RichEdit with nsDialogs?
 

I can't seem to figure out how to add a RichEdit control with nsDialogs. I've tried

But nothing shows. I tried looking at the MUI2 header files, but those are no cakewalk to read. I also glanced at the nsDialogs source files, but that lead me no closer to an answer.

RICHEDIT_CLASS is not the real name, try "RICHEDIT" or "RichEdit20A"

Thanks, RichEdit20A worked.

Hi!

Now that I know how to create a richedit control using nsDialogs - thanks for that - how would I go about loading an .rtf file into the control using the system plugin?

Thanks in advance.

Brad.

Thanks for your response, Anders.

The thread you've linked to though has example code that, as best as I can tell, only streams text into the control. Is there any [easy] way to load an actual Rich Text File into the control? I've tried googling for a Windows API command that can do it, but with no luck...

its the same message (http://msdn2.microsoft.com/en-us/lib...02(VS.85).aspx )

just use SF_RTF (2)

and easy? there is no such thing when the system plugin is involved ;)

Thanks again! I'll give it a go.... :D

I just use this to load the RTF data. The article states '.txt' files, but RTF are just text files with funky formatting.

http://nsis.sourceforge.net/External_License_file

Also, if you want a thin border on the RichEdit box, just use the WS_EX_STATICEDGE flag instead of __NSD_Text_EXSTYLE.

Here's the full code I use:

Thanks for your help, vbguy! Here's my code:

code:
  

  nsDialogs::CreateControl /NOUNLOAD "RichEdit20A" ${WS_VISIBLE}|${WS_CHILD}|\

    ${WS_TABSTOP}|${WS_VSCROLL}|${ES_MULTILINE}|\

    ${ES_WANTRETURN} ${WS_EX_STATICEDGE} 0 15u 100% 80u ""

  Pop $CONTROL

  File "/oname=$PLUGINSDIR\Readme.rtf" "Resources\Readme.rtf"

  System::Call "kernel32::CreateFile(t '$PLUGINSDIR\Readme.rtf', i ${GENERIC_READ}, \

    i ${FILE_SHARE_READ}, i 0, i ${OPEN_EXISTING}, i 0, i 0) i .r0"

  System::Call "kernel32::GetFileSize(i r0, i 0) i .r1"

  MessageBox MB_OK "$1"

  IntOp $1 $1 + 1

  System::Alloc $1

  Pop $2

  System::Call "kernel32::ReadFile(i r0, i r2, i r1, *i .r3, i 0)"

  System::Call "kernel32::CloseHandle(i r0)"

  SendMessage $CONTROL ${WM_SETTEXT} $CONTROL $2

  System::Free $2

Unfortunately, it doesn't display all of the RTF file. I'm guessing this is because of the value that GetFileSize returns, and the additional bytes used for the formatting of the RTF file. I tried using EM_STREAMIN as Anders suggested, but I'm completely lost with that bit of code.... Any further ideas?

Brad.

You need to replace the hwnd to point to your added text box (or rich text box):

Then, deallocate the memory when the installer closes:

vbguy: you can't use WM_SETTEXT, it seems to work for some simple rtf files, but not everything

Thanks for your help guys.

Anders, any chance you could give us some example code that streams an .rtf file into a richtext control using EM_STREAMIN? Please? Before I lose any more hair? :eek:

no, can't make it work, I end up with the same problem as WM_SETTEXT, the file will not load 100%

You're right, it would likely fail if embedded images. I'd also like to see an example using streaming (if you have time).

Edit: Where in the MUI2 code is the RTF data loaded for the standard license page? Is it done using a C/C++ plugin, or is the file loaded using NSIS code?

Couldn't we just hijack the default code and apply it to the newly created RichEdit box?

Fixed! It's always something simple that's causing the problem isn't it?

All you have to do is use EM_EXLIMITTEXT to set the size of the rich text control!

code:
  ; Show the License.

  nsDialogs::CreateControl /NOUNLOAD "RichEdit20A" ${WS_VISIBLE}|${WS_CHILD}|${WS_TABSTOP}|${WS_VSCROLL}|${ES_MULTILINE}|\

    ${ES_WANTRETURN} ${WS_EX_STATICEDGE} 0 15u 100% 80u ""

  Pop $CONTROL

  File "/oname=$PLUGINSDIR\${GNU_GENERAL_PUBLIC_LICENSE}.rtf" "Resources\${GNU_GENERAL_PUBLIC_LICENSE}.rtf"

  System::Call "kernel32::CreateFile(t '$PLUGINSDIR\${GNU_GENERAL_PUBLIC_LICENSE}.rtf', i ${GENERIC_READ}, \

    i ${FILE_SHARE_READ}, i 0, i ${OPEN_EXISTING}, i 0, i 0) i .r0"

  System::Call "kernel32::GetFileSize(i r0, i 0) i .r1"

  IntOp $1 $1 + 1

  System::Alloc $1

  Pop $2

  System::Call "kernel32::ReadFile(i r0, i r2, i r1, *i .r3, i 0)"

  System::Call "kernel32::CloseHandle(i r0)"

  SendMessage $CONTROL ${EM_EXLIMITTEXT} 0 $1

  SendMessage $CONTROL ${WM_SETTEXT} 0 $2

  System::Free $2

that changes nothing, thats only the length, even a rtf file less than 300bytes will not load, atleast not for me

That's strange. The RTF file I'm using is about 58Kb. Without sending that EM_EXLIMITTEXT message, it wouldn't display the last quarter of the file. With the message, it displays it fine.

