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