1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.gallery3d.photoeditor; 18 19import android.content.Context; 20import android.content.res.Configuration; 21import android.util.AttributeSet; 22import android.widget.ViewSwitcher; 23 24import com.android.gallery3d.R; 25 26/** 27 * Action bar that contains buttons such as undo, redo, save, etc. 28 */ 29public class ActionBar extends RestorableView { 30 31 public ActionBar(Context context, AttributeSet attrs) { 32 super(context, attrs); 33 } 34 35 @Override 36 protected int childLayoutId() { 37 return R.layout.photoeditor_actionbar; 38 } 39 40 @Override 41 protected void onLayout(boolean changed, int l, int t, int r, int b) { 42 super.onLayout(changed, l, t, r, b); 43 44 // Show the action-bar title only when there's still room for it; otherwise, hide it. 45 int width = 0; 46 for (int i = 0; i < getChildCount(); i++) { 47 width += getChildAt(i).getWidth(); 48 } 49 findViewById(R.id.action_bar_title).setVisibility(((width > r - l)) ? INVISIBLE: VISIBLE); 50 } 51 52 @Override 53 protected void onFinishInflate() { 54 super.onFinishInflate(); 55 updateButtons(false, false); 56 } 57 58 @Override 59 protected void onConfigurationChanged(Configuration newConfig) { 60 super.onConfigurationChanged(newConfig); 61 showSaveOrShare(); 62 } 63 64 /** 65 * Save/share button may need being switched when undo/save enabled status is changed/restored. 66 */ 67 private void showSaveOrShare() { 68 // Show share-button only after photo is edited and saved; otherwise, show save-button. 69 boolean showShare = findViewById(R.id.undo_button).isEnabled() 70 && !findViewById(R.id.save_button).isEnabled(); 71 ViewSwitcher switcher = (ViewSwitcher) findViewById(R.id.save_share_buttons); 72 int next = switcher.getNextView().getId(); 73 if ((showShare && (next == R.id.share_button)) 74 || (!showShare && (next == R.id.save_button))) { 75 switcher.showNext(); 76 } 77 } 78 79 public void updateButtons(boolean canUndo, boolean canRedo) { 80 setViewEnabled(R.id.undo_button, canUndo); 81 setViewEnabled(R.id.redo_button, canRedo); 82 setViewEnabled(R.id.save_button, canUndo); 83 showSaveOrShare(); 84 } 85 86 public void updateSave(boolean canSave) { 87 setViewEnabled(R.id.save_button, canSave); 88 showSaveOrShare(); 89 } 90 91 public void clickBack() { 92 findViewById(R.id.action_bar_back).performClick(); 93 } 94 95 public void clickSave() { 96 findViewById(R.id.save_button).performClick(); 97 } 98 99 public boolean canSave() { 100 return findViewById(R.id.save_button).isEnabled(); 101 } 102} 103