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         return oCurrentPage.name;
  54     }
  55
  56     public CampusAppFragment getCurrentFragment() {
  57         if(oCurrentPage == null)
  58             return null;
  59         if(oCurrentPage.fragmentType != 3)
  60             return (CampusAppFragment)oCurrentFragment;
  61         return null;
  62     }
  63
  64     public void navigatePage(String name) {
  65         navigatePage(name, null, true);
  66     }
  67
  68     public void navigatePage(String name, Bundle args) {
  69         navigatePage(name, args, true);
  70     }
  71
  72     public void navigatePage(String name, Bundle args, boolean history) {
  73
  74         NavPage page = getPageByName(name);
  75         if(page == null)
  76             return;
  77         Fragment fragment;
  78
  79         if(page.fragmentType == 3) {
  80             PopupFragment popupFragment = new PopupFragment();
  81             if(args == null)
  82                 args = new Bundle();
  83             args.putString("target", "#"+page.name);
  84             fragment = popupFragment;
  85         } else {
  86             fragment = getFragmentOfPage(page);
  87         }
  88
  89         fragment.setArguments(args);
  90
  91         FragmentActivity fragmentActivity = (FragmentActivity) AppContext.getMainActivity();
  92         FragmentTransaction transaction = fragmentActivity.getSupportFragmentManager().beginTransaction();
  93
  94         if (oCurrentPage != null && oCurrentPage.fragmentType == 3) {
  95             transaction.remove(oCurrentFragment);
  96             oCurrentPage = oParentPage;
  97             oCurrentFragment = oParentFragment;
  98         }
  99         if (page.fragmentType == 3) {
 100             transaction.add(fragment, "popup");
 101             oParentPage = oCurrentPage;
 102             oParentFragment = oCurrentFragment;
 103             history = false;
 104         } else if (oCurrentPage != null) {
 105             transaction.replace(iFragmentContainerId, fragment);
 106         } else {
 107             transaction.add(iFragmentContainerId, fragment);
 108         }
 109         if (history)
 110             transaction.addToBackStack(null);
 111
 112         oCurrentPage = page;
 113         oCurrentFragment = fragment;
 114
 115         transaction.commit();
 116     }
 117
 118     private NavPage getPageByName(String name) {
 119         NavPage page = null;
 120         for(int i = 0; i < lNavigationPages.size(); i++) {
 121             if(lNavigationPages.get(i).name.equalsIgnoreCase(name)) {
 122                 page = lNavigationPages.get(i);
 123                 break;
 124             }
 125         }
 126         if(page == null)
 127             return null;
 128
 129         return page;
 130     }
 131
 132     private CampusAppFragment getFragmentOfPage(NavPage page) {
 133         Class<CampusAppFragment> fragmentClass = page.fragmentClass;
 134         Constructor fragmentConstructor;
 135         CampusAppFragment fragment;
 136         try {
 137             fragmentConstructor = fragmentClass.asSubclass(fragmentClass).getConstructor();
 138             fragment = (CampusAppFragment)fragmentConstructor.newInstance(new Object[]{});
 139         } catch (Exception e) {
 140             return null;
 141         }
 142         return fragment;
 143     }
 144
 145     public CampusAppFragment getPageFragment(String name) {
 146         NavPage page = getPageByName(name);
 147         if(page == null)
 148             return null;
 149         return getFragmentOfPage(page);
 150     }
 151
 152     public PopupFragment getDialog() {
 153         if(oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 154             PopupFragment fragment = (PopupFragment) oCurrentFragment;
 155             return fragment;
 156         }
 157         return null;
 158     }
 159
 160     public boolean closeDialog() {
 161         if(oCurrentPage != null && oCurrentPage.fragmentType == 3) {
 162             PopupFragment fragment = (PopupFragment) oCurrentFragment;
 163             fragment.destroyView();
 164
 165             FragmentActivity fragmentActivity = (FragmentActivity) AppContext.getMainActivity();
 166             FragmentTransaction transaction = fragmentActivity.getSupportFragmentManager().beginTransaction();
 167
 168             transaction.remove(oCurrentFragment);
 169
 170             oCurrentPage = oParentPage;
 171             oCurrentFragment = oParentFragment;
 172
 173             transaction.commit();
 174             return true;
 175         }
 176         return false;
 177     }
 178
 179     public boolean back() {
 180         return closeDialog();
 181     }
 182
 183 }