app/src/main/java/net/ktnx/mobileledger/ui/MobileLedgerListFragment.java

   1 /*
   2  * Copyright © 2020 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.ui;
  19
  20 import android.view.MotionEvent;
  21
  22 import androidx.annotation.NonNull;
  23 import androidx.fragment.app.Fragment;
  24 import androidx.recyclerview.widget.RecyclerView;
  25 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
  26
  27 import net.ktnx.mobileledger.ui.activity.MainActivity;
  28 import net.ktnx.mobileledger.ui.transaction_list.TransactionListAdapter;
  29 import net.ktnx.mobileledger.utils.Colors;
  30 import net.ktnx.mobileledger.utils.DimensionUtils;
  31
  32 public class MobileLedgerListFragment extends Fragment {
  33     public SwipeRefreshLayout refreshLayout;
  34     public TransactionListAdapter modelAdapter;
  35     protected RecyclerView root;
  36     @NonNull
  37     public MainActivity getMainActivity() {
  38         return (MainActivity) requireActivity();
  39     }
  40     protected void themeChanged(Integer counter) {
  41         refreshLayout.setColorSchemeColors(Colors.getSwipeCircleColors());
  42     }
  43     public void onBackgroundTaskRunningChanged(Boolean isRunning) {
  44         if (getActivity() == null)
  45             return;
  46         if (refreshLayout == null)
  47             return;
  48         refreshLayout.setRefreshing(isRunning);
  49     }
  50     protected void manageFabOnScroll() {
  51         final MainActivity mainActivity = getMainActivity();
  52         int triggerPixels = DimensionUtils.dp2px(mainActivity, 30f);
  53         root.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
  54             private float upAnchor = -1;
  55             private float downAnchor = -1;
  56             private float lastY;
  57             @Override
  58             public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
  59                 switch (e.getActionMasked()) {
  60                     case MotionEvent.ACTION_DOWN:
  61                         lastY = upAnchor = downAnchor = e.getAxisValue(MotionEvent.AXIS_Y);
  62                         break;
  63                     case MotionEvent.ACTION_MOVE:
  64                         final float currentY = e.getAxisValue(MotionEvent.AXIS_Y);
  65                         if (currentY > lastY) {
  66                             // swipe down
  67                             upAnchor = lastY;
  68
  69                             mainActivity.fabShouldShow();
  70                         }
  71                         else {
  72                             // swipe up
  73                             downAnchor = lastY;
  74
  75                             if (currentY < upAnchor - triggerPixels)
  76                                 mainActivity.fabHide();
  77                         }
  78
  79                         lastY = currentY;
  80
  81                         break;
  82                 }
  83                 return false;
  84             }
  85             @Override
  86             public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
  87             }
  88             @Override
  89             public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
  90             }
  91         });
  92     }
  93 }