examples/builder/examples.cpp

   1 /*
   2  * Copyright (c) 2020 Samsung Electronics Co., Ltd.
   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
  18 //------------------------------------------------------------------------------
  19 //
  20 //
  21 //------------------------------------------------------------------------------
  22
  23 #include <dali-toolkit/dali-toolkit.h>
  24 #include <dali-toolkit/devel-api/builder/builder.h>
  25 #include <dali-toolkit/devel-api/builder/json-parser.h>
  26 #include <dali-toolkit/devel-api/builder/tree-node.h>
  27 #include <dali-toolkit/devel-api/controls/navigation-view/navigation-view.h>
  28 #include <dali-toolkit/devel-api/controls/popup/popup.h>
  29 #include <dali/dali.h>
  30
  31 #include <dirent.h>
  32 #include <stdio.h>
  33 #include <fstream>
  34 #include <iostream>
  35 #include <map>
  36 #include <sstream>
  37 #include <streambuf>
  38 #include <string>
  39
  40 #include <cstring>
  41 #include <ctime>
  42 #include "sys/stat.h"
  43
  44 #include <dali/devel-api/adaptor-framework/file-loader.h>
  45 #include <dali/integration-api/debug.h>
  46 #include "shared/view.h"
  47
  48 #define TOKEN_STRING(x) #x
  49
  50 using namespace Dali;
  51 using namespace Dali::Toolkit;
  52
  53 namespace
  54 {
  55 const char* BACKGROUND_IMAGE("");
  56 const char* TOOLBAR_IMAGE(DEMO_IMAGE_DIR "top-bar.png");
  57 const char* EDIT_IMAGE(DEMO_IMAGE_DIR "icon-change.png");
  58 const char* EDIT_IMAGE_SELECTED(DEMO_IMAGE_DIR "icon-change-selected.png");
  59
  60 std::string USER_DIRECTORY;
  61
  62 std::string JSON_BROKEN(
  63   "                                      \
  64 {                                                              \
  65   'stage':                                                     \
  66   [                                                            \
  67     {                                                          \
  68       'type':'TextLabel',                                      \
  69       'size': [50,50,1],                                       \
  70       'parentOrigin': 'CENTER',                                \
  71       'text':'COULD NOT LOAD JSON FILE'                        \
  72     }                                                          \
  73   ]                                                            \
  74 }                                                              \
  75 ");
  76
  77 std::string ReplaceQuotes(const std::string& single_quoted)
  78 {
  79   std::string s(single_quoted);
  80
  81   // wrong as no embedded quote but had regex link problems
  82   std::replace(s.begin(), s.end(), '\'', '"');
  83
  84   return s;
  85 }
  86
  87 std::string GetFileContents(const std::string& fn)
  88 {
  89   std::streampos     bufferSize = 0;
  90   Dali::Vector<char> fileBuffer;
  91   if(!Dali::FileLoader::ReadFile(fn, bufferSize, fileBuffer, FileLoader::FileType::BINARY))
  92   {
  93     return std::string();
  94   }
  95
  96   return std::string(&fileBuffer[0], bufferSize);
  97 };
  98
  99 typedef std::vector<std::string> FileList;
 100
 101 void DirectoryFileList(const std::string& directory, FileList& files)
 102 {
 103   DIR*           d;
 104   struct dirent* dir;
 105   d = opendir(directory.c_str());
 106   if(d)
 107   {
 108     while((dir = readdir(d)) != NULL)
 109     {
 110       if(dir->d_type == DT_REG)
 111       {
