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Author Topic: wxSmith Couldn't Add New Handler  (Read 12054 times)

Offline Lowkus

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wxSmith Couldn't Add New Handler
« on: May 16, 2018, 11:08:42 pm »
When I try to look at the events list in wxSmith, on any of three forms, it is not showing the events that I had created through wxSmith in the past.  If I try to add an event now, wxSmith asks me for an event name and I enter a unique name, then it throws an error "Couldn't Add New Handler".  Querying the search engines for answers, someone said it can happen when the project file points to incorrect files, but I don't see anything wrong (see code).  What is the reason that wxSmith is failing to handle events correctly?  How can I get it working again?

Code
		<Extensions>
			<code_completion />
			<envvars />
			<debugger />
			<wxsmith version="1">
				<gui name="wxWidgets" src="src\cshpApp.cpp" main="frmTr" init_handlers="necessary" language="CPP" />
				<resources>
					<wxFrame wxs="wxsmith/frmMa.wxs" src="src/frmMa.cpp" hdr="src/inc/frmMa.h" fwddecl="0" i18n="1" name="frmMa" language="CPP" />
					<wxFrame wxs="wxsmith/frmPa.wxs" src="src/frmPa.cpp" hdr="src/inc/frmPa.h" fwddecl="0" i18n="1" name="frmPa" language="CPP" />
					<wxFrame wxs="wxsmith/frmTr.wxs" src="src/frmTr.cpp" hdr="src/inc/frmTr.h" fwddecl="0" i18n="1" name="frmTr" language="CPP" />
				</resources>
			</wxsmith>
		</Extensions>
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Offline oBFusCATed

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Re: wxSmith Couldn't Add New Handler
« Reply #1 on: May 17, 2018, 12:24:31 am »
Can you reproduce this problem on a minimal sample project?
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Offline Lowkus

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Re: wxSmith Couldn't Add New Handler
« Reply #2 on: May 17, 2018, 04:10:10 am »
I don't get the error when I create a new simple project.
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Offline oBFusCATed

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Re: wxSmith Couldn't Add New Handler
« Reply #3 on: May 17, 2018, 09:14:20 am »
Can you inspect/compare the projects and see if you can find the thing that causes the problem?
Can you trim your project and post it?
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Offline gd_on

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Re: wxSmith Couldn't Add New Handler
« Reply #4 on: May 17, 2018, 01:50:14 pm »
I had such a problem on Windows 7, and for me, if I remember well, it was solved by changing the character encoding of sources files to UTF8 and/or making paths to my files containing only standard ascii characters. The problem was apparently caused by accentuated characters (as we have in french).
gd_on
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Windows 11 64 bits (25H2), svn C::B (last version or almost!), wxWidgets 3.3.1, Msys2 Compilers 15.2.0, 64 bits (seh, posix : gcc, g++ and gfortran in C:\msys64\mingw64) or 32 bits (dwarf2, posix  in C:\msys64\mingw32).

Offline oBFusCATed

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Re: wxSmith Couldn't Add New Handler
« Reply #5 on: May 17, 2018, 06:37:28 pm »
gd_on: Can you try to reproduce this problem?
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Offline Lowkus

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Re: wxSmith Couldn't Add New Handler
« Reply #6 on: May 18, 2018, 06:19:09 am »
I copied the wxs code from the failing project to the good project, it still works in the good project, so the problem can't be in the wxs code.  I'll keep looking for the problem.

Update: Something is telling wxSmith where to find the event code, whatever chunk of code is providing that linkage is the cause of the problem as far as I can tell.  I don't have time to debug it anymore, I'm just going to copy my code to the new project and hook up the form event connections from scratch.
« Last Edit: May 18, 2018, 08:23:23 am by Lowkus »
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Offline gd_on

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Re: wxSmith Couldn't Add New Handler
« Reply #7 on: May 18, 2018, 09:35:22 am »
Sorry, I have not been able to reproduce the problem. :(
I am sure that accentuated character in path is sometimes a problem : for example, if codeblocks source path contains such character, as for example my firstname "Gérard", compilation fails on many "assert" instructions (but this has nothing to do with wxSmith !). No problem, if my path contains "Gerard", so replacing the "é" by a "e".
As said before, I had the same problem a few month ago ("Couldn't Add New Handler"), but apparently not caused by accentuated characters in the path ! Strange : I was almost sure the problem was here ! Sorry.  :-[
gd_on
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Windows 11 64 bits (25H2), svn C::B (last version or almost!), wxWidgets 3.3.1, Msys2 Compilers 15.2.0, 64 bits (seh, posix : gcc, g++ and gfortran in C:\msys64\mingw64) or 32 bits (dwarf2, posix  in C:\msys64\mingw32).

