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 #include <dali/devel-api/rendering/cull-face.h>
  26
  27 //INTERNAL INCLUDES
  28 #include <dali-toolkit/internal/controls/page-turn-view/page-turn-effect.h>
  29
  30 namespace Dali
  31 {
  32
  33 namespace Toolkit
  34 {
  35
  36 namespace Internal
  37 {
  38
  39 namespace
  40 {
  41 using namespace Dali;
  42
  43 DALI_TYPE_REGISTRATION_BEGIN( Toolkit::PageTurnPortraitView, Toolkit::PageTurnView, NULL )
  44 DALI_TYPE_REGISTRATION_END()
  45
  46 // 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
  47 const float GESTURE_SPEED_THRESHOLD(0.3f);
  48
  49 // the animation duration of turning the previous page back when an outwards flick is detected
  50 const float PAGE_TURN_OVER_ANIMATION_DURATION(0.5f);
  51
  52 }
  53
  54 PageTurnPortraitView::PageTurnPortraitView( PageFactory& pageFactory, const Vector2& pageSize )
  55 : PageTurnView( pageFactory, pageSize )
  56 {
  57
  58 }
  59
  60 PageTurnPortraitView::~PageTurnPortraitView()
  61 {
  62 }
  63
  64 Toolkit::PageTurnPortraitView PageTurnPortraitView::New( PageFactory& pageFactory, const Vector2& pageSize )
  65 {
  66   // Create the implementation, temporarily owned on stack
  67   IntrusivePtr< PageTurnPortraitView > internalPageTurnView = new PageTurnPortraitView( pageFactory, pageSize );
  68
  69   // Pass ownership to CustomActor
  70   Dali::Toolkit::PageTurnPortraitView pageTurnView( *internalPageTurnView );
  71
  72   // Second-phase init of the implementation
  73   // This can only be done after the CustomActor connection has been made...
  74   internalPageTurnView->Initialize();
  75
  76   return pageTurnView;
  77 }
  78
  79 void PageTurnPortraitView::OnPageTurnViewInitialize()
  80 {
  81   mControlSize = mPageSize;
  82   Self().SetSize( mPageSize );
  83   mTurningPageLayer.SetParentOrigin( ParentOrigin::CENTER_LEFT );
  84 }
  85
  86 Vector2 PageTurnPortraitView::SetPanPosition( const Vector2& gesturePosition )
  87 {
  88   return gesturePosition;
  89 }
  90
  91 void PageTurnPortraitView::SetPanActor( const Vector2& panPosition )
  92 {
  93   if( mCurrentPageIndex < mTotalPageCount )
  94   {
  95     mPanActor = mPageActors[mCurrentPageIndex%NUMBER_OF_CACHED_PAGES];
  96     mTurningPageIndex = mCurrentPageIndex;
  97   }
  98   else
  99   {
 100     mPanActor.Reset();
 101   }
 102 }
 103
 104 void PageTurnPortraitView::SetSpineEffect(ImageActor actor, bool isLeftSide)
 105 {
 106   if(isLeftSide)
 107   {
 108     actor.RemoveShaderEffect();
 109   }
 110   else
 111   {
 112     actor.SetShaderEffect( mSpineEffectFront );
 113   }
 114 }
 115
 116 void PageTurnPortraitView::OnPossibleOutwardsFlick( const Vector2& panPosition, float gestureSpeed )
 117 {
 118   Vector2 offset = panPosition - mPressDownPosition;
 119   // There is previous page and an outwards flick is detected
 120   if( mCurrentPageIndex > 0 && gestureSpeed > GESTURE_SPEED_THRESHOLD && offset.x > fabs( offset.y ))
 121   {
 122     ImageActor actor = mPageActors[ (mCurrentPageIndex-1) % NUMBER_OF_CACHED_PAGES ];
 123     if(actor.GetParent() != Self())
 124     {
 125       return;
 126     }
 127
 128     // Guard against destruction during signal emission
 129     //Emit signal, to notify that page[mCurrentPageIndex-1] is turning backwards
 130     Toolkit::PageTurnView handle( GetOwner() );
 131     mTurningPageIndex = mCurrentPageIndex-1;
 132     mPageTurnStartedSignal.Emit( handle, static_cast<unsigned int>(mTurningPageIndex), false );
 133
 134     //update pages
 135     mCurrentPageIndex--;
 136     RemovePage( mCurrentPageIndex+NUMBER_OF_CACHED_PAGES_EACH_SIDE );
 137     AddPage( mCurrentPageIndex-NUMBER_OF_CACHED_PAGES_EACH_SIDE );
 138     OrganizePageDepth();
 139
 140     mPageActors[mTurningPageIndex%NUMBER_OF_CACHED_PAGES].SetVisible(true);
 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", 1.f );
 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     mAnimationPageIdPair[animation] = mCurrentPageIndex;
 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
 163     ImageActor imageActor = ImageActor::DownCast(actor);
 164     if( imageActor )
 165     {
 166       SetCullFace( imageActor, CullBack );
 167     }
 168     animation.FinishedSignal().Connect( this, &PageTurnPortraitView::TurnedOverBackwards );
 169   }
 170 }
 171
 172 void PageTurnPortraitView::OnTurnedOver( ImageActor actor, bool isLeftSide )
 173 {
 174   if( isLeftSide )
 175   {
 176     actor.SetVisible( false );
 177   }
 178 }
 179
 180 void PageTurnPortraitView::TurnedOverBackwards( Animation& animation )
 181 {
 182   ImageActor imageActor =  mPageActors[mAnimationPageIdPair[animation] % NUMBER_OF_CACHED_PAGES];
 183   if( imageActor )
 184   {
 185     SetCullFace( imageActor, CullNone );
 186   }
 187   TurnedOver( animation );
 188 }
 189
 190 } // namespace Internal
 191
 192 } // namespace Toolkit
 193
 194 } // namespace Dali