How to calculate width and height of different font size ,font style and no of characters ?

[shiv nand]

Hi i want to crate a rectangle based on the font size, font style,and number of charactes.So How can i decide width and height of different font size,font style & number of characters.

[Adam Roderick J]

You can get the font information from CWnd member GetFont(http://msdn.microsoft.com/en-us/library/cb4schcy(VS.80).aspx) And GetLogFont of the CFont will help get the information about the font. http://msdn.microsoft.com/en-us/library/zhcs623h(v=VS.71).aspx

Величие не Бога может быть недооценена.

[Eugen Podsypalnikov]

This function could calculate the text dimensions :) :

void GetTextSize(CSize& cResultSize, // Receiving size of the text rectangle
CDC* pcDC, // Surface context
CFont* pcFont, // Font for the context
const CString& cszText) // Text to measure
{
if (pcDC && pcFont) {
CGdiObject* pcOldFont = pcDC->SelectObject(pcFont);
cResultSize = pcDC->GetTextExtent(cszText); // dimensions of the text
// at the given surface
// with the given font
pcDC->SelectObject(pcOldFont);
}
}

virtual void BeHappy() = 0;

modified on Friday, April 2, 2010 2:12 AM

[shiv nand]

Please can you me an example.

[Eugen Podsypalnikov]

It could be something like this :) :

/*virtual*/ void CYourView::OnDraw(CDC* pDC)
{
if (pDC) {
CString cszText(_T("Hello World !"));
// Calculate the text rectangle from the start point(100, 100)
// at this surface with the actual set font
CRect cTextRect(CPoint(100, 100),
pDC->GetTextExtent(cszText));
pDC->FillSolidRect(cTextRect, RGB(0, 200, 0)); // Text background
pDC->DrawText(cszText, cTextRect, DT_LEFT | DT_TOP);
}
}

virtual void BeHappy() = 0;

[shiv nand]

actually i want create a Button based on fontsize fontstyle ,no of characters and font type.I dont know what actul text or characters. only i have a options like. No of characters : 50 Font Size : 16 Font Style : Regular/Bold/Italic Font Type : Times New Roman or Arial or Courier How width and height can be decided for the above ? so i can create a Button by assigning width and height easily .

[Eugen Podsypalnikov]

Try it :) :

#define GAP 20
CSize GetButtonDimensions(int iCharCount,
int iFontSize,
const CString& cszFontName)
{
CSize cResultSize(0, 0);

CFont cFont;
if (cFont.CreatePointFont(iFontSize * 10, cszFontname)) {
CDC cDC;
if (cDC.CreateCompatibleDC(NULL)) {
CGdiObject* pcOldFont = cDC.SelectObject(cFont);

  TEXTMETRIC tm = {0};
  cDC.GetTextMetrics(&tm);


  cResultSize.cy = tm.tmHeight                    + 2 \* GAP;
  cResultSize.cx = tm.tmMaxCharWidth \* iCharCount + 2 \* GAP;


  cDC.SelectObject(pcOldFont);
}
cFont.DeleteObject();

}

return cResultSize;
}

virtual void BeHappy() = 0;

[shiv nand]

i am getting error : [CGdiObject* pcOldFont = cDC.SelectObject(cFont);] 'initializing' : cannot convert from 'HGDIOBJ' to 'CGdiObject *'

[Eugen Podsypalnikov]

Sorry, ..cDC.SelectObject(&cFont); :)

virtual void BeHappy() = 0;

[shiv nand]

Thank You Eugen Podsypalnikov i got.