UITraversal.java

package ui;

import javafx.scene.Node;
import javafx.scene.control.ListView;
import ui.components.FilterTextField;
import ui.issuecolumn.ColumnControl;
import ui.issuepanel.IssuePanel;
import ui.issuepanel.IssuePanelCard;

public class UITraversal {

    private final ColumnControl columns;

    public UITraversal(ColumnControl columns) {
        this.columns = columns;
    }

    public ColumnControl panels() {
        return columns;
    }

    /**
     * A bit of reflection to factor out the pattern of checking that a Node is
     * of a specific type, then casting to that type.
     */
    private static <T> T check(Node node, Class<T> type) {
        assert type.isInstance(node) : String.format("%s is not of type %s!" +
            "The traversal library is probably out of date!",
            node, type.getSimpleName());
        return type.cast(node);
    }

    public IssuePanel panel(int index) {
        return check(columns.getChildren().get(index), IssuePanel.class);
    }

    public FilterTextField filterField(int panelIndex) {
        // TODO doesn't actually work (there's a HBox in the way), but this is the idea
        return check(panel(panelIndex).getChildren().get(0), FilterTextField.class);
    }

    public IssuePanelCard issueCard(int panelIndex, int issueId) {
        ListView<?> listView = check(panel(panelIndex).getChildren().get(1), ListView.class);
        // TODO go into the listview to find cells, cards, etc.
        assert false : "not yet implemented";
        return null;
    }
}