1 /* 2 * Copyright (C) 2012 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 17 package com.android.gallery3d.filtershow; 18 19 import android.content.Context; 20 import android.graphics.Bitmap; 21 import android.graphics.Color; 22 import android.graphics.drawable.Drawable; 23 import android.view.LayoutInflater; 24 import android.view.MenuItem; 25 import android.view.View; 26 import android.view.ViewGroup; 27 import android.widget.ArrayAdapter; 28 import android.widget.ImageView; 29 import android.widget.TextView; 30 31 import com.android.gallery3d.R; 32 import com.android.gallery3d.filtershow.presets.ImagePreset; 33 34 import java.util.Vector; 35 36 public class HistoryAdapter extends ArrayAdapter<ImagePreset> { 37 private static final String LOGTAG = "HistoryAdapter"; 38 private int mCurrentPresetPosition = 0; 39 private String mBorders = null; 40 private String mCrop = null; 41 private String mRotate = null; 42 private String mStraighten = null; 43 private String mMirror = null; 44 private MenuItem mUndoMenuItem = null; 45 private MenuItem mRedoMenuItem = null; 46 private MenuItem mResetMenuItem = null; 47 48 private Bitmap mOriginalBitmap = null; 49 50 public HistoryAdapter(Context context, int resource, int textViewResourceId) { 51 super(context, resource, textViewResourceId); 52 FilterShowActivity activity = (FilterShowActivity) context; 53 mBorders = context.getString(R.string.borders); 54 mCrop = context.getString(R.string.crop); 55 mRotate = context.getString(R.string.rotate); 56 mStraighten = context.getString(R.string.straighten); 57 mMirror = context.getString(R.string.mirror); 58 } 59 60 public void setMenuItems(MenuItem undoItem, MenuItem redoItem, MenuItem resetItem) { 61 mUndoMenuItem = undoItem; 62 mRedoMenuItem = redoItem; 63 mResetMenuItem = resetItem; 64 updateMenuItems(); 65 } 66 67 public boolean canReset() { 68 if (getCount() <= 1) { 69 return false; 70 } 71 return true; 72 } 73 74 public boolean canUndo() { 75 if (mCurrentPresetPosition == getCount() - 1) { 76 return false; 77 } 78 return true; 79 } 80 81 public boolean canRedo() { 82 if (mCurrentPresetPosition == 0) { 83 return false; 84 } 85 return true; 86 } 87 88 public void updateMenuItems() { 89 if (mUndoMenuItem != null) { 90 setEnabled(mUndoMenuItem, canUndo()); 91 } 92 if (mRedoMenuItem != null) { 93 setEnabled(mRedoMenuItem, canRedo()); 94 } 95 if (mResetMenuItem != null) { 96 setEnabled(mResetMenuItem, canReset()); 97 } 98 } 99 100 private void setEnabled(MenuItem item, boolean enabled) { 101 item.setEnabled(enabled); 102 Drawable drawable = item.getIcon(); 103 if (drawable != null) { 104 drawable.setAlpha(enabled ? 255 : 80); 105 } 106 } 107 108 public void setCurrentPreset(int n) { 109 mCurrentPresetPosition = n; 110 updateMenuItems(); 111 this.notifyDataSetChanged(); 112 } 113 114 public void reset() { 115 if (getCount() == 0) { 116 return; 117 } 118 ImagePreset first = getItem(getCount() - 1); 119 clear(); 120 addHistoryItem(first); 121 updateMenuItems(); 122 } 123 124 public ImagePreset getLast() { 125 if (getCount() == 0) { 126 return null; 127 } 128 return getItem(0); 129 } 130 131 public ImagePreset getCurrent() { 132 return getItem(mCurrentPresetPosition); 133 } 134 135 public void addHistoryItem(ImagePreset preset) { 136 insert(preset, 0); 137 updateMenuItems(); 138 } 139 140 @Override 141 public void insert(ImagePreset preset, int position) { 142 if (mCurrentPresetPosition != 0) { 143 // in this case, let's discount the presets before the current one 144 Vector<ImagePreset> oldItems = new Vector<ImagePreset>(); 145 for (int i = mCurrentPresetPosition; i < getCount(); i++) { 146 oldItems.add(getItem(i)); 147 } 148 clear(); 149 for (int i = 0; i < oldItems.size(); i++) { 150 add(oldItems.elementAt(i)); 151 } 152 mCurrentPresetPosition = position; 153 this.notifyDataSetChanged(); 154 } 155 super.insert(preset, position); 156 mCurrentPresetPosition = position; 157 this.notifyDataSetChanged(); 158 } 159 160 public int redo() { 161 mCurrentPresetPosition--; 162 if (mCurrentPresetPosition < 0) { 163 mCurrentPresetPosition = 0; 164 } 165 this.notifyDataSetChanged(); 166 updateMenuItems(); 167 return mCurrentPresetPosition; 168 } 169 170 public int undo() { 171 mCurrentPresetPosition++; 172 if (mCurrentPresetPosition >= getCount()) { 173 mCurrentPresetPosition = getCount() - 1; 174 } 175 this.notifyDataSetChanged(); 176 updateMenuItems(); 177 return mCurrentPresetPosition; 178 } 179 180 @Override 181 public View getView(int position, View convertView, ViewGroup parent) { 182 View view = convertView; 183 if (view == null) { 184 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 185 Context.LAYOUT_INFLATER_SERVICE); 186 view = inflater.inflate(R.layout.filtershow_history_operation_row, null); 187 } 188 189 ImagePreset item = getItem(position); 190 if (item != null) { 191 TextView itemView = (TextView) view.findViewById(R.id.rowTextView); 192 if (itemView != null) { 193 itemView.setText(item.historyName()); 194 } 195 ImageView preview = (ImageView) view.findViewById(R.id.preview); 196 Bitmap bmp = item.getPreviewImage(); 197 if (position == getCount()-1 && mOriginalBitmap != null) { 198 bmp = mOriginalBitmap; 199 } 200 if (bmp != null) { 201 preview.setImageBitmap(bmp); 202 } else { 203 preview.setImageResource(android.R.color.transparent); 204 } 205 if (position == mCurrentPresetPosition) { 206 view.setBackgroundColor(Color.WHITE); 207 } else { 208 view.setBackgroundResource(R.color.background_main_toolbar); 209 } 210 } 211 212 return view; 213 } 214 215 216 public void setOriginalBitmap(Bitmap originalBitmap) { 217 mOriginalBitmap = originalBitmap; 218 } 219 } 220
