I am working through an example in the book, "Getting Started with Qt Quick", and the example code has a MainForm.ui.qml with the following import:
import com.qmlqb.qmlcomponents 1.0
When I try to run, I receive this error:
qrc:/MainForm.ui.qml:4 module "com.qmlqb.qmlcomponents" is not installed
What is this import? How can I install it?
So I learned what was going on. I was attempting to access a C++ class within Qt, and it was registered with the following statement in main.cpp:
qmlRegisterType ("Com.qmlqb.qmlcomponents",1,0,"MyClass");
The documentation on qmlRegisterType specifies that the first argument is the name for the library in which the type will be imported.
So, I then tried to import that library in MainForm.ui.qml, with the following import statement, which threw an error:
import com.qmlqb.qmlcomponents 1.0
As you can see, the capitalization is different between the two. After fixing that, everything was fine :)
Related
I want to learn Qt especially for the 3D functionalities and therefore was following this tutorial.
One part of the tutorial is displaying the mesh from a .dae file called object.dae.
When I tried to run my code for the first time, I got the following error:
2:25:52: Starting /home/qt/build-Qt3DTests-Desktop_Qt_5_15_2_GCC_64bit-Debug/Qt3DTests ...
Qt3D.Renderer.SceneLoaders: Qt3DCore::QEntity* Qt3DRender::Render::LoadSceneJob::tryLoadScene(Qt3DRender::QSceneLoader::Status&, const QStringList&, const std::function<void(Qt3DRender::QSceneImporter*)>&) Found no suitable importer plugin for QUrl("file:../Qt3DTests/Models/object1.dae")
22:26:00: /home/qt/build-Qt3DTests-Desktop_Qt_5_15_2_GCC_64bit-Debug/Qt3DTests exited with code 0
I proceeded to clone the repo (tag: STEP_001) and try running it but again I receive the same error.
As this was the first Qt tutorial and C++ code I ever did, I am unsure what could be the problem. Does anybody know what is going wrong? Am I missing some module in my installation or something?
The cause might be this (rare) bug in Qt:
https://bugreports.qt.io/browse/QTBUG-89045
I am new to Pact.
I downloaded the code from Github, "pact-jvm" project.
I created a new project in IntelliJ from "existing source" with Gradle setting.
It imported all the packages fine.
However, when I tried running some of the tests in it, I got a
cannot find symbol
error as the following,
Error:(5, 30) java: cannot find symbol
symbol: class PactFragment
location: package au.com.dius.pact.model
I looked at my package 'package au.com.dius.pact.model' and I found that "PactFragment" is missing from this package.
In addition to that, the following classes are also missing in this package.
import au.com.dius.pact.matchers.MatchingConfig
import au.com.dius.pact.model.BodyMismatch
import au.com.dius.pact.model.BodyTypeMismatch
import au.com.dius.pact.model.DiffConfig
import au.com.dius.pact.model.HeaderMismatch
import au.com.dius.pact.model.ResponseMatching$
import au.com.dius.pact.model.ResponsePartMismatch
import au.com.dius.pact.model.StatusMismatch
However, I did a "git pull" on all the source code from Github for the "pact-jvm" project. When I do "git pull", it shows that everything is "Already up-to-date."
Any pointers what I might be missing?
Why am I missing so many classes in this package, 'package au.com.dius.pact.model'?
Thanks,
Eric
After re-importing the project from scratch as a Gradle project and install the scala plugin. The problem is solved.
I have a local spark 1.5.2 (hadoop 2.4) installation on Windows as explained here.
I'm trying to import a jar file that I created in Java using maven (the jar is jmatrw that I uploaded on here on github). Note the jar does not include a spark program and it has no dependencies to spark. I tried the following steps, but no one seems to work in my installation:
I copied the library in "E:/installprogram/spark-1.5.2-bin-hadoop2.4/lib/jmatrw-v0.1-beta.jar"
Edit spark-env.sh and add SPARK_CLASSPATH="E:/installprogram/spark-1.5.2-bin-hadoop2.4/lib/jmatrw-v0.1-beta.jar"
In a command window I run > spark-shell --jars "E:/installprogram/spark-1.5.2-bin-hadoop2.4/lib/jmatrw-v0.1-beta.jar", but it says "Warning: skip remote jar"
In the spark shell I tried to do scala> sc.addJar("E:/installprogram/spark-1.5.2-bin-hadoop2.4/lib/jmatrw-v0.1-beta.jar"), it says "INFO: added jar ... with timestamp"
When I type scala> import it.prz.jmatrw.JMATData, spark-shell replies with error: not found: value it.
I spent lot of time searching on Stackoverflow and on Google, indeed a similar Stakoverflow question is here, but I'm still not able to import my custom jar.
Thanks
There are two settings in 1.5.2 to reference an external jar. You can add it for the driver or for the executor(s).
