X-Git-Url: http://review.tizen.org/git/?p=platform%2Fcore%2Fuifw%2Fdali-toolkit.git;a=blobdiff_plain;f=dali-toolkit%2Finternal%2Fcontrols%2Fslider%2Fslider-impl.cpp;h=3c48abc920721047244622dc5be72c6c36d03fb9;hp=915db02b7c92e4c722d2a5a94d40e4d3f3c6ba5d;hb=85c230140586e59cedeeda0d34b921a0cf661d7b;hpb=761122f3e8ff2b224d2329a911a78dc35177c5ea diff --git a/dali-toolkit/internal/controls/slider/slider-impl.cpp b/dali-toolkit/internal/controls/slider/slider-impl.cpp old mode 100755 new mode 100644 index 915db02..3c48abc --- a/dali-toolkit/internal/controls/slider/slider-impl.cpp +++ b/dali-toolkit/internal/controls/slider/slider-impl.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * Copyright (c) 2020 Samsung Electronics Co., Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -22,12 +22,13 @@ #include // for strcmp #include #include -#include +#include #include #include -#include // INTERNAL INCLUDES +#include +#include #include #include @@ -87,11 +88,11 @@ const float DEFAULT_HIT_HEIGHT = 72.0f; const float DEFAULT_HANDLE_HEIGHT = DEFAULT_HIT_HEIGHT; const float POPUP_TEXT_PADDING = 10.0f; -const char* SKINNED_TRACK_VISUAL = DALI_IMAGE_DIR "slider-skin.9.png"; -const char* SKINNED_HANDLE_VISUAL = DALI_IMAGE_DIR "slider-skin-handle.png"; -const char* SKINNED_PROGRESS_VISUAL = DALI_IMAGE_DIR "slider-skin-progress.9.png"; -const char* SKINNED_POPUP_VISUAL = DALI_IMAGE_DIR "slider-popup.9.png"; -const char* SKINNED_POPUP_ARROW_VISUAL = DALI_IMAGE_DIR "slider-popup-arrow.png"; +const char* SKINNED_TRACK_VISUAL_FILE_NAME = "slider-skin.9.png"; +const char* SKINNED_HANDLE_VISUAL_FILE_NAME = "slider-skin-handle.png"; +const char* SKINNED_PROGRESS_VISUAL_FILE_NAME = "slider-skin-progress.9.png"; +const char* SKINNED_POPUP_VISUAL_FILE_NAME = "slider-popup.9.png"; +const char* SKINNED_POPUP_ARROW_VISUAL_FILE_NAME = "slider-popup-arrow.png"; const Vector2 DEFAULT_HIT_REGION( DEFAULT_WIDTH, DEFAULT_HIT_HEIGHT ); const Vector2 DEFAULT_TRACK_REGION( DEFAULT_WIDTH, DEFAULT_HEIGHT ); @@ -102,7 +103,6 @@ const Vector4 DEFAULT_DISABLED_COLOR( 0.5f, 0.5f, 0.5f, 1.0f ); const float VALUE_POPUP_MARGIN = 10.0f; const float VALUE_POPUP_HEIGHT = 81.0f; const float VALUE_POPUP_MIN_WIDTH = 54.0f; -const Vector2 VALUE_POPUP_ARROW_SIZE( 18.0f, 18.0f ); const float DEFAULT_LOWER_BOUND = 0.0f; const float DEFAULT_UPPER_BOUND = 1.0f; @@ -135,7 +135,7 @@ Dali::Toolkit::Slider Slider::New() } Slider::Slider() -: Control( ControlBehaviour( REQUIRES_STYLE_CHANGE_SIGNALS ) ), +: Control( ControlBehaviour( CONTROL_BEHAVIOUR_DEFAULT ) ), mState( NORMAL ), mPopupVisual(""), mPopupArrowVisual(""), @@ -177,11 +177,12 @@ void Slider::OnInitialize() SetTrackRegion( DEFAULT_TRACK_REGION ); SetHandleSize( DEFAULT_HANDLE_SIZE ); - SetTrackVisual( SKINNED_TRACK_VISUAL ); - SetHandleVisual( SKINNED_HANDLE_VISUAL ); - SetProgressVisual( SKINNED_PROGRESS_VISUAL ); - SetPopupVisual( SKINNED_POPUP_VISUAL ); - SetPopupArrowVisual( SKINNED_POPUP_ARROW_VISUAL ); + const std::string imageDirPath = AssetManager::GetDaliImagePath(); + SetTrackVisual( imageDirPath + SKINNED_TRACK_VISUAL_FILE_NAME ); + SetHandleVisual( imageDirPath + SKINNED_HANDLE_VISUAL_FILE_NAME ); + SetProgressVisual( imageDirPath + SKINNED_PROGRESS_VISUAL_FILE_NAME ); + SetPopupVisual( imageDirPath + SKINNED_POPUP_VISUAL_FILE_NAME ); + SetPopupArrowVisual( imageDirPath + SKINNED_POPUP_ARROW_VISUAL_FILE_NAME ); SetShowPopup( DEFAULT_SHOW_POPUP ); SetShowValue( DEFAULT_SHOW_VALUE ); @@ -200,20 +201,29 @@ void Slider::OnInitialize() DisplayValue( mValue, false ); // Run this last to display the correct value // Size the Slider actor to a default - self.SetSize( DEFAULT_HIT_REGION.x, DEFAULT_HIT_REGION.y ); + self.SetProperty( Actor::Property::SIZE, Vector2( DEFAULT_HIT_REGION.x, DEFAULT_HIT_REGION.y ) ); + + // Set the Slider to be highlightable in Screen Reader mode + self.SetProperty( Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE, true ); // Connect to the touch signal - self.TouchSignal().Connect( this, &Slider::OnTouch ); + self.TouchedSignal().Connect( this, &Slider::OnTouch ); + + DevelControl::SetAccessibilityConstructor( self, []( Dali::Actor actor ) { + return std::unique_ptr< Dali::Accessibility::Accessible >( + new AccessibleImpl( actor, Dali::Accessibility::Role::SLIDER ) ); + } ); } -void Slider::OnSizeSet( const Vector3& size ) +void Slider::OnRelayout( const Vector2& size, RelayoutContainer& container ) { - // Factor in handle overshoot into size of track SetHitRegion( Vector2( size.x, GetHitRegion().y ) ); + // Factor in handle overshoot into size of backing SetTrackRegion( Vector2( size.x - GetHandleSize().x, GetTrackRegion().y ) ); + Control::OnRelayout( size, container ); } -bool Slider::OnTouch(Actor actor, const TouchData& touch) +bool Slider::OnTouch(Actor actor, const TouchEvent& touch) { if( mState != DISABLED ) { @@ -238,7 +248,7 @@ bool Slider::OnTouch(Actor actor, const TouchData& touch) } } - return true; + return false; } void Slider::OnPan( Actor actor, const PanGesture& gesture ) @@ -246,25 +256,25 @@ void Slider::OnPan( Actor actor, const PanGesture& gesture ) // gesture.position is in local actor coordinates if( mState != DISABLED ) { - switch( gesture.state ) + switch( gesture.GetState() ) { - case Gesture::Continuing: + case GestureState::CONTINUING: { if( mState == PRESSED ) { - float value = MapBounds( MarkFilter ( MapPercentage( gesture.position ) ), GetLowerBound(), GetUpperBound() ); + float value = MapBounds( MarkFilter ( MapPercentage( gesture.GetPosition() ) ), GetLowerBound(), GetUpperBound() ); SetValue( value ); DisplayPopup( value ); } break; } - case Gesture::Finished: + case GestureState::FINISHED: { if( mState == PRESSED ) { if( GetSnapToMarks() ) { - float value = MapBounds( SnapToMark( MapPercentage( gesture.position ) ), GetLowerBound(), GetUpperBound() ); + float value = MapBounds( SnapToMark( MapPercentage( gesture.GetPosition() ) ), GetLowerBound(), GetUpperBound() ); SetValue( value ); DisplayPopup( value ); } @@ -313,25 +323,25 @@ Slider::Domain Slider::CalcDomain( const Vector2& currentSize ) void Slider::DisplayValue( float value, bool raiseSignals ) { - float clampledValue = Clamp( value, GetLowerBound(), GetUpperBound() ); + float clampedValue = Clamp( value, GetLowerBound(), GetUpperBound() ); - float percent = MapValuePercentage( clampledValue ); + float percent = MapValuePercentage( clampedValue ); float x = mDomain.from.x + percent * ( mDomain.to.x - mDomain.from.x ); - mHandle.SetX( x ); + mHandle.SetProperty( Actor::Property::POSITION_X, x ); // Progress bar if( mProgress ) { - mProgress.SetSize( x, GetTrackRegion().y ); + mProgress.SetProperty( Actor::Property::SIZE, Vector2( x, GetTrackRegion().y ) ); } // Signals if( raiseSignals ) { Toolkit::Slider self = Toolkit::Slider::DownCast( Self() ); - mValueChangedSignal.Emit( self, clampledValue ); + mValueChangedSignal.Emit( self, clampedValue ); int markIndex; if( MarkReached( percent, markIndex ) ) @@ -344,9 +354,13 @@ void Slider::DisplayValue( float value, bool raiseSignals ) { std::stringstream ss; ss.precision( GetValuePrecision() ); - ss << std::fixed << clampledValue; + ss << std::fixed << clampedValue; - mHandleValueTextLabel.SetProperty( Toolkit::TextLabel::Property::TEXT, ss.str() ); + std::string label = mHandleValueTextLabel.GetProperty( Toolkit::TextLabel::Property::TEXT ); + if( label.compare(ss.str()) ) + { + mHandleValueTextLabel.SetProperty( Toolkit::TextLabel::Property::TEXT, ss.str() ); + } } } @@ -373,9 +387,9 @@ bool Slider::GetSnapToMarks() const Actor Slider::CreateHitRegion() { Actor hitRegion = Actor::New(); - hitRegion.SetParentOrigin( ParentOrigin::CENTER ); - hitRegion.SetAnchorPoint( AnchorPoint::CENTER ); - hitRegion.TouchSignal().Connect( this, &Slider::OnTouch ); + hitRegion.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER ); + hitRegion.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER ); + hitRegion.TouchedSignal().Connect( this, &Slider::OnTouch ); return hitRegion; } @@ -383,9 +397,9 @@ Actor Slider::CreateHitRegion() Toolkit::ImageView Slider::CreateTrack() { Toolkit::ImageView track = Toolkit::ImageView::New(); - track.SetParentOrigin( ParentOrigin::CENTER ); - track.SetAnchorPoint( AnchorPoint::CENTER ); - + track.SetProperty( Dali::Actor::Property::NAME,"SliderTrack"); + track.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER ); + track.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER ); return track; } @@ -424,7 +438,7 @@ void Slider::SetTrackVisual( Property::Map map ) mTrackRegion = size; if( mTrack ) { - mTrack.SetSize( mTrackRegion ); + mTrack.SetProperty( Actor::Property::SIZE, mTrackRegion ); } ResizeProgressRegion( Vector2( 0.0f, mTrackRegion.y ) ); @@ -445,8 +459,9 @@ std::string Slider::GetTrackVisual() Toolkit::ImageView Slider::CreateProgress() { Toolkit::ImageView progress = Toolkit::ImageView::New(); - progress.SetParentOrigin( ParentOrigin::CENTER_LEFT ); - progress.SetAnchorPoint( AnchorPoint::CENTER_LEFT ); + progress.SetProperty( Dali::Actor::Property::NAME,"SliderProgress"); + progress.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER_LEFT ); + progress.