After Deleting Shape.. I Cannot Rotate Anymore.. - JavaFX - list

Question

I currently have a program where I can add rectangles to the scene. These can be selected, rotated, resized and deleted. If I select on a rectangle and click rotate it works, if I add another rectangle and click rotate it still works. However, If I 'DELETE' one of the rectangles then I cannot rotate the other one, or any additional added ones anymore.
I have the following fields and two methods:
private List<Node> selectedShapes = new ArrayList<>();
private double angle[] = {0};
#FXML
private AnchorPane container2;
Rotation:
public void rotateObject(ActionEvent event) throws IOException{
angle[0] = angle[0] + 45;
selectedShapes.get(0).setRotate(angle[0]);
}
Deletion
public void deleteButton(ActionEvent e) {
deletebutton.setOnAction(a -> container2.getChildren().removeAll(selectedShapes));
selectedShapes.remove(0);
}
I feel I am selecting or deleting the selected shapes in the incorrect way. Could someone guide me as to what the correct way to select the current item would be. So if I delete one of the rectangles, the other one should still be rotatable. Thanks

Answer 1

You want to create a Rectangle List, so instead of going through the base class Node why not use list of Rectangle/Shape directly :
List<Shape> selectedShapes = new ArrayList<>();
And for your problem, you use an array angle[], this one can not be extended, and there you call only index 0, i understand (if I'm not mistaken) that this array is to store the angle of each Rectangle to solve it uses a List there too:
List<Double> angle = new ArrayList<>();
And finally to find yourself in your list, uses an int that you increment (at the time of the addition) and decrement (at the time of the deletion) :
int Index = 0;
Edit:
Here's a simple methods that you could follow to organize your project :
private List<Rectangle> recs = new ArrayList<>();
private final double width = 50, height = 50;
private final double x = 200, y = 200;
public void add(){
recs.add(new Rectangle(x, y, width, height));
/*Properties of your rectangle (fill,shape...)*/
}
public void delete(int deleteIndex){
/*Here the root is the container of your Rectangles*/
root.getChildren().remove(recs.get(deleteIndex));
recs.remove(deleteIndex);
}
public void rotate(int recIndex, double angle){
recs.get(recIndex).setRotate(recs.get(recIndex).getRotate()+angle);
}
Good luck !