Re: GetTextExtent and Window Placement

Hello, Newsgroupians:

I've yet another question that's been taxing my brain.

Here's my scenario. I've two windows: a parent window and a child window.
In the parent window, I'm creating a font that's at a ninety degree angle
to
the horizontal. In the WM_PAINT handler, with the font I created, I get
the
extents of a specific string. Once I have the extents of the string, I
reposition the child window to be the entire height of the parent window
subtract the extent of the text. Finally, I write text below the child
window.

The GUI representation is as follows...

|-----------------------------------|
| |--------------------------------| |
| | | |
| | (CHILD) | |
| | | |
| | | |
| |--------------------------------| |
| X |
| X |
|-----------------------------------|

(Note: The two X's are a string, but it's written vertically)

Here's my code.

// These 6 lines change the extents and moves the origin to the bottom
left
and makes
// the coordinates a cartesian-style [+x = right, +y = up]

CRect rect;
this->GetClientRect(&rect);
pDC->SetMapMode(MM_ANISOTROPIC);
pDC->SetWindowExt(32767, 32767);
pDC->SetViewportExt(rect.right, -rect.bottom);
pDC-> SetViewportOrg(0, rect.bottom);

// Create the font
CFont font;
font.CreateFont(32767 / 75, 32767 / 100, 900, 900, FW_DONTCARE, FALSE,
FALSE, FALSE,
                      ANSI_CHARSET, OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS,
                      DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE,
_T("Arial"));
CFont *pOrigFont = pDC->SelectObject(&font);

// Get the extent
CSize ext;
::GetTextExtentPoint32(pDC->m_hAttribDC, _T("Canoe"), 5, &ext);

// Convert the extent to DP, so I can move the CHILD window
pDC->LPtoDP(&ext);

// Move the CHILD window
// Notice I use ext.cx and not .cy
this->m_wndChild.MoveWindow(0, 0, rect.right, rect.bottom - ext.cx);

// Finally, draw the text below the child window
pDC->DPtoLP(&ext);
pDC->TextOut(32767 / 2, ext.cx, _T("Canoe"));

Hopefully it wasn't too big or hard to understand.

My problem is that the word Canoe is always clipped by the parent Window.
Depending on the dimensions of the parent window, my text can be seen in
its
entirety or the text is clipped. I can read "Can" and a half an 'o' at
times, or the entire word. It's very strange.

Another anomaly I experience is if I place the text ABOVE the child
window,
it is always "correct." That is, the text is never clipped.

this->m_wndChild.MoveWindow(0, ext.cx, rect.right, rect.bottom - ext.cx);
...
pDC->TextOut(32767 / 2, ext.cx, _T("Canoe"));

Why is does it act correctly -- no clipping -- when I place the text atop
the child window as opposed to placing it below the child window?

Now, I've read ::GetTextExtentPoint32(...) and it states "that the angle
of
escapement is always assumed to be 0... for both vertical and horizontal
fonts." Was it incorrect for me to assume that the .cx is the height? Do
I
need to do a conversion? This is the only thing I can think of.

Thank you, Newgroupians, for your continued support.

Trecius