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

   1 /*
   2  * Copyright © 2019 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 swiper;
  34     public TransactionListAdapter modelAdapter;
  35     protected MainActivity mActivity;
  36     protected RecyclerView root;
  37     protected void themeChanged(Integer counter) {
  38         swiper.setColorSchemeColors(Colors.getSwipeCircleColors());
  39     }
  40     public void onBackgroundTaskRunningChanged(Boolean isRunning) {
  41         if (mActivity == null)
  42             return;
  43         if (swiper == null)
  44             return;
  45         swiper.setRefreshing(isRunning);
  46     }
  47     protected void manageFabOnScroll() {
  48         int triggerPixels = DimensionUtils.dp2px(mActivity, 30f);
  49         root.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
  50             private float upAnchor = -1;
  51             private float downAnchor = -1;
  52             private float lastY;
  53             @Override
  54             public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
  55                 switch (e.getActionMasked()) {
  56                     case MotionEvent.ACTION_DOWN:
  57                         lastY = upAnchor = downAnchor = e.getAxisValue(MotionEvent.AXIS_Y);
  58                         break;
  59                     case MotionEvent.ACTION_MOVE:
  60                         final float currentY = e.getAxisValue(MotionEvent.AXIS_Y);
  61                         if (currentY > lastY) {
  62                             // swipe down
  63                             upAnchor = lastY;
  64
  65                             mActivity.fabShouldShow();
  66                         }
  67                         else {
  68                             // swipe up
  69                             downAnchor = lastY;
  70
  71                             if (currentY < upAnchor - triggerPixels)
  72                                 mActivity.fabHide();
  73                         }
  74
  75                         lastY = currentY;
  76
  77                         break;
  78                 }
  79                 return false;
  80             }
  81             @Override
  82             public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
  83             }
  84             @Override
  85             public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
  86             }
  87         });
  88     }
  89 }