1 /* 2 * Copyright (C) 2008 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.calculator2; 18 19 import android.app.Activity; 20 import android.content.res.Resources; 21 import android.content.res.TypedArray; 22 import android.os.Bundle; 23 import android.os.Parcelable; 24 import android.support.v4.view.PagerAdapter; 25 import android.support.v4.view.ViewPager; 26 import android.util.Log; 27 import android.view.KeyEvent; 28 import android.view.LayoutInflater; 29 import android.view.Menu; 30 import android.view.MenuItem; 31 import android.view.View; 32 import android.view.View.OnClickListener; 33 import android.view.ViewConfiguration; 34 import android.view.ViewGroup; 35 import android.view.WindowManager; 36 import android.widget.PopupMenu; 37 import android.widget.PopupMenu.OnMenuItemClickListener; 38 39 public class Calculator extends Activity implements PanelSwitcher.Listener, Logic.Listener, 40 OnClickListener, OnMenuItemClickListener { 41 EventListener mListener = new EventListener(); 42 private CalculatorDisplay mDisplay; 43 private Persist mPersist; 44 private History mHistory; 45 private Logic mLogic; 46 private ViewPager mPager; 47 private View mClearButton; 48 private View mBackspaceButton; 49 private View mOverflowMenuButton; 50 51 static final int BASIC_PANEL = 0; 52 static final int ADVANCED_PANEL = 1; 53 54 private static final String LOG_TAG = "Calculator"; 55 private static final boolean DEBUG = false; 56 private static final boolean LOG_ENABLED = false; 57 private static final String STATE_CURRENT_VIEW = "state-current-view"; 58 59 @Override 60 public void onCreate(Bundle state) { 61 super.onCreate(state); 62 63 // Disable IME for this application 64 getWindow().setFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM, 65 WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM); 66 67 setContentView(R.layout.main); 68 mPager = (ViewPager) findViewById(R.id.panelswitch); 69 if (mPager != null) { 70 mPager.setAdapter(new PageAdapter(mPager)); 71 } else { 72 // Single page UI 73 final TypedArray buttons = getResources().obtainTypedArray(R.array.buttons); 74 for (int i = 0; i < buttons.length(); i++) { 75 setOnClickListener(null, buttons.getResourceId(i, 0)); 76 } 77 buttons.recycle(); 78 } 79 80 if (mClearButton == null) { 81 mClearButton = findViewById(R.id.clear); 82 mClearButton.setOnClickListener(mListener); 83 mClearButton.setOnLongClickListener(mListener); 84 } 85 if (mBackspaceButton == null) { 86 mBackspaceButton = findViewById(R.id.del); 87 mBackspaceButton.setOnClickListener(mListener); 88 mBackspaceButton.setOnLongClickListener(mListener); 89 } 90 91 mPersist = new Persist(this); 92 mPersist.load(); 93 94 mHistory = mPersist.history; 95 96 mDisplay = (CalculatorDisplay) findViewById(R.id.display); 97 98 mLogic = new Logic(this, mHistory, mDisplay); 99 mLogic.setListener(this); 100 101 mLogic.setDeleteMode(mPersist.getDeleteMode()); 102 mLogic.setLineLength(mDisplay.getMaxDigits()); 103 104 HistoryAdapter historyAdapter = new HistoryAdapter(this, mHistory, mLogic); 105 mHistory.setObserver(historyAdapter); 106 107 if (mPager != null) { 108 mPager.setCurrentItem(state == null ? 0 : state.getInt(STATE_CURRENT_VIEW, 0)); 109 } 110 111 mListener.setHandler(mLogic, mPager); 112 mDisplay.setOnKeyListener(mListener); 113 114 if (!ViewConfiguration.get(this).hasPermanentMenuKey()) { 115 createFakeMenu(); 116 } 117 118 mLogic.resumeWithHistory(); 119 updateDeleteMode(); 120 } 121 122 private void updateDeleteMode() { 123 if (mLogic.getDeleteMode() == Logic.DELETE_MODE_BACKSPACE) { 124 mClearButton.setVisibility(View.GONE); 125 mBackspaceButton.setVisibility(View.VISIBLE); 126 } else { 127 mClearButton.setVisibility(View.VISIBLE); 128 mBackspaceButton.setVisibility(View.GONE); 129 } 130 } 131 132 void setOnClickListener(View root, int id) { 133 final View target = root != null ? root.findViewById(id) : findViewById(id); 134 target.setOnClickListener(mListener); 135 } 136 137 @Override 138 public boolean onCreateOptionsMenu(Menu menu) { 139 super.onCreateOptionsMenu(menu); 140 getMenuInflater().inflate(R.menu.menu, menu); 141 return true; 142 } 143 144 @Override 145 public boolean onPrepareOptionsMenu(Menu menu) { 146 super.onPrepareOptionsMenu(menu); 147 menu.findItem(R.id.basic).setVisible(!getBasicVisibility()); 148 menu.findItem(R.id.advanced).setVisible(!getAdvancedVisibility()); 149 return true; 150 } 151 152 153 private void createFakeMenu() { 154 mOverflowMenuButton = findViewById(R.id.overflow_menu); 155 if (mOverflowMenuButton != null) { 156 mOverflowMenuButton.setVisibility(View.VISIBLE); 157 