examples/builder/examples.cpp

   1 /*
   2  * Copyright (c) 2023 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   : mLastTime(0),
 168     mstringPath{}
 169   {
 170     SetFilename(fn);
 171   };
 172
 173   void        SetFilename(const std::string& fn);
 174   std::string GetFilename() const;
 175
 176   bool        FileHasChanged(void);
 177   std::string GetFileContents(void) const
 178   {
 179     return ::GetFileContents(mstringPath);
 180   };
 181
 182 private:
 183   // compiler does
 184   // FileWatcher(const FileWatcher&);
 185   // FileWatcher &operator=(const FileWatcher &);
 186
 187   std::time_t mLastTime;
 188   std::string mstringPath;
 189 };
 190
 191 FileWatcher::FileWatcher(void)
 192 : mLastTime(0),
 193   mstringPath{}
 194 {
 195 }
 196
 197 bool FileWatcher::FileHasChanged(void)
 198 {
 199   struct stat buf;
 200
 201   if(0 != stat(mstringPath.c_str(), &buf))
 202   {
 203     return false;
 204   }
 205   else
 206   {
 207     const bool result = buf.st_mtime > mLastTime;
 208     mLastTime         = std::time_t(buf.st_mtime);
 209     return result;
 210   }
 211
 212   return false;
 213 }
 214
 215 FileWatcher::~FileWatcher()
 216 {
 217 }
 218
 219 void FileWatcher::SetFilename(const std::string& fn)
 220 {
 221   mstringPath = fn;
 222   FileHasChanged(); // update last time
 223 }
 224
 225 std::string FileWatcher::GetFilename(void) const
 226 {
 227   return mstringPath;
 228 }
 229
 230 } // namespace
 231
 232 //------------------------------------------------------------------------------
 233 //
 234 //
 235 //
 236 //------------------------------------------------------------------------------
 237 class ExampleApp : public ConnectionTracker, public Toolkit::ItemFactory
 238 {
 239 public:
 240   ExampleApp(Application& app)
 241   : mApp(app)
 242   {
 243     app.InitSignal().Connect(this, &ExampleApp::Create);
 244   }
 245
 246   ~ExampleApp()
 247   {
 248   }
 249
 250 public:
 251   void SetTitle(const std::string& title)
 252   {
 253     if(!mTitleActor)
 254     {
 255       mTitleActor = DemoHelper::CreateToolBarLabel("");
 256       // Add title to the tool bar.
 257       mToolBar.AddControl(mTitleActor, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarTitlePercentage, Alignment::HORIZONTAL_CENTER);
 258     }
 259
 260     mTitleActor.SetProperty(TextLabel::Property::TEXT, title);
 261   }
 262
 263   bool OnBackButtonPressed(Toolkit::Button button)
 264   {
 265     OnQuitOrBack();
 266     return true;
 267   }
 268
 269   void SetUpItemView()
 270   {
 271     Window window = mApp.GetWindow();
 272
 273     mTapDetector = TapGestureDetector::New();
 274     mTapDetector.DetectedSignal().Connect(this, &ExampleApp::OnTap);
 275
 276     mFiles.clear();
 277
 278     mItemView = ItemView::New(*this);
 279
 280     mItemView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
 281     mItemView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
 282     mLayout = DefaultItemLayout::New(DefaultItemLayout::LIST);
 283
 284     mLayout->SetItemSize(Vector3(window.GetSize().GetWidth(), 50, 1));
 285
 286     mItemView.AddLayout(*mLayout);
 287
 288     mItemView.SetProperty(Actor::Property::KEYBOARD_FOCUSABLE, true);
 289
 290     mFiles.clear();
 291     FileList files;
 292
 293     if(USER_DIRECTORY.size())
 294     {
 295       DirectoryFilesByType(USER_DIRECTORY, "json", files);
 296     }
 297     else
 298     {
 299       DirectoryFilesByType(DEMO_SCRIPT_DIR, "json", files);
 300     }
 301
 302     std::sort(files.begin(), files.end());
 303
 304     for(FileList::iterator iter = files.begin(); iter != files.end(); ++iter)
