Android Open Source - ListView-Swipe-to-Delete Item Base List Handler

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2013 Steelkiwi Development, Julia Zudikova
 * /*  w  w w . j  a va 2  s  . c om*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.skd.swipetodelete.list;

import android.widget.ListView;

/*
 * Represents a base class holding callback methods for the following actions:
 * - list view item is clicked;
 * - list view item is swiped;
 * - list view item is about to be removed;
 * - a menu action is triggered on a list view item.
 */

public abstract class ItemBaseListHandler {
  private ListView list;
  
  public ItemBaseListHandler(ListView list) {
    this.list = list;
  }
  
  public void onItemClicked(int position) {
    if ((list == null) && (((ItemBaseListAdapter) list.getAdapter()) == null)) { return; }
    
    ((ItemBaseListAdapter) list.getAdapter()).showItemMenu(position);
  }
  
  public void onItemSwiped(boolean isRight, int position) {
    if ((list == null) && (((ItemBaseListAdapter) list.getAdapter()) == null)) { return; }
    
    if (isRight) {
      ((ItemBaseListAdapter) list.getAdapter()).markToRemove(position);
    } else {
      ((ItemBaseListAdapter) list.getAdapter()).unmarkToRemove(position);
    }
  }

  public void onItemRemove(int position) {
    if ((list == null) && (((ItemBaseListAdapter) list.getAdapter()) == null)) { return; }
    
    ((ItemBaseListAdapter) list.getAdapter()).remove(position);
  }

  public abstract void onItemMenuAction(int position, String action);

  public ListView getListView() {
    return list;
  }
  
  public boolean hasMarkedToRemoveItems() {
    if ((list == null) && (((ItemBaseListAdapter) list.getAdapter()) == null)) { return false; }
    
    return ((ItemBaseListAdapter) list.getAdapter()).hasMarkedToRemove();
  }
  
  public void removeAllItems() {
    if ((list == null) && (((ItemBaseListAdapter) list.getAdapter()) == null)) { return; }
    
    ((ItemBaseListAdapter) list.getAdapter()).removeAll();
  }
}

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