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VC++ Codes: Draw text along line and draw rotate text

 
 

draw text along line or draw rotate text


void CAestheticLinesView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	 // If the left mouse button is released while we're tracking, release
    // the mouse if it's currently captured, erase the last rubber-band
    // line, and draw a thick red line in its place.
    //
    if (m_bTracking)
	{
        m_bTracking = FALSE;
        if (GetCapture () == this)
            ::ReleaseCapture ();

        CClientDC dc (this);
        InvertLine (&dc, m_ptFrom, m_ptTo);

		CPen pen (PS_SOLID, 2, RGB (0, 128,0));
		dc.SelectObject (&pen);


		//Draw the line 
		//You may uncomment thee following two lines ,to show line 
		// dc.MoveTo (m_ptFrom);
		// dc.LineTo (point);



		//calculate the slope of this line
		if(point.x-m_ptFrom.x==0) return;
		float slope= -(point.y -m_ptFrom.y)/(point.x-m_ptFrom.x);
		//find the inclination 
		float ang=atan2(m_ptFrom.y-point.y,point.x-m_ptFrom.x)*180.0f/3.1415927f;


		LOGFONT lf;
		lf.lfCharSet=SYMBOL_CHARSET;//For Symbol Fonts like  "Wingdings"
		lf.lfHeight=60;
		lf.lfEscapement=(long)ang*10;//Angle of the text
		lf.lfOrientation=(long)ang*10;//Angle of the text
		lf.lfItalic=false;
		lf.lfStrikeOut=false;
		lf.lfUnderline=false;
		lf.lfQuality=ANTIALIASED_QUALITY;
		//	lf.lfWeight=FW_BOLD;

		strcpy(lf.lfFaceName,_T("Wingdings"));//Select the desired font
		//strcpy(lf.lfFaceName,_T("Webdings"));//Select the desired font



		CFont fnt;
		fnt.CreateFontIndirect(&lf);//Create a Font object for the current Font
		dc.SetBkMode(TRANSPARENT);//To see that there's no clutter incase of overlap 
		dc.SelectObject(fnt);//Select the font for drawing text



		CString str;
		str=0x96;//0x5A ; //0xCB;//0x5E;//0x5D;//0xCB;//0x5c;//Hexadecimal value of the desired character/symbol from Character Map



		CSize sz=dc.GetTextExtent(str);//Do not use strlen() function
		int textwidth= sz.cx;//Widht of Symbol in pixels for the currently selected  Font



		//Length of line segement 
		float dist= sqrt( (point.y - m_ptFrom.y  )*(point.y-m_ptFrom.y )+(point.x-m_ptFrom.x)*(point.x-m_ptFrom.x) ) ;


		//Add Symbol to the text until the width of string is less than length of line
		while(textwidth < dist )
		{

		  str+=0x96;// 0x5A ; //0xCB;  //0x5E;//0x5D;//0xCB;//0x5c;

		  textwidth=dc.GetTextExtent(str).cx;

		}

		//dc.SetTextAlign(TA_BASELINE);
		dc.SetTextColor(RGB(0,128,0));
		dc.TextOut(m_ptFrom.x,m_ptFrom.y,str);//Voila !! , Here's is the Line Pattern


		}

		CView::OnLButtonUp(nFlags, point);
}

 

 

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