 305     {
 306       JsonParser parser = JsonParser::New();
 307
 308       std::string data(GetFileContents(*iter));
 309
 310       parser.Parse(data);
 311
 312       if(parser.ParseError())
 313       {
 314         std::cout << "Parser Error:" << *iter << std::endl;
 315         std::cout << parser.GetErrorLineNumber() << "(" << parser.GetErrorColumn() << "):" << parser.GetErrorDescription() << std::endl;
 316         exit(1);
 317       }
 318
 319       if(parser.GetRoot())
 320       {
 321         if(const TreeNode* node = parser.GetRoot()->Find("stage"))
 322         {
 323           // only those with a stage section
 324           if(node->Size())
 325           {
 326             mFiles.push_back(*iter);
 327           }
 328           else
 329           {
 330             std::cout << "Ignored file (stage has no nodes?):" << *iter << std::endl;
 331           }
 332         }
 333         else
 334         {
 335           std::cout << "Ignored file (no stage section):" << *iter << std::endl;
 336         }
 337       }
 338     }
 339
 340     // Activate the layout
 341     Vector3 size(window.GetSize());
 342     mItemView.ActivateLayout(0, size, 0.0f /*immediate*/);
 343   }
 344
 345   void OnTap(Actor actor, const TapGesture& tap)
 346   {
 347     ItemId id = mItemView.GetItemId(actor);
 348
 349     LoadFromFileList(id);
 350   }
 351
 352   Actor MenuItem(const std::string& text)
 353   {
 354     TextLabel label = TextLabel::New(ShortName(text));
 355     label.SetStyleName("BuilderLabel");
 356     label.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
 357
 358     // Hook up tap detector
 359     mTapDetector.Attach(label);
 360
 361     return label;
 362   }
 363
 364   bool OnTimer()
 365   {
 366     if(mFileWatcher.FileHasChanged())
 367     {
 368       LoadFromFile(mFileWatcher.GetFilename());
 369     }
 370
 371     return true;
 372   }
 373
 374   void ReloadJsonFile(const std::string& filename, Builder& builder, Layer& layer)
 375   {
 376     Window window = mApp.GetWindow();
 377
 378     builder = Builder::New();
 379     builder.QuitSignal().Connect(this, &ExampleApp::OnQuitOrBack);
 380
 381     Property::Map defaultDirs;
 382     defaultDirs[TOKEN_STRING(DEMO_IMAGE_DIR)]  = DEMO_IMAGE_DIR;
 383     defaultDirs[TOKEN_STRING(DEMO_MODEL_DIR)]  = DEMO_MODEL_DIR;
 384     defaultDirs[TOKEN_STRING(DEMO_SCRIPT_DIR)] = DEMO_SCRIPT_DIR;
 385
 386     builder.AddConstants(defaultDirs);
 387
 388     // render tasks may have been setup last load so remove them
 389     RenderTaskList taskList = window.GetRenderTaskList();
 390     if(taskList.GetTaskCount() > 1)
 391     {
 392       typedef std::vector<RenderTask> Collection;
 393       typedef Collection::iterator    ColIter;
 394       Collection                      tasks;
 395
 396       for(unsigned int i = 1; i < taskList.GetTaskCount(); ++i)
 397       {
 398         tasks.push_back(taskList.GetTask(i));
 399       }
 400
 401       for(ColIter iter = tasks.begin(); iter != tasks.end(); ++iter)
 402       {
 403         taskList.RemoveTask(*iter);
 404       }
 405
 406       RenderTask defaultTask = taskList.GetTask(0);
 407       defaultTask.SetSourceActor(window.GetRootLayer());
 408       defaultTask.SetFrameBuffer(FrameBuffer());
 409     }
 410
 411     unsigned int numChildren = layer.GetChildCount();
 412
 413     for(unsigned int i = 0; i < numChildren; ++i)
 414     {
 415       layer.Remove(layer.GetChildAt(0));
 416     }
 417
 418     std::string data(GetFileContents(filename));
 419
 420     try
 421     {
 422       builder.LoadFromString(data);
 423     }
 424     catch(...)
