/TextEnlarger/src/com/ideal/textenlarger/ExtendedCheckBoxListAdapter.java

  1/*
  2 * Copyright (C) 2010 The IDEAL Group
  3 *
  4 * Licensed under the Apache License, Version 2.0 (the "License");
  5 * you may not use this file except in compliance with the License.
  6 * You may obtain a copy of the License at
  7 *
  8 *      http://www.apache.org/licenses/LICENSE-2.0
  9 *
 10 * Unless required by applicable law or agreed to in writing, software
 11 * distributed under the License is distributed on an "AS IS" BASIS,
 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13 * See the License for the specific language governing permissions and
 14 * limitations under the License.
 15 */
 16package com.ideal.textenlarger;
 17
 18
 19import java.util.ArrayList;
 20import java.util.List;
 21
 22import android.content.Context;
 23import android.view.View;
 24import android.view.ViewGroup;
 25import android.widget.BaseAdapter;
 26
 27/**
 28 * Class needed by ApplicationsListActivity.
 29 *
 30 * This was taken from a checkbox list tutorial at anddev.org:
 31 * http://www.anddev.org/extended_checkbox_list__extension_of_checkbox_text_list_tu-t5734.html
 32 */
 33public class ExtendedCheckBoxListAdapter extends BaseAdapter {
 34
 35	/** Remember our context so we can use it when constructing views. */
 36	private Context mContext;
 37
 38	private List<ExtendedCheckBox> mItems = new ArrayList<ExtendedCheckBox>();
 39
 40	/**
 41	 * 
 42	 * @param context - Render context
 43	 */
 44	public ExtendedCheckBoxListAdapter(Context context) {
 45		mContext = context;             
 46	}
 47
 48	/**
 49	 * Add a new Item at the end of the exiting ones
 50	 * @param it - New item to be added
 51	 */
 52	public void addItem(ExtendedCheckBox it) { 
 53    	mItems.add(it); 
 54    }
 55
 56	/**
 57	 * Will force to use a list of items
 58	 * @param lit - List of items to be used
 59	 */
 60	public void setListItems(List<ExtendedCheckBox> lit) { 
 61    	mItems = lit; 
 62    }
 63
 64    /** 
 65     * @return The number of items this adapter offers 
 66     */
 67    public int getCount() { 
 68    	return mItems.size(); 
 69    }
 70
 71    /**
 72     * Return item at a specific position
 73     */
 74    public Object getItem(int position) { 
 75    	return mItems.get(position); 
 76    }
 77    
 78    /**
 79     * Returns the position of an element
 80     */
 81    public int GetPosition( ExtendedCheckBox item ) {
 82    	int count = getCount();
 83    	for ( int i = 0; i < count; i++ )
 84    	{
 85    		if ( item.compareTo((ExtendedCheckBox)getItem(i)) == 0 )
 86    			return i;
 87    	}
 88    	return -1;
 89    }
 90
 91    /**
 92     * Set selection of an item
 93     * @param value - true or false
 94     * @param position - position
 95     */
 96    public void setChecked(boolean value, int position) {
 97        mItems.get(position).setChecked(value);
 98    }
 99
100    /**
101     * Select all elements
102     */
103    public void selectAll() {
104        for(ExtendedCheckBox cboxtxt: mItems)
105             cboxtxt.setChecked(true);
106        
107        /* Things have changed, do a redraw. */
108        this.notifyDataSetInvalidated();
109    }
110    
111    /**
112     * Deselect all elements
113     */
114    public void deselectAll() {
115        for(ExtendedCheckBox cboxtxt: mItems)
116            cboxtxt.setChecked(false);
117        
118       /* Things have changed, do a redraw. */
119       this.notifyDataSetInvalidated();
120    }
121
122    /**
123     * Decides if all items are selectable
124     * @return - true or false
125     */
126    public boolean areAllItemsSelectable() { 
127    	return false; 
128    }
129
130    /** 
131     * Use the array index as a unique id
132     */
133    public long getItemId(int position) {
134         return position;
135    }
136
137    /**
138     * Do not recycle a view if one is already there, if not the data could get corrupted and
139     * the checkbox state could be lost. 
140     * @param convertView The old view to overwrite
141     * @returns a CheckBoxifiedTextView that holds wraps around an CheckBoxifiedText */
142    public View getView(int position, View convertView, ViewGroup parent ){
143    	return new ExtendedCheckBoxListView(mContext, mItems.get(position));
144    }
145}