dali-toolkit/internal/controls/scrollable/scrollable-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 // EXTERNAL INCLUDES
  19 #include <cstring> // for strcmp
  20 #include <dali/public-api/object/type-registry.h>
  21 #include <dali/public-api/object/type-registry-helper.h>
  22
  23 // INTERNAL INCLUDES
  24 #include <dali-toolkit/internal/controls/scrollable/scrollable-impl.h>
  25
  26 using namespace Dali;
  27
  28 namespace Dali
  29 {
  30
  31 namespace Toolkit
  32 {
  33
  34 namespace Internal
  35 {
  36
  37 namespace
  38 {
  39
  40 BaseHandle Create()
  41 {
  42   // empty handle as we cannot create Scrollable (but type registered for scroll signal)
  43   return BaseHandle();
  44 }
  45
  46 // Setup properties, signals and actions using the type-registry.
  47 DALI_TYPE_REGISTRATION_BEGIN( Toolkit::Scrollable, Toolkit::Control, Create );
  48
  49 DALI_PROPERTY_REGISTRATION( Toolkit, Scrollable, "overshootEffectColor",      VECTOR4, OVERSHOOT_EFFECT_COLOR    )
  50 DALI_PROPERTY_REGISTRATION( Toolkit, Scrollable, "overshootAnimationSpeed",   FLOAT,   OVERSHOOT_ANIMATION_SPEED )
  51 DALI_PROPERTY_REGISTRATION( Toolkit, Scrollable, "overshootEnabled",          BOOLEAN, OVERSHOOT_ENABLED )
  52 DALI_PROPERTY_REGISTRATION( Toolkit, Scrollable, "overshootSize",             VECTOR2, OVERSHOOT_SIZE )
  53 DALI_PROPERTY_REGISTRATION( Toolkit, Scrollable, "scrollToAlphaFunction",     INTEGER, SCROLL_TO_ALPHA_FUNCTION )
  54
  55 DALI_ANIMATABLE_PROPERTY_REGISTRATION( Toolkit, Scrollable, "scrollRelativePosition",   VECTOR2, SCROLL_RELATIVE_POSITION)
  56 DALI_ANIMATABLE_PROPERTY_REGISTRATION( Toolkit, Scrollable, "scrollPositionMin",        VECTOR2, SCROLL_POSITION_MIN)
  57 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION( Toolkit, Scrollable, "scrollPositionMinX",    SCROLL_POSITION_MIN_X, SCROLL_POSITION_MIN, 0)
  58 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION( Toolkit, Scrollable, "scrollPositionMinY",    SCROLL_POSITION_MIN_Y, SCROLL_POSITION_MIN, 1)
  59 DALI_ANIMATABLE_PROPERTY_REGISTRATION( Toolkit, Scrollable, "scrollPositionMax",        VECTOR2, SCROLL_POSITION_MAX)
  60 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION( Toolkit, Scrollable, "scrollPositionMaxX",    SCROLL_POSITION_MAX_X, SCROLL_POSITION_MAX, 0)
  61 DALI_ANIMATABLE_PROPERTY_COMPONENT_REGISTRATION( Toolkit, Scrollable, "scrollPositionMaxY",    SCROLL_POSITION_MAX_Y, SCROLL_POSITION_MAX, 1)
  62 DALI_ANIMATABLE_PROPERTY_REGISTRATION( Toolkit, Scrollable, "canScrollVertical",        BOOLEAN, CAN_SCROLL_VERTICAL)
  63 DALI_ANIMATABLE_PROPERTY_REGISTRATION( Toolkit, Scrollable, "canScrollHorizontal",      BOOLEAN, CAN_SCROLL_HORIZONTAL)
  64
  65 DALI_SIGNAL_REGISTRATION(              Toolkit, Scrollable, "scrollStarted",                     SIGNAL_SCROLL_STARTED    )
  66 DALI_SIGNAL_REGISTRATION(              Toolkit, Scrollable, "scrollCompleted",                   SIGNAL_SCROLL_COMPLETED  )
  67 DALI_SIGNAL_REGISTRATION(              Toolkit, Scrollable, "scrollUpdated",                     SIGNAL_SCROLL_UPDATED    )
  68
  69 DALI_TYPE_REGISTRATION_END()
  70
  71 const Vector4 DEFAULT_OVERSHOOT_COLOUR(0.0f, 0.64f, 0.85f, 0.25f);
  72 const float DEFAULT_OVERSHOOT_ANIMATION_SPEED(120.0f); // 120 pixels per second
  73 const Vector2 OVERSHOOT_DEFAULT_SIZE( 720.0f, 42.0f );
  74
  75 }
  76
  77 ///////////////////////////////////////////////////////////////////////////////////////////////////
  78 // Scrollable
  79 ///////////////////////////////////////////////////////////////////////////////////////////////////
  80
  81 // Scrollable controls are not layout containers so they dont need size negotiation..
