michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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.home;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: 
michael@0: import org.mozilla.gecko.GeckoAppShell;
michael@0: import org.mozilla.gecko.GeckoEvent;
michael@0: import org.mozilla.gecko.home.PanelLayout.DatasetBacked;
michael@0: import org.mozilla.gecko.home.PanelLayout.FilterManager;
michael@0: import org.mozilla.gecko.widget.GeckoSwipeRefreshLayout;
michael@0: import org.mozilla.gecko.widget.GeckoSwipeRefreshLayout.OnRefreshListener;
michael@0: 
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.database.Cursor;
michael@0: import android.util.Log;
michael@0: import android.view.View;
michael@0: 
michael@0: /**
michael@0:  * Used to wrap a {@code DatasetBacked} ListView or GridView to give the child view swipe-to-refresh
michael@0:  * capabilities.
michael@0:  *
michael@0:  * This view acts as a decorator to forward the {@code DatasetBacked} methods to the child view
michael@0:  * while providing the refresh gesture support on top of it.
michael@0:  */
michael@0: class PanelRefreshLayout extends GeckoSwipeRefreshLayout implements DatasetBacked {
michael@0:     private static final String LOGTAG = "GeckoPanelRefreshLayout";
michael@0: 
michael@0:     private static final String JSON_KEY_PANEL_ID = "panelId";
michael@0:     private static final String JSON_KEY_VIEW_INDEX = "viewIndex";
michael@0: 
michael@0:     private final String panelId;
michael@0:     private final int viewIndex;
michael@0:     private final DatasetBacked datasetBacked;
michael@0: 
michael@0:     /**
michael@0:      * @param context Android context.
michael@0:      * @param childView ListView or GridView. Must implement {@code DatasetBacked}.
michael@0:      * @param panelId The ID from the {@code PanelConfig}.
michael@0:      * @param viewIndex The index from the {@code ViewConfig}.
michael@0:      */
michael@0:     public PanelRefreshLayout(Context context, View childView, String panelId, int viewIndex) {
michael@0:         super(context);
michael@0: 
michael@0:         if (!(childView instanceof DatasetBacked)) {
michael@0:             throw new IllegalArgumentException("View must implement DatasetBacked to be refreshed");
michael@0:         }
michael@0: 
michael@0:         this.panelId = panelId;
michael@0:         this.viewIndex = viewIndex;
michael@0:         this.datasetBacked = (DatasetBacked) childView;
michael@0: 
michael@0:         setOnRefreshListener(new RefreshListener());
michael@0:         addView(childView);
michael@0: 
michael@0:         // Must be called after the child view has been added.
michael@0:         setColorScheme(R.color.swipe_refresh_orange, R.color.swipe_refresh_white,
michael@0:                        R.color.swipe_refresh_orange, R.color.swipe_refresh_white);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void setDataset(Cursor cursor) {
michael@0:         datasetBacked.setDataset(cursor);
michael@0:         setRefreshing(false);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void setFilterManager(FilterManager manager) {
michael@0:         datasetBacked.setFilterManager(manager);
michael@0:     }
michael@0: 
michael@0:     private class RefreshListener implements OnRefreshListener {
michael@0:         @Override
michael@0:         public void onRefresh() {
michael@0:             final JSONObject response = new JSONObject();
michael@0:             try {
michael@0:                 response.put(JSON_KEY_PANEL_ID, panelId);
michael@0:                 response.put(JSON_KEY_VIEW_INDEX, viewIndex);
michael@0:             } catch (JSONException e) {
michael@0:                 Log.e(LOGTAG, "Could not create refresh message", e);
michael@0:                 return;
michael@0:             }
michael@0: 
michael@0:             final GeckoEvent event =
michael@0:                 GeckoEvent.createBroadcastEvent("HomePanels:RefreshView", response.toString());
michael@0:             GeckoAppShell.sendEventToGecko(event);
michael@0:         }
michael@0:     }
michael@0: }