General and Desktop

A GStreamer pipeline is basically a list of module that you chain to each other from the source to the sink to, for example, read an audio file, decode it and finally send it to your audio output. From a command line point of view, it's the elements built from the parameters you give to gst-launch. For example: Play the mp3 music file "music.mp3" using a libmad-based plugin and output to an OSS device: gst-launch-1.0 filesrc location=music.mp3 ! mad ! audioconvert ! audioresample ! osssink The documentation of get-launch gives you more good examples. The API tutorials are pretty nice to get started.

I've found what I was missing: checking out to a matching branch for the 3rdparty repo. Now I can compile it without any trouble using webengine v5.10.

@aha_1980 Thanks I will!

@sayan275 said in QGraphicsRectItem moves out of the scene: But why this event is not responding, when we update the position of the rectItem by keyPress events? what event? Do you mean QGraphicsItem::itemChange()? This change notifier is called in all cases whenever the position changes - it doesn't matter how it is changed. But it might be that you are not changing the position of the item directly? What i am talking about is, maybe you are just updating the rect's position (top-left corner) and let the item itself always on the position (0,0)? But long story short, show the code you are using to change the position of your rect item.

@SGaist My solution is heavily inspired by: this old ogre wiki post (should have linked it as well, forgot about it until now). I mostly slimmed it down to what I posted as my solution, but I agree if I have time I'll try to make an example/entry. There are some things that need to be updated from the linked post to fit Ogre 2.1 since the post is old.

I reported a bug for this QTBUG-72816.

@ravi2k18 make sure to delete all build artifacts and Makefiles. it should work.

@Pada_ I would say to keep same ratio you need to do: x = ratio * y (because ratio = x / y) So, if you want to increase the height by 4 pixels and ratio is 1.5 (3/2) then you need to increase x by 1.5 * 4 = 6 For example: A = 30 B = 20 ratio = 3/2 = 1.5 y = 4 => x = 1.5 * 4 = 6 Anew = 36 Bnew = 24 36 / 24 = 1.5

@AaronKelsey One note: if the only application using this C++ wrapper is the one you're currently developing, then you can simply make this wrapper part of your application project (so, no shared library).

@ravi2k18 said in unable to compile existing github project in qt: this project has multiple .pro and .pro.user files recursively under each dir The .pro.user files will probably cause errors on your machine. Delete them before you load the project. does it mean to build and run this open source github project I need to purchase full Visual Studio 2013 and install that? As others have suggested, ask the project maintainer if the project is compatible with other compilers. If it turns out that you must use MSVC 2013, you can get Visual Studio 2013 Express for free at https://visualstudio.microsoft.com/vs/older-downloads/ (but I believe you need to register an account) what is the point naming -msvc2013_64-5.5.0.exe here? The point is to inform the user that this library is compatible with MSVC 2013 64-bit. Therefore, the user cannot use this library with MSVC 2013 32-bit, MSVC 2015 64-bit, MinGW (GCC), and others. I am new to Qt and only worked on Linux environment so far. It's the same principle in Linux. If you want to use the wxWidgets library or gtkmm library, you still need to install the g++ compiler separately from the library. Qt is a C++ library (mostly), like wxWidgets and gtkmm.

Thanks to all!!

Hi, What you wrote is not really clear. Can you explain more precisely what is happening and what you want to do ?

@anarelle Hi if issue is resolved, please mark the post Solved.

@JohnGa You could use a QDockWidget and a QTextEdit to display Output / Debug Text, Application Msg or want ever you want. Here is an example

To add to @jsulm, it's pretty usual to have that macro at the bottom of the header where the class/struct is defined.

That's what I thought ;) Very good idea. Maybe I get some inspiration from this if the source code is not too heavy

@user4592357 You use the captured sender directly in the lambda.

@SGaist I will look into it. This seems much easier and more intuitive than removing and adding things. Thank you

@aha_1980 I did add something, it is really weird that just today others have put comments... Thanks!

So changing the target to mgreenish helped me find my mistake. Indeed, the compiled plugin was not being put where I though. However, I did delete the SineDrawer_debug.dylib from the plugins directory where I wanted it to go several times and upon recompiling, it would reappear. Of course, it could have been my cloud server playing tricks on me and putting the file back rather than QT Designer. Thanks to both for your help !