Peter M. Groen / dali-demo

/*
 * 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.
 *
 */

#include <dali-toolkit/dali-toolkit.h>
#include <dali-toolkit/devel-api/controls/table-view/table-view.h>
#include <dali/devel-api/actors/actor-devel.h>

#include <iostream>

using namespace Dali;
using namespace Dali::Toolkit;

namespace
{
const int     TABLE_VIEW_ROWS    = 5;
const int     TABLE_VIEW_COLUMNS = 3;
const Vector3 TABLE_VIEW_SIZE_MODE_FACTOR(0.6f, 0.6f, 1.0f);

const Quaternion                     ANIMATION_ROTATION(Degree(360.0f), Vector3::ZAXIS);
const AlphaFunction::BuiltinFunction ROTATION_ANIMATION_ALPHA_FUNCTION(AlphaFunction::EASE_IN_OUT);
const TimePeriod                     ROTATION_ANIMATION_TIME_PERIOD(0.0f, 0.5f);

const Vector3                        ANIMATION_SCALE(2.0f, 2.0f, 1.0f);
const AlphaFunction::BuiltinFunction SCALE_ANIMATION_ALPHA_FUNCTION(AlphaFunction::SIN);
const TimePeriod                     SCALE_ANIMATION_TIME_PERIOD(0.15f, 0.85f);
} // unnamed namespace

/**
 * @brief Demonstrates how to animate a control in a layout-container using the anchor point as the pivot.
 *
 * Positions of the controls in the layout-container will be set using the top-left of the control.
 */
class PivotController : public ConnectionTracker
{
public:
  /**
   * @brief Constructor.
   * @param[in] application Reference to the application instance.
   */
  PivotController(Application& application)
  : mApplication(application)
  {
    mApplication.InitSignal().Connect(this, &PivotController::Create);
  }

private:
  /**
   * @brief The Init signal is received once (only) during the Application lifetime.
   */
  void Create(Application& application)
  {
    // Get a handle to the window
    Window window = application.GetWindow();
    window.SetBackgroundColor(Color::WHITE);
    window.KeyEventSignal().Connect(this, &PivotController::OnKeyEvent);

    // Create a table view.
    TableView tableView = TableView::New(TABLE_VIEW_ROWS, TABLE_VIEW_COLUMNS);
    tableView.SetProperty(Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER);
    tableView.SetProperty(Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER);
    tableView.SetResizePolicy(ResizePolicy::SIZE_RELATIVE_TO_PARENT, Dimension::ALL_DIMENSIONS);
    tableView.SetProperty(Actor::Property::SIZE_MODE_FACTOR, TABLE_VIEW_SIZE_MODE_FACTOR);
    window.Add(tableView);

    // Create a tap detector - we are going to rotate an actor round our anchor-point (pivot) when one of our controls is tapped.
    mTapDetector = TapGestureDetector::New();
    mTapDetector.DetectedSignal().Connect(this, &PivotController::OnTap);

    Vector3 anchorPoint(AnchorPoint::CENTER); // This will be changed depending on the row and column.

    // Add controls to the table-view - each control will have a random color.
    for(int row = 0; row < TABLE_VIEW_ROWS; ++row)
    {
      anchorPoint.y = (row % TABLE_VIEW_ROWS) * (1.0f / (TABLE_VIEW_ROWS - 1)); // Calculate this row's y anchor-point.

      for(int column = 0; column < TABLE_VIEW_COLUMNS; ++column)
      {
        anchorPoint.x = (column % TABLE_VIEW_COLUMNS) * (1.0f / (TABLE_VIEW_COLUMNS - 1)); // Calculate this column's x anchor-point.

        // Create a control with a randomly chosen background color.
        Control control = Control::New();
        control.SetBackgroundColor(Vector4(Random::Range(0.0f, 1.0f), Random::Range(0.0f, 1.0f), Random::Range(0.0f, 1.0f), 1.0f));
        control.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS);
        control.SetProperty(Actor::Property::POSITION_USES_ANCHOR_POINT, false); // Ensures the position always uses top-left for its calculations.
        control.SetProperty(Actor::Property::ANCHOR_POINT, anchorPoint);         // This anchor-point is used for the rotation and the scale.

        // Add to the table-view
        tableView.AddChild(control, TableView::CellPosition(row, column));

        // Attach each control to the tap-detector so we can start the animation around our anchor point.
        mTapDetector.Attach(control);
      }
    }
  }

  /**
   * @brief Called when a control is tapped.
   *
   * Here we will start an animation around our pivot.
   */
  void OnTap(Actor actor, const TapGesture& /* tap */)
  {
    // Raise the actor to the top.
    actor.RaiseToTop();

    // Create the animation to rotate and scale our actor.
    Animation animation = Animation::New(1.0f);
    animation.AnimateBy(Property(actor, Actor::Property::ORIENTATION), ANIMATION_ROTATION, ROTATION_ANIMATION_ALPHA_FUNCTION, ROTATION_ANIMATION_TIME_PERIOD);
    animation.AnimateTo(Property(actor, Actor::Property::SCALE), ANIMATION_SCALE, SCALE_ANIMATION_ALPHA_FUNCTION, SCALE_ANIMATION_TIME_PERIOD);

    // Play the animation.
    animation.Play();
  }

  /**
   * @brief Called when any key event is received
   *
   * Will use this to quit the application if Back or the Escape key is received
   * @param[in] event The key event information
   */
  void OnKeyEvent(const KeyEvent& event)
  {
    if(event.GetState() == KeyEvent::DOWN)
    {
      if(IsKey(event, Dali::DALI_KEY_ESCAPE) || IsKey(event, Dali::DALI_KEY_BACK))
      {
        mApplication.Quit();
      }
    }
  }

private:
  Application&       mApplication; ///< Reference to the Application instance.
  TapGestureDetector mTapDetector; ///< Used for animating the tapped control.
};

int DALI_EXPORT_API main(int argc, char** argv)
{
  Application     application = Application::New(&argc, &argv);
  PivotController test(application);
  application.MainLoop();
  return 0;
}