  82 // we dont want size negotiation while scrolling if we can avoid it
  83 Scrollable::Scrollable()
  84 : Control( ControlBehaviour( REQUIRES_TOUCH_EVENTS | REQUIRES_STYLE_CHANGE_SIGNALS | DISABLE_SIZE_NEGOTIATION ) ),
  85   mOvershootEffectColor(  DEFAULT_OVERSHOOT_COLOUR ),
  86   mOvershootAnimationSpeed ( DEFAULT_OVERSHOOT_ANIMATION_SPEED ),
  87   mOvershootSize( OVERSHOOT_DEFAULT_SIZE ),
  88   mScrollToAlphaFunction( AlphaFunction::EASE_OUT ),
  89   mOvershootEnabled(true)
  90 {
  91 }
  92
  93 Scrollable::Scrollable( ControlBehaviour behaviourFlags )
  94 : Control( ControlBehaviour( REQUIRES_TOUCH_EVENTS | REQUIRES_STYLE_CHANGE_SIGNALS | behaviourFlags ) ),
  95   mOvershootEffectColor(  DEFAULT_OVERSHOOT_COLOUR ),
  96   mOvershootAnimationSpeed ( DEFAULT_OVERSHOOT_ANIMATION_SPEED ),
  97   mOvershootSize( OVERSHOOT_DEFAULT_SIZE ),
  98   mScrollToAlphaFunction( AlphaFunction::EASE_OUT ),
  99   mOvershootEnabled(true)
 100 {
 101 }
 102
 103 Scrollable::~Scrollable()
 104 {
 105 }
 106
 107 bool Scrollable::IsOvershootEnabled() const
 108 {
 109   return mOvershootEnabled;
 110 }
 111
 112 void Scrollable::SetOvershootEnabled(bool enable)
 113 {
 114   EnableScrollOvershoot(enable);
 115   mOvershootEnabled = enable;
 116 }
 117
 118 Vector4 Scrollable::GetOvershootEffectColor() const
 119 {
 120   return mOvershootEffectColor;
 121 };
 122
 123 void Scrollable::SetOvershootAnimationSpeed( float pixelsPerSecond )
 124 {
 125   mOvershootAnimationSpeed = pixelsPerSecond;
 126 }
 127
 128 float Scrollable::GetOvershootAnimationSpeed() const
 129 {
 130   return mOvershootAnimationSpeed;
 131 };
 132
 133 const Vector2& Scrollable::GetOvershootSize() const
 134 {
 135   return mOvershootSize;
 136 }
 137
 138 Toolkit::Scrollable::ScrollStartedSignalType& Scrollable::ScrollStartedSignal()
 139 {
 140   return mScrollStartedSignal;
 141 }
 142
 143 Toolkit::Scrollable::ScrollUpdatedSignalType& Scrollable::ScrollUpdatedSignal()
 144 {
 145   return mScrollUpdatedSignal;
 146 }
 147
 148 Toolkit::Scrollable::ScrollCompletedSignalType& Scrollable::ScrollCompletedSignal()
 149 {
 150   return mScrollCompletedSignal;
 151 }
 152
 153 bool Scrollable::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 154 {
 155   Dali::BaseHandle handle( object );
 156
 157   bool connected( true );
 158   Toolkit::Scrollable scrollable = Toolkit::Scrollable::DownCast( handle );
 159
 160   if( 0 == strcmp( signalName.c_str(), SIGNAL_SCROLL_STARTED ) )
 161   {
 162     scrollable.ScrollStartedSignal().Connect( tracker, functor );
 163   }
 164   else if( 0 == strcmp( signalName.c_str(), SIGNAL_SCROLL_UPDATED ) )
 165   {
 166     scrollable.ScrollUpdatedSignal().Connect( tracker, functor );
 167   }
 168   else if( 0 == strcmp( signalName.c_str(), SIGNAL_SCROLL_COMPLETED ) )
 169   {
 170     scrollable.ScrollCompletedSignal().Connect( tracker, functor );
 171   }
 172   else
 173   {
 174     // signalName does not match any signal
 175     connected = false;
 176   }
 177
 178   return connected;
 179 }
 180
