dali-toolkit/internal/controls/page-turn-view/page-turn-portrait-view-impl.cpp

   1 /*
   2  * Copyright (c) 2014 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/page-turn-view/page-turn-portrait-view-impl.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/public-api/animation/animation.h>
  23 #include <dali/public-api/object/type-registry.h>
  24 #include <dali/devel-api/object/type-registry-helper.h>
  25
  26 //INTERNAL INCLUDES
  27 #include <dali-toolkit/internal/controls/page-turn-view/page-turn-effect.h>
  28
  29 namespace Dali
  30 {
  31
  32 namespace Toolkit
  33 {
  34
  35 namespace Internal
  36 {
  37
  38 namespace
  39 {
  40 using namespace Dali;
  41
  42 DALI_TYPE_REGISTRATION_BEGIN( Toolkit::PageTurnPortraitView, Toolkit::PageTurnView, NULL )
  43 DALI_TYPE_REGISTRATION_END()
  44
  45 // the panning speed threshold, no matter how far is the pan displacement, pan fast to left/right quickly (speed > 0.3) will turn over/back the page
  46 const float GESTURE_SPEED_THRESHOLD(0.3f);
  47
  48 // the animation duration of turning the previous page back when an outwards flick is detected
  49 const float PAGE_TURN_OVER_ANIMATION_DURATION(0.5f);
  50
  51 }
  52
  53 PageTurnPortraitView::PageTurnPortraitView( PageFactory& pageFactory, const Vector2& pageSize )
  54 : PageTurnView( pageFactory, pageSize )
  55 {
  56
  57 }
  58
  59 PageTurnPortraitView::~PageTurnPortraitView()
  60 {
  61 }
  62
  63 Toolkit::PageTurnPortraitView PageTurnPortraitView::New( PageFactory& pageFactory, const Vector2& pageSize )
  64 {
  65   // Create the implementation, temporarily owned on stack
  66   IntrusivePtr< PageTurnPortraitView > internalPageTurnView = new PageTurnPortraitView( pageFactory, pageSize );
  67
  68   // Pass ownership to CustomActor
  69   Dali::Toolkit::PageTurnPortraitView pageTurnView( *internalPageTurnView );
  70
  71   // Second-phase init of the implementation
  72   // This can only be done after the CustomActor connection has been made...
  73   internalPageTurnView->Initialize();
  74
  75   return pageTurnView;
  76 }
  77
  78 void PageTurnPortraitView::OnPageTurnViewInitialize()
  79 {
  80   mControlSize = mPageSize;
  81   Self().SetSize( mPageSize );
  82   mTurningPageLayer.SetParentOrigin( ParentOrigin::CENTER_LEFT );
  83 }
  84
  85 ImageActor PageTurnPortraitView::NewPageFromRenderBuffer( int pageIndex )
  86 {
  87   return ImageActor::New(mRenderedPage[pageIndex % NUMBER_OF_CACHED_PAGES]);
  88 }
  89
  90 Vector2 PageTurnPortraitView::SetPanPosition( const Vector2& gesturePosition )
  91 {
  92   return gesturePosition;
  93 }
  94
  95 void PageTurnPortraitView::SetPanActor( const Vector2& panPosition )
  96 {
  97   if( mCurrentPageIndex < mTotalPageCount )
  98   {
  99     mPanActor = mPageActors[mCurrentPageIndex%NUMBER_OF_CACHED_PAGES];
 100   }
 101   else
 102   {
 103     mPanActor.Reset();
 104   }
 105 }
 106
 107 void PageTurnPortraitView::SetSpineEffect(ImageActor actor, bool isLeftSide)
 108 {
 109   if(isLeftSide)
 110   {
 111     actor.RemoveShaderEffect();
 112   }
 113   else
 114   {
 115     actor.SetShaderEffect( mSpineEffectFront );
 116   }
 117 }
 118
 119 void PageTurnPortraitView::OnPossibleOutwardsFlick( const Vector2& panPosition, float gestureSpeed )
 120 {
 121   Vector2 offset = panPosition - mPressDownPosition;
 122   // There is previous page and an outwards flick is detected
 123   if( mCurrentPageIndex > 0 && gestureSpeed > GESTURE_SPEED_THRESHOLD && offset.x > fabs( offset.y ))
 124   {
 125     ImageActor actor = mPageActors[ (mCurrentPageIndex-1) % NUMBER_OF_CACHED_PAGES ];
 126     if(actor.GetParent() != mRootOnScreen)
 127     {
 128       return;
 129     }
 130
 131     // Guard against destruction during signal emission
 132     //Emit signal, to notify that page[mCurrentPageIndex-1] is turning backwards
 133     Toolkit::PageTurnView handle( GetOwner() );
 134     mPageTurnStartedSignal.Emit( handle, static_cast<unsigned int>(mCurrentPageIndex-1), false );
 135
 136     //update pages
 137     mCurrentPageIndex--;
 138     RemovePage( mCurrentPageIndex+NUMBER_OF_CACHED_PAGES_EACH_SIDE );
 139     AddPage( mCurrentPageIndex-NUMBER_OF_CACHED_PAGES_EACH_SIDE );
 140     OrganizePageDepth();
 141
 142     // Add the page to tuning page layer and set up PageTurnEffect
 143     mShadowView.Add( actor );
 144     actor.SetShaderEffect( mTurnEffect[mIndex] );
 145     PageTurnApplyInternalConstraint(mTurnEffect[mIndex]);
 146     mIsAnimating[mIndex] = true;
 147     mTurnEffect[mIndex].SetUniform("uIsTurningBack", true );
 148     Vector2 originalCenter( mPageSize.width*1.5f, 0.5f*mPageSize.height );
 149     mTurnEffect[mIndex].SetUniform("uOriginalCenter", originalCenter );
 150     mTurnEffect[mIndex].SetUniform("uCurrentCenter", Vector2( mPageSize.width*0.5f, mPageSize.height*0.5f ) );
 151
 152     // Start an animation to turn the previous page back
 153     Animation animation = Animation::New( PAGE_TURN_OVER_ANIMATION_DURATION );
 154     mAnimationActorPair[animation] = actor;
 155     mAnimationIndexPair[animation] = mIndex;
 156
 157     animation.AnimateTo( Property( mTurnEffect[mIndex], "uCurrentCenter" ),
 158                          originalCenter,
 159                          AlphaFunction::EASE_OUT, TimePeriod(PAGE_TURN_OVER_ANIMATION_DURATION*0.75f) );
 160     animation.AnimateBy( Property( actor, Actor::Property::ORIENTATION ), AngleAxis( Degree( 180.0f ), Vector3::YAXIS ) ,AlphaFunction::EASE_OUT );
 161     animation.Play();
 162     ImageActor::DownCast(actor).SetCullFace( CullBack );
 163     animation.FinishedSignal().Connect( this, &PageTurnPortraitView::OnTurnedOver );
 164   }
 165 }
 166
 167 void PageTurnPortraitView::OnTurnedOver( Animation& animation )
 168 {
 169   ImageActor::DownCast(mAnimationActorPair[animation]).SetCullFace( CullNone );
 170   TurnedOver( animation );
 171 }
 172
 173 } // namespace Internal
 174
 175 } // namespace Toolkit
 176
 177 } // namespace Dali