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Charles Holley
and want to switch to another font if the language of the application is changed to let's say Chinese. Instead of exchanging the style class definition for every single of my UI controls, it would be so easy if I could just define the font string via css variable:
as stylesheet to my application. Unfortunately, only css variables for numbers and colors seem to be supported by JavaFX so far. Does anyone have a good concept / workaround for this kind of font handling? I would really appreciate every single hint...!
My question is: why should the speed of gluons by given by the electric and magnetic constants $\mu_0$ and $\varepsilon_0$? This connection seems sensible in the case of the photon, an electromagnetic particle, but why should this apply to the gluon as well?
If "speed of information" is the answer, we need both to supply a sensible fundamental definition of "information" and furthermore show that photons and gluons actually satisfy that definition. Then we still have the problem in the bullet point above.
Can anyone shed some light (ha ha) on this? How can we present these results such that the speed of the gluon is naturally given by electronic and magnetic constants, or how do we derive $\mu_0$ and $\varepsilon_0$ from some common concept?
"Although in the normal phase of QCD single gluons may not travel freely, it is predicted that there exist hadrons that are formed entirely of gluons - called glueballs. There are also conjectures about other exotic hadrons in which real gluons (as opposed to virtual ones found in ordinary hadrons) would be primary constituents. "
A proton is not full of quarks and gluons ready to spill out like beans from a bag. Take a look at proton-antiproton annihilation. What you get is things like pions, which soon decay to things like muons, then electrons and neutrinos, and photons. We don't see gluons, we see photons. Keep that thought in mind:
I understand that the speed of light can be derived from Maxwell's equations, giving $c=\frac1\sqrt\mu_0\varepsilon_0$. I furthermore understand how the principle of invariance of laws w.r.t. inertial reference frames gives rise to special relativity in order to preserve the above equation.
To investigate gluons' contribution to spin, scientists compared the number of direct photons emitted from two different types of longitudinally polarized proton-proton collisions: Ones where the proton spins were pointing in opposite directions (in this case, at each other, top) and ones where the two proton spins were pointing in the same direction, colliding head to tail (bottom). More direct photons emerged from the collisions of oppositely aligned protons, revealing that gluons' spins are indeed aligned in the same direction as the proton they are in.
Direct photons (γ) are emitted when a quark in one proton interacts with a gluon in the other proton. By comparing the number of direct photons emitted in collisions where proton spins are pointing in opposite directions (as shown) with the number emitted when one proton spin is flipped so both are pointing in the same direction, scientists can determine whether gluon spins are aligned with or against the proton spin direction.
Alexander Bazilevsky (Brookhaven Lab) and Abhay Deshpande (Brookhaven Lab and Stony Brook University), two of the co-authors on the PHENIX analysis of direct photons used to assess gluons' contribution to proton spin.
The final contribution to proton spin is likely the orbital motion of quarks and gluons within these composite particles. Those details are inaccessible in collisions of longitudinally polarized protons.
After hours of testing I still fail to run my JavaFX project as native app (.exe on Windows). I use JavaFX 11.0.2. I don't get any error when executing mvn clean gluonfx:build. The errors come with mvn gluonfx:nativerun:
My list of classes in my project's pom is getting lengthy as I continue developing views and features, but I prefer addressing each such issue once in the pom than repeatedly running gluonfx:runagent and manually stepping through my app's UI.
When you perform a search in the Explore workspace view, you can directly execute the following operations from the search results instead of going to the item in the workspace window. Just right-click any of the highlighted files (you can select more than one) and then select the required operation:
Gluon provides an easy and modern approach for developing Java Client applications.These applications can run on the JVM or can be converted to a platform specific native-images which have lighting fast startup and takes a fraction of space.Moreover, applications can also be targeted to Android, iOS, and embedded apart from all the desktop environments.
After you have created the project or downloaded an existing one, in order to include your license, you need to add a file called gluonmobile.license to your resources and paste your valid license key as the content:
GluonFX plugin provides us various goals which are explained in detail earlier in the documentation.For this tutorial, we will be using the gluonfx:build goal to create a native image of the application.
