The Tor Browser: mobile/android/base/home/PanelRefreshLayout.java@fc2d59ddac77

     1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 package org.mozilla.gecko.home;

     8 import org.mozilla.gecko.R;

    10 import org.mozilla.gecko.GeckoAppShell;

    11 import org.mozilla.gecko.GeckoEvent;

    12 import org.mozilla.gecko.home.PanelLayout.DatasetBacked;

    13 import org.mozilla.gecko.home.PanelLayout.FilterManager;

    14 import org.mozilla.gecko.widget.GeckoSwipeRefreshLayout;

    15 import org.mozilla.gecko.widget.GeckoSwipeRefreshLayout.OnRefreshListener;

    17 import org.json.JSONException;

    18 import org.json.JSONObject;

    20 import android.content.Context;

    21 import android.database.Cursor;

    22 import android.util.Log;

    23 import android.view.View;

    25 /**

    26  * Used to wrap a {@code DatasetBacked} ListView or GridView to give the child view swipe-to-refresh

    27  * capabilities.

    28  *

    29  * This view acts as a decorator to forward the {@code DatasetBacked} methods to the child view

    30  * while providing the refresh gesture support on top of it.

    31  */

    32 class PanelRefreshLayout extends GeckoSwipeRefreshLayout implements DatasetBacked {

    33     private static final String LOGTAG = "GeckoPanelRefreshLayout";

    35     private static final String JSON_KEY_PANEL_ID = "panelId";

    36     private static final String JSON_KEY_VIEW_INDEX = "viewIndex";

    38     private final String panelId;

    39     private final int viewIndex;

    40     private final DatasetBacked datasetBacked;

    42     /**

    43      * @param context Android context.

    44      * @param childView ListView or GridView. Must implement {@code DatasetBacked}.

    45      * @param panelId The ID from the {@code PanelConfig}.

    46      * @param viewIndex The index from the {@code ViewConfig}.

    47      */

    48     public PanelRefreshLayout(Context context, View childView, String panelId, int viewIndex) {

    49         super(context);

    51         if (!(childView instanceof DatasetBacked)) {

    52             throw new IllegalArgumentException("View must implement DatasetBacked to be refreshed");

    53         }

    55         this.panelId = panelId;

    56         this.viewIndex = viewIndex;

    57         this.datasetBacked = (DatasetBacked) childView;

    59         setOnRefreshListener(new RefreshListener());

    60         addView(childView);

    62         // Must be called after the child view has been added.

    63         setColorScheme(R.color.swipe_refresh_orange, R.color.swipe_refresh_white,

    64                        R.color.swipe_refresh_orange, R.color.swipe_refresh_white);

    65     }

    67     @Override

    68     public void setDataset(Cursor cursor) {

    69         datasetBacked.setDataset(cursor);

    70         setRefreshing(false);

    71     }

    73     @Override

    74     public void setFilterManager(FilterManager manager) {

    75         datasetBacked.setFilterManager(manager);

    76     }

    78     private class RefreshListener implements OnRefreshListener {

    79         @Override

    80         public void onRefresh() {

    81             final JSONObject response = new JSONObject();

    82             try {

    83                 response.put(JSON_KEY_PANEL_ID, panelId);

    84                 response.put(JSON_KEY_VIEW_INDEX, viewIndex);

    85             } catch (JSONException e) {

    86                 Log.e(LOGTAG, "Could not create refresh message", e);

    87                 return;

    88             }

    90             final GeckoEvent event =

    91                 GeckoEvent.createBroadcastEvent("HomePanels:RefreshView", response.toString());

    92             GeckoAppShell.sendEventToGecko(event);

    93         }

    94     }

    95 }

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