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To: | "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com> |
Subject: | RE: [EXT] Re: XWin copy/paste succeeds on Windows 7, crashes on |
Windows 11 Enterprise. | |
Thread-Topic: | [EXT] Re: XWin copy/paste succeeds on Windows 7, crashes on |
Windows 11 Enterprise. | |
Thread-Index: | AdoOkZldZkaI/m/oSRiHM2QwVvHrlwAwP1KAAGK0UJAAC8zygAAKLbIA//+0CACAAEugYP//Lyyw//zsZ1D/7RMzgA== |
Date: | Thu, 16 Nov 2023 18:21:38 +0000 |
Message-ID: | <5c374b0c81c54137b616908f7c74e8cb@ida.org> |
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From: | "Stone, Timothy M via Cygwin" <cygwin AT cygwin DOT com> |
Reply-To: | "Stone, Timothy M" <tstone AT ida DOT org> |
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I've finally figured out what was happening here. The issue was not related to Cygwin. For those interested: I compile my app using libraries from Exceed, then later use Cygwin as my X Server. I had (2) problems here: (1) I was using the wrong version of the Exceed DLLs at runtime. (2) There appears to be a bug in Exceed 15 where if you set the environment variable "UserDir", it causes the cut/paste functionality to not work. There was a previous bug where NOT setting this variable caused other issues. thanks for all your help! From: Stone, Timothy M Sent: Wednesday, November 8, 2023 10:24 AM To: 'cygwin AT cygwin DOT com' <cygwin AT cygwin DOT com> Subject: RE: [EXT] Re: XWin copy/paste succeeds on Windows 7, crashes on Windows 11 Enterprise. I have made an important discovery here. I've been using "release" mode when compiling, and had the following results: On Windows 11 enterprise (release): When using "translations_ignore", it correctly just prints "Ignoring" every time I cut/copy/paste. When using "translations_copypaste", the program crashes. On Windows 7 professional (release): When using "translations_ignore", it correctly just prints "Ignoring" every time I cut/copy/paste. When using "translations_copypaste", it correctly cuts/copies/pastes. I have now compiled and run the program in "debug" mode and have noticed an important difference. Instead of crashing on Windows 11 when trying to copy/paste, the program prints an error message and actually exits. The error message is: "Error: Error - registered format name must be nonnull" Does anyone know where this error message is coming from? I am starting to suspect that Windows clipboard integration routines have changed since Windows 7 and are not being used correctly internally. I see there are some functions (which I presume are used internally) that sound a lot like this error message. "RegisterClipboardFormat()" and "GetClipboardFormatName()", for instance. Hopefully this new information can help the experts help me determine why my program is working on Windows 7 and crashing on Windows 11. thanks! From: Stone, Timothy M Sent: Tuesday, November 7, 2023 12:21 PM To: cygwin AT cygwin DOT com Subject: RE: [EXT] Re: XWin copy/paste succeeds on Windows 7, crashes on Windows 11 Enterprise. I have created an entire program to test this. It's only 40 lines. The program pops up a type in window...then you can type something in it and test the copy/paste. On Windows 11 enterprise: When using "translations_ignore", it correctly just prints "Ignoring" every time I cut/copy/paste. When using "translations_copypaste", the program crashes. On Windows 7 professional: When using "translations_ignore", it correctly just prints "Ignoring" every time I cut/copy/paste. When using "translations_copypaste", it correctly cuts/copies/pastes. Of course, you'll need to link with X/Motif libraries, and possibly change the one line to point at your XKeysymDB, but this 40 line program shows the whole problem: #include <stdio.h> #include <stdlib.h> #include <Xm/RowColumn.h> #include <Xm/TextF.h> void ignore_cut_paste(Widget widget, XEvent *event, String *args, int *num_args) { printf("Ignoring\n"); } int main(int argc, char **argv) { Widget W,thewin,rowcol,textarea; XtAppContext app_context; XtActionsRec actions2; _putenv("display=127.0.0.1:0.0"); _putenv("xkeysymdb=.\\XKeysymDB"); W = XtAppInitialize(&app_context, (String)"Test",NULL,(Cardinal)0,&argc,argv,NULL,NULL,(Cardinal)0); actions2.string = "ignore_cut_paste"; actions2.proc = (XtActionProc)ignore_cut_paste; XtAppAddActions (app_context, &actions2, 1); String translations_copypaste = "#override\n Ctrl<Key>v: paste-clipboard()\n Ctrl<Key>c: copy-clipboard()\n Ctrl<Key>x: cut-clipboard()"; String translations_ignore = "#override\n Ctrl<Key>v: ignore_cut_paste()\n Ctrl<Key>c: ignore_cut_paste()\n Ctrl<Key>x: ignore_cut_paste()"; thewin = XtCreatePopupShell("Test", topLevelShellWidgetClass,W,NULL,0); rowcol = XtVaCreateWidget ("rowcol",xmRowColumnWidgetClass, thewin, NULL); textarea = XtVaCreateManagedWidget ("test_area", xmTextFieldWidgetClass, rowcol, XmNmaxLength, 80, XmNtranslations, XtParseTranslationTable ( translations_copypaste ) , NULL); XtManageChild(textarea); XtManageChild (rowcol); XtPopup(thewin,XtGrabNone); XtAppMainLoop(app_context); } -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
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