Re: Print Preview (again?)

From:

"GC" <gc@freeuk.co.uk>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 30 Apr 2008 15:54:29 +0100

Message-ID:

<481887d7_1@mk-nntp-2.news.uk.tiscali.com>

This is a multi-part message in MIME format.

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Hi Joe
There's definitely a quantum jump, even if I increase the .lfHeight =
value directly, it 'sticks' at certain sizes.
In Word I can zoom out to 28% which exactly matches my preview pane. =
There, I can go from 40 to 41 and the text gets slightly bigger, bit =
still looks good.
I'm doing this at the moment:

dc.SetMapMode(MM_ISOTROPIC);

CRect rect;
GetClientRect(&rect);

dc.SetWindowExt(MM2DeviceUnits(210), MM2DeviceUnits(297));
dc.SetViewportExt(rect.Width(), rect.Height());

Greg

"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message =
news:28qg1455q95opfpr0e2srv7jbg07jtdm4q@4ax.com...

It depends on the mapping mode you are using. Word works in twips, =

for example.

Ultiimately, it deals with pixel roundoff; whatever font size 40 and =

41 are round to the

same pixel count, but 43 is probably one pixel larger. Remember the =

preview is running at

a much smaller size and hence the roundoff issues will be more =

pronounced.

joe

On Wed, 30 Apr 2008 12:52:14 +0100, "GC" <gc@freeuk.co.uk> wrote:

Thanks for that Joe. I've now tried using map modes instead and it =

looks a

lot better but I'm back where I started (when I simply scaled the font =

size)

in as much as increasing the font size from say 40 to 41 doesn't =

result in a

bigger preview font. It 'waits' until it gets to 43.
How can I achieve this? (Microsoft Word can do it!).
Greg

"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:ltgf14tpus0on0bj51vdb66icckdbcg6ai@4ax.com...

Essentially, StretchBlt will do just about the worst job you can =

imagine

for this
(actually, it doesn't matter what you're trying to do, StretchBlt =

will

probably do it
wrong). I would have simply set the map mode so that the image will =

fill

the preview
space and use whatever I get. The nice thing about this is that the =

font

will be rendered
using the ClearType best-approximation instead of being uglified by
StretchBlt.
joe

On Tue, 29 Apr 2008 15:33:43 +0100, "GC" <gc@freeuk.co.uk> wrote:

Hi
I'm getting very confused with trying to draw a small print preview =

box.

I'm
trying to draw fonts the exact proportionate size. Because I can't =

show

fractional font sizes on screen, I'm trying to draw it into a memory =

(quite big?) then StretchBlt it down onto my box (I don't mind if =

it's a

bit pixelly as long as it's in proportion).
This code works after a fashion but what do my values need to be? Do =

need
to set the map mode to a higher value? It comes about 1/3 size.
Thanks for any advice,
Greg Chapman

void CA4Page::OnPaint()
{
CPaintDC dc(this);
CDC memDC;
memDC.CreateCompatibleDC(&dc);
// ??? memDC.SetMapMode(MM_HIMETRIC);
int deviceRes = memDC.GetDeviceCaps(LOGPIXELSY);

CRect rect;
this->GetClientRect(&rect);
// this is roughly 210 x 297 ie a mm to a pixel

CRect memRect(0,0, 2100, 2970);
// nice big one for best resolution?

CBitmap bmp;
bmp.CreateCompatibleBitmap(&memDC, memRect.Width(), =

memRect.Height());

memDC.SelectObject(&bmp);

LOGFONT fontStruct;
// this fills out the struct
Utilities::FillFontStruct("Times New Roman", 0, 0, 4, fontStruct);

CString str("Hello World");

CFont font;
int pointSize = 60;

fontStruct.lfHeight = (int)-MulDiv(pointSize, deviceRes, 72);
font.CreateFontIndirect(&fontStruct);
memDC.SelectObject(&font);
memDC.DrawText(str, memRect, 0);

dc.StretchBlt(rect.left, rect.top, rect.Width(), rect.Height(),
&memDC, 0, 0, memRect.Width(), memRect.Height(),
SRCCOPY);
}

