NotesListAdapter.java

    /*
     * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
     *
     * 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 net.micode.notes.ui;

    import android.content.Context;
    import android.database.Cursor;
    import android.util.Log;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.CursorAdapter;

    import net.micode.notes.data.Notes;

    import java.util.Collection;
    import java.util.HashMap;
    import java.util.HashSet;
    import java.util.Iterator;

    public class NotesListAdapter extends CursorAdapter {
        private static final String TAG = "NotesListAdapter";
        private Context mContext;
        private HashMap<Integer, Boolean> mSelectedIndex;
        private int mNotesCount;
        private boolean mChoiceMode;

        public static class AppWidgetAttribute {
            public int widgetId;
            public int widgetType;
        };

        public NotesListAdapter(Context context) {
            super(context, null);
            mSelectedIndex = new HashMap<Integer, Boolean>();
            mContext = context;
            mNotesCount = 0;
        }

        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            return new NotesListItem(context);
        }

        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            if (view instanceof NotesListItem) {
                NoteItemData itemData = new NoteItemData(context, cursor);
                ((NotesListItem) view).bind(context, itemData, mChoiceMode,
                        isSelectedItem(cursor.getPosition()));
            }
        }

        public void setCheckedItem(final int position, final boolean checked) {
            mSelectedIndex.put(position, checked);
            notifyDataSetChanged();
        }

        public boolean isInChoiceMode() {
            return mChoiceMode;
        }

        public void setChoiceMode(boolean mode) {
            mSelectedIndex.clear();
            mChoiceMode = mode;
        }

        public void selectAll(boolean checked) {
            Cursor cursor = getCursor();
            for (int i = 0; i < getCount(); i++) {
                if (cursor.moveToPosition(i)) {
                    if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) {
                        setCheckedItem(i, checked);
                    }
                }
            }
        }

        public HashSet<Long> getSelectedItemIds() {
            HashSet<Long> itemSet = new HashSet<Long>();
            for (Integer position : mSelectedIndex.keySet()) {
                if (mSelectedIndex.get(position) == true) {
                    Long id = getItemId(position);
                    if (id == Notes.ID_ROOT_FOLDER) {
                        Log.d(TAG, "Wrong item id, should not happen");
                    } else {
                        itemSet.add(id);
                    }
                }
            }

            return itemSet;
        }

        public HashSet<AppWidgetAttribute> getSelectedWidget() {
            HashSet<AppWidgetAttribute> itemSet = new HashSet<AppWidgetAttribute>();
            for (Integer position : mSelectedIndex.keySet()) {
                if (mSelectedIndex.get(position) == true) {
                    Cursor c = (Cursor) getItem(position);
                    if (c != null) {
                        AppWidgetAttribute widget = new AppWidgetAttribute();
                        NoteItemData item = new NoteItemData(mContext, c);
                        widget.widgetId = item.getWidgetId();
                        widget.widgetType = item.getWidgetType();
                        itemSet.add(widget);
                        /**
                         * Don't close cursor here, only the adapter could close it
                         */
                    } else {
                        Log.e(TAG, "Invalid cursor");
                        return null;
                    }
                }
            }
            return itemSet;
        }

        public int getSelectedCount() {
            Collection<Boolean> values = mSelectedIndex.values();
            if (null == values) {
                return 0;
            }
            Iterator<Boolean> iter = values.iterator();
            int count = 0;
            while (iter.hasNext()) {
                if (true == iter.next()) {
                    count++;
                }
            }
            return count;
        }

        public boolean isAllSelected() {
            int checkedCount = getSelectedCount();
            return (checkedCount != 0 && checkedCount == mNotesCount);
        }

        public boolean isSelectedItem(final int position) {
            if (null == mSelectedIndex.get(position)) {
                return false;
            }
            return mSelectedIndex.get(position);
        }

        @Override
        protected void onContentChanged() {
            super.onContentChanged();
            calcNotesCount();
        }

        @Override
        public void changeCursor(Cursor cursor) {
            super.changeCursor(cursor);
            calcNotesCount();
        }

        private void calcNotesCount() {
            mNotesCount = 0;
            for (int i = 0; i < getCount(); i++) {
                Cursor c = (Cursor) getItem(i);
                if (c != null) {
                    if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) {
                        mNotesCount++;
                    }
                } else {
                    Log.e(TAG, "Invalid cursor");
                    return;
                }
            }
        }
    }