 112         files.push_back(directory + std::string(dir->d_name));
 113       }
 114     }
 115
 116     closedir(d);
 117   }
 118 }
 119
 120 void DirectoryFilesByType(const std::string& dir, const std::string& fileType /* ie "json" */, FileList& files)
 121 {
 122   typedef FileList           Collection;
 123   typedef FileList::iterator Iter;
 124
 125   Collection allFiles;
 126   DirectoryFileList(dir, allFiles);
 127
 128   for(Iter iter = allFiles.begin(); iter != allFiles.end(); ++iter)
 129   {
 130     size_t pos = (*iter).rfind('.');
 131     if(pos != std::string::npos)
 132     {
 133       if((*iter).substr(pos + 1) == fileType)
 134       {
 135         files.push_back((*iter));
 136       }
 137     }
 138   }
 139 }
 140
 141 const std::string ShortName(const std::string& name)
 142 {
 143   size_t pos = name.rfind('/');
 144
 145   if(pos != std::string::npos)
 146   {
 147     pos++;
 148     return name.substr(pos);
 149   }
 150   else
 151   {
 152     return name;
 153   }
 154 }
 155
 156 //------------------------------------------------------------------------------
 157 //
 158 //
 159 //
 160 //------------------------------------------------------------------------------
 161 class FileWatcher
 162 {
 163 public:
 164   FileWatcher(void);
 165   ~FileWatcher(void);
 166   explicit FileWatcher(const std::string& fn)
 167   {
 168     SetFilename(fn);
 169   };
 170
 171   void        SetFilename(const std::string& fn);
 172   std::string GetFilename() const;
 173
 174   bool        FileHasChanged(void);
 175   std::string GetFileContents(void) const
 176   {
 177     return ::GetFileContents(mstringPath);
 178   };
 179
 180 private:
 181   // compiler does
 182   // FileWatcher(const FileWatcher&);
 183   // FileWatcher &operator=(const FileWatcher &);
 184
 185   std::time_t mLastTime;
 186   std::string mstringPath;
 187 };
 188
 189 FileWatcher::FileWatcher(void)
 190 : mLastTime(0)
 191 {
 192 }
 193
 194 bool FileWatcher::FileHasChanged(void)
 195 {
 196   struct stat buf;
 197
 198   if(0 != stat(mstringPath.c_str(), &buf))
 199   {
 200     return false;
 201   }
 202   else
 203   {
 204     if(buf.st_mtime > mLastTime)
 205     {
 206       mLastTime = buf.st_mtime;
 207       return true;
 208     }
 209     else
 210     {
 211       mLastTime = buf.st_mtime;
 212       return false;
 213     }
 214   }
 215
 216   return false;
 217 }
 218
 219 FileWatcher::~FileWatcher()
 220 {
 221 }
 222
 223 void FileWatcher::SetFilename(const std::string& fn)
 224 {
 225   mstringPath = fn;
 226   FileHasChanged(); // update last time
 227 }
 228
 229 std::string FileWatcher::GetFilename(void) const
 230 {
 231   return mstringPath;
 232 }
 233
 234 } // namespace
 235
 236 //------------------------------------------------------------------------------
 237 //
 238 //
 239 //
 240 //------------------------------------------------------------------------------
 241 class ExampleApp : public ConnectionTracker, public Toolkit::ItemFactory
 242 {
 243 public:
 244   ExampleApp(Application& app)
 245   : mApp(app)
 246   {
 247     app.InitSignal().Connect(this, &ExampleApp::Create);
 248   }
 249
 250   ~ExampleApp()
 251   {
 252   }
 253
 254 public:
 255   void SetTitle(const std::string& title)
 256   {
 257     if(!mTitleActor)
 258     {
 259       mTitleActor = DemoHelper::CreateToolBarLabel("");
 260       // Add title to the tool bar.