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; =
charset=iso-8859-1">
<META content="MSHTML 6.00.6000.16640" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV>Hi Joe</DIV>
<DIV>There's definitely a quantum jump, even if I =
increase the
..lfHeight value directly, it 'sticks' at certain sizes. </DIV>
<DIV>In Word I can zoom out to 28% which exactly =
matches my
preview pane. There, I can go from 40 to 41 and the text gets slightly =
bigger,
bit still looks good.</DIV>
<DIV>I'm doing this at the moment:</DIV>
<DIV> </DIV>
<DIV> dc.SetMapMode(MM_ISOTROPIC); </DIV>
<DIV> CRect
rect;  GetClientRect(&rect);     dc.SetWindowExt(MM2DeviceUnits(210), 
MM2DeviceUnits(297));  dc.SetViewportExt(rect.Width(),
rect.Height());</DIV>
<DIV> </DIV>
<DIV>Greg</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>"Joseph M. Newcomer" <<A
href="mailto:newcomer@flounder.com">newcomer@flounder.com</A>> =
wrote in
message <A =
href="news:28qg1455q95opfpr0e2srv7jbg07jtdm4q@4ax.com">news:28qg1455q95opfpr0e2srv7jbg07jtdm4q@4ax.com</A><F=
ONT
face=Arial>...</DIV>> It depends on the =
mapping mode
you are using.  Word works in twips, for example. > =
Ultiimately, it
deals with pixel roundoff; whatever font size 40 and 41 are round to =
the >
same pixel count, but 43 is probably one pixel larger.  Remember =
the
preview is running at > a much smaller size and hence the roundoff =
issues
will be more pronounced. > joe > > On Wed, 30 Apr =
2008
12:52:14 +0100, "GC" <<A href="mailto:gc@freeuk.co.uk">gc@freeuk.co.uk</A>> =
wrote: >
 >>Thanks for that Joe. I've now tried using map modes instead =
and it
looks a >>lot better but I'm back where I started (when I =
simply
scaled the font size) >>in as much as increasing the font size =
from
say 40 to 41 doesn't result in a >>bigger preview font. It =
'waits'
until it gets to 43. >>How can I achieve this? (Microsoft Word =
can do
it!). >>Greg >> >> >>"Joseph M. =
Newcomer"
<<A href="mailto:newcomer@flounder.com">newcomer@flounder.com</A>> =
wrote in
message
 >>news:ltgf14tpus0on0bj51vdb66icckdbcg6ai@4ax.com... >&gt=
;>
Essentially, StretchBlt will do just about the worst job you can imagine =

 >>> for this >>> (actually, it doesn't matter =
what
you're trying to do, StretchBlt will >>> probably do
it >>> wrong).  I would have simply set the map mode so =
that
the image will fill >>> the preview >>> space =
and use
whatever I get.  The nice thing about this is that the font
 >>> will be rendered >>> using the ClearType
best-approximation instead of being uglified by >>>
StretchBlt. >>> joe >>> >>> On Tue, =
29 Apr
2008 15:33:43 +0100, "GC" <<A =
href="mailto:gc@freeuk.co.uk">gc@freeuk.co.uk</A>>
wrote: >>> >>>>Hi >>>>I'm =
getting very
confused with trying to draw a small print preview box.
 >>>>I'm >>>>trying to draw fonts the =
exact
proportionate size. Because I can't show >>>>fractional =
font
sizes on screen, I'm trying to draw it into a memory
DC >>>>(quite big?)  then StretchBlt it down onto my =
box (I
don't mind if it's a >>>>bit pixelly as long as it's in
proportion). >>>>This code works after a fashion but what =
do my
values need to be? Do I >>>>need >>>>to =
set the
map mode to a higher value? It comes about 1/3 =
size. >>>>Thanks
for any advice, >>>>Greg
Chapman >>>> >>>>void
CA4Page::OnPaint() >>>>{ >>>> CPaintDC
dc(this); >>>> CDC memDC; >>>>
memDC.CreateCompatibleDC(&dc); >>>> // ???
memDC.SetMapMode(MM_HIMETRIC); >>>> int deviceRes =
memDC.GetDeviceCaps(LOGPIXELSY); >>>> >>>>&=
nbsp;
CRect rect; >>>>
this->GetClientRect(&rect); >>>> // this is =
roughly 210 x
297 ie a mm to a pixel >>>> >>>> CRect
memRect(0,0, 2100, 2970); >>>> // nice big one for best
resolution? >>>> >>>> CBitmap
bmp; >>>> bmp.CreateCompatibleBitmap(&memDC, =
memRect.Width(),
memRect.Height()); >>>>
memDC.SelectObject(&bmp); >>>> >>>> =
LOGFONT
fontStruct; >>>> // this fills out the =
struct >>>>
Utilities::FillFontStruct("Times New Roman", 0, 0, 4,
fontStruct); >>>> >>>> CString str("Hello
World"); >>>> >>>> CFont =
font; >>>>
int pointSize = 60; >>>> >>>> =
fontStruct.lfHeight
= (int)-MulDiv(pointSize, deviceRes, 72); >>>>
font.CreateFontIndirect(&fontStruct); >>>>
memDC.SelectObject(&font); >>>> memDC.DrawText(str, =
memRect,
0); >>>> >>>> dc.StretchBlt(rect.left, =
rect.top,
rect.Width(),
rect.Height(), >>>>      &nb=
sp;      
&memDC,  0, 0,  memRect.Width(), 
memRect.Height(), >>>>      =
       
SRCCOPY); >>>>} >>>> </BODY></HTM=
L>

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