Where to find open-source widgets for Qt library? [closed] - c++

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I have found quite good stuff here. If you know other sites that have some good code for Qt library (some additional codes, good examples, except the Qt standard examples, of course), please share with us.

Also please look at Qt Solutions

For plotting and technical purpose, there are Qwt and QtiPlot. There may be others, but often a self-made widget is faster, smaller, and better than what someone could find on the net (except qwt and qtiplot of course).
If you're looking to extend Qt a bit more, look into KDE. It is also (experimentally) available on Windows. It adds quite a bit of functionality, but also a lot of dependencies.

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quickJS documentation and/or well commented projects [closed]

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I am porting an in-house system from Duktape to quickJS to take advantage of the support for ES6 features and good module support (including dynamic imports).
Have ported some simple class libraries to be imported as shared object modules. But getting stumped with more advanced inter-operation issues. quickjs.h contains approximately 400 entries, but there are less than 2 pages of documentation for the C-API.
Any suggestions as to where more detailed documentation could be found?
Failing that pointers to any well documented project using quickJS might help. Yes, I have Googled and haven't found anything useful.
I am also in the same boat,QuickJS docs & examples are hard to find here are the best ones I found so far :
https://github.com/sntg-p/QuickJS-raylib : very nice as it wraps a good portion of the relatively large RayLib API
https://github.com/saghul/txiki.js might also have some nice things (as it wraps libuv amomngs other things
a more simple example https://github.com/calbertts/async-quickjs
hope the above examples help !

How to create gui in C++ [closed]

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I'm new in C++ and looking for a way to create gui just like windowbuilder under eclipse (java).
I will appreciate if someone can help me to find tool like windowbuilder.
OS : Linux
Thank you
Personally I'm a fan of Qt.
However, it depends entirely on what you want to do. Qt is primarily for cross platform development, so it'll look and act mostly the same between any platform, it also has a large library that may require a bit of a learning curve at first - but the licencing options make it look pretty. Also the documentation is very awesome.
There are of course a lot of other options like:
GTKmm (based on GTK+), wxWidgets, FLTK, etc...
Also this is a duplicate question, so look at some of these other answers:
How do I create a GUI for a windows application using C++?
How do I build a GUI in C++?

Again on build systems. Let's talk about complete correctness [closed]

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Recently I tried tup and I am VERY impressed by its correctness and speed, and the fact that monitoring the file system makes the tool really robust. It is also very easy to understand.
It never gets anything wrong, and when it does, it will show me. I would like to find a tool that is more mainstream and cross-platform friendly as long as it meets the requirements below.
My questions are:
Do you know any alternative build tool that has:
O(1) rebuilds.
Completely correct dependency tracking.
(Optional) Takes advantage of filesystem access.
EDIT: This is not a subjective "recommend me a tool" question, it is give me names of tools that meet these requirements because I would like to further research on how they behave for my use cases.

Library for software mixing of sound (wave) streams [closed]

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I would like to mix several sound (wave) streams into one.
Each stream might have a different format (bits/sample, channel count, etc.), so conversion is needed also.
I am looking for a library to do this, which I can link into my VS C++ project, before jumping in and implementing my own.
If you just want a library you can use the SOX library. It is pretty good and easy to use.
If you want more control over how the mixing is done, and maybe have more than 2 files to mix, you should take a look at the STK library
It is very simple yet quite powerful. The following is an example of how you can use a single line of code to mix two waves (simple superpositioning of the signals)
output.tick( input1.tick()*0.5+ input2.tick()*0.5 );
Hope this helps.
FMOD is quite good.

Open Source C++ Data Visualization Library [closed]

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We want to include data visualization in our desktop GUI (mostly timelines and graphs; clickable, draggable). We want to restrict to open-source, non-copyleft C++ libraries that allow commercial use and are portable across many platforms. Which library can I use? Our GUI is based on WxWidgets.
there is VTK.
And if data visualization is your thing, have a look at opendx too.
I think this question would be easier to answer if you also stated which other GUI components you use. Perhaps that limits the choice of available libraries. Since you're C++ and cross-platform, maybe wxWindows? Would be good not to have to guess.