I just tested your file with the WM_SETTEXT method, and it works for me (even without EM_EXLIMITTEXT message).

Thanks, bradharding, for finding that flag.

alright, I think this works

code:
!define SF_RTF 2

!define EM_STREAMIN 1097

!define EM_EXLIMITTEXT 1077

Function lic

FileOpen $4 "test.rtf" r

FindWindow $0 "#32770" "" $HWNDPARENT

GetDlgItem $0 $0 1000

SendMessage $0 ${EM_EXLIMITTEXT} 0 0x7fffffff

System::Get /NoUnload "(i, i .R0, i .R1, i .R2) iss"

Pop $2

System::Call /NoUnload "*(i 0, i 0, k r2) i .r3"

System::Call /NoUnload "user32::SendMessage(i r0, i ${EM_STREAMIN}, i ${SF_RTF}, i r3) i.s"

loop:

	Pop $0

	StrCmp $0 "callback1" 0 done

	System::Call /NoUnload "kernel32::ReadFile(i $4, i $R0, i $R1, i $R2, i 0)"

	Push 0 # callback's return value

	System::Call /NoUnload "$2"

	goto loop 

done:

System::Free $2

System::Free $3

FileClose $4

FunctionEnd

the code is a little bit longer than the WM_SETTEXT code, but it does not alloc the whole file at once, and does not know or care about the filesize at all

Sweet. Now that all this is known, maybe someone can submit it for inclusion into the nsDialogs.nsh header.

You should.

I meant to include it as a built-in part of the nsDialogs. I could include it with my own nsDialogs.nsh file, but I'd just overwrite it the next time I updated to a newer official version.

Also, I think the community would benefit by having all the RichEdit particulars figured out in the nsDialogs.nsh.

I didn't mean to belittle your work.

If you were implying that I should do the work, then I would be glad to. I have just a couple of questions, though:

1. On what version of nsDialogs.nsh do I base my work? The latest svn version, or the latest "stable" version?

2. In what form do I post the results? A patch file or the full file?

3. Where do I post the results? Here, or is there another NSIS developer forum?

I misread it as "maybe I should submit it for inclusion" and wanted to encourage you to do so by letting you know I will include it in the next version.

If you wish to make the change and submit it, you should base your work on the latest nsDialogs.nsh from Subversion. But even if you don't, this is not a fundamental change, so a patch for 2.35's version won't be hard to apply.

The best way is to submit a patch to patch tracker, but a full file would work as well.

I made a test file:

But nothing was shown in RichEdit. What am I doing wrong?
Also, anybody say how can I show custom text in RichEdit without using RTF file?

Thanks in advance!

Okay, I find a way to display RTF with aforementioned code. But now I got another problem: if I go back to page with custom RTF, then nothing is shown is RichEdit. I've found, that
Pop $0 returns 0 :cry:

Can anybody help me to solve this issue?

I've found an other way to solve my problem

Hope, it'll help someone.
Here is link to the plugin: http://nsis.sourceforge.net/CustomLicense_plug-in ;)

for what it's worth - I think the actual problem is that callback1 rolls over to callback2 the next time your page is generated.

I'm not sure if there's an appropriate method to prevent that, but you can always make the "callback1" check more dynamic by Pop'ing it into a var first, then Push'ing it back onto the stack, and then compare against that var.

Here's a function + macro + define (I'll post to wiki after review from smarter people):

code:


/* Check if LoadRTFincluded is defined so that LoadRTF can't be included twice */

!ifndef LoadRTFincluded



/*

    Defines used by LoadRTF

*/

!ifndef SF_RTF

    !define SF_RTF 2

!endif

!ifndef EM_STREAMIN

    !define EM_STREAMIN 1097

!endif

!ifndef EM_EXLIMITTEXT

    !define EM_EXLIMITTEXT 1077

!endif



/*

    LoadRTF Main Function

    Inserted via macro for Installer vs Uninstaller



    Loads an RTF file into a RichEdit20a control



    Thanks to Anders for all the heavy work

    Define/Macro/Functionfication and a CallbackN tweak by Animaether



    Usage:

        Push Path-to-RTF-file

        Push HWND-of-RichEdit20A-control

        Call LoadRTF



        -or for uninstallers-

        Call un.LoadRTF

*/

!macro LoadRTFfunc Un

Function ${Un}LoadRTF

                            ; RichEdit20A.hwnd RTFilePath.string

    Exch $0                 ; $0 RTFilePath.string                  ; $0 = RichEdit20A.hwnd

    Exch                    ; RTFilePath.string $0

    Exch $1                 ; $1 $0                                 ; $1 = RTFilePath.string

