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 namespace Toolkit
  30 {
  31 namespace Internal
  32 {
  33 ScrollViewPagePathEffect::ScrollViewPagePathEffect(Path path, const Vector3& forward, Dali::Property::Index inputPropertyIndex, const Vector3& viewPageSize, unsigned int pageCount)
  34 : mPageSize(viewPageSize),
  35   mInputPropertyIndex(inputPropertyIndex),
  36   mPageCount(pageCount)
  37 {
  38   //Create path constrainer
  39   mPathConstrainer = Dali::PathConstrainer::New();
  40   mPathConstrainer.SetProperty(PathConstrainer::Property::FORWARD, forward);
  41
  42   Dali::Property::Value pointsProperty = path.GetProperty(Path::Property::POINTS);
  43   mPathConstrainer.SetProperty(PathConstrainer::Property::POINTS, pointsProperty);
  44
  45   pointsProperty = path.GetProperty(Path::Property::CONTROL_POINTS);
  46   mPathConstrainer.SetProperty(PathConstrainer::Property::CONTROL_POINTS, pointsProperty);
  47
  48   //Create linear constrainer
  49   pointsProperty         = Property::Value(Property::ARRAY);
  50   Property::Array* array = pointsProperty.GetArray();
  51
  52   if(array)
  53   {
  54     array->PushBack(0.0f);
  55     array->PushBack(1.0f);
  56     array->PushBack(0.0f);
  57   }
  58   mLinearConstrainer = Dali::LinearConstrainer::New();
  59   mLinearConstrainer.SetProperty(LinearConstrainer::Property::VALUE, pointsProperty);
  60 }
  61
  62 ScrollViewPagePathEffect::~ScrollViewPagePathEffect()
  63 {
  64 }
  65
  66 void ScrollViewPagePathEffect::ApplyToPage(Actor page, unsigned int pageOrder)
  67 {
  68   float   pageHalfSize = mPageSize.x * 0.5f;
  69   Vector2 range        = Vector2(pageHalfSize - (pageHalfSize * pageOrder), -pageHalfSize - (pageHalfSize * pageOrder));
  70   Vector2 wrap         = Vector2(range.x, -pageHalfSize * (mPageCount - 2) + range.y);
  71
  72   Toolkit::ScrollView scrollView = GetScrollView();
  73
  74   //Position
  75   mPathConstrainer.Apply(Dali::Property(page, Dali::Actor::Property::POSITION),
  76                          Dali::Property(scrollView, mInputPropertyIndex),
  77                          range,
  78                          wrap);
  79
  80   //Rotation
  81   mPathConstrainer.Apply(Dali::Property(page, Dali::Actor::Property::ORIENTATION),
  82                          Dali::Property(scrollView, mInputPropertyIndex),
  83                          range,
  84                          wrap);
  85
  86   //Alpha
  87   mLinearConstrainer.Apply(Dali::Property(page, Dali::Actor::Property::COLOR_ALPHA),
  88                            Dali::Property(scrollView, mInputPropertyIndex),
  89                            range,
  90                            wrap);
  91 }
  92
  93 void ScrollViewPagePathEffect::OnAttach(Toolkit::ScrollView& scrollView)
  94 {
  95 }
  96
  97 void ScrollViewPagePathEffect::OnDetach(Toolkit::ScrollView& scrollView)
  98 {
  99 }
 100
 101 } // namespace Internal
 102
 103 } // namespace Toolkit
 104
 105 } // namespace Dali