I have a PySide/Phonon app (developed for and working flawlessly on Windows) that I need to "port" to Mac OSX - where I have no development experience whatsoever.
The app works as expected if I just run the Python file - the problems arise when I try to package it (which I need to do) with py2app.
If I leave the resulting .app as is, Phonon doesn't work, because it fails to load the required phonon_backend ; if I add the plugin path to qt.conf, as various sources suggest, Phonon seems to load (that is, I don't get the corresponding error message anymore), but I start getting the "so-and-so library is loaded twice, one will be used, which one is undefined" error, and the app crashes right away.
Finally, if I try to use the macdeploy_qt tool, I receive a message to the effect of "no external framework" and the results are functionally equivalent to what I get without using the tool, except there are a few more plugins in the relevant directory.
Any ideas/pointers/tutorials/etc? I'm using PySide1.1.1 for Qt4.7, by the way, and Python.org python binaries (otherwise py2app can't even start to build a standalone app, it seems).
I suggest you do it like in this tutorial.
Then you just have to add the following line somewhere at the top of your main module:
QApplication.setLibraryPaths([os.path.join(os.environ['_MEIPASS2'], 'qt4_plugins'), os.environ['_MEIPASS2'] ])
For PyInstaller >1.5 the following code should be used instead:
QApplication.setLibraryPaths([os.path.join(sys._MEIPASS, 'qt4_plugins'), sys._MEIPASS])
Related
I have an app that I started using the out of the box MAUI project template. I have been running it on both a local Android emulator and a remote Mac emulator. It had been working on both, and then today after running it on Android for a while, I changed the debugger to use the Mac emulator. It immediately refused to compile, and listed every Android class reference as "type or namespace [blah] could not be found". After playing with several things, I found that if I commented out the "using Java.Net" on the default MainPage.xaml.cs, all of the compiler errors went away. If I uncomment it again, then all 20 something compiler errors show up again. This is the out of the box MainPage.xaml that came with the project template, plus one click event handler that I added - is there some known issue here?
As I said, it was working fine for nearly two weeks, and then just went bananas on me today. Haven't added any nuget packages or anything like that - just been writing code.
Thanks.
You've described the issue in your question:
using "Java.Net" on the default MainPage.xaml.cs.
That won't compile for any platform except Android.
It doesn't exist on the default MainPage.xaml.cs (which you could have verified by creating a new project).
My recommendation: Start over with a fresh project. Add again whatever you added, and see if that using appears again. If it does, you've added something Android specific. Which doesn't make sense, on a cross-platform page.
If using does appear again, and you don't understand why, then add to your question the exact code which, when added to page, causes using Java.net; to appear.
If you were following some example, also add a link to the example web page.
UPDATE
I have a theory about how that using got there:
I bet you added a reference to some class which exists in Java.net namespace.
So Visual Studio gave you an option to add a "using".
If that happens again, and a "using" mentions Android or Java, DON'T add the using, UNLESS you are in a file inside your project's Platforms/Android folder.
Some class names exist both in an Android or Java namespace, and in a .Net or Maui namespace. In cross-platform code, pick the cross-platform using, not the platform-specific one. If they are in different namespaces, they are different classes - even if the names are the same.
EDIT: Getting negatives for such a detailed and HONEST question? Sometimes I don't really get Stack Overflow. Really.
Hi, I'm trying to create a PoC using Swift 5 (Xcode 10.2.1) and a modern rendition of ncurses (in this case, MacPorts' one, some 6.1.2018XXXX version)
My Poc has no code as of now, as my problems start before being able to add any sensible line to my .swift files.
So far I've done the following things:
1.- I have a proper working MacPorts ncurses library installed: that means "sudo port install htop" can build "htop" application without any problem, proving that way that my ncurses library is correctly installed (.h files seem to be deployed inside /opt/local/include/ directory)
2.- I create an empty CONSOLE APPLICATION swift program (using Xcode 10.2.1 own wizard). It just takes 4 mouse clicks, and you get some "Hello world" silly main.swift file.
3.- I create a bridging header to import my .h files (in this case ncurses.h).
