openlimits | Rust high performance cryptocurrency trading API | Cryptocurrency library
kandi X-RAY | openlimits Summary
kandi X-RAY | openlimits Summary
A open source Rust high performance cryptocurrency trading API with support for multiple exchanges and language wrappers. Focused in safety, correctness and speed.
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QUESTION
I have a application that works with FXML files. Each time i want to load in another FXML file, i get a new instance of my Controller class. But i dont want that. How can i prevent this?
For instance: I just logged in on my login.fxml file and now the login.fxml file needs to close and the manageBanks.fxml file needs to show. What i programmed is that it looks at the current AnchorPane that is not NULL and gets the window from that pane, so i can close that stage. Then i load in the new .fxml file in my controller. But every time i load in a new .fxml file, the application creates a new instance of the controller. But i have an instance of my Client class in the Controller class (that is set in the constructor), and i dont want that instance to be renewed each time. I just want one instance of my Client class that the controller can speak to.
Here is my Controller class. At the bottom of this class are my methods to initialize the new stages:
...ANSWER
Answered 2017-Dec-20 at 19:15Every time you load an FXML file, you get new instances of the UI elements defined in the FXML file. For example, your FXML file apparently has a large collection of elements; for each of those
elements you get a new
TextField
instance created each time you load the FXML.
Since the controller typically has references to the UI elements defined in the FXML file, and/or has event handlers specific to those elements, a controller instance is specific to the instance of a UI loaded from a specific call to FXMLLoader.load()
.
As a consequence, it really makes no sense at all to share a single controller instance among multiple UIs loaded from multiple calls to FXMLLoader.load()
. You should have a different controller instance for each, which is the default behavior.
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Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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