RichEdit Problems

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DuXeN0N

Joined: 05 May 2009
Posts: 6

DuXeN0N 09 May 2009, 04:42

I tried to make my notepad with RichEdit control but I have found a problem with selecting font. I have made FontDialog but it's return value is LOGFONT struct. How can I translate LOGFONT to CHARFORMAT?

PS: I declared CHARFORMAT on my own:

struct CHARFORMAT
cbSize dd ?
dwMask dd ?
dwEffects dd ?
yHeight dd ?
yOffset dd ?
crTextColor dd ?
bCharSet db ?
bPitchAndFamily db ?
szFaceName db 32 dup(?)
_wPad2 dd ?
ends

09 May 2009, 04:42

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20481
Location: In your JS exploiting you and your system

revolution 09 May 2009, 11:11

I presume you could copy each of the related members from LOGFONT into the CHARFORMAT structure?

A quick glance shows me:

lfFaceName <=> szFaceName
lfCharSet <=> bCharSet
lfHeight <=> yHeight
etc.

09 May 2009, 11:11

DuXeN0N

Joined: 05 May 2009
Posts: 6

DuXeN0N 09 May 2009, 11:33

revolution wrote:

I presume you could copy each of the related members from LOGFONT into the CHARFORMAT structure?

A quick glance shows me:

lfFaceName <=> szFaceName
lfCharSet <=> bCharSet
lfHeight <=> yHeight
etc.

How can I do this? I am beginner)

09 May 2009, 11:33

pal

Joined: 26 Aug 2008
Posts: 227

pal 09 May 2009, 12:20

mov eax, value in logfont
mov value in logfont, eax

e.g.

Code:

mov eax,lfFaceName
mov szFaceName,eax

09 May 2009, 12:20

DuXeN0N

Joined: 05 May 2009
Posts: 6

DuXeN0N 09 May 2009, 12:40

okey. and the last question, how can I change font in EDIT from LOGFONT? What struct should I use for EDIT?

09 May 2009, 12:40

DuXeN0N

Joined: 05 May 2009
Posts: 6

DuXeN0N 10 May 2009, 02:13

I tried to copy each of the related members from LOGFONT into the CHARFORMAT but an error occured:

operand sizes do not match.

code:

invoke ChooseFont,cf
mov [lf],eax

mov [chf.cbSize],sizeof.CHARFORMAT

mov eax,lf.lfHeight
mov [chf.yHeight],eax

mov eax,lf.lfFaceName
mov [chf.szFaceName],eax

invoke SendMessage,[hRichEdit],EM_SETCHARFORMAT,SCF_SELECTION,0
jmp .finish

and one question.

how can I copy

BYTE lfItalic;
BYTE lfUnderline;
BYTE lfStrikeOut;

to CHARFORMAT

DWORD dwEffects;

10 May 2009, 02:13

pal

Joined: 26 Aug 2008
Posts: 227

pal 10 May 2009, 08:36

Try something like (not tested as I aint making a RTB):

Code:

           mov             [cf.lStructSize],sizeof.CHOOSEFONT
          mov             [cf.Flags],CF_INITTOLOGFONTSTRUCT
           mov             [cf.lpLogFont],lf
           invoke  ChooseFont,cf
               test    eax,eax
             je              codeEnd
             
            mov     eax,[lf.lfHeight]
           mov             [chf.yHeight],eax
           mov     eax,[lf.lfFaceName]
         mov             [chf.szFaceName],eax
                mov             [chf.dwEffects],
            
            invoke  SendMessage,[hRichEdit],EM_SETCHARFORMAT,SCF_SETSELECTION,chf
               
    codeEnd:
                ret

Your code is completely wrong. ChooseFront doesn't return a structure. You pass a pointer to a structure and it fills the items. If you set the flags to CF_INITTOLOGFONTSTRUCT and lpLogFont is a pointer to an initalised LOGFONT structure, it will fill that for you.

For the dwEffects, just check the value of each of the members of LOGFONT, and if they are set then or the corresponding value with the CHARFORMAT (CFE_BOLD, CFE_ITALIC, CFE_UNDERLINE etc.).

10 May 2009, 08:36

DuXeN0N

Joined: 05 May 2009
Posts: 6

DuXeN0N 10 May 2009, 08:59

pal wrote:

Try something like (not tested as I aint making a RTB):
Code:
           mov             [cf.lStructSize],sizeof.CHOOSEFONT
          mov             [cf.Flags],CF_INITTOLOGFONTSTRUCT
           mov             [cf.lpLogFont],lf
           invoke  ChooseFont,cf
               test    eax,eax
             je              codeEnd
             
            mov     eax,[lf.lfHeight]
           mov             [chf.yHeight],eax
           mov     eax,[lf.lfFaceName]
         mov             [chf.szFaceName],eax
                mov             [chf.dwEffects],
            
            invoke  SendMessage,[hRichEdit],EM_SETCHARFORMAT,SCF_SETSELECTION,chf
               
    codeEnd:
                ret     
Your code is completely wrong. ChooseFront doesn't return a structure. You pass a pointer to a structure and it fills the items. If you set the flags to CF_INITTOLOGFONTSTRUCT and lpLogFont is a pointer to an initalised LOGFONT structure, it will fill that for you.

For the dwEffects, just check the value of each of the members of LOGFONT, and if they are set then or the corresponding value with the CHARFORMAT (CFE_BOLD, CFE_ITALIC, CFE_UNDERLINE etc.).

mov eax,[lf.lfFaceName]

operand sizes do not match

10 May 2009, 08:59

pal

Joined: 26 Aug 2008
Posts: 227

pal 10 May 2009, 09:43

Move it to ax or use movzx then.

10 May 2009, 09:43

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20481
Location: In your JS exploiting you and your system

revolution 10 May 2009, 09:46

lfFaceName is a pointer to a string. You need to copy all of the bytes. That is, you need multiple mov instructions to do it (or maybe rep movs).

10 May 2009, 09:46

pal

Joined: 26 Aug 2008
Posts: 227

pal 10 May 2009, 12:42

Oops yeah, my bad. I aint gonna update my code as its pretty easy to do.

10 May 2009, 12:42

DuXeN0N

Joined: 05 May 2009
Posts: 6

DuXeN0N 11 May 2009, 04:51

can Tomasz Grysztar give me example of RichEdit with ChoseFont Dialog?

11 May 2009, 04:51

habran

Joined: 31 Aug 2008
Posts: 82
Location: South Australia

habran 11 May 2009, 12:21

Hi DuXeN0N,

You can find all you need for RichEditor here:
http://board.flatassembler.net/topic.php?t=9144
You can find ChooseFont in FormatFonts.asm file

happy fasming

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11 May 2009, 12:21

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