app/src/main/java/de/dhbwloe/campusapp/NavigationManager.java

   1 package de.dhbwloe.campusapp;
   2
   3 import android.os.Bundle;
   4 import android.support.v4.app.Fragment;
   5 import android.support.v4.app.FragmentActivity;
   6 import android.support.v4.app.FragmentTransaction;
   7 import android.view.Gravity;
   8 import android.view.View;
   9 import android.widget.LinearLayout;
  10 import android.widget.PopupWindow;
  11
  12 import java.lang.reflect.Constructor;
  13 import java.lang.reflect.InvocationTargetException;
  14 import java.util.ArrayList;
  15 import java.util.List;
  16
  17 import de.dhbwloe.campusapp.fragments.PopupFragment;
  18
  19 /**
  20  * Created by pk910 on 19.01.2016.
  21  */
  22 public class NavigationManager {
  23     private class NavPage {
  24         String name;
  25         Class<CampusAppFragment> fragmentClass;
  26         int fragmentType; // 0 = normal; 1 = fullscreen; 2 = popup
  27     };
  28
  29     private CampusAppContext AppContext;
  30     private NavPage oCurrentPage;
  31     private NavPage oParentPage;
  32     private Fragment oCurrentFragment;
  33     private Fragment oParentFragment;
  34     private int iFragmentContainerId;
  35     private ArrayList<NavPage> lNavigationPages = new ArrayList<NavPage>();
  36
  37     public NavigationManager(CampusAppContext context, int fragmentContainer) {
  38         AppContext = context;
  39         iFragmentContainerId = fragmentContainer;
  40         oCurrentPage = null;
  41     }
  42
  43     public void registerPage(String name, Class<?> fragment, int fragmentType) {
  44         NavPage page = new NavPage();
  45         page.name = name;
  46         page.fragmentClass = (Class<CampusAppFragment>) fragment;
  47         page.fragmentType = fragmentType;
  48         lNavigationPages.add(page);
  49     }
  50
  51     public String getCurrentPageName() {
  52         if(oCurrentPage == null)
  53             return null;
  54         if(oCurrentPage.fragmentType == 3 && oParentFragment != null){
  55             if(oCurrentFragment.isAdded())
  56                 return oCurrentPage.name;
  57             else {
  58                 closeDialog();
  59             }
  60         }
  61         return oCurrentPage.name;
  62     }
  63
  64     public CampusAppFragment getCurrentFragment() {
  65         if(oCurrentPage == null)
  66             return null;
  67         if(oCurrentPage.fragmentType != 3)
  68             return (CampusAppFragment)oCurrentFragment;
  69         else
  70             return ((PopupFragment)oCurrentFragment).getCurrentFragment();
  71     }
  72
  73     public void navigatePage(String name) {
  74         navigatePage(name, null, true);
  75     }
  76
  77     public void navigatePage(String name, Bundle args) {
  78         navigatePage(name, args, true);
  79     }
  80
  81     public void navigatePage(String name, Bundle args, boolean history) {
  82
  83         NavPage page = getPageByName(name);
  84         if(page == null)
  85             return;
  86         Fragment fragment;
  87
  88         if(page.fragmentType == 3) {
  89             PopupFragment popupFragment = new PopupFragment();
  90             if(args == null)
  91                 args = new Bundle();
  92             args.putString("target", "#"+page.name);
  93             fragment = popupFragment;
  94         } else {
  95             fragment = getFragmentOfPage(page);
  96         }
  97
  98         fragment.setArguments(args);
  99
 100         FragmentActivity fragmentActivity = (FragmentActivity) AppContext.getMainActivity();
 101         FragmentTransaction transaction = fragmentActivity.getSupportFragmentManager().beginTransaction();
 102
 103         if (oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 104             transaction.remove(oCurrentFragment);
 105             oCurrentPage = oParentPage;
 106             oCurrentFragment = oParentFragment;
 107         }
 108         if (page.fragmentType == 3) {
 109             transaction.add(fragment, "popup");
 110             oParentPage = oCurrentPage;
 111             oParentFragment = oCurrentFragment;
 112             history = false;
 113         } else {
 114             // remove fragments
 115             List<Fragment> al = fragmentActivity.getSupportFragmentManager().getFragments();
 116             if(al != null) {
 117                 for (Fragment frag : al) {
 118                     if (frag != null && frag.isAdded()) {
 119                         transaction.remove(frag);
 120                     }
 121                 }
 122             }
 123             transaction.add(iFragmentContainerId, fragment);
 124         }
 125         if (history)
 126             transaction.addToBackStack(null);
 127
 128         oCurrentPage = page;
 129         oCurrentFragment = fragment;
 130
 131         transaction.commit();
 132     }
 133
 134     private NavPage getPageByName(String name) {
 135         NavPage page = null;
 136         for(int i = 0; i < lNavigationPages.size(); i++) {
 137             if(lNavigationPages.get(i).name.equalsIgnoreCase(name)) {
 138                 page = lNavigationPages.get(i);
 139                 break;
 140             }
 141         }
 142         if(page == null)
 143             return null;
 144
 145         return page;
 146     }
 147
 148     private CampusAppFragment getFragmentOfPage(NavPage page) {
 149         Class<CampusAppFragment> fragmentClass = page.fragmentClass;
 150         Constructor fragmentConstructor;
 151         CampusAppFragment fragment;
 152         try {
 153             fragmentConstructor = fragmentClass.asSubclass(fragmentClass).getConstructor();
 154             fragment = (CampusAppFragment)fragmentConstructor.newInstance(new Object[]{});
 155         } catch (Exception e) {
 156             return null;
 157         }
 158         return fragment;
 159     }
 160
 161     public CampusAppFragment getPageFragment(String name) {
 162         NavPage page = getPageByName(name);
 163         if(page == null)
 164             return null;
 165         return getFragmentOfPage(page);
 166     }
 167
 168     public PopupFragment getDialog() {
 169         if(oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 170             PopupFragment fragment = (PopupFragment) oCurrentFragment;
 171             return fragment;
 172         }
 173         return null;
 174     }
 175
 176     public boolean closeDialog() {
 177         if(oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 178             PopupFragment fragment = (PopupFragment) oCurrentFragment;
 179             boolean wasAdded = false;
 180             if(oCurrentFragment.isAdded()) {
 181                 fragment.destroyView();
 182
 183                 FragmentActivity fragmentActivity = (FragmentActivity) AppContext.getMainActivity();
 184                 FragmentTransaction transaction = fragmentActivity.getSupportFragmentManager().beginTransaction();
 185
 186                 transaction.remove(oCurrentFragment);
 187                 transaction.commit();
 188                 wasAdded = true;
 189             }
 190
 191             oCurrentPage = oParentPage;
 192             oCurrentFragment = oParentFragment;
 193
 194             return wasAdded;
 195         }
 196         return false;
 197     }
 198
 199     public boolean back() {
 200         return closeDialog();
 201     }
 202
 203 }