 261       mToolBar.AddControl(mTitleActor, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarTitlePercentage, Alignment::HORIZONTAL_CENTER);
 262     }
 263
 264     mTitleActor.SetProperty(TextLabel::Property::TEXT, title);
 265   }
 266
 267   bool OnBackButtonPressed(Toolkit::Button button)
 268   {
 269     OnQuitOrBack();
 270     return true;
 271   }
 272
 273   void SetUpItemView()
 274   {
 275     Window window = mApp.GetWindow();
 276
 277     mTapDetector = TapGestureDetector::New();
 278     mTapDetector.DetectedSignal().Connect(this, &ExampleApp::OnTap);
 279
 280     mFiles.clear();
 281
 282     mItemView = ItemView::New(*this);
 283
 284     mItemView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 285     mItemView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
 286     mLayout = DefaultItemLayout::New(DefaultItemLayout::LIST);
 287
 288     mLayout->SetItemSize(Vector3(window.GetSize().GetWidth(), 50, 1));
 289
 290     mItemView.AddLayout(*mLayout);
 291
 292     mItemView.SetProperty(Actor::Property::KEYBOARD_FOCUSABLE, true);
 293
 294     mFiles.clear();
 295     FileList files;
 296
 297     if(USER_DIRECTORY.size())
 298     {
 299       DirectoryFilesByType(USER_DIRECTORY, "json", files);
 300     }
 301     else
 302     {
 303       DirectoryFilesByType(DEMO_SCRIPT_DIR, "json", files);
 304     }
 305
 306     std::sort(files.begin(), files.end());
 307
 308     ItemId itemId = 0;
 309     for(FileList::iterator iter = files.begin(); iter != files.end(); ++iter)
 310     {
 311       JsonParser parser = JsonParser::New();
 312
 313       std::string data(GetFileContents(*iter));
 314
 315       parser.Parse(data);
 316
 317       if(parser.ParseError())
 318       {
 319         std::cout << "Parser Error:" << *iter << std::endl;
 320         std::cout << parser.GetErrorLineNumber() << "(" << parser.GetErrorColumn() << "):" << parser.GetErrorDescription() << std::endl;
 321         exit(1);
 322       }
 323
 324       if(parser.GetRoot())
 325       {
 326         if(const TreeNode* node = parser.GetRoot()->Find("stage"))
 327         {
 328           // only those with a stage section
 329           if(node->Size())
 330           {
 331             mFiles.push_back(*iter);
 332
 333             mItemView.InsertItem(Item(itemId,
 334                                       MenuItem(ShortName(*iter))),
 335                                  0.5f);
 336
 337             itemId++;
 338           }
 339           else
 340           {
 341             std::cout << "Ignored file (stage has no nodes?):" << *iter << std::endl;
 342           }
 343         }
 344         else
 345         {
 346           std::cout << "Ignored file (no stage section):" << *iter << std::endl;
 347         }
 348       }
 349     }
 350
 351     // Activate the layout
 352     Vector3 size(window.GetSize());
 353     mItemView.ActivateLayout(0, size, 0.0f /*immediate*/);
 354   }
 355
 356   void OnTap(Actor actor, const TapGesture& tap)
 357   {
 358     ItemId id = mItemView.GetItemId(actor);
 359
 360     LoadFromFileList(id);
 361   }
 362
 363   Actor MenuItem(const std::string& text)
 364   {
 365     TextLabel label = TextLabel::New(ShortName(text));
 366     label.SetStyleName("BuilderLabel");
 367     label.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
 368
 369     // Hook up tap detector
 370     mTapDetector.Attach(label);
 371
 372     return label;
 373   }
 374
 375   bool OnTimer()
 376   {
 377     if(mFileWatcher.FileHasChanged())
 378     {
 379       LoadFromFile(mFileWatcher.GetFilename());
 380     }
 381
 382     return true;
 383   }
 384
 385   void ReloadJsonFile(const std::string& filename, Builder& builder, Layer& layer)
 386   {
 387     Window window = mApp.GetWindow();
 388
 389     builder = Builder::New();
 390     builder.QuitSignal().Connect(this, &ExampleApp::OnQuitOrBack);
 391
 392     Property::Map defaultDirs;
