2 * Copyright (c) 2019 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <dali-toolkit/public-api/controls/control-impl.h>
22 #include <cstring> // for strcmp
26 #include <dali/public-api/animation/constraint.h>
27 #include <dali/public-api/object/type-registry-helper.h>
28 #include <dali/public-api/object/type-info.h>
29 #include <dali/public-api/size-negotiation/relayout-container.h>
30 #include <dali/public-api/common/stage.h>
31 #include <dali/devel-api/scripting/scripting.h>
32 #include <dali/integration-api/debug.h>
33 #include <dali/devel-api/actors/actor-devel.h>
36 #include <dali-toolkit/public-api/align-enumerations.h>
37 #include <dali-toolkit/public-api/controls/control.h>
38 #include <dali-toolkit/public-api/focus-manager/keyboard-focus-manager.h>
39 #include <dali-toolkit/public-api/styling/style-manager.h>
40 #include <dali-toolkit/public-api/visuals/color-visual-properties.h>
41 #include <dali-toolkit/public-api/visuals/visual-properties.h>
42 #include <dali-toolkit/devel-api/controls/control-depth-index-ranges.h>
43 #include <dali-toolkit/devel-api/controls/control-devel.h>
44 #include <dali-toolkit/devel-api/focus-manager/keyinput-focus-manager.h>
45 #include <dali-toolkit/devel-api/visuals/color-visual-properties-devel.h>
46 #include <dali-toolkit/internal/styling/style-manager-impl.h>
47 #include <dali-toolkit/internal/visuals/color/color-visual.h>
48 #include <dali-toolkit/internal/visuals/visual-string-constants.h>
49 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
50 #include <dali/devel-api/actors/actor-devel.h>
51 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
53 #include <dali/devel-api/actors/actor-devel.h>
54 #include <dali-toolkit/dali-toolkit.h>
55 #include <dali/devel-api/actors/actor-devel.h>
69 #if defined(DEBUG_ENABLED)
70 Debug::Filter* gLogFilter = Debug::Filter::New( Debug::NoLogging, false, "LOG_CONTROL_VISUALS");
74 * @brief Replace the background visual if it's a color visual with the renderIfTransparent property set as required.
75 * @param[in] controlImpl The control implementation
76 * @param[in] renderIfTransaparent Whether we should render if the color is transparent
78 void ChangeBackgroundColorVisual( Control& controlImpl, bool renderIfTransparent )
80 Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get( controlImpl );
82 Toolkit::Visual::Base backgroundVisual = controlDataImpl.GetVisual( Toolkit::Control::Property::BACKGROUND );
83 if( backgroundVisual )
86 backgroundVisual.CreatePropertyMap( map );
87 Property::Value* typeValue = map.Find( Toolkit::Visual::Property::TYPE );
88 if( typeValue && typeValue->Get< int >() == Toolkit::Visual::COLOR )
90 // Only change it if it's a color visual
91 map[ Toolkit::DevelColorVisual::Property::RENDER_IF_TRANSPARENT ] = renderIfTransparent;
92 controlImpl.SetBackground( map );
98 * @brief Creates a clipping renderer if required.
99 * (EG. If no renders exist and clipping is enabled).
100 * @param[in] controlImpl The control implementation.
102 void CreateClippingRenderer( Control& controlImpl )
104 // We want to add a transparent background if we do not have one for clipping.
