text: /*
   * Copyright (c) 2020 Samsung Electronics Co., Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  /**
   * @file text-label-example.cpp
   * @brief Basic usage of TextLabel control
   */
  
  // EXTERNAL INCLUDES
  #include <dali-toolkit/dali-toolkit.h>
  #include <dali-toolkit/devel-api/controls/table-view/table-view.h>
  
  // INTERNAL INCLUDES
  #include "shared/multi-language-strings.h"
  #include "shared/view.h"
  
  using namespace Dali;
  using namespace Dali::Toolkit;
  using namespace MultiLanguageStrings;
  
  /**
   * @brief The main class of the demo.
   */
  class TextLabelMultiLanguageExample : public ConnectionTracker
  {
  public:
    TextLabelMultiLanguageExample(Application& application)
    : mApplication(application),
      mLastPoint(0.f)
    {
      // Connect to the Application's Init signal
      mApplication.InitSignal().Connect(this, &TextLabelMultiLanguageExample::Create);
    }
  
    ~TextLabelMultiLanguageExample()
    {
      // Nothing to do here.
    }
  
    /**
     * One-time setup in response to Application InitSignal.
     */
    void Create(Application& application)
    {
      Window window = application.GetWindow();
  
      window.KeyEventSignal().Connect(this, &TextLabelMultiLanguageExample::OnKeyEvent);
      window.SetBackgroundColor(Color::WHITE);
  
      mTableView = Toolkit::TableView::New(NUMBER_OF_LANGUAGES, 1);
      mTableView.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
      mTableView.SetResizePolicy(ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT);
      mTableView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_LEFT);
      mTableView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::TOP_LEFT);
      mTableView.TouchedSignal().Connect(this, &TextLabelMultiLanguageExample::OnTouch);
      window.Add(mTableView);
  
      for(unsigned int index = 0u; index < NUMBER_OF_LANGUAGES; ++index)
      {
        const Language& language = LANGUAGES[index];
  
        TextLabel label = TextLabel::New();
        label.SetProperty(TextLabel::Property::MULTI_LINE, true);
  
        const std::string text = language.languageName + " " + language.languageRomanName + " " + language.text;
        label.SetProperty(TextLabel::Property::TEXT, text);
  
        mTableView.SetFitHeight(index);
        mTableView.AddChild(label, Toolkit::TableView::CellPosition(index, 0));
      }
    }
  
    bool OnTouch(Actor actor, const TouchEvent& event)
    {
      if(1u == event.GetPointCount())
      {
        const PointState::Type state = event.GetState(0);
  
        // Clamp to integer values; this is to reduce flicking due to pixel misalignment
        const float localPoint = static_cast<float>(static_cast<int>(event.GetLocalPosition(0).y));
  
        if(PointState::DOWN == state)
        {
          mLastPoint = localPoint;
          mAnimation = Animation::New(0.25f);
        }
        else if(PointState::MOTION == state)
        {
          if(mAnimation)
          {
            mAnimation.AnimateBy(Property(mTableView, Actor::Property::POSITION), Vector3(0.f, localPoint - mLastPoint, 0.f), AlphaFunction::LINEAR);
            mAnimation.Play();
            mLastPoint = localPoint;
          }
        }
      }
  
      return true;
    }
  
    /**
     * Main key event handler
     */
    void OnKeyEvent(const KeyEvent& event)
    {
      if(event.GetState() == KeyEvent::DOWN)
      {
        if(IsKey(event, DALI_KEY_ESCAPE) || IsKey(event, DALI_KEY_BACK))
        {
          mApplication.Quit();
        }
      }
    }
  
  private:
    Application& mApplication;
    TableView    mTableView;
    Animation    mAnimation;
    float        mLastPoint;
  };
  
  int DALI_EXPORT_API main(int argc, char** argv)
  {
    Application                   application = Application::New(&argc, &argv, DEMO_THEME_PATH);
    TextLabelMultiLanguageExample test(application);
    application.MainLoop();
    return 0;
  }
  