mOverflowMenuButton.setOnClickListener(this); 158 } 159 } 160 161 @Override 162 public void onClick(View v) { 163 switch (v.getId()) { 164 case R.id.overflow_menu: 165 PopupMenu menu = constructPopupMenu(); 166 if (menu != null) { 167 menu.show(); 168 } 169 break; 170 } 171 } 172 173 private PopupMenu constructPopupMenu() { 174 final PopupMenu popupMenu = new PopupMenu(this, mOverflowMenuButton); 175 final Menu menu = popupMenu.getMenu(); 176 popupMenu.inflate(R.menu.menu); 177 popupMenu.setOnMenuItemClickListener(this); 178 onPrepareOptionsMenu(menu); 179 return popupMenu; 180 } 181 182 183 @Override 184 public boolean onMenuItemClick(MenuItem item) { 185 return onOptionsItemSelected(item); 186 } 187 188 private boolean getBasicVisibility() { 189 return mPager != null && mPager.getCurrentItem() == BASIC_PANEL; 190 } 191 192 private boolean getAdvancedVisibility() { 193 return mPager != null && mPager.getCurrentItem() == ADVANCED_PANEL; 194 } 195 196 @Override 197 public boolean onOptionsItemSelected(MenuItem item) { 198 switch (item.getItemId()) { 199 case R.id.clear_history: 200 mHistory.clear(); 201 mLogic.onClear(); 202 break; 203 204 case R.id.basic: 205 if (!getBasicVisibility() && mPager != null) { 206 mPager.setCurrentItem(BASIC_PANEL, true); 207 } 208 break; 209 210 case R.id.advanced: 211 if (!getAdvancedVisibility() && mPager != null) { 212 mPager.setCurrentItem(ADVANCED_PANEL, true); 213 } 214 break; 215 } 216 return super.onOptionsItemSelected(item); 217 } 218 219 @Override 220 protected void onSaveInstanceState(Bundle state) { 221 super.onSaveInstanceState(state); 222 if (mPager != null) { 223 state.putInt(STATE_CURRENT_VIEW, mPager.getCurrentItem()); 224 } 225 } 226 227 @Override 228 public void onPause() { 229 super.onPause(); 230 mLogic.updateHistory(); 231 mPersist.setDeleteMode(mLogic.getDeleteMode()); 232 mPersist.save(); 233 } 234 235 @Override 236 public boolean onKeyDown(int keyCode, KeyEvent keyEvent) { 237 if (keyCode == KeyEvent.KEYCODE_BACK && getAdvancedVisibility() 238 && mPager != null) { 239 mPager.setCurrentItem(BASIC_PANEL); 240 return true; 241 } else { 242 return super.onKeyDown(keyCode, keyEvent); 243 } 244 } 245 246 static void log(String message) { 247 if (LOG_ENABLED) { 248 Log.v(LOG_TAG, message); 249 } 250 } 251 252 @Override 253 public void onChange() { 254 invalidateOptionsMenu(); 255 } 256 257 @Override 258 public void onDeleteModeChange() { 259 updateDeleteMode(); 260 } 261 262 class PageAdapter extends PagerAdapter { 263 private View mSimplePage; 264 private View mAdvancedPage; 265 266 public PageAdapter(ViewPager parent) { 267 final LayoutInflater inflater = LayoutInflater.from(parent.getContext()); 268 final View simplePage = inflater.inflate(R.layout.simple_pad, parent, false); 269 final View advancedPage = inflater.inflate(R.layout.advanced_pad, parent, false); 270 mSimplePage = simplePage; 271 mAdvancedPage = advancedPage; 272 273 final Resources res = getResources(); 274 final TypedArray simpleButtons = res.obtainTypedArray(R.array.simple_buttons); 275 for (int i = 0; i < simpleButtons.length(); i++) { 276 setOnClickListener(simplePage, simpleButtons.getResourceId(i, 0)); 277 } 278 simpleButtons.recycle(); 279 280 final TypedArray advancedButtons = res.obtainTypedArray(R.array.advanced_buttons); 281 for (int i = 0; i < advancedButtons.length(); i++) { 282 setOnClickListener(advancedPage, advancedButtons.getResourceId(i, 0)); 283 } 284 advancedButtons.recycle(); 285 286 final View clearButton = simplePage.findViewById(R.id.clear); 287 if (clearButton != null) { 288 mClearButton = clearButton; 289 } 290 291 final View backspaceButton = simplePage.findViewById(R.id.del); 292 if (backspaceButton != null) { 293 mBackspaceButton = backspaceButton; 294 } 295 } 296 297 @Override 298 public int getCount() { 299 return 2; 300 } 301 302 @Override 303 public void startUpdate(View container) { 304 } 305 306 @Override 307 public Object instantiateItem(View container, int position) { 308 final View page = position == 0 ? mSimplePage : mAdvancedPage; 309 ((ViewGroup) container).addView(page); 310 return page; 311 } 312 313 @Override 314 public void destroyItem(View container, int position, Object object) { 315 ((ViewGroup) container).removeView((View) object); 316 } 317 318 @Override 319 public void finishUpdate(View container) { 320 } 321 322 @Override 323 public boolean isViewFromObject(View view, Object object) { 324 return view == object; 325 } 326 327 @Override 328 public Parcelable saveState() { 329 return null; 330 } 331 332 @Override 333 public void restoreState(Parcelable state, ClassLoader loader) { 334 } 335 } 336 } 337