105 Actor self( controlImpl.Self() );
106 int clippingMode = ClippingMode::DISABLED;
107 if( self.GetProperty( Actor::Property::CLIPPING_MODE ).Get( clippingMode ) )
109 switch( clippingMode )
111 case ClippingMode::CLIP_CHILDREN:
113 if( self.GetRendererCount() == 0u )
115 Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get( controlImpl );
116 if( controlDataImpl.mVisuals.Empty() )
118 controlImpl.SetBackgroundColor( Color::TRANSPARENT );
122 // We have visuals, check if we've set the background and re-create it to
123 // render even if transparent (only if it's a color visual)
124 ChangeBackgroundColorVisual( controlImpl, true );
130 case ClippingMode::DISABLED:
131 case ClippingMode::CLIP_TO_BOUNDING_BOX:
133 // If we have a background visual, check if it's a color visual and remove the render if transparent flag
134 ChangeBackgroundColorVisual( controlImpl, false );
141 } // unnamed namespace
144 Toolkit::Control Control::New()
146 // Create the implementation, temporarily owned on stack
147 IntrusivePtr<Control> controlImpl = new Control( ControlBehaviour( CONTROL_BEHAVIOUR_DEFAULT ) );
149 // Pass ownership to handle
150 Toolkit::Control handle( *controlImpl );
152 // Second-phase init of the implementation
153 // This can only be done after the CustomActor connection has been made...
154 controlImpl->Initialize();
159 void Control::SetStyleName( const std::string& styleName )
161 if( styleName != mImpl->mStyleName )
163 mImpl->mStyleName = styleName;
165 // Apply new style, if stylemanager is available
166 Toolkit::StyleManager styleManager = Toolkit::StyleManager::Get();
169 GetImpl( styleManager ).ApplyThemeStyle( Toolkit::Control( GetOwner() ) );
174 const std::string& Control::GetStyleName() const
176 return mImpl->mStyleName;
179 void Control::SetBackgroundColor( const Vector4& color )
181 mImpl->mBackgroundColor = color;
183 map[ Toolkit::Visual::Property::TYPE ] = Toolkit::Visual::COLOR;
184 map[ Toolkit::ColorVisual::Property::MIX_COLOR ] = color;
186 int clippingMode = ClippingMode::DISABLED;
187 if( ( Self().GetProperty( Actor::Property::CLIPPING_MODE ).Get( clippingMode ) ) &&
188 ( clippingMode == ClippingMode::CLIP_CHILDREN ) )
190 // If clipping-mode is set to CLIP_CHILDREN, then force visual to add the render even if transparent
191 map[ Toolkit::DevelColorVisual::Property::RENDER_IF_TRANSPARENT ] = true;
194 SetBackground( map );
197 void Control::SetBackground( const Property::Map& map )
199 Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual( map );
200 visual.SetName("background");
203 mImpl->RegisterVisual( Toolkit::Control::Property::BACKGROUND, visual, DepthIndex::BACKGROUND );
205 // Trigger a size negotiation request that may be needed by the new visual to relayout its contents.
210 void Control::ClearBackground()
212 mImpl->UnregisterVisual( Toolkit::Control::Property::BACKGROUND );
213 mImpl->mBackgroundColor = Color::TRANSPARENT;
215 // Trigger a size negotiation request that may be needed when unregistering a visual.
219 void Control::EnableGestureDetection(Gesture::Type type)
221 if ( (type & Gesture::Pinch) && !mImpl->mPinchGestureDetector )
223 mImpl->mPinchGestureDetector = PinchGestureDetector::New();
224 mImpl->mPinchGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PinchDetected);
225 mImpl->mPinchGestureDetector.Attach(Self());
228 if ( (type & Gesture::Pan) && !mImpl->mPanGestureDetector )
230 mImpl->mPanGestureDetector = PanGestureDetector::New();
231 mImpl->mPanGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PanDetected);
232 mImpl->mPanGestureDetector.Attach(Self());
235 if ( (type & Gesture::Tap) && !mImpl->mTapGestureDetector )
237 mImpl->mTapGestureDetector = TapGestureDetector::New();
238 mImpl->mTapGestureDetector.DetectedSignal().Connect(mImpl, &Impl::TapDetected);
239 mImpl->mTapGestureDetector.Attach(Self());
242 if ( (type & Gesture::LongPress) && !mImpl->mLongPressGestureDetector )
244 mImpl->mLongPressGestureDetector = LongPressGestureDetector::New();
245 mImpl->mLongPressGestureDetector.DetectedSignal().Connect(mImpl, &Impl::LongPressDetected);
246 mImpl->mLongPressGestureDetector.Attach(Self());
250 void Control::DisableGestureDetection(Gesture::Type type)
252 if ( (type & Gesture::Pinch) && mImpl->mPinchGestureDetector )
254 mImpl->mPinchGestureDetector.Detach(Self());