 393     defaultDirs[TOKEN_STRING(DEMO_IMAGE_DIR)]  = DEMO_IMAGE_DIR;
 394     defaultDirs[TOKEN_STRING(DEMO_MODEL_DIR)]  = DEMO_MODEL_DIR;
 395     defaultDirs[TOKEN_STRING(DEMO_SCRIPT_DIR)] = DEMO_SCRIPT_DIR;
 396
 397     builder.AddConstants(defaultDirs);
 398
 399     // render tasks may have been setup last load so remove them
 400     RenderTaskList taskList = window.GetRenderTaskList();
 401     if(taskList.GetTaskCount() > 1)
 402     {
 403       typedef std::vector<RenderTask> Collection;
 404       typedef Collection::iterator    ColIter;
 405       Collection                      tasks;
 406
 407       for(unsigned int i = 1; i < taskList.GetTaskCount(); ++i)
 408       {
 409         tasks.push_back(taskList.GetTask(i));
 410       }
 411
 412       for(ColIter iter = tasks.begin(); iter != tasks.end(); ++iter)
 413       {
 414         taskList.RemoveTask(*iter);
 415       }
 416
 417       RenderTask defaultTask = taskList.GetTask(0);
 418       defaultTask.SetSourceActor(window.GetRootLayer());
 419       defaultTask.SetFrameBuffer(FrameBuffer());
 420     }
 421
 422     unsigned int numChildren = layer.GetChildCount();
 423
 424     for(unsigned int i = 0; i < numChildren; ++i)
 425     {
 426       layer.Remove(layer.GetChildAt(0));
 427     }
 428
 429     std::string data(GetFileContents(filename));
 430
 431     try
 432     {
 433       builder.LoadFromString(data);
 434     }
 435     catch(...)
 436     {
 437       builder.LoadFromString(ReplaceQuotes(JSON_BROKEN));
 438     }
 439
 440     builder.AddActors(layer);
 441   }
 442
 443   void LoadFromFileList(size_t index)
 444   {
 445     if(index < mFiles.size())
 446     {
 447       const std::string& name = mFiles[index];
 448       mFileWatcher.SetFilename(name);
 449       LoadFromFile(name);
 450     }
 451   }
 452
 453   void LoadFromFile(const std::string& name)
 454   {
 455     ReloadJsonFile(name, mBuilder, mBuilderLayer);
 456
 457     mBuilderLayer.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER);
 458     mBuilderLayer.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER);
 459     Dali::Vector3 size = mApp.GetWindow().GetRootLayer().GetCurrentProperty<Vector3>(Actor::Property::SIZE);
 460     size.y -= DemoHelper::DEFAULT_VIEW_STYLE.mToolBarHeight;
 461     mBuilderLayer.SetProperty(Actor::Property::SIZE, size);
 462
 463     mNavigationView.Push(mBuilderLayer);
 464   }
 465
 466   void Create(Application& app)
 467   {
 468     Window window = app.GetWindow();
 469
 470     window.KeyEventSignal().Connect(this, &ExampleApp::OnKeyEvent);
 471
 472     Layer contents = DemoHelper::CreateView(app,
 473                                             mView,
 474                                             mToolBar,
 475                                             BACKGROUND_IMAGE,
 476                                             TOOLBAR_IMAGE,
 477                                             "");
 478
 479     SetTitle("Select Example");
 480
 481     mBuilderLayer = Layer::New();
 482
 483     // Create an edit mode button. (left of toolbar)
 484     Toolkit::PushButton backButton = Toolkit::PushButton::New();
 485     backButton.SetProperty(Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EDIT_IMAGE);
 486     backButton.SetProperty(Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EDIT_IMAGE_SELECTED);
 487     backButton.ClickedSignal().Connect(this, &ExampleApp::OnBackButtonPressed);
 488     backButton.SetProperty(Actor::Property::LEAVE_REQUIRED, true);
 489     mToolBar.AddControl(backButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HORIZONTAL_LEFT, DemoHelper::DEFAULT_MODE_SWITCH_PADDING);
 490
 491     mNavigationView = Toolkit::NavigationView::New();
 492     mNavigationView.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
 493     mNavigationView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 494
 495     window.Add(mNavigationView);
 496
 497     // Set up the background gradient.
