javafx GridPane retrieve specific Cell content

Question

I want to retrieve the content of one specific cell in a Gridpane. I have put buttons in the cells with the

setConstraints(btt , 0 ,1 ) 

setConstraints(btt , 0 ,2 )

getChildren().add....

In my case the GridPane.getChildren.get(10) is not good. I want to go directly to the cell(4,2) and get its content.

Answer 1

Well I guess if there is no solution to get a specific node from gridpane by is column and row index, I have a function to do that,

private Node getNodeFromGridPane(GridPane gridPane, int col, int row) {
    for (Node node : gridPane.getChildren()) {
        if (GridPane.getColumnIndex(node) == col && GridPane.getRowIndex(node) == row) {
            return node;
        }
    }
    return null;
}

Answer 2

Assuming you have an 8x8 girdPane where i is the rows and j is the column, you can write:

myGridPane.getChildren().get(i*8+j)

The return type is an object, so you will have to cast it, in my case it's:

(StackPane) (myGridPane.getChildren().get(i*8+j))