 181 void Scrollable::SetProperty( BaseObject* object, Property::Index index, const Property::Value& value )
 182 {
 183   Toolkit::Scrollable scrollable = Toolkit::Scrollable::DownCast( Dali::BaseHandle( object ) );
 184
 185   if( scrollable )
 186   {
 187     Scrollable& scrollableImpl( GetImpl( scrollable ) );
 188     switch( index )
 189     {
 190       case Toolkit::Scrollable::Property::OVERSHOOT_EFFECT_COLOR:
 191       {
 192         scrollableImpl.SetOvershootEffectColor( value.Get<Vector4>() );
 193         break;
 194       }
 195       case Toolkit::Scrollable::Property::OVERSHOOT_ANIMATION_SPEED:
 196       {
 197         scrollableImpl.SetOvershootAnimationSpeed( value.Get<float>() );
 198         break;
 199       }
 200       case Toolkit::Scrollable::Property::OVERSHOOT_ENABLED:
 201       {
 202         scrollableImpl.SetOvershootEnabled( value.Get<bool>() );
 203         break;
 204       }
 205       case Toolkit::Scrollable::Property::OVERSHOOT_SIZE:
 206       {
 207         Vector2 input;
 208         if( value.Get( input ) )
 209         {
 210           scrollableImpl.mOvershootSize = input;
 211         }
 212         scrollableImpl.EnableScrollOvershoot( scrollableImpl.IsOvershootEnabled() );
 213         break;
 214       }
 215       case Toolkit::Scrollable::Property::SCROLL_TO_ALPHA_FUNCTION:
 216       {
 217         int alphaFunction = value.Get<int>();
 218
 219         if( alphaFunction >= AlphaFunction::DEFAULT &&
 220             alphaFunction <  AlphaFunction::COUNT )
 221         {
 222           scrollableImpl.mScrollToAlphaFunction = static_cast< AlphaFunction::BuiltinFunction >( alphaFunction );
 223         }
 224         break;
 225       }
 226     }
 227   }
 228 }
 229
 230 Property::Value Scrollable::GetProperty( BaseObject* object, Property::Index index )
 231 {
 232   Property::Value value;
 233
 234   Toolkit::Scrollable scrollable = Toolkit::Scrollable::DownCast( Dali::BaseHandle( object ) );
 235
 236   if( scrollable )
 237   {
 238     Scrollable& scrollableImpl( GetImpl( scrollable ) );
 239     switch( index )
 240     {
 241       case Toolkit::Scrollable::Property::OVERSHOOT_EFFECT_COLOR:
 242       {
 243         value = scrollableImpl.GetOvershootEffectColor();
 244         break;
 245       }
 246       case Toolkit::Scrollable::Property::OVERSHOOT_ANIMATION_SPEED:
 247       {
 248         value = scrollableImpl.GetOvershootAnimationSpeed();
 249         break;
 250       }
 251       case Toolkit::Scrollable::Property::OVERSHOOT_ENABLED:
 252       {
 253         value = scrollableImpl.IsOvershootEnabled();
 254         break;
 255       }
 256       case Toolkit::Scrollable::Property::OVERSHOOT_SIZE:
 257       {
 258         value = scrollableImpl.mOvershootSize;
 259         break;
 260       }
 261       case Toolkit::Scrollable::Property::SCROLL_TO_ALPHA_FUNCTION:
 262       {
 263         value = static_cast<int>( scrollableImpl.mScrollToAlphaFunction );
 264         break;
 265       }
 266     }
 267   }
 268
 269   return value;
 270 }
 271
 272 } // namespace Internal
 273
 274 } // namespace Toolkit
 275
 276 } // namespace Dali