dali-toolkit/internal/controls/scrollable/scroll-view/scroll-view-page-path-effect-impl.cpp

   1 /*
   2  * Copyright (c) 2015 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 // CLASS HEADER
  19 #include <dali-toolkit/internal/controls/scrollable/scroll-view/scroll-view-page-path-effect-impl.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/public-api/object/property-array.h>
  23
  24 // INTERNAL INCLUDES
  25 #include <dali-toolkit/public-api/controls/scrollable/scroll-view/scroll-view.h>
  26
  27 namespace Dali
  28 {
  29
  30 namespace Toolkit
  31 {
  32
  33 namespace Internal
  34 {
  35
  36 ScrollViewPagePathEffect::ScrollViewPagePathEffect(Path path, const Vector3& forward, Dali::Property::Index inputPropertyIndex, const Vector3& pageSize, unsigned int pageCount)
  37 :mPageSize(pageSize),
  38  mInputPropertyIndex(inputPropertyIndex),
  39  mPageCount(pageCount)
  40 {
  41   //Create path constrainer
  42   mPathConstrainer = Dali::PathConstrainer::New();
  43   mPathConstrainer.SetProperty( PathConstrainer::Property::FORWARD, forward );
  44
  45   Dali::Property::Value pointsProperty = path.GetProperty(Path::Property::POINTS);
  46   mPathConstrainer.SetProperty( PathConstrainer::Property::POINTS, pointsProperty );
  47
  48   pointsProperty = path.GetProperty(Path::Property::CONTROL_POINTS);
  49   mPathConstrainer.SetProperty( PathConstrainer::Property::CONTROL_POINTS, pointsProperty );
  50
  51   //Create linear constrainer
  52   pointsProperty = Property::Value(Property::ARRAY);
  53   Property::Array* array = pointsProperty.GetArray();
  54
  55   if( array )
  56   {
  57     array->PushBack(0.0f);
  58     array->PushBack(1.0f);
  59     array->PushBack(0.0f);
  60   }
  61   mLinearConstrainer = Dali::LinearConstrainer::New();
  62   mLinearConstrainer.SetProperty( LinearConstrainer::Property::VALUE, pointsProperty );
  63 }
  64
  65 ScrollViewPagePathEffect::~ScrollViewPagePathEffect()
  66 {
  67 }
  68
  69 void ScrollViewPagePathEffect::ApplyToPage( Actor page, unsigned int pageOrder )
  70 {
  71   float pageHalfSize = mPageSize.x * 0.5f;
  72   Vector2 range = Vector2( pageHalfSize - (pageHalfSize*pageOrder),  -pageHalfSize - (pageHalfSize*pageOrder) );
  73   Vector2 wrap  = Vector2( range.x, -pageHalfSize*(mPageCount-2) + range.y);
  74
  75   Toolkit::ScrollView scrollView = GetScrollView();
  76
  77   //Position
  78   mPathConstrainer.Apply( Dali::Property( page, Dali::Actor::Property::POSITION ),
  79                           Dali::Property( scrollView, mInputPropertyIndex),
  80                           range, wrap
  81                         );
  82
  83   //Rotation
  84   mPathConstrainer.Apply( Dali::Property( page, Dali::Actor::Property::ORIENTATION ),
  85                           Dali::Property( scrollView, mInputPropertyIndex ),
  86                           range, wrap
  87                         );
  88
  89   //Alpha
  90   mLinearConstrainer.Apply( Dali::Property( page, Dali::Actor::Property::COLOR_ALPHA ),
  91                             Dali::Property( scrollView, mInputPropertyIndex ),
  92                             range, wrap
  93                           );
  94
  95 }
  96
  97 void ScrollViewPagePathEffect::OnAttach(Toolkit::ScrollView& scrollView)
  98 {
  99 }
 100
 101 void ScrollViewPagePathEffect::OnDetach(Toolkit::ScrollView& scrollView)
 102 {
 103 }
 104
 105 } // namespace Internal
 106
 107 } // namespace Toolkit
 108
 109 } // namespace Dali