    Push $2                 ; $2 $1 $0                              ; $2 : Callback address

    Push $3                 ; $3 $2 $1 $0                           ; $3 : EDITSTREAM structure

    Push $4                 ; $4 $3 $2 $1 $0                        ; $4 : callbackN identifier from System plugin to check against

    Push $R0                ; $R0 $4 $3 $2 $1 $0                    ; $R0 : Buffer that receives data from ReadFile()

    Push $R1                ; $R1 $R0 $4 $3 $@ $1 $0                ; $R1 : Maximum number of bytes to read using ReadFile()

    Push $R2                ; $R2 $R1 $R0 $4 $3 $@ $1 $0            ; $R2 : Number of bytes actually read using ReadFile()



    SendMessage $0 ${EM_EXLIMITTEXT} 0 0x7fffffff



    System::Get "(i, i .R0, i .R1, i .R2) iss"

    Pop $2



    System::Call "*(i 0, i 0, k r2) i .r3"

    System::Call "user32::SendMessage(i r0, i ${EM_STREAMIN}, i ${SF_RTF}, i r3) i.s"

    Pop $4

    Push $4



    ClearErrors

    FileOpen $1 "$1" r                                              ; $1 = RTFile.handle

    _loop:

        Pop $0                                                      ; $0 = callbackN identifier from System plugin.

        StrCmp $0 "$4" 0 _done        ; check if System plugin's callbackN matches the stored callbackN

        System::Call "kernel32::ReadFile(i $1, i $R0, i $R1, i $R2, i 0)"

        Push 0 # callback's return value

        System::Call "$2"

        goto _loop

    _done:

    FileClose $1

    System::Free $3

    System::Free $2



                            ; $R2 $R1 $R0 $4 $3 $2 $1 $0

    Pop $R2                 ; $R1 $R0 $4 $3 $2 $1 $0

    Pop $R1                 ; $R0 $4 $3 $2 $1 $0

    Pop $R0                 ; $4 $3 $2 $1 $0

    Pop $4                  ; $3 $2 $1 $0

    Pop $3                  ; $2 $1 $0

    Pop $2                  ; $1 $0

    Pop $1                  ; $0

    Pop $0                  ; -empty-

FunctionEnd

!macroend

!insertmacro LoadRTFfunc ""

!insertmacro LoadRTFfunc "un."



/*

    LoadRTF Ease of use functions.



    Simplifies usage of LoadRTF.



    Usage:

        ${LoadRTF} "Path-to-RTF-file" HWND-of-RichEdit20A-control

        -or for uninstallers-

        ${un.LoadRTF} "Path-to-RTF-file" HWND-of-RichEdit20A-control

*/

!macro LoadRTF file hwnd

    Push "${file}"

    Push ${hwnd}

    Call LoadRTF

!macroend

!define LoadRTF `!insertmacro LoadRTF`



!macro un.LoadRTF file hwnd

    Push "${file}"

    Push ${hwnd}

    Call un.LoadRTF

!macroend

!define un.LoadRTF `!insertmacro LoadRTF.un`



/* define LoadRTFincluded so that LoadRTF can't be included twice */

!define LoadRTFincluded



!endif

Usage is pretty simple. Presuming you have the above saved in "LoadRTF.nsh":

code:


!addplugindir "."

!addincludedir "."



!include "nsDialogs.nsh"

!include "winmessages.nsh"

!include "logiclib.nsh"

!include "MUI2.nsh"



!include "LoadRTF.nsh"



OutFile "test.exe"



var dialog

var hwnd

var null



Page custom null ; just for testing

Page custom test

Page custom null ; just for testing



Function .onInit

    InitPluginsDir

FunctionEnd



var RichEditControl

Function test

    nsDialogs::Create 1018

        Pop $dialog



    nsDialogs::CreateControl "RichEdit20A" \

        "${DEFAULT_STYLES}|${WS_TABSTOP}|${WS_VSCROLL}|${ES_MULTILINE}|${ES_READONLY}" \

        "${WS_EX_WINDOWEDGE}|${WS_EX_CLIENTEDGE}" \

        0 0 100% 100% ""



        Pop $RichEditControl

        SetOutPath "$PLUGINSDIR"

        File "helloworld.rtf"

        ${LoadRTF} "$PLUGINSDIR\helloworld.rtf" $RichEditControl



    nsDialogs::Show

FunctionEnd



Function null

    nsDialogs::Create 1018

        Pop $dialog



    ${NSD_CreateLabel} 0 0 100% 8% "Dummy page."

        Pop $null



    nsDialogs::Show

FunctionEnd



Section

SectionEnd

*crosses fingers*

I've found more easy way (see my next post) to fix probkem with RTF.
But thanks anyway :)

I know - it's just there for completeness sake and for those who can't, or don't want to, rely on plugins :)

Show Rich text in control
 

I want to show some rich text in a Label that does not come from any file. Soemthing like

This is bold and this is in italics and this is underlined.
The text gets generated dynamically at run time, so i cant use multiple controls. Kindly suggest how can I achieve this
thanks for your help