255 mImpl->mPinchGestureDetector.Reset();
258 if ( (type & Gesture::Pan) && mImpl->mPanGestureDetector )
260 mImpl->mPanGestureDetector.Detach(Self());
261 mImpl->mPanGestureDetector.Reset();
264 if ( (type & Gesture::Tap) && mImpl->mTapGestureDetector )
266 mImpl->mTapGestureDetector.Detach(Self());
267 mImpl->mTapGestureDetector.Reset();
270 if ( (type & Gesture::LongPress) && mImpl->mLongPressGestureDetector)
272 mImpl->mLongPressGestureDetector.Detach(Self());
273 mImpl->mLongPressGestureDetector.Reset();
277 PinchGestureDetector Control::GetPinchGestureDetector() const
279 return mImpl->mPinchGestureDetector;
282 PanGestureDetector Control::GetPanGestureDetector() const
284 return mImpl->mPanGestureDetector;
287 TapGestureDetector Control::GetTapGestureDetector() const
289 return mImpl->mTapGestureDetector;
292 LongPressGestureDetector Control::GetLongPressGestureDetector() const
294 return mImpl->mLongPressGestureDetector;
297 void Control::SetKeyboardNavigationSupport(bool isSupported)
299 mImpl->mIsKeyboardNavigationSupported = isSupported;
302 bool Control::IsKeyboardNavigationSupported()
304 return mImpl->mIsKeyboardNavigationSupported;
307 void Control::SetKeyInputFocus()
309 if( Self().OnStage() )
311 Toolkit::KeyInputFocusManager::Get().SetFocus(Toolkit::Control::DownCast(Self()));
315 bool Control::HasKeyInputFocus()
318 if( Self().OnStage() )
320 Toolkit::Control control = Toolkit::KeyInputFocusManager::Get().GetCurrentFocusControl();
321 if( Self() == control )
329 void Control::ClearKeyInputFocus()
331 if( Self().OnStage() )
333 Toolkit::KeyInputFocusManager::Get().RemoveFocus(Toolkit::Control::DownCast(Self()));
337 void Control::SetAsKeyboardFocusGroup(bool isFocusGroup)
339 mImpl->mIsKeyboardFocusGroup = isFocusGroup;
341 // The following line will be removed when the deprecated API in KeyboardFocusManager is deleted
342 Toolkit::KeyboardFocusManager::Get().SetAsFocusGroup(Self(), isFocusGroup);
345 bool Control::IsKeyboardFocusGroup()
347 return Toolkit::KeyboardFocusManager::Get().IsFocusGroup(Self());
350 void Control::AccessibilityActivate()
352 // Inform deriving classes
353 OnAccessibilityActivated();
356 void Control::KeyboardEnter()
358 // Inform deriving classes
362 bool Control::OnAccessibilityActivated()
364 if( Toolkit::KeyboardFocusManager::Get().SetCurrentFocusActor( Self() ) )
366 return OnKeyboardEnter();
371 bool Control::OnKeyboardEnter()
373 return false; // Keyboard enter is not handled by default
376 bool Control::OnAccessibilityPan(PanGesture gesture)
378 return false; // Accessibility pan gesture is not handled by default
381 bool Control::OnAccessibilityTouch(const TouchEvent& touchEvent)
383 return false; // Accessibility touch event is not handled by default
386 bool Control::OnAccessibilityValueChange(bool isIncrease)
388 return false; // Accessibility value change action is not handled by default
391 bool Control::OnAccessibilityZoom()
393 return false; // Accessibility zoom action is not handled by default
396 Actor Control::GetNextKeyboardFocusableActor(Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled)
401 void Control::OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor)
405 Toolkit::Control::KeyEventSignalType& Control::KeyEventSignal()
407 return mImpl->mKeyEventSignal;
410 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusGainedSignal()
412 return mImpl->mKeyInputFocusGainedSignal;
415 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusLostSignal()
417 return mImpl->mKeyInputFocusLostSignal;
420 bool Control::EmitKeyEventSignal( const KeyEvent& event )
422 // Guard against destruction during signal emission
423 Dali::Toolkit::Control handle( GetOwner() );
425 bool consumed = false;
427 consumed = mImpl->FilterKeyEvent( event );
429 // signals are allocated dynamically when someone connects
430 if ( !consumed && !mImpl->mKeyEventSignal.Empty() )
432 consumed = mImpl->mKeyEventSignal.Emit( handle, event );
437 // Notification for derived classes
438 consumed = OnKeyEvent(event);
444 Control::Control( ControlBehaviour behaviourFlags )
445 : CustomActorImpl( static_cast< ActorFlags >( behaviourFlags ) ),
446 mImpl(new Impl(*this))
448 mImpl->mFlags = behaviourFlags;
456 void Control::Initialize()
458 // Call deriving classes so initialised before styling is applied to them.