Offline oBFusCATed

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Re: wxSmith Couldn't Add New Handler
« Reply #8 on: May 18, 2018, 01:03:11 pm »
Quote from: Lowkus on May 18, 2018, 06:19:09 am
I copied the wxs code from the failing project to the good project, it still works in the good project, so the problem can't be in the wxs code.  I'll keep looking for the problem.

Update: Something is telling wxSmith where to find the event code, whatever chunk of code is providing that linkage is the cause of the problem as far as I can tell.  I don't have time to debug it anymore, I'm just going to copy my code to the new project and hook up the form event connections from scratch.

Have you used a diff tool to compare the two project files? I think all information for wxSmith is stored in the cbp file.
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Offline Lowkus

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Re: wxSmith Couldn't Add New Handler
« Reply #9 on: May 19, 2018, 08:04:20 am »
I just eyeballed the two files, but there wasn't more than a few lines to compare.  I've gotten the new project working and the old one is in the trash now, if I run into the problem again I might return to the search for the cause.  Somebody who really understands how wxSmith works will probably know how to fix the problem.
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Offline bezet

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Re: wxSmith Couldn't Add New Handler
« Reply #10 on: March 27, 2026, 02:06:56 pm »
Hello, I confirm that the same problem persists in March 2026 :
After adding a child window/frame using the wxSmith menu 'New Frame', I was unable to create/add any events.
Also components added to this frame return the same error "Couldn't Add New Handler" .
I looked at thevarious files to find any wrong path etc., without success.
Then I created another child frame in the same way, and there is no problem to create events!?
« Last Edit: March 27, 2026, 03:20:30 pm by bezet »
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Offline ollydbg

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Re: wxSmith Couldn't Add New Handler
« Reply #11 on: March 27, 2026, 04:19:53 pm »
Can you show us a step by step instructions? We need to reproduce this bug in our C::B. Unluckily, I don't know the steps.
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Offline Miguel Gimenez

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Re: wxSmith Couldn't Add New Handler
« Reply #12 on: March 27, 2026, 07:41:07 pm »
There are only two possible causes of this error:
- There is no // (*Handlers(FrameName) section in the dialog's include file
- An editor for the source file cannot be opened

See wxsEventsEditor::CreateNewFunction() for more information.

In the wxSmith menu there is a submenu (Configure wxSmith for current project) that may help

I would bet for an invalid file name.
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Offline bezet

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Re: wxSmith Couldn't Add New Handler
« Reply #13 on: Yesterday at 10:16:46 am »
Hi, thanks to both for your replies. I'm afraid I can't reproduce the error !?

1) Here is what I did:
- create new Project -> wxWidgets project
(then I added a few components to the main Frame1)
- add a second frame using menu wxSmith -> Add wxFrame
-> second Frame2 which is a child of the first
(I added a few components to Frame2, among them a MathPlot which gives some heartache)
...then I noticed that Frame2 is destroyed when I close it, but I only want to hide it, so it can be reopened
-> I tried to create an event OnClose (using the Component Properties/Events window) , in order to overwrite with a 'simple' Hide()
...but this results in the error "cannot create event", same for components inside Frame2,
but everything is fine for Frame1,
and for a third frame which I created same way as Frame2 !
 
2) reproducing the error:
I have deleted the misbehaving Frame2,
but I found and reinstalled an old version of my program (saved 10 days ago), with Frame2 and Mathplot in it: the problem has disappeared !?

3) submenu "Configure wxSmith for current project"
nothing special inside, I made no changes:
- "automatically loaded ressources" is empty,
- Main resource = Frame1,
- "callwxXmlResource" is ticked
- "'only when necessary' is ticked

Thanks again, and in advance, for any hints!
« Last Edit: Yesterday at 10:26:57 am by bezet »
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