Hi!
I run into a problem with
QFileDialog::getOpenFileContent function, which are use to access to the
local filesystem with emscripten:
https://doc.qt.io/qt-5/qfiledialog.html#getOpenFileContent
I tried to call it on a different thread then what on the wasm application
is running:
std::thread th1 (QFileDialog::getOpenFileContent, "*.*", onFileReady);
th1.join();
But in that case, it froze at the emscripten part in the openFileDialog
function and no file dialogue was opened.
emscripten::val document = emscripten::val::global("document");
emscripten::val input = document.call<emscripten::val>("createElement",
std::string("input"));
*I got the error message at creating the input value.*
*https://codereview.qt-project.org/c/qt/qtbase/+/250461/7/src/gui/platform/wasm/qwasmlocalfileaccess.cpp#129*
<https://codereview.qt-project.org/c/qt/qtbase/+/250461/7/src/gui/platform/wasm/qwasmlocalfileaccess.cpp#129>
Running on the main thread there is no error and works fine.
Any idea what could be the problem/solution here?
I got this error message:
worker.js onmessage() captured an uncaught exception: TypeError: Cannot
read properties of undefined (reading 'createElement')
self.onmessage @ soffice.worker.js:207
soffice.worker.js:208 TypeError: Cannot read properties of undefined
(reading 'createElement')
at methodCaller_emscripten$$val_$std$$string$ (eval at new_
(47933e67-c694-46fe-af70-91dc8b50859c:8694:27), <anonymous>:5:20)
at __emval_call_method (47933e67-c694-46fe-af70-91dc8b50859c:9267:14)
at emscripten::internal::MethodCaller<emscripten::val,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> > >::call(emscripten::internal::_EM_VAL*, char
const*, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char>
emscripten::internal::MethodCaller<emscripten::val,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> > >::call(emscripten::internal::_EM_VAL*, char
const*, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >&&) (val.h:278)
at emscripten::val emscripten::val::call<emscripten::val,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> > >(char const*, std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> >&&) emscripten::val
emscripten::val::call<emscripten::val, std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > >(char const*,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >&&) const (val.h:498)
at QWasmLocalFileAccess::openFileDialog(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void
(qstdweb::FileList const&)>
QWasmLocalFileAccess::openFileDialog(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void
(qstdweb::FileList const&)> const&) (qwasmlocalfileaccess.cpp:131)
at QWasmLocalFileAccess::openFiles(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void (int)>
const&, std::__2::function<char* (unsigned long long,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()>
QWasmLocalFileAccess::openFiles(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void (int)>
const&, std::__2::function<char* (unsigned long long,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()> const&)
(qwasmlocalfileaccess.cpp:156)
at QWasmLocalFileAccess::openFile(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
std::__2::function<void (bool)> const&, std::__2::function<char* (unsigned
long long, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()>
QWasmLocalFileAccess::openFile(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
std::__2::function<void (bool)> const&, std::__2::function<char* (unsigned
long long, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()> const&)
(qwasmlocalfileaccess.cpp:169)
at QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
QFileDialog::getOpenFileContent(QString const&, std::__2::function<void
(QString const&, QByteArray const&)> const&)::$_2::operator()()
(qfiledialog.cpp:2444)
at decltype(std::__2::forward<QFileDialog::getOpenFileContent(QString
const&, std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(fp)())
std::__2::__invoke<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
decltype(std::__2::forward<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(fp)())
std::__2::__invoke<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)> const&)::$_2&)
(type_traits:3694)
at void std::__2::__invoke_void_return_wrapper<void,
true>::__call<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)> void
std::__2::__invoke_void_return_wrapper<void,
true>::__call<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)> const&)::$_2&)
(__functional_base:348)worker.js onmessage() captured an uncaught
exception: TypeError: Cannot read properties of undefined (reading
'createElement')
self.onmessage @ soffice.worker.js:207
soffice.worker.js:208 TypeError: Cannot read properties of undefined
(reading 'createElement')
at methodCaller_emscripten$$val_$std$$string$ (eval at new_
(47933e67-c694-46fe-af70-91dc8b50859c:8694:27), <anonymous>:5:20)
at __emval_call_method (47933e67-c694-46fe-af70-91dc8b50859c:9267:14)
at emscripten::internal::MethodCaller<emscripten::val,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> > >::call(emscripten::internal::_EM_VAL*, char
const*, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char>
emscripten::internal::MethodCaller<emscripten::val,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> > >::call(emscripten::internal::_EM_VAL*, char
const*, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >&&) (val.h:278)
at emscripten::val emscripten::val::call<emscripten::val,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> > >(char const*, std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> >&&) emscripten::val
emscripten::val::call<emscripten::val, std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > >(char const*,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >&&) const (val.h:498)
at QWasmLocalFileAccess::openFileDialog(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void
(qstdweb::FileList const&)>
QWasmLocalFileAccess::openFileDialog(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void
(qstdweb::FileList const&)> const&) (qwasmlocalfileaccess.cpp:131)
at QWasmLocalFileAccess::openFiles(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void (int)>
const&, std::__2::function<char* (unsigned long long,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()>
QWasmLocalFileAccess::openFiles(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
QWasmLocalFileAccess::FileSelectMode, std::__2::function<void (int)>
const&, std::__2::function<char* (unsigned long long,
std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()> const&)
(qwasmlocalfileaccess.cpp:156)
at QWasmLocalFileAccess::openFile(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
std::__2::function<void (bool)> const&, std::__2::function<char* (unsigned
long long, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()>
QWasmLocalFileAccess::openFile(std::__2::basic_string<char,
std::__2::char_traits<char>, std::__2::allocator<char> > const&,
std::__2::function<void (bool)> const&, std::__2::function<char* (unsigned
long long, std::__2::basic_string<char, std::__2::char_traits<char>,
std::__2::allocator<char> >)> const&, std::__2::function<void ()> const&)
(qwasmlocalfileaccess.cpp:169)
at QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
QFileDialog::getOpenFileContent(QString const&, std::__2::function<void
(QString const&, QByteArray const&)> const&)::$_2::operator()()
(qfiledialog.cpp:2444)
at decltype(std::__2::forward<QFileDialog::getOpenFileContent(QString
const&, std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(fp)())
std::__2::__invoke<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
decltype(std::__2::forward<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(fp)())
std::__2::__invoke<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)> const&)::$_2&)
(type_traits:3694)
at void std::__2::__invoke_void_return_wrapper<void,
true>::__call<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)> void
std::__2::__invoke_void_return_wrapper<void,
true>::__call<QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)>
const&)::$_2&>(QFileDialog::getOpenFileContent(QString const&,
std::__2::function<void (QString const&, QByteArray const&)> const&)::$_2&)
(__functional_base:348)
Thanks in advance,
Balazs
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