461 if( (mImpl->mFlags & REQUIRES_STYLE_CHANGE_SIGNALS) ||
462 !(mImpl->mFlags & DISABLE_STYLE_CHANGE_SIGNALS) )
464 Toolkit::StyleManager styleManager = StyleManager::Get();
466 // if stylemanager is available
469 StyleManager& styleManagerImpl = GetImpl( styleManager );
471 // Register for style changes
472 styleManagerImpl.ControlStyleChangeSignal().Connect( this, &Control::OnStyleChange );
474 // Apply the current style
475 styleManagerImpl.ApplyThemeStyleAtInit( Toolkit::Control( GetOwner() ) );
479 if( mImpl->mFlags & REQUIRES_KEYBOARD_NAVIGATION_SUPPORT )
481 SetKeyboardNavigationSupport( true );
485 Self().GetTypeInfo( type );
488 auto typeName = type.GetName();
489 DevelControl::AppendAccessibilityAttribute( Self(), "t", typeName );
492 if (Accessibility::IsUp())
493 mImpl->AccessibilityRegister();
496 void Control::OnInitialize()
500 void Control::OnControlChildAdd( Actor& child )
504 void Control::OnControlChildRemove( Actor& child )
508 void Control::OnStyleChange( Toolkit::StyleManager styleManager, StyleChange::Type change )
510 // By default the control is only interested in theme (not font) changes
511 if( styleManager && change == StyleChange::THEME_CHANGE )
513 GetImpl( styleManager ).ApplyThemeStyle( Toolkit::Control( GetOwner() ) );
518 void Control::OnPinch(const PinchGesture& pinch)
520 if( !( mImpl->mStartingPinchScale ) )
523 mImpl->mStartingPinchScale = new Vector3;
526 if( pinch.state == Gesture::Started )
528 *( mImpl->mStartingPinchScale ) = Self().GetCurrentScale();
531 Self().SetScale( *( mImpl->mStartingPinchScale ) * pinch.scale );
534 void Control::OnPan( const PanGesture& pan )
538 void Control::OnTap(const TapGesture& tap)
542 void Control::OnLongPress( const LongPressGesture& longPress )
546 void Control::EmitKeyInputFocusSignal( bool focusGained )
548 Dali::Toolkit::Control handle( GetOwner() );
550 if( Accessibility::IsUp() )
552 auto self = mImpl->GetAccessibilityObject( Self() );
553 self->EmitFocused( focusGained );
554 auto parent = self->GetParent();
555 if( parent && !self->GetStates()[Dali::Accessibility::State::MANAGES_DESCENDANTS] )
557 parent->EmitActiveDescendantChanged( parent, self );
563 // signals are allocated dynamically when someone connects
564 if ( !mImpl->mKeyInputFocusGainedSignal.Empty() )
566 mImpl->mKeyInputFocusGainedSignal.Emit( handle );
571 // signals are allocated dynamically when someone connects
572 if ( !mImpl->mKeyInputFocusLostSignal.Empty() )
574 mImpl->mKeyInputFocusLostSignal.Emit( handle );
579 void Control::OnStageConnection( int depth )
581 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "Control::OnStageConnection number of registered visuals(%d)\n", mImpl->mVisuals.Size() );
583 Actor self( Self() );
585 for(RegisteredVisualContainer::Iterator iter = mImpl->mVisuals.Begin(); iter!= mImpl->mVisuals.End(); iter++)
587 // Check whether the visual is empty and enabled
588 if( (*iter)->visual && (*iter)->enabled )
590 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "Control::OnStageConnection Setting visual(%d) on stage\n", (*iter)->index );
591 Toolkit::GetImplementation((*iter)->visual).SetOnStage( self );
595 // The clipping renderer is only created if required.
