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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.email.activity.setup;
     18 
     19 import android.app.Fragment;
     20 import android.os.Bundle;
     21 import android.view.LayoutInflater;
     22 import android.view.View;
     23 import android.view.ViewGroup;
     24 import android.widget.TextView;
     25 
     26 import com.android.email.R;
     27 import com.android.email.activity.UiUtilities;
     28 import com.google.common.annotations.VisibleForTesting;
     29 
     30 /**
     31  * Superclass for setup UI fragments.
     32  * Currently holds a super-interface for the callbacks, as well as the state it was launched for so
     33  * we can unwind things correctly when the user navigates the back stack.
     34  */
     35 public class AccountSetupFragment extends Fragment implements View.OnClickListener {
     36     private static final String SAVESTATE_STATE = "AccountSetupFragment.state";
     37     private int mState;
     38 
     39     protected View mNextButton;
     40     protected View mPreviousButton;
     41 
     42     public interface Callback {
     43         void onNextButton();
     44         void onBackPressed();
     45     }
     46 
     47     @Override
     48     public void onCreate(Bundle savedInstanceState) {
     49         super.onCreate(savedInstanceState);
     50         if (savedInstanceState != null) {
     51             mState = savedInstanceState.getInt(SAVESTATE_STATE);
     52         }
     53     }
     54 
     55     @Override
     56     public void onSaveInstanceState(Bundle outState) {
     57         super.onSaveInstanceState(outState);
     58         outState.putInt(SAVESTATE_STATE, mState);
     59     }
     60 
     61     public void setState(int state) {
     62         mState = state;
     63     }
     64 
     65     public int getState() {
     66         return mState;
     67     }
     68 
     69     /**
     70      * This method wraps the given content layout with the chrome appropriate for the account setup
     71      * flow. It also attaches itself as a click handler to the previous and next buttons.
     72      *
     73      * @param inflater LayoutInflater scoped to the appropriate context
     74      * @param container ViewGroup to inflate the view into
     75      * @param contentLayout Resource ID of the main content layout to insert into the template
     76      * @param headline Resource ID of the headline string
     77      * @return Fully inflated view hierarchy.
     78      */
     79     protected View inflateTemplatedView(final LayoutInflater inflater, final ViewGroup container,
     80             final int contentLayout, final int headline) {
     81         final View template = inflater.inflate(R.layout.account_setup_template, container, false);
     82 
     83         TextView headlineView = UiUtilities.getView(template, R.id.headline);
     84         if (headline > 0) {
     85             headlineView.setText(headline);
     86             headlineView.setVisibility(View.VISIBLE);
     87         } else {
     88             headlineView.setVisibility(View.GONE);
     89         }
     90 
     91         final ViewGroup contentContainer =
     92                 (ViewGroup) template.findViewById(R.id.setup_fragment_content);
     93         inflater.inflate(contentLayout, contentContainer, true);
     94 
     95         mNextButton = UiUtilities.getView(template, R.id.next);
     96         mNextButton.setOnClickListener(this);
     97         mPreviousButton = UiUtilities.getView(template, R.id.previous);
     98         mPreviousButton.setOnClickListener(this);
     99         return template;
    100     }
    101 
    102     @Override
    103     public void onClick(View v) {
    104         final int viewId = v.getId();
    105         final Callback callback = (Callback) getActivity();
    106 
    107         if (viewId == R.id.next) {
    108             callback.onNextButton();
    109         } else if (viewId == R.id.previous) {
    110             callback.onBackPressed();
    111         }
    112     }
    113 
    114     public void setNextButtonEnabled(boolean enabled) {
    115         if (mNextButton != null) {
    116             mNextButton.setEnabled(enabled);
    117         }
    118     }
    119 
    120     public boolean isNextButtonEnabled() {
    121         return mNextButton.isEnabled();
    122     }
    123 
    124 
    125     /**
    126      * Set visibility of the "previous" button
    127      * @param visibility {@link View#INVISIBLE}, {@link View#VISIBLE}, {@link View#GONE}
    128      */
    129     public void setPreviousButtonVisibility(int visibility) {
    130         mPreviousButton.setVisibility(visibility);
    131     }
    132 
    133     /**
    134      * Set the visibility of the "next" button
    135      * @param visibility {@link View#INVISIBLE}, {@link View#VISIBLE}, {@link View#GONE}
    136      */
    137     public void setNextButtonVisibility(int visibility) {
    138         mNextButton.setVisibility(visibility);
    139     }
    140 }
    141