Execute mvn -Pandroid gluonfx:package to create an apk. Once the goal is executed successfully, connect a physical device andinstall the native image by executing the mvn -Pandroid gluonfx:install goal.
GluonFX plugin provides us various goals which are explained in details, earlier in the documentation.For this tutorial, we will be using the gluonfx:build goal to create a native image of the application.
Run mvn -Pandroid gluonfx:build from the terminal, or alternatively, execute the gluonfx:build goal again, this time the android profile should be selected by default, else add it to the profiles field.
For every class that is defined in jniList or reflectionList, it is included in the configuration filestarget/gluonfx/$arch-$os/gvm/jniconfig-$arch-$os.json and target/gluonfx/$arch-$os/gvm/reflectionconfig-$arch-$os.json respectively,with a definition like the following:
A new goal gluonfx:run can be used to run the application on JVM/hotspot. It simplifies resolution of Attach libraries for Desktop. For more information, check the issue: Simplify resolution of Attach artifacts on JVM
If you have Intel, download the graalvm-svm-java17-darwin-gluon-22.1.0.1-Final.zip file, unzip and extract to a proper location, and finally set the GRAALVM_HOME environment variable to point to the GraalVM directory:
If you have an M1, Download the graalvm-svm-java17-darwin-m1-gluon-22.1.0.1-Final.zip file, unzip and extract to a proper location, and finally set the GRAALVM_HOME environment variable to point to the GraalVM directory:
Run mvn -Pandroid gluonfx:package to generate an Android Application Package (APK) that can be installed on any Android device, and also the Android Application Bundle (AAB) that can be submitted to Google Play.
Finally, you can call mvn -Pandroid gluonfx:nativerun to launch the application on the device.GluonFX plugin will also start adb logcat to print out debugging information from the device to the console.
Finally, run mvn -Pandroid gluonfx:package to bundle the application into an Android APK that can be installed on a device and also to an Android App Bundle (AAB) that can be submitted to Google Play.
By default, during the link goal, a pair of blank storyboards are generated in target/gluonfx/arm64-ios/gensrc/ios/assets/Base.lproj. Once the app is launched, these will be used briefly before the JavaFX stage is shown, preventing a black screen.
Using this Github workflow, you can checkout, build, and upload the native binary to TestFlight. The steps are described in code comments and more details information can be found in the next sections.
This code states to use -text-dark or -text-light, depending on the darkness of the first value, in this case -primary-swatch-500. The result of this is that when -primary-swatch-500 is a very light color (such as a bright yellow), the -fx-text-fill will be -text-light (and therefore appear as a dark color). When -primary-swatch-500 is a very dark color, -text-dark is used, and is therefore a light color that is readable on a dark background.
There exists a class called GlistenStyleClasses that is located in the com.gluonhq.glisten.visual package. This class provides a number of predefined style classes that can be applied to a control, via one of two methods:
Only in case you need to make any change, copy this file to src/android and make any modification that might be needed. For every new run of gluonfx:package, the manifest found at src/android will be used.
Alternatively, you can copy target/gluonfx/arm64-ios/gensrc/ios/Default-Info.plist into src/ios and make any modification that might be needed. For every new run of gluonfx:link, the plist found at src/ios will be used.
and when targeting Android, extract the Android libraries (.aar) into target/gluonfx/$arch-$os/gvm/android_project/libs. These libraries can be added as regular dependencies for the Android project when creating the apk/aab bundles in the gluonfx:package goal.
The File provider enables reading from and writing to a file that is located on the file system of the device. You canfind the complete sample from our gluon-samples repository on GitHub: -samples. Insidethe repository, look for the folder named gluon-connect-file-provider.
The REST provider enables reading from and writing to an HTTP URL resource. For demonstrating this we will make use ofthe public StackExchange API. You can find the complete sample from our gluon-samplesrepository on GitHub: -samples. Inside the repository, look for the folder namedgluon-connect-rest-provider.
The following sample will use the three concepts by providing a DataSource that reads from a classpath resource,a Converter that converts JSON into objects and a DataProvider that combines the DataSource with the Converter to getaccess to GluonObservable objects. The complete sample for this can be found in our gluon-samples repository on GitHub: -samples. Inside the repository, look for the folder named gluon-connect-basic-usage.
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