DrawText()相同

txtInfo.SetFormat(DT_RIGHT);

//绘制文本

txtInfo.Draw(hdc);

默认的是透明显示,如果需要显示背景颜色,可以如下操作:

//设置背景色

txtInfo.SetBkColor(RGB(0,0,233));

//OPAQUE为绘制背景色

txtInfo.SetBkMode(OPAQUE);

然后再调用Draw进行绘制即可.

/**////////////////////////////////////////////////////////////////////////
//Text.h:interfacefortheCTextclass.
//
//Version:
//1.0
//Data:
//2007.03.27
/**///////////////////////////////////////////////////////////////////////

#ifndefTEXT_H
#defineTEXT_H


//------------------------------------------------------------------
classCText
...{
public:
voidGetPosition(RECT*prcOut);
voidSetTextHeight(intiHeight);
voidSetFormat(UINTuFormat);
voidSetBkColor(COLORREFcrColor);
voidSetTextColor(COLORREFcrColor);
BOOLSetBkMode(intiMode);
voidDraw(HDChdc);
BOOLSetText(constTCHAR*pszText);
voidSetPosition(constRECT*prc);
CText();
virtual~CText();
protected:
RECTm_rcWndPos;
TCHAR*m_pszText;
ULONGm_ulSizeText;
UINTm_uFormat;
intm_iTextHeight;
intm_iBkMode;
COLORREFm_crTextColor;
COLORREFm_crBkColor;

};

#endif//#ifndefTEXT_H

/**///////////////////////////////////////////////////////////////////////
//Text.cpp:implementationoftheCTextclass.
//
/**///////////////////////////////////////////////////////////////////////

#include"stdafx.h"
#include"Text.h"


//--------------------------------------------------------------------
//Macrodefine
#defineDEFAULT_BKMODETRANSPARENT
#defineDEFAULT_TEXT_COLORRGB(0,0,0)
#defineDEFAULT_BK_COLORRGB(255,255,255)
#defineDEFAULT_FORMAT(DT_LEFT|DT_SINGLELINE)
#defineDEFAULT_TEXT_HEIGHT0


//--------------------------------------------------------------------
/**///////////////////////////////////////////////////////////////////////
//Construction/Destruction
/**///////////////////////////////////////////////////////////////////////

CText::CText()
...{
memset(&m_rcWndPos,0,sizeof(m_rcWndPos));
m_pszText=NULL;
m_ulSizeText=0;
m_iBkMode=DEFAULT_BKMODE;
m_crTextColor=DEFAULT_TEXT_COLOR;
m_crBkColor=DEFAULT_BK_COLOR;
m_uFormat=DEFAULT_FORMAT;
m_iTextHeight=DEFAULT_TEXT_HEIGHT;
}

CText::~CText()
...{
if(m_pszText!=NULL)
...{
delete[]m_pszText;
m_pszText=NULL;
}
}

//--------------------------------------------------------------------
//Description:
//Setthecontrolposition
//
//--------------------------------------------------------------------
voidCText::SetPosition(constRECT*prc)
...{
m_rcWndPos=*prc;
}


//--------------------------------------------------------------------
//Description:
//Setthetext.Ifyouwanttodisplaythetext,youshouldcalltheDisplay()
//
//--------------------------------------------------------------------
BOOLCText::SetText(constTCHAR*pszText)
...{
ULONGulLen=_tcslen(pszText);

if(m_pszText==NULL)
...{
m_pszText=newTCHAR[ulLen+1];

if(m_pszText==NULL)
...{
returnFALSE;
}

m_ulSizeText=ulLen+1;
}
elseif(ulLen+1>m_ulSizeText)
...{
delete[]m_pszText;

m_pszText=newTCHAR[ulLen+1];

if(m_pszText==NULL)
...{
returnFALSE;
}

m_ulSizeText=ulLen+1;
}

_tcscpy(m_pszText,pszText);

returnTRUE;
}


//--------------------------------------------------------------------
//Description:
//Displaythetextstored.
//
//--------------------------------------------------------------------
voidCText::Draw(HDChdc)
...{
COLORREFcrOldTextColor=::SetTextColor(hdc,m_crTextColor);
COLORREFcrOldBkColor=::SetBkColor(hdc,m_crBkColor);
intiOldMode=::SetBkMode(hdc,m_iBkMode);

LOGFONTlf=...{0};
HFONThFontNew,hFontOld;
lf.lfQuality=CLEARTYPE_QUALITY;
lf.lfHeight=-1*(m_iTextHeight*GetDeviceCaps(hdc,LOGPIXELSY)/72);//pound
hFontNew=CreateFontIndirect(&lf);
hFontOld=(HFONT)SelectObject(hdc,hFontNew);

DrawText(hdc,m_pszText,-1,&m_rcWndPos,m_uFormat);

SelectObject(hdc,hFontOld);
DeleteObject(hFontNew);

::SetTextColor(hdc,crOldTextColor);
::SetBkColor(hdc,crOldBkColor);
::SetBkMode(hdc,iOldMode);
}


//--------------------------------------------------------------------
//Description:
//Setthebackgroundmode.
//
//Parameters:
//iMode:[in]Thevalueisjustlikeasfollow:
//OPAQUE--Backgroundisfilledwiththecurrentbackgroundcolorbeforethetext,
//hatchedbrush,orpenisdrawn.
//TRANSPARENT--Backgroundremainsuntouched.

//--------------------------------------------------------------------
BOOLCText::SetBkMode(intiMode)
...{
if(iMode==OPAQUE||iMode==TRANSPARENT)
...{
m_iBkMode=iMode;
returnTRUE;
}
else
...{
returnFALSE;
}
}


//--------------------------------------------------------------------
//Description:
//Setthetextcolor
//
//--------------------------------------------------------------------
voidCText::SetTextColor(COLORREFcrColor)
...{
m_crTextColor=crColor;
}


//--------------------------------------------------------------------
//Description:
//Setthebackgroundcolor
//
//--------------------------------------------------------------------
voidCText::SetBkColor(COLORREFcrColor)
...{
m_crBkColor=crColor;
}

//--------------------------------------------------------------------
//Description:
//SetFormat.
//
//Parameters:
//ThevalueyoushouldseetheuFormatofDrawText()
//--------------------------------------------------------------------
voidCText::SetFormat(UINTuFormat)
...{
m_uFormat=uFormat;
}


//--------------------------------------------------------------------
//Description:
//Settheheightoftextaspound
//
//---------------------------------------------------------------------
voidCText::SetTextHeight(intiHeight)
...{
m_iTextHeight=iHeight;
}


//--------------------------------------------------------------------
//Description:
//Getthepositionasrect
//
//---------------------------------------------------------------------
voidCText::GetPosition(RECT*prcOut)
...{
*prcOut=m_rcWndPos;
}