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER_LEFT ); return progress; } @@ -515,8 +530,9 @@ void Slider::CreatePopupImage( const std::string& filename ) { if( mPopup && ( filename.size() > 0 ) ) { - Image image = ResourceImage::New( filename ); - mPopup.SetImage( image ); + Property::Map map; + map[Toolkit::ImageVisual::Property::URL] = filename; + mPopup.SetProperty( Toolkit::ImageView::Property::IMAGE, map ); } } @@ -552,8 +568,9 @@ void Slider::CreatePopupArrowImage( const std::string& filename ) { if( mPopupArrow && ( filename.size() > 0 ) ) { - Image image = ResourceImage::New( filename ); - mPopupArrow.SetImage( image ); + Property::Map map; + map[Toolkit::ImageVisual::Property::URL] = filename; + mPopupArrow.SetProperty( Toolkit::ImageView::Property::IMAGE, map ); } } @@ -561,15 +578,16 @@ void Slider::ResizeProgressRegion( const Vector2& region ) { if( mProgress ) { - mProgress.SetSize( region ); + mProgress.SetProperty( Actor::Property::SIZE, region ); } } Toolkit::ImageView Slider::CreateHandle() { Toolkit::ImageView handle = Toolkit::ImageView::New(); - handle.SetParentOrigin( ParentOrigin::CENTER_LEFT ); - handle.SetAnchorPoint( AnchorPoint::CENTER ); + handle.SetProperty( Dali::Actor::Property::NAME,"SliderHandle"); + handle.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER_LEFT ); + handle.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER ); return handle; } @@ -577,8 +595,10 @@ Toolkit::ImageView Slider::CreateHandle() Toolkit::ImageView Slider::CreatePopupArrow() { Toolkit::ImageView arrow = Toolkit::ImageView::New(); - arrow.SetParentOrigin( ParentOrigin::BOTTOM_CENTER ); - arrow.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER ); + arrow.SetStyleName("SliderPopupArrow"); + arrow.SetProperty( Dali::Actor::Property::NAME,"SliderPopupArrow"); + arrow.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::BOTTOM_CENTER ); + arrow.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER ); return arrow; } @@ -586,20 +606,24 @@ Toolkit::ImageView Slider::CreatePopupArrow() Toolkit::TextLabel Slider::CreatePopupText() { Toolkit::TextLabel textLabel = Toolkit::TextLabel::New(); - textLabel.SetParentOrigin( ParentOrigin::CENTER ); - textLabel.SetAnchorPoint( AnchorPoint::CENTER ); + textLabel.SetProperty( Dali::Actor::Property::NAME, "SliderPopupTextLabel" ); + textLabel.SetStyleName( "SliderPopupTextLabel" ); + textLabel.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER ); + textLabel.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER ); textLabel.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::ALL_DIMENSIONS ); textLabel.SetProperty( Toolkit::TextLabel::Property::HORIZONTAL_ALIGNMENT, "CENTER" ); textLabel.SetProperty( Toolkit::TextLabel::Property::VERTICAL_ALIGNMENT, "CENTER" ); - textLabel.SetPadding( Padding( POPUP_TEXT_PADDING, POPUP_TEXT_PADDING, 0.0f, 0.0f ) ); + textLabel.SetProperty( Actor::Property::PADDING, Padding( POPUP_TEXT_PADDING, POPUP_TEXT_PADDING, 0.0f, 0.0f ) ); + textLabel.SetProperty( Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE, false ); return textLabel; } Toolkit::ImageView Slider::CreatePopup() { Toolkit::ImageView popup = Toolkit::ImageView::New(); - popup.SetParentOrigin( ParentOrigin::TOP_CENTER ); - popup.