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 //INTERNAL INCLUDES
  22 #include <dali-toolkit/public-api/controls/scrollable/scroll-view/scroll-view.h>
  23
  24 namespace Dali
  25 {
  26
  27 namespace Toolkit
  28 {
  29
  30 namespace Internal
  31 {
  32
  33 ScrollViewPagePathEffect::ScrollViewPagePathEffect(Path path, const Vector3& forward, Dali::Property::Index inputPropertyIndex, const Vector3& pageSize, unsigned int pageCount)
  34 :mPageSize(pageSize),
  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   pointsProperty.AppendItem(0.0f);
  51   pointsProperty.AppendItem(1.0f);
  52   pointsProperty.AppendItem(0.0f);
  53   mLinearConstrainer = Dali::LinearConstrainer::New();
  54   mLinearConstrainer.SetProperty( LinearConstrainer::Property::VALUE, pointsProperty );
  55 }
  56
  57 ScrollViewPagePathEffect::~ScrollViewPagePathEffect()
  58 {
  59 }
  60
  61 void ScrollViewPagePathEffect::ApplyToPage( Actor page, unsigned int pageOrder )
  62 {
  63   float pageHalfSize = mPageSize.x * 0.5f;
  64   Vector2 range = Vector2( pageHalfSize - (pageHalfSize*pageOrder),  -pageHalfSize - (pageHalfSize*pageOrder) );
  65   Vector2 wrap  = Vector2( range.x, -pageHalfSize*(mPageCount-2) + range.y);
  66
  67   Toolkit::ScrollView scrollView = GetScrollView();
  68
  69   //Position
  70   mPathConstrainer.Apply( Dali::Property( page, Dali::Actor::Property::POSITION ),
  71                           Dali::Property( scrollView, mInputPropertyIndex),
  72                           range, wrap
  73                         );
  74
  75   //Rotation
  76   mPathConstrainer.Apply( Dali::Property( page, Dali::Actor::Property::ORIENTATION ),
  77                           Dali::Property( scrollView, mInputPropertyIndex ),
  78                           range, wrap
  79                         );
  80
  81   //Alpha
  82   mLinearConstrainer.Apply( Dali::Property( page, Dali::Actor::Property::COLOR_ALPHA ),
  83                             Dali::Property( scrollView, mInputPropertyIndex ),
  84                             range, wrap
  85                           );
  86
  87 }
  88
  89 void ScrollViewPagePathEffect::OnAttach(Toolkit::ScrollView& scrollView)
  90 {
  91 }
  92
  93 void ScrollViewPagePathEffect::OnDetach(Toolkit::ScrollView& scrollView)
  94 {
  95 }
  96
  97 } // namespace Internal
  98
  99 } // namespace Toolkit
 100
 101 } // namespace Dali