 498     Property::Array stopOffsets;
 499     stopOffsets.PushBack(0.0f);
 500     stopOffsets.PushBack(1.0f);
 501     Property::Array stopColors;
 502     stopColors.PushBack(Color::WHITE);
 503     stopColors.PushBack(Vector4(0.45f, 0.70f, 0.80f, 1.0f)); // Medium bright, pastel blue
 504     const float percentageWindowHeight = window.GetSize().GetHeight() * 0.6f;
 505
 506     mNavigationView.SetProperty(Toolkit::Control::Property::BACKGROUND, Dali::Property::Map().Add(Toolkit::Visual::Property::TYPE, Dali::Toolkit::Visual::GRADIENT).Add(Toolkit::GradientVisual::Property::STOP_OFFSET, stopOffsets).Add(Toolkit::GradientVisual::Property::STOP_COLOR, stopColors).Add(Toolkit::GradientVisual::Property::START_POSITION, Vector2(0.0f, -percentageWindowHeight)).Add(Toolkit::GradientVisual::Property::END_POSITION, Vector2(0.0f, percentageWindowHeight)).Add(Toolkit::GradientVisual::Property::UNITS, Toolkit::GradientVisual::Units::USER_SPACE));
 507
 508     SetUpItemView();
 509     mNavigationView.Push(mItemView);
 510
 511     mTimer = Timer::New(500); // ms
 512     mTimer.TickSignal().Connect(this, &ExampleApp::OnTimer);
 513     mTimer.Start();
 514
 515   } // Create(app)
 516
 517   virtual unsigned int GetNumberOfItems()
 518   {
 519     return mFiles.size();
 520   }
 521
 522   virtual Actor NewItem(unsigned int itemId)
 523   {
 524     DALI_ASSERT_DEBUG(itemId < mFiles.size());
 525     return MenuItem(ShortName(mFiles[itemId]));
 526   }
 527
 528   /**
 529    * Main key event handler
 530    */
 531   void OnKeyEvent(const KeyEvent& event)
 532   {
 533     if(event.GetState() == KeyEvent::DOWN)
 534     {
 535       if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
 536       {
 537         OnQuitOrBack();
 538       }
 539     }
 540   }
 541
 542   /**
 543    * Event handler when Builder wants to quit (we only want to close the shown json unless we're at the top-level)
 544    */
 545   void OnQuitOrBack()
 546   {
 547     if(mItemView.GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 548     {
 549       mApp.Quit();
 550     }
 551     else
 552     {
 553       mNavigationView.Pop();
 554     }
 555   }
 556
 557 private:
 558   Application& mApp;
 559
 560   ItemLayoutPtr           mLayout;
 561   ItemView                mItemView;
 562   Toolkit::NavigationView mNavigationView;
 563
 564   Toolkit::Control mView;
 565
 566   Toolkit::ToolBar mToolBar;
 567   TextLabel        mTitleActor;
 568
 569   Layer mBuilderLayer;
 570
 571   TapGestureDetector mTapDetector;
 572
 573   // builder
 574   Builder mBuilder;
 575
 576   FileList mFiles;
 577
 578   FileWatcher mFileWatcher;
 579   Timer       mTimer;
 580 };
 581
 582 //------------------------------------------------------------------------------
 583 //
 584 //
 585 //
 586 //------------------------------------------------------------------------------
 587 int DALI_EXPORT_API main(int argc, char** argv)
 588 {
 589   if(argc > 2)
 590   {
 591     if(strcmp(argv[1], "-f") == 0)
 592     {
 593       USER_DIRECTORY = argv[2];
 594     }
 595   }
 596
 597   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 598
 599   ExampleApp dali_app(app);
 600
 601   app.MainLoop();
 602
 603   return 0;
 604 }