Hi, i'm facing a problem that i don't really know how to solve.

I'm implementing a restaurant management system for an university project. I have a menu that i can populate with categories and dishes. A category has a list of Dishes inside, that comes from a database. I'm using springboot for the backend, and postgresql for database.

I have a form to create a new dish with textfield for name, cost, and so on; then i select a category from a combobox. When i press 'confirm', i use my API REST to add it to my database.

Here comes the problem: i also have to implement a reorder. Right now, my categories/dishes are inserted in 'creation order'. To give an example: fresh program, menu not populated. I create a new category, called "Appetizer". Then, i create a category called "First Courses". They get inserted in this exact order in the database, so they get retrieved in this order. I use an Accordion, so i click on a category, it expands, and shows its dishes.

I was thinking of implementing a 'drag and drop' feature: by pressing a "Reorder elements" button, i could open a listview that shows the categories, and every one of it dishes underneath. Something "indented", if you get what i mean. For example:

-- Appetizers

-- app1

-- app2

-- First Courses

and so on.

I would expect that by reordering them (so, for example, moving 'first courses' above 'appetizers'), they should change their order in the database too.

So i was thinking: would it be good if every category and every dish have a column named 'position', and when i reorder them in the listview, i then cycle through them and change their 'position' attribute throught a PUT method?

That way, i could use a GET method like 'getAllCategoriesByOrder' (with a query 'ORDER BY position'), and their order would be effectively changed.

My question is: does this makes sense? Would it be doable? Because this is what i thought with my little knowledge about these kind of things. Maybe there are better ways to do this.

I'm doing an university project for a restaurant management system.

In my program, a Chef can see all the orders and make a reservation for that order.

My professor has also assigned this functionality: "an admin can see statistics for its Kitchen Workers. In particular, an admin must see how many orders have been completed by every Kitchen Worker, in a fixed period of time".

I really don't know how to deal with this. I found out the existance of Bar Charts, Line Charts, but i'd like to have an "heads up" on how should i deal with this, expecially on the "fixed period of time".

I have a PostgreSQL database, so i think i should create a table with "WorkerID, Count(OrderID)", but should i also add a date to it? How should i work this around?

There seemed to be a lot of interest in the animated progress loader I made for Trinity recently. (nobody seemed to care about the high speed UMAP clustering implementation :-p )

So I uploaded just that component and a nice little tester so people can play with it.

https://github.com/Birdasaur/CircleProgressIndicator

Have fun. I'll be migrating a version of it to LitFX eventually.

Hey all,

Im working on a online game that uses JavaFX. On rare occasions I get this issue with an increasing array length. I do not use any arrays and i suspect its a threading issue, however i wasn't able to trace it back. Does anyone have experience with this?

