Visual Studio 2022 uses Cascadia Mono font by default:
They probably think that we all are infected by something and need to be vaccinated.
(more…)Author Archives: dmitriano
Waitable QTimer with C++20 coroutines
Found an example of overriding co_await operator and was able to implement my own version:
#include <QTimer>
#include <QMetaObject>
#include <chrono>
#include <coroutine>
//QTimer accepts only milliseconds.
class TimeAwaitable
{
public:
explicit TimeAwaitable(std::chrono::milliseconds d) : m_d(d) {}
~TimeAwaitable()
{
if (m_connection)
{
QObject::disconnect(m_connection);
}
}
bool await_ready() const noexcept
{
return m_d <= std::chrono::milliseconds(0);
}
void await_suspend(std::coroutine_handle<> h) noexcept
{
m_connection = QObject::connect(&m_timer, &QTimer::timeout,
[this, h]()
{
QObject::disconnect(m_connection);
h.resume();
});
m_timer.setSingleShot(true);
m_timer.start(m_d);
}
void await_resume() const noexcept {}
private:
std::chrono::milliseconds m_d;
QTimer m_timer;
QMetaObject::Connection m_connection;
};
inline TimeAwaitable operator co_await(std::chrono::milliseconds d) noexcept
{
return TimeAwaitable{ d };
}
For those who did not work with QT, QTimer::singleShot simply calls the lambda on the current thread after a given interval.
Ethereum Classic (ETC) stopped mining on GeForce GTX 3GB cards
Today I noticed that ETC does not mine anymore on my HiveOS farm with GeForce GTX 3GB cards:
Binance looses its orders
When I query KAVAUSDT order #561657676 with /api/v3/order?symbol=KAVAUSDT&orderId=561657676×tamp={{timestamp}}&signature={{signature}} that normally should return
{
"symbol": "KAVAUSDT",
"orderId": 561657676,
"orderListId": -1,
"clientOrderId": "ce86e0a9-85a8-4d9b-99b1-b08e227e2464",
"price": "4.80700000",
"origQty": "10.00000000",
"executedQty": "0.00000000",
"cummulativeQuoteQty": "0.00000000",
"status": "CANCELED",
"timeInForce": "GTC",
"type": "LIMIT",
"side": "BUY",
"stopPrice": "0.00000000",
"icebergQty": "0.00000000",
"time": 1632183933417,
"updateTime": 1632184233620,
"isWorking": true,
"origQuoteOrderQty": "0.00000000"
}
I periodically get
{
"code": -2013,
"msg": "Order does not exist."
}
see a video on YouTube that demonstrates this effect.
(more…)An example of real-time TableView in QML
Looks like CheckBox-es respond to clicks and work correctly even if they are in a TableView that is updated once a second:
How I fixed “No such file” error in Visual Studio Code on Windows 10
Found an answer on stackoverflow.com:
and updated c:\Users\D-Ef\.vscode\extensions\liximomo.sftp-1.12.9\node_modules\ssh2-streams\lib\sftp.js on my machine:
// For backwards compat do not emit close on destroy.
options.emitClose = false;
options.autoDestroy = false;
Building QT 6.2.2 for iOS
I built QT 6.2.2. for MacOS first and then configured QT 6.2.2 for iOS as follows:
./configure -c++std c++20 -opensource -confirm-license -no-openssl -securetransport -DQT_NO_EXCEPTIONS=1 \
-platform macx-ios-clang -release -qt-host-path /usr/local/Qt-6.2.2 -prefix /usr/local/Qt-6.2.2-ios \
-skip qt3d -skip qt5compat -skip qtactiveqt -skip qtcharts -skip qtcoap -skip qtconnectivity \
-skip qtdatavis3d -skip qtdoc -skip qtlottie -skip qtmqtt -skip qtnetworkauth -skip qtopcua \
-skip qtserialport -skip qtpositioning -skip qtquicktimeline -skip qtquick3d -skip qtremoteobjects \
-skip qtscxml -skip qtsensors -skip qtserialbus -skip qtvirtualkeyboard -skip qtwayland \
-skip qtwebchannel -skip qtwebengine -skip qtwebview
Building QT 6.2.2 for MacOS – Part 2
In my previous post I described my first attempt to built QT 6.2.2 for MacOS. Probably my mistake was that I did not switch to full XCode with the command:
sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
and that I used the configuration script with a wrong syntax and missed -- in the command line. Probably the following configuration can be a step to a right direction:
./configure -c++std c++20 -opensource -confirm-license -no-openssl -securetransport -DQT_NO_EXCEPTIONS=1 \
-skip qt3d -skip qt5compat -skip qtactiveqt -skip qtcharts -skip qtcoap -skip qtconnectivity \
-skip qtdatavis3d -skip qtdoc -skip qtlottie -skip qtmqtt -skip qtnetworkauth -skip qtopcua \
-skip qtserialport -skip qtpositioning -skip qtquicktimeline -skip qtquick3d -skip qtremoteobjects \
-skip qtscxml -skip qtsensors -skip qtserialbus -skip qtvirtualkeyboard -skip qtwayland \
-skip qtwebchannel -skip qtwebengine -skip qtwebview \
-- -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64"