The contents of this bridging header will/should be something like this:
#import "/opt/local/include/ncurses.h"
4.- I compile and run the silly empty "hello world" swift program, and I get tons of somewhat "expected" errors. Something like:
"Darwin/SDK curses.h symbol xxxxxxxxx is also defined inside your /opt/local/ncurses.h file. Bailing out." (it's not the literal error I get, you just get the idea)
So my question is:
Can I disable/remove Darwin/internal/MacOs SDK curses.h from my XCode project definition somewhere, in order my bridging header only sees one copy of my 2 (n)curses.h file (that should be my macports one)?
I've tried many things described in this other thread, but with no luck: How to disable "curses.h" header (a part of "stdio.h in Xcode 6.3 OSX Yosemite) to avoid conflicting function declarations
Specially "Enable Modules" option, which no matter the value you set it to, seems to do nothing.
BTW: I know when I might solve this .h headers issue, I will probably need to add some additional -lib linking option in the "build phase"(?) tab inside Xcode, but I'll try to manage myself when that moment arrives.
As of now my concern is "I wan't to remove Apple Internal Macos SDK curses support/files from my Xcode project". Is it achievable?
PS: I'm using Mojave 10.4.4 with no problem
I'm having the same issues, although trying to use ncurses via the Swift Package Manager. Despite being actively trying to find a solution I've been unsuccessful so far. Check my question just in case: Swift package manager unable to compile ncurses installed through Homebrew
This answer should give you all the information you need to get it working :) https://stackoverflow.com/a/56728436/554972
I'm trying to run a simple example of OpenCV on Eclipse [which was perfectly buit and installed before (using CMake and MinGw), even libraries and all includes are in place !].
When building, I'm getting no errors or warning, all seems good, but when I try to run, I get a message as if the project had no Binaries, even if all binaries are there. I even specified the path to the ".exe" (run->run conf-> new launch-> browse ...etc.).
You can notice on the images attached that the project is built and the binaries are generated.
Notice: when I run an example of a (Hellow world) on the console ... it displays the messag without errors.
I read a lot on Internet before posting here, but I found nothing that matches to this case.
Thank you so much,
Error Capture
Build Capture
Regards
I'm looking at using Tesseract to do some work with PDF files, and so I want to use the library rather than an external executable.
I started by downloading the full Tesseract source and looking at building that. Sadly the standard sources don't have any means to build on a non-Linux platform, in my case Windows. There are methods for doing so, and I looked at those.
Firstly the VS2008 build doesn't. I'm aware that it need Leptonica, but I figured I'd tackle that afterwards and just tried to build the existing code. Fails with "fatal error C1083: Cannot open include file: 'allheaders.h': No such file or directory". Nothing to do with Leptonica at this stage, it simply doesn't work.
Even if I were able to get past that, I'd have to build Leptonica, and that requires using GNU tools and therefore an installation of Cygwin, so I gave up. I Have a MingW instatllation, (I've never managed to get Cygwin to work in a usable fashion) but I'm not keen enough to mess with such a complicated and fragile build.
So I decided I'd just use the pre-built binaries which some kind soul creates. Downloaded that from code.google.com. Now I need to look into using the code, so the next obvious step is the Tesseract API example, which states it requires "tesseract-ocr-3.02.02-win32-lib-include-dirs.zip", no problem, because I already have that now.
No real clue as to where the API example wants the files to be placed, but a little messing about gets them in appropriate locations. Press build and "fatal error C1083: Cannot open include file: 'allheaders.h': No such file or directory", just like trying to build Tesseract from source.....
And indeed there is no such file.
So, where is this file ?
I also struggled some time ago to make it works under windows and then I found this git repository : https://github.com/charlesw/tesseract-vs2012
It includes all needed extern library (because Tesseract need Leptonica, but Leptonica also need extern library to handle the different image format) and is also working great with vs 2013.
OK so now I see that allheaders.h is part of Leptonica. Still leaves me wondering why the Tesseract pre-built library requires that I have Leptonica available, I would have expected that to be built-in, I guess it isn't.