I'm doing this by adding settings to the spark-defaults.conf, but you can set these at spark-shell or in SparkConf.
spark.driver.extraClassPath /path/to/jar/*
spark.executor.extraClassPath /path/to/jar/*
I don't see anything really wrong with the way you are doing it, but you could try the conf approach above, or setting these using SparkConf
val conf = new SparkConf()
conf.set("spark.driver.extraClassPath", "/path/to/jar/*")
val sc = new SparkContext(conf)
In general, I haven't enjoyed working with Spark on Windows. Try to get onto Unix/Linux.
I'm trying to integrate R into Scala using JVMR. I am getting a NoSuchMethodError when attempting to instantiate RInScala.
I'm working on a Windows 7 machine with R installed under C:\Program Files\R\R-3.1.1 and Scala version 2.11.1 is installed under C:\Program Files (x86)\scala. I'm developing in IntelliJ with the Scala plugin and am using the Scala worksheet just to test this out as a POC. My Scala project does show JVMR 2.11-2.11.1.1.jar as an included library. The worksheet is very basic at present - just the import and the instantiation attempt.
import org.ddahl.jvmr.RInScala
val R = RInScala()
When running the worksheet in IntelliJ, I see the following output, so I can tell that it's successfully importing the class, but can't instantiate.
import org.ddahl.jvmr.RInScala
java.lang.NoSuchMethodError: scala.runtime.ObjectRef.create(Ljava/lang/Object;)Lscala/runtime/ObjectRef;
at org.ddahl.jvmr.RInScala$.findROnWindows(RInScalaTest.sc2318647708135405919.tmp:804)
at org.ddahl.jvmr.RInScala$.defaultExecutable$lzycompute(RInScalaTest.sc2318647708135405919.tmp:822)
at org.ddahl.jvmr.RInScala$.defaultExecutable(RInScalaTest.sc2318647708135405919.tmp:821)
at org.ddahl.jvmr.RInScala.<init>(RInScalaTest.sc2318647708135405919.tmp:28)
at org.ddahl.jvmr.RInScala$.apply(RInScalaTest.sc2318647708135405919.tmp:838)
at com.xxxx.r_in_scala.A$A1$A$A1.R$lzycompute(RInScalaTest.sc2318647708135405919.tmp:2)
at com.xxxx.r_in_scala.A$A1$A$A1.R(RInScalaTest.sc2318647708135405919.tmp:2)
at com.xxxx.r_in_scala.A$A1$A$A1.get$$instance$$R(RInScalaTest.sc2318647708135405919.tmp:2)
at #worksheet#.#worksheet#(RInScalaTest.sc2318647708135405919.tmp:10)
I've drilled into the code for findROnWindows and my installation should be found based on the values of the registry keys that are being read. I'm sure I'm missing something simple, but am at that "I've been looking at the problem for too long without figuring it out and just need a new set of eyes" stage.
To my knowledge this is currently some kind of bug in the worksheet implementation by IntelliJ or indeed a misconfiguration. To verify:
Put your code in an object
package starter
object Test extends App {
import org.ddahl.jvmr.RInScala
val R = RInScala()
println("works")
}
and try to run it as a scala app and not from the worksheet.
I am working on making some changes to the android framework layer and building my own version. I am working based on froyo and trying to use monkeyrunner for some testing. I have pulled the source and can build and run in the emulator but when I try to use a monkeyrunner script I can't seem to get anyhting to work. I built the code using lunch full-eng and it runs fine on the device. I am just trying to get a simple script running based on the example at http://developer.android.com/guide/developing/tools/monkeyrunner_concepts.html shown below with a print statement added just to see if I could get anything to run.
/# Imports the monkeyrunner modules used by this program
from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice
/# Connects to the current device, returning a MonkeyDevice object
device = MonkeyRunner.waitForConnection()
print "Hello World!"
When the following line is in the script I get an error as follows.
from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice
Traceback (most recent call last):
File "../../MRTesting/MyTest.py, line 4, in
from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice
ImportError: cannot import name MonkeyDevice
So if I remove MonkeyDevice from the import as shown below I get a different error on the call to waitForConnection()
from com.android.monkeyrunner import MonkeyRunner
Traceback (most recent call last):
File "../../MRTesting/MyTest.py, line 6, in
device = MonkeyRunner.waitForConnection()
AttributeError: type object 'com.android.monkeyrunner.MonkeyRunner' has no attribute 'waitForConnection'
I tried modifying the call to have some arguments as indicated in the documentation as follows but I still get the same error. The second argument matches the value returned by a call to adb devices.
device = MonkeyRunner.waitForConnection(5, 'emulator-5554')
I have done some digging around and one person said that the shebang needs to be at the beginning of the file as follows with the path modified to avoid putting information in I would rather not share.
/#! /home/<path>/monkeyrunner
I could not see how this would be any different than me invoking monkeyrunner directly from the command line but I tried it and no luck. I did not install the sdk anywhere on my system as it is included in the build tree but it seems to me that the monkeyrunner tool might not be able to locate it as needed but I can't find any indication of how to fix this. I am running the following commands when I build my system from within my build directory at the root.
. build/envsetup.sh
setpaths
lunch full-eng
make -j16
Anyone have any thoughts on this?