I recently did a short tongue-in-cheek blog post about Qt and modern C++. In the comments, people discovered that several compilers effectively can optimize std::make_unique<>().release() to a simple new statement, which was kind of a surprise to me. I have…
Category: qt
Modern C++ and Qt
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layout->addWidget(std::make_unique<QLabel>().release()); |
– ’cause raw new’s are bad.
Aubergine – Playing with emoji
Playing with emojis At some point, I needed to copy paste emojis, but couldn’t find a good way to do it. So what does a good hacker do? Scratch an own itch. As I wrote about in the past, all…
KDE still makes Qt
A couple of years ago, I made a blog post, KDE makes Qt, with data about which percentage of Qt contributions came from people starting in KDE. Basically, how many Qt contributions are made by people who used KDE as…
Leaky lambdas and self referencing shared pointers
After a bit of a debugging session, I ended up looking at some code in a large project
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m_foo = std::make_shared<SomeQObject>(); /* plenty of lines and function boundaries left out */ (void)connect(m_foo.get(), &SomeQObject::someSignal, [m_foo]() { /* */ }); |
The connection gets removed when the pointer inside m_foo gets de-allocated by the shared_ptr. But the connection target is a lambda…
Let Qt models meet std::vector<std::tuple<…>>
The problem So. I was stuck with a container of tuples that I wanted to see in a Qt view (QTableView, QtQuick ListView or similar). So how to do that? Another problem: I haven’t been doing fun things with templates…
R is for Randa
This week I have been gathered with 38 KDE people in Randa, Switzerland. Randa is a place in a valley in the middle of the Alps close to various peaks like Matterhorn. It has been a week of intense hacking,…
Compilers and error messages
So. I typo’ed up some template code the other day. And once again I learned the importance of using several c++ compilers. Here is a very reduced version of my code:
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#include <utility> template <typename T> auto foo(const T& t) -> decltype(x.first) { return t.first; } int main() { foo(std::make_pair(1,2)); return 0; } |
And let’s start with the compiler I was…
KDE at Qt World Summit
So. KDE has landed at Qt World Summit. You can come and visit our booth and … hear about our amazing Free Qt Addons (KDE Frameworks) stories about our development tools meet some of our developers Talk about KDE in…
Getting a Q_INVOKABLE C++ function reevaluated by QML engine
Unfortunately, with all the normal magic of QML property bindings, getting a property updated in a setup that involves return values from functions isn’t really doable, like this:
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Text { text: qtobject.calculatedValue() } |
I’m told there is a low priority feature request for a…
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