PrologDisplay.java 文件源码

/**
 * Constructs and returns the query field.
 * Also initialises {@link #queryEdit}.
 */
private JComboBox<String> getQueryField() {
    if (this.queryField == null) {
        this.queryField = new JComboBox<>(PREFS.get("queryHistory", "").split("\\n"));
        this.queryField.setFont(EDIT_FONT);
        this.queryField.setEditable(true);
        this.queryField.setEnabled(true);
        this.queryField.setPrototypeDisplayValue("groove+prolog");
        this.queryEdit = (JTextComponent) this.queryField.getEditor().getEditorComponent();
        this.queryEdit.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
                    executeQuery();
                    giveFocusToNextResultButton();
                }
            }
        });
    }
    return this.queryField;
}