cover multiple selection poll

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicAdapter.java

@@ -15,6 +15,7 @@ import android.support.annotation.NonNull;
 import android.support.v4.content.res.ResourcesCompat;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.content.res.AppCompatResources;
+import android.support.v7.widget.AppCompatButton;
 import android.support.v7.widget.RecyclerView;
 import android.text.InputType;
 import android.text.TextUtils;
@@ -27,6 +28,8 @@ import android.view.inputmethod.InputMethodManager;
 import android.webkit.WebResourceRequest;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
 import android.widget.EditText;
 import android.widget.ImageButton;
 import android.widget.ImageView;
@@ -38,6 +41,7 @@ import android.widget.TextView;
 import com.squareup.picasso.Picasso;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 
 import gr.thmmy.mthmmy.R;
@@ -135,6 +139,10 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
             editPostEdittext.requestFocus();
 
             return new EditMessageViewHolder(view);
+        } else if (viewType == Poll.TYPE_POLL) {
+            View view = LayoutInflater.from(parent.getContext()).
+                    inflate(R.layout.activity_topic_edit_row, parent, false);
+            return new PollViewHolder(view);
         } else {
             throw new IllegalArgumentException("Unknown view type");
         }
@@ -145,7 +153,18 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
     public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder currentHolder,
                                  final int position) {
         if (currentHolder.getItemViewType() == Poll.TYPE_POLL) {
-
+            Poll poll = (Poll) topicItems.get(position);
+            Poll.Entry[] entries = poll.getEntries();
+            PollViewHolder holder = (PollViewHolder) currentHolder;
+            holder.question.setText(poll.getQuestion());
+            if (poll.getAvailableVoteCount() > 1) {
+                for (int i = 0; i < entries.length; i++) {
+                    CheckBox checkBox = new CheckBox(context);
+                    checkBox.setText(entries[i].getEntryName());
+                    checkBox.setOnCheckedChangeListener((buttonView, isChecked) ->
+                            viewModel.onVoteCheckboxClicked(holder.optionsLayout.indexOfChild(buttonView), isChecked));
+                }
+            }
         } else {
             Post currentPost = (Post) topicItems.get(position);
             if (currentHolder instanceof PostViewHolder) {
@@ -644,6 +663,23 @@ class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
         }
     }
 
+    static class PollViewHolder extends RecyclerView.ViewHolder {
+        final TextView question, errorTooManySelected;
+        final LinearLayout optionsLayout;
+        final AppCompatButton submitButton;
+        final AppCompatButton removeVotesButton;
+
+        public PollViewHolder(View itemView) {
+            super(itemView);
+
+            question = itemView.findViewById(R.id.question_textview);
+            optionsLayout = itemView.findViewById(R.id.options_layout);
+            submitButton = itemView.findViewById(R.id.submit_button);
+            removeVotesButton = itemView.findViewById(R.id.remove_vote_button);
+            errorTooManySelected = itemView.findViewById(R.id.error_too_many_checked);
+        }
+    }
+
     /**
      * This class is used to handle link clicks in WebViews. When link url is one that the app can
      * handle internally, it does. Otherwise user is prompt to open the link in a browser.

app/src/main/java/gr/thmmy/mthmmy/model/Poll.java

@@ -3,21 +3,36 @@ package gr.thmmy.mthmmy.model;
 import java.text.DecimalFormat;
 
 public class Poll extends TopicItem {
-    public static int TYPE_POLL = 3;
+    public static final int TYPE_POLL = 3;
 
     private final String question;
     private Entry[] entries;
     private int availableVoteCount;
-    private String pollFormUrl, sc, removeVoteUrl;
+    private String pollFormUrl, sc, removeVoteUrl, showVoteResultsUrl;
 
     public Poll(String question, Entry[] entries, int availableVoteCount, String pollFormUrl, String sc,
-                String removeVoteUrl) {
+                String removeVoteUrl, String showVoteResultsUrl) {
         this.question = question;
         this.entries = entries;
         this.availableVoteCount = availableVoteCount;
         this.pollFormUrl = pollFormUrl;
         this.sc = sc;
         this.removeVoteUrl = removeVoteUrl;
+        this.showVoteResultsUrl = showVoteResultsUrl;
+    }
+
+    public int totalVotes() {
+        int sum = 0;
+        for (Entry entry : entries) {
+            sum += entry.votes;
+        }
+        return sum;
+    }
+
+    public String getVotePercentage(int index) {
+        DecimalFormat format = new DecimalFormat(".#");
+        double percentage = 100 * ((double) entries[index].votes / (double) totalVotes());
+        return format.format(percentage);
     }
 
     public String getQuestion() {
@@ -44,21 +59,11 @@ public class Poll extends TopicItem {
         return removeVoteUrl;
     }
 
-    public int totalVotes() {
+    public String getShowVoteResultsUrl() {
-        int sum = 0;
+        return showVoteResultsUrl;
-        for (Entry entry : entries) {
-            sum += entry.votes;
-        }
-        return sum;
-    }
-
-    public String getVotePercentage(int index) {
-        DecimalFormat format = new DecimalFormat(".#");
-        double percentage = 100 * ((double) entries[index].votes / (double) totalVotes());
-        return format.format(percentage);
     }
 
-    static class Entry {
+    public static class Entry {
         private final String entryName;
         private int votes;
 

app/src/main/java/gr/thmmy/mthmmy/viewmodel/TopicViewModel.java

@@ -5,6 +5,8 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.preference.PreferenceManager;
+import android.view.View;
+import android.widget.CheckBox;
 
 import java.util.ArrayList;
 
@@ -44,6 +46,7 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
      * holds the adapter position of the post being edited
      */
     private int postBeingEditedPosition;
+    private ArrayList<Integer> selectedVoteIndices;
 
     private TopicTask currentTopicTask;
     private PrepareForEditTask currentPrepareForEditTask;
@@ -245,6 +248,15 @@ public class TopicViewModel extends BaseViewModel implements TopicTask.OnTopicTa
         if (changePage && oldIndicatorIndex != this.pageIndicatorIndex.getValue()) performPageChange();
     }
 
+    public void onVoteCheckboxClicked(int index, boolean checked) {
+        if (checked) {
+            selectedVoteIndices.add(index);
+        } else {
+            selectedVoteIndices.remove(index);
+        }
+
+    }
+
     // <-------------Just getters, setters and helper methods below here---------------->
 
     public MutableLiveData<String> getTopicViewers() {

app/src/main/res/layout/activity_topic_poll.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/question_textview"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" />
+
+    <LinearLayout
+        android:id="@+id/options_layout"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"/>
+
+    <TextView
+        android:id="@+id/error_too_many_checked"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/error_too_many_checked"
+        android:textColor="@color/red"
+        android:visibility="gone"/>
+
+    <android.support.v7.widget.AppCompatButton
+        android:id="@+id/submit_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/submit"/>
+
+    <android.support.v7.widget.AppCompatButton
+        android:id="@+id/remove_vote_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/remove_vote_button"
+        android:visibility="gone"/>
+    
+    <android.support.v7.widget.AppCompatButton
+        android:id="@+id/show_poll_results_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/show_vote_results_button"
+        android:visibility="gone"/>
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -59,6 +59,9 @@
     <string name="generic_network_error">Network error</string>
     <string name="retry">retry</string>
     <string name="unauthorized_topic_error">This topic is either missing or off limits to you</string>
+    <string name="remove_vote_button">Remove vote</string>
+    <string name="show_vote_results_button">Show results</string>
+    <string name="error_too_many_checked">You may only select %d options</string>
 
     <!--Profile Activity-->
     <string name="username">Username</string>