Method settingValueDidChange

src/Encoder/ADFGXCipher.js:227–259

* Triggered when a setting field has changed. * @param {Field} setting Sender setting field * @param {mixed} value New field value

(setting, value)

   * @param {mixed} value New field value
   */
  settingValueDidChange (setting, value) {
    switch (setting.getName()) {
      case 'variant': {
        // Configure the Polybius square according to the given variant
        const variant = this.constructor.getVariant(value)
        this._polybiusSquare.setSettingValues({
          rows: variant.squarePositions,
          columns: variant.squarePositions
        })

        // Update alphabet, if setting is valid
        const alphabetSetting = this.getSetting('alphabet')
        if (alphabetSetting.isValid()) {
          this._polybiusSquare.setSettingValue('alphabet',
            alphabetSetting.getValue().extend(variant.alphabet))
        }

        // Configure variant constraints
        this.getSetting('alphabet').setMaxLength(variant.alphabet.length)
        this.getSetting('key').setMaxLength(variant.alphabet.length - 1)
        break
      }

      case 'alphabet': {
        // Derive Polybius square mixed alphabet from the alphabet setting
        const variant = this.constructor.getVariant(
          this.getSettingValue('variant'))
        this._polybiusSquare.setSettingValue('alphabet',
          value.extend(variant.alphabet))
        break
      }
    }
  }

  /**
   * Returns a variant for the given name.