Example app controls

- Add vertical view pager
- Add controls fragment
- Separate parent and children gridlayout from controls
- Clean up continuous weighted weights

app/src/main/java/com/willowtreeapps/spurceexampleapp/SpruceActivity.java

@@ -27,36 +27,54 @@
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentStatePagerAdapter;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.Spinner;
 
+import com.willowtreeapps.spurceexampleapp.fragments.ControlsFragment;
 import com.willowtreeapps.spurceexampleapp.fragments.ViewFragment;
+import com.willowtreeapps.spurceexampleapp.pager.VerticalViewPager;
 
-public class SpruceActivity extends AppCompatActivity {
+import java.util.ArrayList;
+import java.util.List;
+
+public class SpruceActivity extends AppCompatActivity
+        implements ViewFragment.OnParentAndChildCreationListener {
+
+    public ViewGroup parent;
+    public List<View> children = new ArrayList<>();
+    public Spinner sortDropDown;
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.activity_fragment);
+        setContentView(R.layout.fragment_pager);
 
         FragmentManager fm = getSupportFragmentManager();
-        Fragment viewFragment = fm.findFragmentById(R.id.view_fragment);
 
-        if (viewFragment == null) {
-            viewFragment = ViewFragment.newInstance();
-            fm.beginTransaction()
-                    .add(R.id.view_fragment, viewFragment)
-                    .commit();
-        }
+        VerticalViewPager verticalPager = (VerticalViewPager) findViewById(R.id.vertical_pager);
+        VerticalPagerAdapter adapter = new VerticalPagerAdapter(fm);
+        verticalPager.setAdapter(adapter);
 
         Toolbar toolBar = (Toolbar) findViewById(R.id.tool_bar);
         setSupportActionBar(toolBar);
         if (getSupportActionBar() != null) {
             getSupportActionBar().setDisplayShowTitleEnabled(false);
         }
+
+        sortDropDown = (Spinner) findViewById(R.id.sort_selection);
+        ArrayAdapter<CharSequence> spinnerAdapter = ArrayAdapter.createFromResource(this,
+                R.array.sort_functions,
+                R.layout.spinner_item);
+        spinnerAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
+        sortDropDown.setAdapter(spinnerAdapter);
     }
 
     @Override
@@ -77,4 +95,33 @@ public boolean onOptionsItemSelected(MenuItem item) {
         }
         return super.onOptionsItemSelected(item);
     }
+
+    @Override
+    public void onParentAndChildrenPrepared(ViewGroup parent, List<View> children) {
+        this.parent = parent;
+        this.children = children;
+    }
+
+    private class VerticalPagerAdapter extends FragmentStatePagerAdapter {
+
+        VerticalPagerAdapter(FragmentManager fm) {
+            super(fm);
+        }
+
+        @Override
+        public Fragment getItem(int position) {
+            switch (position) {
+                case 1:
+                    return ControlsFragment.newInstance();
+                default:
+                    return ViewFragment.newInstance();
+            }
+        }
+
+        @Override
+        public int getCount() {
+            return 2;
+        }
+
+    }
 }