| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * 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 com.android.browser; |
| |
| import android.content.Context; |
| import android.view.ContextMenu; |
| import android.view.ContextMenu.ContextMenuInfo; |
| import android.view.KeyEvent; |
| import android.view.MenuInflater; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.view.View.OnCreateContextMenuListener; |
| import android.webkit.WebView; |
| import android.widget.AdapterView; |
| import android.widget.AdapterView.OnItemClickListener; |
| import android.widget.GridView; |
| |
| /** |
| * This class implements a Grid layout of Views for the Tab picker. |
| */ |
| class ImageGrid extends GridView implements OnItemClickListener, |
| OnCreateContextMenuListener { |
| |
| private Listener mListener; |
| private ImageAdapter mAdapter; |
| private boolean mIsLive; |
| private static final int SPACING = 10; |
| public static final int CANCEL = -99; |
| public static final int NEW_TAB = -1; |
| |
| /** |
| * Constructor |
| * @param context Context to use when inflating resources. |
| * @param live TRUE if the view can accept touch or click |
| * @param l Listener to respond to clicks etc. |
| */ |
| public ImageGrid(Context context, boolean live, Listener l) { |
| super(context); |
| |
| mIsLive = live; |
| if (live) { |
| setFocusable(true); |
| setFocusableInTouchMode(true); |
| setOnItemClickListener(this); |
| setOnCreateContextMenuListener(this); |
| } |
| mListener = l; |
| |
| mAdapter = new ImageAdapter(context, this, live); |
| setAdapter(mAdapter); |
| |
| setBackgroundColor(0xFF000000); |
| |
| setVerticalSpacing(SPACING); |
| setHorizontalSpacing(SPACING); |
| setNumColumns(2); |
| setStretchMode(GridView.STRETCH_COLUMN_WIDTH); |
| setSelector(android.R.drawable.gallery_thumb); |
| } |
| |
| @Override |
| public boolean dispatchKeyEvent(KeyEvent event) { |
| // We always consume the BACK key even if mListener is null or the |
| // ImageGrid is not "live." This prevents crashes during tab animations |
| // if the user presses BACK. |
| if ((event.getAction() == KeyEvent.ACTION_DOWN) && |
| (event.getKeyCode() == KeyEvent.KEYCODE_BACK)) { |
| if (mListener != null && mIsLive) { |
| mListener.onClick(CANCEL); |
| invalidate(); |
| } |
| return true; |
| } |
| return super.dispatchKeyEvent(event); |
| } |
| |
| /** |
| * Called by BrowserActivity to add a new window to the tab picker. |
| * This does not happen dynamically, this only happens during view |
| * setup. |
| * |
| * @param v Webview of the tab to add |
| * @param name Web page title |
| * @param url URL of the webpage |
| */ |
| public void add(TabControl.Tab t) { |
| mAdapter.add(t); |
| } |
| |
| /** |
| * Called by BrowserActivity when a window has been removed from the |
| * tab list. |
| * |
| * @param index Window to remove, from 0 to MAX_TABS-1 |
| */ |
| public void remove(int index) { |
| if (Browser.DEBUG && (index < 0 || index >= TabControl.MAX_TABS)) { |
| throw new AssertionError(); |
| } |
| mAdapter.remove(index); |
| } |
| |
| /** |
| * Request focus to initially set to a particular tab. |
| * |
| * @param startingIndex This is a Tab index from 0 - MAX_TABS-1 and does not |
| * include the "New Tab" cell. |
| */ |
| public void setCurrentIndex(int startingIndex) { |
| if (!mAdapter.maxedOut()) { |
| startingIndex++; |
| } |
| setSelection(startingIndex); |
| } |
| |
| public Listener getListener() { |
| return mListener; |
| } |
| |
| public void setListener(Listener l) { |
| mListener = l; |
| } |
| |
| /** |
| * Return true if the ImageGrid is live. This means that tabs can be chosen |
| * and the menu can be invoked. |
| */ |
| public boolean isLive() { |
| return mIsLive; |
| } |
| |
| /** |
| * Do some internal cleanup of the ImageGrid's adapter. |
| */ |
| public void clear() { |
| mAdapter.clear(); |
| } |
| |
| /* (non-Javadoc) |
| * @see android.widget.AdapterView.OnItemClickListener#onItemClick(android.widget.AdapterView, android.view.View, int, long) |
| */ |
| public void onItemClick(AdapterView parent, View v, int position, long id) { |
| if (!mAdapter.maxedOut()) { |
| position--; |
| } |
| // Position will be -1 for the "New Tab" cell. |
| if (mListener != null) { |
| mListener.onClick(position); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see android.view.View.OnCreateContextMenuListener#onCreateContextMenu(android.view.ContextMenu, android.view.View, java.lang.Object) |
| */ |
| public void onCreateContextMenu(ContextMenu menu, View v, |
| ContextMenuInfo menuInfo) { |
| // Do not create the context menu if there is no listener or the Tab |
| // overview is not "live." |
| if (mListener == null || !mIsLive) { |
| return; |
| } |
| AdapterView.AdapterContextMenuInfo info = |
| (AdapterView.AdapterContextMenuInfo) menuInfo; |
| boolean maxed = mAdapter.maxedOut(); |
| if (info.position > 0 || maxed) { |
| MenuInflater inflater = new MenuInflater(mContext); |
| inflater.inflate(R.menu.tabscontext, menu); |
| int position = info.position; |
| if (!maxed) { |
| position--; |
| } |
| menu.setHeaderTitle(mAdapter.mItems.get(position).getTitle()); |
| } |
| } |
| |
| // convert a context menu position to an actual tab position. Since context |
| // menus are not created for the "New Tab" cell, this will always return a |
| // valid tab position. |
| public int getContextMenuPosition(MenuItem menu) { |
| AdapterView.AdapterContextMenuInfo info = |
| (AdapterView.AdapterContextMenuInfo) menu.getMenuInfo(); |
| int pos = info.position; |
| if (!mAdapter.maxedOut()) { |
| pos--; |
| } |
| return pos; |
| } |
| |
| @Override |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| // Called when our orientation changes. Tell the adapter about the new |
| // size. Compute the individual tab height by taking the grid height |
| // and subtracting the SPACING. Then subtract the list padding twice |
| // (once for each tab on screen) and divide the remaining height by 2. |
| int tabHeight = (h - SPACING |
| - 2 * (getListPaddingTop() + getListPaddingBottom())) / 2; |
| mAdapter.heightChanged(tabHeight); |
| super.onSizeChanged(w, h, oldw, oldh); |
| } |
| |
| /** |
| * Listener to be notified by behavior of ImageGrid. |
| */ |
| public interface Listener { |
| /** |
| * Called when enter is pressed on the list. |
| * @param position The index of the selected image when |
| * enter is pressed. |
| */ |
| void onClick(int position); |
| |
| /** |
| * Called when remove is called on the grid. |
| */ |
| void remove(int position); |
| } |
| |
| } |