 425     {
 426       builder.LoadFromString(ReplaceQuotes(JSON_BROKEN));
 427     }
 428
 429     builder.AddActors(layer);
 430   }
 431
 432   void LoadFromFileList(size_t index)
 433   {
 434     if(index < mFiles.size())
 435     {
 436       const std::string& name = mFiles[index];
 437       mFileWatcher.SetFilename(name);
 438       LoadFromFile(name);
 439     }
 440   }
 441
 442   void LoadFromFile(const std::string& name)
 443   {
 444     ReloadJsonFile(name, mBuilder, mBuilderLayer);
 445
 446     mBuilderLayer.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER);
 447     mBuilderLayer.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER);
 448     Dali::Vector3 size = mApp.GetWindow().GetRootLayer().GetCurrentProperty<Vector3>(Actor::Property::SIZE);
 449     size.y -= DemoHelper::DEFAULT_VIEW_STYLE.mToolBarHeight;
 450     mBuilderLayer.SetProperty(Actor::Property::SIZE, size);
 451
 452     mNavigationView.Push(mBuilderLayer);
 453   }
 454
 455   void Create(Application& app)
 456   {
 457     Window window = app.GetWindow();
 458
 459     window.KeyEventSignal().Connect(this, &ExampleApp::OnKeyEvent);
 460
 461     Layer contents = DemoHelper::CreateView(app,
 462                                             mView,
 463                                             mToolBar,
 464                                             BACKGROUND_IMAGE,
 465                                             TOOLBAR_IMAGE,
 466                                             "");
 467
 468     SetTitle("Select Example");
 469
 470     mBuilderLayer = Layer::New();
 471
 472     // Create an edit mode button. (left of toolbar)
 473     Toolkit::PushButton backButton = Toolkit::PushButton::New();
 474     backButton.SetProperty(Toolkit::Button::Property::UNSELECTED_BACKGROUND_VISUAL, EDIT_IMAGE);
 475     backButton.SetProperty(Toolkit::Button::Property::SELECTED_BACKGROUND_VISUAL, EDIT_IMAGE_SELECTED);
 476     backButton.ClickedSignal().Connect(this, &ExampleApp::OnBackButtonPressed);
 477     backButton.SetProperty(Actor::Property::LEAVE_REQUIRED, true);
 478     mToolBar.AddControl(backButton, DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage, Toolkit::Alignment::HORIZONTAL_LEFT, DemoHelper::DEFAULT_MODE_SWITCH_PADDING);
 479
 480     mNavigationView = Toolkit::NavigationView::New();
 481     mNavigationView.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
 482     mNavigationView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
 483
 484     window.Add(mNavigationView);
 485
 486     // Set up the background gradient.
 487     Property::Array stopOffsets;
 488     stopOffsets.PushBack(0.0f);
 489     stopOffsets.PushBack(1.0f);
 490     Property::Array stopColors;
 491     stopColors.PushBack(Color::WHITE);
 492     stopColors.PushBack(Vector4(0.45f, 0.70f, 0.80f, 1.0f)); // Medium bright, pastel blue
 493     const float percentageWindowHeight = window.GetSize().GetHeight() * 0.6f;
 494
 495     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));
 496
 497     SetUpItemView();
 498     mNavigationView.Push(mItemView);
 499
 500     mTimer = Timer::New(500); // ms
 501     mTimer.TickSignal().Connect(this, &ExampleApp::OnTimer);
 502     mTimer.Start();
 503
 504   } // Create(app)
 505
 506   virtual unsigned int GetNumberOfItems()
 507   {
 508     return mFiles.size();
 509   }
 510
 511   virtual Actor NewItem(unsigned int itemId)
 512   {
 513     DALI_ASSERT_DEBUG(itemId < mFiles.size());
 514     return MenuItem(ShortName(mFiles[itemId]));
 515   }
 516
 517   /**
 518    * Main key event handler
 519    */
 520   void OnKeyEvent(const KeyEvent& event)
 521   {
 522     if(event.GetState() == KeyEvent::DOWN)
 523     {
 524       if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
 525       {
 526         OnQuitOrBack();
 527       }
 528     }
 529   }
 530
 531   /**
 532    * Event handler when Builder wants to quit (we only want to close the shown json unless we're at the top-level)
 533    */
 534   void OnQuitOrBack()
 535   {
 536     if(mItemView.GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 537     {
 538       mApp.Quit();
 539     }
 540     else
 541     {
 542       mNavigationView.Pop();
 543     }
 544   }
 545
 546 private:
 547   Application& mApp;
 548
 549   ItemLayoutPtr           mLayout;
 550   ItemView                mItemView;
 551   Toolkit::NavigationView mNavigationView;
 552
 553   Toolkit::Control mView;
 554
 555   Toolkit::ToolBar mToolBar;
 556   TextLabel        mTitleActor;
 557
 558   Layer mBuilderLayer;
 559
 560   TapGestureDetector mTapDetector;
 561
 562   // builder
 563   Builder mBuilder;
 564
 565   FileList mFiles;
 566
 567   FileWatcher mFileWatcher;
 568   Timer       mTimer;
 569 };
 570
 571 //------------------------------------------------------------------------------
 572 //
 573 //
 574 //
 575 //------------------------------------------------------------------------------
 576 int DALI_EXPORT_API main(int argc, char** argv)
 577 {
 578   if(argc > 2)
 579   {
 580     if(strcmp(argv[1], "-f") == 0)
 581     {
 582       USER_DIRECTORY = argv[2];
 583     }
 584   }
 585
 586   Application app = Application::New(&argc, &argv, DEMO_THEME_PATH);
 587
 588   ExampleApp dali_app(app);
 589
 590   app.MainLoop();
 591
 592   return 0;
 593 }