C++ & Qt

19 May 2024 11:40

Qt Graphical Effects is deprecated in Qt6 and available as part of QtCompat module. Alrenatives are Qt MultiEffects and Shapes.

C++ & Qt

18 May 2024 20:42

It's hard to explain but I'm just trying to mirror but the source is in a different window...actually different screen 😅

C++ & Qt

18 May 2024 20:28

Any chance there's a workaround for this error?
ShaderEffectSource: sourceItem and ShaderEffectSource must both be children of the same window
I already have a good plan and my code makes sense but this is a deal breaker and bug report said they won't fix it 😭

C++ & Qt

18 May 2024 16:13

This is what I'm trying to achieve

C++ & Qt

18 May 2024 16:11

Hey I was trying to implement a circular progress bar and tried something but it's not working as intended

C++ & Qt

18 May 2024 14:12

What you’ve mentioned are correct but yet there’s a little and subtle point remaining.

C++ & Qt

18 May 2024 11:53

a is not const and q neither. q can point to another double.

C++ & Qt

18 May 2024 11:26

If you need the same type on the left, use const auto explicitly or maybe decltype

C++ & Qt

18 May 2024 11:22

I did not understand the question then

C++ & Qt

18 May 2024 11:18

auto j = i; // j is not const, even when i is const

C++ & Qt

18 May 2024 11:10

Kind of a challenge.

Why does auto behave differently in deducing const for j?

C++ & Qt

17 May 2024 20:33

Hi, I need someone who can make a Tetris application in Qt

C++ & Qt

17 May 2024 16:46

Any channel for learning c++

C++ & Qt

17 May 2024 06:11

It tends to be one of those nasty things that works 99 times out of 100 though

C++ & Qt

17 May 2024 06:07

Complete expected data may come in multiple segments when you are using raw sockets. For http api calls, the network stack takes care of it to receive the complete data and then the comlete response is notified to the client.

C++ & Qt

19 May 2024 11:30

Try not to use Canvas in QML if you care about your application's performance.
https://doc.qt.io/qt-6/qml-qtquick-shapes-conicalgradient.html

C++ & Qt

18 May 2024 20:33

What are you trying to do (that can’t be done)?

C++ & Qt

18 May 2024 16:19

Here is a html canvas version:

https://stackoverflow.com/questions/14193956/draw-arc-with-linear-gradient-in-html5-canvas

C++ & Qt

18 May 2024 16:12

I tried adding a gradient so that when the progress is at 0 it's black and when it reaches 100 its in cyan, I used linear gradient and it's not working as I intended it to

C++ & Qt

18 May 2024 14:14

a is S<const int> but not const S<const int>. It doesn't deduce anything there. The template was instantiated with const int, so it's const int.

q is const double * but not const double * const. It's a pointer to a constant object, but not a constant pointer.

C++ & Qt

18 May 2024 14:09

auto in a can deduce that the type is S<const int> not S<int>, likewise in q, it can deduce the type is const double* and not double*

C++ & Qt

18 May 2024 11:43

auto has been used for a and q with const deduced correctly without need to use const auto.

C++ & Qt

18 May 2024 11:25

I guess what Sébastien means is that you aren't wondering why

int i = 42;

C++ & Qt

18 May 2024 11:20

That’s like what has been written in the code above.

C++ & Qt

18 May 2024 11:16

int j = 42; // 42 is const (event constexpr) but j is not const

C++ & Qt

18 May 2024 11:09

template <typename T>
struct S {};

int main() {
S<const int> s;
s = S<const int>{}; // OK
auto a = s;// type of a is S<const int>

const int i{};
auto j = i; // type of j is int

const double *pd {new double(3.4)};
auto q = pd; // type of q
is const double*

// …
}

C++ & Qt

17 May 2024 19:32

https://youtu.be/nscgFv4l53w

C++ & Qt

17 May 2024 06:13

Perhaps you need to send lots of packets rapidly somewhere and then suddenly the stream gets segmented

C++ & Qt

17 May 2024 06:08

However, for data size of 27 bytes, which is very small will mostly be responded in the first segment.

C++ & Qt

17 May 2024 02:13

Hello everyone, I work as a backend developer in a startup and I am glad to join the community!