Java tutorial
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla Android code. * * The Initial Developer of the Original Code is Mozilla Foundation. * Portions created by the Initial Developer are Copyright (C) 2011 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Margaret Leibovic <margaret.leibovic@gmail.com> * Sriram Ramasubramanian <sriram@mozilla.com> * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ package org.mozilla.gecko; import org.mozilla.fennec_satyanarayan.R; import org.mozilla.gecko.gfx.FloatSize; import android.content.Context; import android.util.Log; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.view.View; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.ArrayAdapter; import android.widget.AdapterView; import android.widget.RelativeLayout; import android.widget.ListView; import android.widget.TextView; import org.json.JSONArray; import org.json.JSONException; public class AutoCompletePopup extends ListView { private Context mContext; private RelativeLayout.LayoutParams mLayout; private int mWidth; private int mHeight; private Animation mAnimation; private static final String LOGTAG = "AutoCompletePopup"; private static int sMinWidth = 0; private static int sRowHeight = 0; private static final int AUTOCOMPLETE_MIN_WIDTH_IN_DPI = 200; private static final int AUTOCOMPLETE_ROW_HEIGHT_IN_DPI = 32; public AutoCompletePopup(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; mAnimation = AnimationUtils.loadAnimation(context, R.anim.grow_fade_in); mAnimation.setDuration(75); setFocusable(false); setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parentView, View view, int position, long id) { String value = ((TextView) view).getText().toString(); GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("FormAssist:AutoComplete", value)); hide(); } }); } public void show(JSONArray suggestions, JSONArray rect, double zoom) { ArrayAdapter<String> adapter = new ArrayAdapter<String>(mContext, R.layout.autocomplete_list_item); for (int i = 0; i < suggestions.length(); i++) { try { adapter.add(suggestions.get(i).toString()); } catch (JSONException e) { Log.i(LOGTAG, "JSONException: " + e); } } setAdapter(adapter); if (!isShown()) { setVisibility(View.VISIBLE); startAnimation(mAnimation); } if (mLayout == null) { mLayout = (RelativeLayout.LayoutParams) getLayoutParams(); mWidth = mLayout.width; mHeight = mLayout.height; } int left = 0; int top = 0; int width = 0; int height = 0; try { left = (int) (rect.getDouble(0) * zoom); top = (int) (rect.getDouble(1) * zoom); width = (int) (rect.getDouble(2) * zoom); height = (int) (rect.getDouble(3) * zoom); } catch (JSONException e) { } int listWidth = mWidth; int listHeight = mHeight; int listLeft = left < 0 ? 0 : left; int listTop = top + height; FloatSize viewport = GeckoApp.mAppContext.getLayerController().getViewportSize(); // Late initializing variable to allow DisplayMetrics not to be null and avoid NPE if (sMinWidth == 0) { DisplayMetrics metrics = new DisplayMetrics(); GeckoApp.mAppContext.getWindowManager().getDefaultDisplay().getMetrics(metrics); sMinWidth = (int) (AUTOCOMPLETE_MIN_WIDTH_IN_DPI * metrics.density); sRowHeight = (int) (AUTOCOMPLETE_ROW_HEIGHT_IN_DPI * metrics.density); } // If the textbox is smaller than the screen-width, // shrink the list's width if ((left + width) < viewport.width) listWidth = left < 0 ? left + width : width; // listWidth can be negative if it is a constant - FILL_PARENT or MATCH_PARENT if (listWidth >= 0 && listWidth < sMinWidth) { listWidth = sMinWidth; if ((listLeft + listWidth) > viewport.width) listLeft = (int) (viewport.width - listWidth); } listHeight = sRowHeight * adapter.getCount(); // The text box doesnt fit below if ((listTop + listHeight) > viewport.height) { // Find where the maximum space is, and fit it there if ((viewport.height - listTop) > top) { // Shrink the height to fit it below the text-box listHeight = (int) (viewport.height - listTop); } else { if (listHeight < top) { // No shrinking needed to fit on top listTop = (top - listHeight); } else { // Shrink to available space on top listTop = 0; listHeight = top; } } } mLayout = new RelativeLayout.LayoutParams(listWidth, listHeight); mLayout.setMargins(listLeft, listTop, 0, 0); setLayoutParams(mLayout); requestLayout(); } public void hide() { if (isShown()) { setVisibility(View.GONE); GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("FormAssist:Closed", null)); } } }