596 CreateClippingRenderer( *this );
598 // Request to be laid out when the control is connected to the Stage.
599 if( Accessibility::IsUp() )
601 mImpl->AccessibilityRegister();
606 void Control::OnStageDisconnection()
608 if( Accessibility::IsUp() )
610 mImpl->AccessibilityDeregister();
612 mImpl->OnStageDisconnection();
615 void Control::OnKeyInputFocusGained()
617 EmitKeyInputFocusSignal( true );
620 void Control::OnKeyInputFocusLost()
622 EmitKeyInputFocusSignal( false );
625 void Control::OnChildAdd(Actor& child)
627 // Notify derived classes.
628 OnControlChildAdd( child );
631 void Control::OnChildRemove(Actor& child)
633 // Notify derived classes.
634 OnControlChildRemove( child );
637 void Control::OnPropertySet( Property::Index index, Property::Value propertyValue )
639 // If the clipping mode has been set, we may need to create a renderer.
640 // Only do this if we are already on-stage as the OnStageConnection will handle the off-stage clipping controls.
643 case Actor::Property::CLIPPING_MODE:
645 if( Self().OnStage() )
647 // Note: This method will handle whether creation of the renderer is required.
648 CreateClippingRenderer( *this );
652 case Actor::Property::VISIBLE:
654 if( Dali::Accessibility::IsUp() )
656 Dali::Accessibility::Accessible::Get(Self())->EmitVisible( Self().GetProperty( Actor::Property::VISIBLE ).Get<bool>() );
660 case Toolkit::DevelControl::Property::ACCESSIBILITY_NAME:
662 if( Dali::Accessibility::IsUp() )
664 Dali::Accessibility::Accessible::Get(Self())->Emit( Dali::Accessibility::ObjectPropertyChangeEvent::NAME );
668 case Toolkit::DevelControl::Property::ACCESSIBILITY_ROLE:
670 if( Dali::Accessibility::IsUp() )
672 Dali::Accessibility::Accessible::Get(Self())->Emit( Dali::Accessibility::ObjectPropertyChangeEvent::ROLE );
676 case Toolkit::DevelControl::Property::ACCESSIBILITY_DESCRIPTON:
678 if( Dali::Accessibility::IsUp() )
680 Dali::Accessibility::Accessible::Get(Self())->Emit( Dali::Accessibility::ObjectPropertyChangeEvent::DESCRIPTION );
687 void Control::OnSizeSet(const Vector3& targetSize)
689 Toolkit::Visual::Base visual = mImpl->GetVisual( Toolkit::Control::Property::BACKGROUND );
692 Vector2 size( targetSize );
693 visual.SetTransformAndSize( Property::Map(), size ); // Send an empty map as we do not want to modify the visual's set transform
697 void Control::OnSizeAnimation(Animation& animation, const Vector3& targetSize)
699 // @todo size negotiate background to new size, animate as well?
702 bool Control::OnTouchEvent(const TouchEvent& event)
704 return false; // Do not consume
707 bool Control::OnHoverEvent(const HoverEvent& event)
709 return false; // Do not consume
712 bool Control::OnKeyEvent(const KeyEvent& event)
714 return false; // Do not consume
717 bool Control::OnWheelEvent(const WheelEvent& event)
719 return false; // Do not consume
722 void Control::OnRelayout( const Vector2& size, RelayoutContainer& container )
724 for( unsigned int i = 0, numChildren = Self().GetChildCount(); i < numChildren; ++i )
726 Actor child = Self().GetChildAt( i );
727 Vector2 newChildSize( size );
729 // When set the padding or margin on the control, child should be resized and repositioned.
