michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.preferences;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.preference.PreferenceCategory;
michael@0: import android.util.AttributeSet;
michael@0: 
michael@0: public abstract class CustomListCategory extends PreferenceCategory {
michael@0:     protected CustomListPreference mDefaultReference;
michael@0: 
michael@0:     public CustomListCategory(Context context) {
michael@0:         super(context);
michael@0:     }
michael@0: 
michael@0:     public CustomListCategory(Context context, AttributeSet attrs) {
michael@0:         super(context, attrs);
michael@0:     }
michael@0: 
michael@0:     public CustomListCategory(Context context, AttributeSet attrs, int defStyle) {
michael@0:         super(context, attrs, defStyle);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onAttachedToActivity() {
michael@0:         super.onAttachedToActivity();
michael@0: 
michael@0:         setOrderingAsAdded(true);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Set the default to some available list item. Used if the current default is removed or
michael@0:      * disabled.
michael@0:      */
michael@0:     protected void setFallbackDefault() {
michael@0:         if (getPreferenceCount() > 0) {
michael@0:             CustomListPreference aItem = (CustomListPreference) getPreference(0);
michael@0:             setDefault(aItem);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Removes the given item from the set of available list items.
michael@0:      * This only updates the UI, so callers are responsible for persisting any state.
michael@0:      *
michael@0:      * @param item The given item to remove.
michael@0:      */
michael@0:     public void uninstall(CustomListPreference item) {
michael@0:         removePreference(item);
michael@0:         if (item == mDefaultReference) {
michael@0:             // If the default is being deleted, set a new default.
michael@0:             setFallbackDefault();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Sets the given item as the current default.
michael@0:      * This only updates the UI, so callers are responsible for persisting any state.
michael@0:      *
michael@0:      * @param item The intended new default.
michael@0:      */
michael@0:     public void setDefault(CustomListPreference item) {
michael@0:         if (mDefaultReference != null) {
michael@0:             mDefaultReference.setIsDefault(false);
michael@0:         }
michael@0: 
michael@0:         item.setIsDefault(true);
michael@0:         mDefaultReference = item;
michael@0:     }
michael@0: }