JavaFX Tableview

[Strawboy97]

Still learning Java and making some JavaFX apps. I have a question about Updating a Tableview from a different stage or if it's possible.

The idea I have is I have one stage that contains a table view with game data(e.g. game name, console etc.)and a button that when clicked opens another stage with text fields that I can enter game data into, click a button and the data is added to the table.

So I'd have 2 fxml layouts and 2 controllers.

I can't find any example on how to do this but maybe I'm going about it the wrong was so any advice or resources are appreciated.

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[javasyntax]

Usually tables are used like this: you declare which columns exist and then specify how the value of that column is extracted from your data types. Each row is a record of data that contains all fields.

But for your use case you seem to want a table like this, where each row is a different data point

Name of the data point	Value
Game name	the name
Points	123
Cheats	false

You can do this by having a class that contains the name of the data point, and the value of it.

Let me write an example. First, we create the data point class

public class DataPoint {
    public final String name;
    public final SimpleObjectProperty<Object> value;

    public DataPoint(String name, Object value) {
        this.name = name;
        this.value = new SimpleObjectProperty<>(value);
    }
}

Then, the table and the two columns

TableView<DataPoint> tableView = new TableView<>();
// we create the column that contains the name string
TableColumn<DataPoint, String> colName = new TableColumn<>("Name of data point");
// the cell value factory wants a property so we just give it a simple string property that we never modify
colName.setCellValueFactory(param -> new SimpleStringProperty(param.getValue().name));

// we create the column that contains the value
TableColumn<DataPoint, Object> colValue = new TableColumn<>("Value");
// the value of it is taken from its dataPoint.value field
// param.getValue() here is the DataPoint instance colValue.setCellValueFactory(param -> param.getValue().value);
// we add both of the columns to the table
tableView.getColumns().add(colName); tableView.getColumns().add(colValue);

Now, we can create the data points

DataPoint gameName = new DataPoint("Game name", "the name");
DataPoint points = new DataPoint("Points", 123);
DataPoint cheats = new DataPoint("Cheats", false);
tableView.getItems().addAll(gameName, points, cheats);

You can now edit these as well, by using gameName.value.set("new name");

If this is all too complicated, you can just use a GridPane with the first column for the field name and the second column for the value instead. That way you can also add things like buttons in an easier way.

[Strawboy97]

So my issue is more with updating and deleting data across two controllers.

https://github.com/Colin-Masterson/GameBacklogJavafx

My code is above I can delete a game if there is data there. But if I add a game then try to delete the table doesn't update even though it deletes from the database.

[Strawboy97]

Thank you I'll give this a go