Java problems
I am a student of Java. I managed to write about 15 Java programs so far and get them working on the PC. But I have not yet written a init() method like my latest assignment requires in order to initialize some instance variables. The compiler tells me that my init() method is attempting to override the final init() method in the acm.program. Isn’t that what an init() method is supposed to do? After exhausting all avenues on PC for the last week, I thought maybe it is an Eclipse problem on the PC. All the example code in the Java documentation shows little Mac windows. So I thought I would try moving my code to a Mac running Lion OS 10.7.2.
Switching to MAC environment.
The Mac claims to have Java installed but I think it’s just the run time environment, not a development environment. All I could find for applications is the Java VisualVM, which I assume is the virtual machine so there is no java development software. So… I downloaded Eclipse for Mac from Stanford’s website and got Eclipse IDE for Java Developers Version: Helios Service Release 2 and tried to run a simple program which included an import statement.
The import acm.program.*; statement is giving the compiler a problem: "acm cannot be resolved”. After researching this I think the problem is I have not downloaded the acm.jar archive and added that to my build path. Why this isn’t already done for me, as part of Eclipse I have no clue. I guess everything has to be difficult.
So I downloaded the acm.jar archive and it’s sitting in my download folder. I tried double clicking it and thankfully the mac won’t execute it. I tried dragging it into my source folder in Eclipse and then adding it to the build path. Once in the build path, Eclipse tells me the jar is missing. So I removed it from the build path and instead from inside Eclipse went to Properties/Java Build Path/Libraries/add External JARS… and navigated to my downloads folder where the acm.jar folder is to select the JAR. However, Eclipse seems to be looking for a .jar;.zip file, which there are none because my Mac helpfully already unzipped the folder. So I changed the open window to look for all files (.) and now I see individual .java files that are too numerous to add to the build path individually.
So back to the PC and download the acm.jar zip file and copy it over to the Mac in unzipped form and again add it to the build path as a zip file. This resolved the compiler error and my simple program executed on the Mac!
Next I will try my program with the init() method to see if that now works. Nope. Same problem on the Mac. This init method causes the following error: Multiple markers at this line
overrides acm.program.Program.init
Cannot override the final method from
Program
public void init() {
canvas = new HangmanCanvas();
add(canvas);
}
Does it have to be this hard or am I missing something?
Generally Macs have the whole JDK installed. Eclipse is nice, though.
This "acm" package isn't installed because it's not any kind of standard thing; this is like asking why your refrigerator doesn't come with asparagus already in it.
That last dialog was the right one; you need the original jar file. Try again, right-click and "Save As..." the link to save the file from your browser.
See 3. I find it particularly funny that anybody would use a Windows computer to make up for shortcomings of a Mac; in reality the Mac is infinitely more flexible and more powerful.
If you got a message that complains you're trying to override a final method, then you are indeed trying to do something wrong; final actually means "You're not allowed to override this." Perhaps you didn't fully understand the instructions for the assignment.
It gets better, I promise. Just be sure to use each of these annoyances as a learning experience.
There is no reasons why Java for the Mac would be any better than Java for the PC. The language and tools should work the same ... assuming that you are using the same versions of the language and similar versions of the tools.
Your problem with init is nothing to do with PCs versus Macs. So don't waste your time switching platforms to try to fix it. You need to figure out what the
On the face of is, the compiler / IDE is telling you the truth. Java won't let you override a final method. In fact the whole point of declaring a method to be final is to prevent overloading.
However, this does not make sense. According to the documentation I found here, the acm.program.Program.init() method is designed to be overridden. So why won't it let you?
I suspect that the cause of your problems is that you've downloaded or been given a copy of the JAR file that someone has messed around with. Someone has changes the method to be final (for some reason best kown to themselves), compiled it and put it up for people to download. Google is not always your friend ...
So, what I suggest you do is review all of the handouts and the files that were provided to find either the copy of the JAR that is provided, or the instructions on WHERE to download it from. Then replace the copy of the JAR you are currently using with the recommended one.
Why this isn’t already done for me, as part of Eclipse I have no clue. I guess everything has to be difficult.
How is Eclipse supposed to know what this "acm" stuff is? Which version you require? Where to download it from?