package fr.pagesjaunes.mdm.ui;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.squareup.otto.Bus;
import javax.inject.Inject;
import fr.pagesjaunes.mdm.Injector;
import fr.pagesjaunes.mdm.R;
import fr.pagesjaunes.mdm.events.NavItemSelectedEvent;
import fr.pagesjaunes.mdm.util.UIUtils;
/**
* Fragment used for managing interactions for and presentation of a navigation drawer.
* See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction">
* design guidelines</a> for a complete explanation of the behaviors implemented here.
*/
public class NavigationDrawerFragment extends Fragment {
/**
* Remember the position of the selected item.
*/
private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
/**
* Per the design guidelines, you should show the drawer on launch until the user manually
* expands it. This shared preference tracks this.
*/
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
/**
* Helper component that ties the action bar to the navigation drawer.
*/
private ActionBarDrawerToggle drawerToggle;
private DrawerLayout drawerLayout;
private ListView drawerListView;
private View fragmentContainerView;
private int currentSelectedPosition = 0;
private boolean fromSavedInstanceState;
private boolean userLearnedDrawer;
@Inject protected SharedPreferences prefs;
@Inject protected Bus bus;
public NavigationDrawerFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Injector.inject(this);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
userLearnedDrawer = prefs.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
currentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
fromSavedInstanceState = true;
}
// Select either the default item (0) or the last selected item.
selectItem(currentSelectedPosition);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Indicate that this fragment would like to influence the set of actions in the action bar.
setHasOptionsMenu(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
drawerListView = (ListView) inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
drawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
});
drawerListView.setAdapter(new ArrayAdapter<String>(
getActionBar().getThemedContext(),
android.R.layout.simple_list_item_1,
android.R.id.text1,
new String[] {
getString(R.string.title_home)
}));
drawerListView.setItemChecked(currentSelectedPosition, true);
return drawerListView;
}
public boolean isDrawerOpen() {
return drawerLayout != null && drawerLayout.isDrawerOpen(fragmentContainerView);
}
/**
* Users of this fragment must call this method to set up the navigation drawer interactions.
*
* @param fragmentId The android:id of this fragment in its activity's layout.
* @param drawerLayout The DrawerLayout containing this fragment's UI.
*/
public void setUp(int fragmentId, DrawerLayout drawerLayout) {
fragmentContainerView = getActivity().findViewById(fragmentId);
this.drawerLayout = drawerLayout;
// set a custom shadow that overlays the main content when the drawer opens
//drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
// set up the drawer's list view with items and click listener
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the navigation drawer and the action bar app icon.
drawerToggle = new ActionBarDrawerToggle(
getActivity(), /* host Activity */
NavigationDrawerFragment.this.drawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.navigation_drawer_open, /* "open drawer" description for accessibility */
R.string.navigation_drawer_close /* "close drawer" description for accessibility */
) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!userLearnedDrawer) {
// The user manually opened the drawer; store this flag to prevent auto-showing
// the navigation drawer automatically in the future.
userLearnedDrawer = true;
prefs.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!userLearnedDrawer && !fromSavedInstanceState) {
this.drawerLayout.openDrawer(fragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
this.drawerLayout.post(new Runnable() {
@Override
public void run() {
drawerToggle.syncState();
}
});
this.drawerLayout.setDrawerListener(drawerToggle);
}
private void selectItem(int position) {
currentSelectedPosition = position;
if (drawerListView != null) {
drawerListView.setItemChecked(position, true);
}
if (drawerLayout != null) {
drawerLayout.closeDrawer(fragmentContainerView);
}
// Fire the event off to the bus which.
bus.post(new NavItemSelectedEvent(position));
}
@Override
public void onSaveInstanceState(Bundle outState) {
outState.putInt(STATE_SELECTED_POSITION, currentSelectedPosition);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if(!isTablet()) {
// Forward the new configuration the drawer toggle component.
drawerToggle.onConfigurationChanged(newConfig);
}
}
private boolean isTablet() {
if(getActivity() != null) {
return UIUtils.isTablet(getActivity());
}
return false;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// If the drawer is open, show the global app actions in the action bar. See also
// showGlobalContextActionBar, which controls the top-left area of the action bar.
if (drawerLayout != null && isDrawerOpen()) {
inflater.inflate(R.menu.global, menu);
showGlobalContextActionBar();
}
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* Per the navigation drawer design guidelines, updates the action bar to show the global app
* 'context', rather than just what's in the current screen.
*/
private void showGlobalContextActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setTitle(R.string.app_name);
}
private ActionBar getActionBar() {
return ((ActionBarActivity) getActivity()).getSupportActionBar();
}
}