com/android/setupwizardlib/template/NavigationBarMixin.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.setupwizardlib.template;

import android.view.View;
import com.android.setupwizardlib.R;
import com.android.setupwizardlib.TemplateLayout;
import com.android.setupwizardlib.view.NavigationBar;
import com.android.setupwizardlib.view.NavigationBar.NavigationBarListener;

/** A {@link Mixin} for interacting with a {@link NavigationBar}. */
public class NavigationBarMixin implements Mixin {

  private final TemplateLayout templateLayout;

  /** @param layout The layout this mixin belongs to. */
  public NavigationBarMixin(TemplateLayout layout) {
    templateLayout = layout;
  }

  /**
   * @return The navigation bar instance in the layout, or null if the layout does not have a
   *     navigation bar.
   */
  public NavigationBar getNavigationBar() {
    final View view = templateLayout.findManagedViewById(R.id.suw_layout_navigation_bar);
    return view instanceof NavigationBar ? (NavigationBar) view : null;
  }

  /**
   * Sets the label of the next button.
   *
   * @param text Label of the next button.
   */
  public void setNextButtonText(int text) {
    getNavigationBar().getNextButton().setText(text);
  }

  /**
   * Sets the label of the next button.
   *
   * @param text Label of the next button.
   */
  public void setNextButtonText(CharSequence text) {
    getNavigationBar().getNextButton().setText(text);
  }

  /** @return The current label of the next button. */
  public CharSequence getNextButtonText() {
    return getNavigationBar().getNextButton().getText();
  }

  /**
   * Sets the listener to handle back and next button clicks in the navigation bar.
   *
   * @see NavigationBar#setNavigationBarListener(NavigationBarListener)
   * @see NavigationBarListener
   */
  public void setNavigationBarListener(NavigationBarListener listener) {
    getNavigationBar().setNavigationBarListener(listener);
  }
}