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