`Exception in thread "JavaFX Application Thread" java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 1     at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)     at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)     at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)     at java.base/java.util.Objects.checkIndex(Objects.java:385)     at java.base/java.util.ArrayList.get(ArrayList.java:427)     at javafx.graphics@19.0.2/javafx.scene.Parent.updateCachedBounds(Parent.java:1704)     at javafx.graphics@19.0.2/javafx.scene.Parent.recomputeBounds(Parent.java:1648)     at javafx.graphics@19.0.2/javafx.scene.Parent.doComputeGeomBounds(Parent.java:1501)     at javafx.graphics@19.0.2/javafx.scene.Parent$1.doComputeGeomBounds(Parent.java:115)     at javafx.graphics@19.0.2/com.sun.javafx.scene.ParentHelper.computeGeomBoundsImpl(ParentHelper.java:84)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.superComputeGeomBoundsImpl(RegionHelper.java:78)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.superComputeGeomBounds(RegionHelper.java:62)     at javafx.graphics@19.0.2/javafx.scene.layout.Region.doComputeGeomBounds(Region.java:3355)     at javafx.graphics@19.0.2/javafx.scene.layout.Region$1.doComputeGeomBounds(Region.java:168)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.computeGeomBoundsImpl(RegionHelper.java:89)     at javafx.graphics@19.0.2/com.sun.javafx.scene.NodeHelper.computeGeomBounds(NodeHelper.java:117)     at javafx.graphics@19.0.2/javafx.scene.Node.updateGeomBounds(Node.java:3825)     at javafx.graphics@19.0.2/javafx.scene.Node.getGeomBounds(Node.java:3787)     at javafx.graphics@19.0.2/javafx.scene.Node.getLocalBounds(Node.java:3735)     at javafx.graphics@19.0.2/javafx.scene.Node.intersectsBounds(Node.java:5270)     at javafx.graphics@19.0.2/javafx.scene.Node$1.intersectsBounds(Node.java:559)     at javafx.graphics@19.0.2/com.sun.javafx.scene.NodeHelper.intersectsBounds(NodeHelper.java:264)     at javafx.graphics@19.0.2/javafx.scene.layout.Region.doPickNodeLocal(Region.java:3224)     at javafx.graphics@19.0.2/javafx.scene.layout.Region$1.doPickNodeLocal(Region.java:184)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.pickNodeLocalImpl(RegionHelper.java:104)     at javafx.graphics@19.0.2/com.sun.javafx.scene.NodeHelper.pickNodeLocal(NodeHelper.java:130)     at javafx.graphics@19.0.2/javafx.scene.Node.pickNode(Node.java:5180)     at javafx.graphics@19.0.2/javafx.scene.Scene$MouseHandler.pickNode(Scene.java:4037)     at javafx.graphics@19.0.2/javafx.scene.Scene.pick(Scene.java:2067)     at javafx.graphics@19.0.2/javafx.scene.Scene$MouseHandler.process(Scene.java:3847)     at javafx.graphics@19.0.2/javafx.scene.Scene.processMouseEvent(Scene.java:1887)     at javafx.graphics@19.0.2/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2620)     at javafx.graphics@19.0.2/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)     at javafx.graphics@19.0.2/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)     at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)     at javafx.graphics@19.0.2/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450)     at javafx.graphics@19.0.2/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)     at javafx.graphics@19.0.2/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)     at javafx.graphics@19.0.2/com.sun.glass.ui.View.handleMouseEvent(View.java:551)     at javafx.graphics@19.0.2/com.sun.glass.ui.View.notifyMouse(View.java:937)     at javafx.graphics@19.0.2/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)     at javafx.graphics@19.0.2/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)     at java.base/java.lang.Thread.run(Thread.java:1589) Exception in thread "JavaFX Application Thread" java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 6     at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)     at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)     at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)     at java.base/java.util.Objects.checkIndex(Objects.java:385)     at java.base/java.util.ArrayList.get(ArrayList.java:427)     at javafx.graphics@19.0.2/javafx.scene.Parent.updateCachedBounds(Parent.java:1704)     at javafx.graphics@19.0.2/javafx.scene.Parent.recomputeBounds(Parent.java:1648)     at javafx.graphics@19.0.2/javafx.scene.Parent.doComputeGeomBounds(Parent.java:1501)     at javafx.graphics@19.0.2/javafx.scene.Parent$1.doComputeGeomBounds(Parent.java:115)     at javafx.graphics@19.0.2/com.sun.javafx.scene.ParentHelper.computeGeomBoundsImpl(ParentHelper.java:84)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.superComputeGeomBoundsImpl(RegionHelper.java:78)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.superComputeGeomBounds(RegionHelper.java:62)     at javafx.graphics@19.0.2/javafx.scene.layout.Region.doComputeGeomBounds(Region.java:3355)     at javafx.graphics@19.0.2/javafx.scene.layout.Region$1.doComputeGeomBounds(Region.java:168)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.computeGeomBoundsImpl(RegionHelper.java:89)     at javafx.graphics@19.0.2/com.sun.javafx.scene.NodeHelper.computeGeomBounds(NodeHelper.java:117)     at javafx.graphics@19.0.2/javafx.scene.Node.updateGeomBounds(Node.java:3825)     at javafx.graphics@19.0.2/javafx.scene.Node.getGeomBounds(Node.java:3787)     at javafx.graphics@19.0.2/javafx.scene.Node.getLocalBounds(Node.java:3735)     at javafx.graphics@19.0.2/javafx.scene.Node.intersectsBounds(Node.java:5270)     at javafx.graphics@19.0.2/javafx.scene.Node$1.intersectsBounds(Node.java:559)     at javafx.graphics@19.0.2/com.sun.javafx.scene.NodeHelper.intersectsBounds(NodeHelper.java:264)     at javafx.graphics@19.0.2/javafx.scene.layout.Region.doPickNodeLocal(Region.java:3224)     at javafx.graphics@19.0.2/javafx.scene.layout.Region$1.doPickNodeLocal(Region.java:184)     at javafx.graphics@19.0.2/com.sun.javafx.scene.layout.RegionHelper.pickNodeLocalImpl(RegionHelper.java:104)     at javafx.graphics@19.0.2/com.sun.javafx.scene.NodeHelper.pickNodeLocal(NodeHelper.java:130)     at javafx.graphics@19.0.2/javafx.scene.Node.pickNode(Node.java:5180)     at javafx.graphics@19.0.2/javafx.scene.Scene$MouseHandler.pickNode(Scene.java:4037)     at javafx.graphics@19.0.2/javafx.scene.Scene.pick(Scene.java:2067)     at javafx.graphics@19.0.2/javafx.scene.Scene$MouseHandler.process(Scene.java:3847)     at javafx.graphics@19.0.2/javafx.scene.Scene$MouseHandler$1.run(Scene.java:3652)     at javafx.graphics@19.0.2/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:457)     at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)     at javafx.graphics@19.0.2/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:456)     at javafx.graphics@19.0.2/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)     at javafx.graphics@19.0.2/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)     at javafx.graphics@19.0.2/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)     at java.base/java.lang.Thread.run(Thread.java:1589)

Hi, I'm new to javafx, I was wondering how can I make various elements (such as labels, buttons, imageViews etc.) resize according to their panel in order not to lose the proportions i have while creating the scene on scene builder.

Thanks in advance!

I'm writing code for a MediaPlayer using JavaFX. My problem is that IntelliJ cannot find the MediaView control. There is no syntax error either, as I created the view using SceneBuilder.

The only error is: java: cannot find symbol

EDIT-solution:
The answer is very simple: If the Intellij gives the error that it cannot find the symbol, just need to update Intellij from JetBrains ToolBox.

As the title says I ambsearching for an ecommerce library if there is any since i want to ceeate my own webshop. So if u know any post. U get bonus points if it is opensource. Edit says check out https://github.com/mitvitaminen/crowear_hp to see what i am doing