730 if( ( mImpl->mPadding.start != 0 ) || ( mImpl->mPadding.end != 0 ) || ( mImpl->mPadding.top != 0 ) || ( mImpl->mPadding.bottom != 0 ) ||
731 ( mImpl->mMargin.start != 0 ) || ( mImpl->mMargin.end != 0 ) || ( mImpl->mMargin.top != 0 ) || ( mImpl->mMargin.bottom != 0 ) )
733 Extents padding = mImpl->mPadding;
735 Dali::CustomActor ownerActor(GetOwner());
736 Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>( ownerActor.GetProperty( Dali::Actor::Property::LAYOUT_DIRECTION ).Get<int>() );
738 if( Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection )
740 std::swap( padding.start, padding.end );
743 newChildSize.width = size.width - ( padding.start + padding.end );
744 newChildSize.height = size.height - ( padding.top + padding.bottom );
746 // Cannot use childs Position property as it can already have padding and margin applied on it,
747 // so we end up cumulatively applying them over and over again.
748 Vector2 childOffset( 0.f, 0.f );
749 childOffset.x += ( mImpl->mMargin.start + padding.start );
750 childOffset.y += ( mImpl->mMargin.top + padding.top );
752 child.SetPosition( childOffset.x, childOffset.y );
754 container.Add( child, newChildSize );
757 Toolkit::Visual::Base visual = mImpl->GetVisual( Toolkit::Control::Property::BACKGROUND );
760 visual.SetTransformAndSize( Property::Map(), size ); // Send an empty map as we do not want to modify the visual's set transform
764 void Control::OnSetResizePolicy( ResizePolicy::Type policy, Dimension::Type dimension )
768 Vector3 Control::GetNaturalSize()
770 DALI_LOG_INFO( gLogFilter, Debug::Verbose, "Control::GetNaturalSize for %s\n", Self().GetName().c_str() );
771 Toolkit::Visual::Base visual = mImpl->GetVisual( Toolkit::Control::Property::BACKGROUND );
775 visual.GetNaturalSize( naturalSize );
776 naturalSize.width += ( mImpl->mPadding.start + mImpl->mPadding.end );
777 naturalSize.height += ( mImpl->mPadding.top + mImpl->mPadding.bottom );
778 return Vector3( naturalSize );
780 return Vector3::ZERO;
783 float Control::CalculateChildSize( const Dali::Actor& child, Dimension::Type dimension )
785 return CalculateChildSizeBase( child, dimension );
788 float Control::GetHeightForWidth( float width )
790 return GetHeightForWidthBase( width );
793 float Control::GetWidthForHeight( float height )
795 return GetWidthForHeightBase( height );
798 bool Control::RelayoutDependentOnChildren( Dimension::Type dimension )
800 return RelayoutDependentOnChildrenBase( dimension );
803 void Control::OnCalculateRelayoutSize( Dimension::Type dimension )
807 void Control::OnLayoutNegotiated( float size, Dimension::Type dimension )
811 void Control::SignalConnected( SlotObserver* slotObserver, CallbackBase* callback )
813 mImpl->SignalConnected( slotObserver, callback );
816 void Control::SignalDisconnected( SlotObserver* slotObserver, CallbackBase* callback )
818 mImpl->SignalDisconnected( slotObserver, callback );
821 Control& GetImplementation( Dali::Toolkit::Control& handle )
823 CustomActorImpl& customInterface = handle.GetImplementation();
824 // downcast to control
825 Control& impl = dynamic_cast< Internal::Control& >( customInterface );
829 const Control& GetImplementation( const Dali::Toolkit::Control& handle )
831 const CustomActorImpl& customInterface = handle.GetImplementation();
832 // downcast to control
833 const Control& impl = dynamic_cast< const Internal::Control& >( customInterface );
837 } // namespace Internal
839 } // namespace Toolkit