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER ); + popup.SetProperty( Dali::Actor::Property::NAME, "SliderPopup" ); + popup.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_CENTER ); + popup.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER ); popup.SetResizePolicy( ResizePolicy::FIT_TO_CHILDREN, Dimension::WIDTH ); mValueTextLabel = CreatePopupText(); @@ -659,7 +683,7 @@ void Slider::ResizeHandleSize( const Vector2& size ) { if( mHandle ) { - mHandle.SetSize( size ); + mHandle.SetProperty( Actor::Property::SIZE, size ); } } @@ -668,10 +692,13 @@ void Slider::CreateHandleValueDisplay() if( mHandle && !mHandleValueTextLabel ) { mHandleValueTextLabel = Toolkit::TextLabel::New(); - mHandleValueTextLabel.SetParentOrigin( ParentOrigin::CENTER ); - mHandleValueTextLabel.SetAnchorPoint( AnchorPoint::CENTER ); + mHandleValueTextLabel.SetProperty( Dali::Actor::Property::NAME,"SliderHandleTextLabel"); + mHandleValueTextLabel.SetStyleName("SliderHandleTextLabel"); + mHandleValueTextLabel.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::CENTER ); + mHandleValueTextLabel.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::CENTER ); mHandleValueTextLabel.SetProperty( Toolkit::TextLabel::Property::HORIZONTAL_ALIGNMENT, "CENTER" ); mHandleValueTextLabel.SetProperty( Toolkit::TextLabel::Property::VERTICAL_ALIGNMENT, "CENTER" ); + mHandleValueTextLabel.SetProperty( Toolkit::DevelControl::Property::ACCESSIBILITY_HIGHLIGHTABLE, false ); mHandle.Add( mHandleValueTextLabel ); } } @@ -684,14 +711,14 @@ void Slider::DestroyHandleValueDisplay() Actor Slider::CreateValueDisplay() { Actor popup = Actor::New(); - popup.SetParentOrigin( ParentOrigin::TOP_CENTER ); - popup.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER ); + popup.SetProperty( Actor::Property::PARENT_ORIGIN, ParentOrigin::TOP_CENTER ); + popup.SetProperty( Actor::Property::ANCHOR_POINT, AnchorPoint::BOTTOM_CENTER ); mPopupArrow = CreatePopupArrow(); popup.Add( mPopupArrow ); mPopup = CreatePopup(); - mPopup.SetSize( 0.0f, VALUE_POPUP_HEIGHT ); + mPopup.SetProperty( Actor::Property::SIZE, Vector2( 0.0f, VALUE_POPUP_HEIGHT ) ); mPopupArrow.Add( mPopup ); return popup; @@ -718,17 +745,17 @@ void Slider::UpdateSkin() { case NORMAL: { - mTrack.SetColor( Color::WHITE ); - mHandle.SetColor( Color::WHITE ); - mProgress.SetColor( Color::WHITE ); + mTrack.SetProperty( Actor::Property::COLOR, Color::WHITE ); + mHandle.SetProperty( Actor::Property::COLOR, Color::WHITE ); + mProgress.SetProperty( Actor::Property::COLOR, Color::WHITE ); break; } case DISABLED: { Vector4 disabledColor = GetDisabledColor(); - mTrack.SetColor( disabledColor ); - mHandle.SetColor( disabledColor ); - mProgress.SetColor( disabledColor ); + mTrack.SetProperty( Actor::Property::COLOR, disabledColor ); + mHandle.SetProperty( Actor::Property::COLOR, disabledColor ); + mProgress.SetProperty( Actor::Property::COLOR, disabledColor ); break; } case PRESSED: @@ -772,7 +799,7 @@ void Slider::SetHitRegion( const Vector2& size ) if( mHitArea ) { - mHitArea.SetSize( mHitRegion ); + mHitArea.SetProperty( Actor::Property::SIZE, mHitRegion ); } } @@ -786,7 +813,7 @@ void Slider::AddPopup() if( !mValueDisplay ) { mValueDisplay = CreateValueDisplay(); - mValueDisplay.SetVisible( false ); + mValueDisplay.SetProperty( Actor::Property::VISIBLE, false ); mHandle.Add( mValueDisplay ); CreatePopupImage( GetPopupVisual() ); @@ -901,7 +928,7 @@ bool Slider::HideValueView() { if( mValueDisplay ) { - mValueDisplay.SetVisible( false ); + mValueDisplay.SetProperty( Actor::Property::VISIBLE, false ); } return false; @@ -946,7 +973,7 @@ void Slider::SetTrackRegion( const Vector2& region ) if( mTrack ) { - mTrack.SetSize( mTrackRegion ); + mTrack.SetProperty( Actor::Property::SIZE, mTrackRegion ); } ResizeProgressRegion( Vector2( 0.0f, mTrackRegion.y ) ); @@ -1104,7 +1131,7 @@ void Slider::DisplayPopup( float value ) if( mValueDisplay ) { - mValueDisplay.SetVisible( true ); + mValueDisplay.SetProperty( Actor::Property::VISIBLE, true ); mValueTimer.SetInterval( VALUE_VIEW_SHOW_DURATION ); } @@ -1363,8 +1390,15 @@ Property::Value Slider::GetProperty( BaseObject* object, Property::Index propert case Toolkit::Slider::Property::MARKS: { - // TODO: Need to be able to return a PropertyArray - // value = sliderImpl.GetMarks(); + Property::Value value1( Property::ARRAY ); + Property::Array* markArray = value1.GetArray(); + + if( markArray ) + { + *markArray = sliderImpl.GetMarks(); + } + + value = value1; break; } @@ -1385,6 +1419,83 @@ Property::Value Slider::GetProperty( BaseObject* object, Property::Index propert return value; } +double Slider::AccessibleImpl::GetMinimum() +{ + auto p = Toolkit::Slider::DownCast( self ); + return p.GetProperty( Toolkit::Slider::Property::LOWER_BOUND ).Get< float >(); +} + +double Slider::AccessibleImpl::GetCurrent() +{ + auto p = Toolkit::Slider::DownCast( self ); + return p.GetProperty( Toolkit::Slider::Property::VALUE ).Get< float >(); +} + +double Slider::AccessibleImpl::GetMaximum() +{ + auto p = Toolkit::Slider::DownCast( self ); + return p.GetProperty( Toolkit::Slider::Property::UPPER_BOUND ).Get< float >(); +} + +bool Slider::AccessibleImpl::SetCurrent( double current ) +{ + if (current < GetMinimum() || current > GetMaximum()) + return false; + + auto p = Toolkit::Slider::DownCast( self ); + auto &impl = Toolkit::GetImpl(p); + + const float prev = p.GetProperty(Toolkit::Slider::Property::VALUE); + float next = static_cast(current); + + if (fabsf(next - prev) < Math::MACHINE_EPSILON_0) + { + // do nothing + } + else if (p.GetProperty(Toolkit::Slider::Property::SNAP_TO_MARKS)) + { + auto marks = p.GetProperty(Toolkit::Slider::Property::MARKS); + + int prevIdx; + if (impl.MarkReached(impl.MapValuePercentage(prev), prevIdx)) + { + int nextIdx = prevIdx; + nextIdx += (next > prev) ? 1 : -1; + + if (nextIdx < 0 || nextIdx >= static_cast(marks.Count())) + return false; + + next = marks[nextIdx].Get(); + } + else + { + next = impl.MapBounds(impl.SnapToMark(impl.MapValuePercentage(next)), impl.GetLowerBound(), impl.GetUpperBound()); + } + } + else + { + next = impl.MapBounds(impl.MarkFilter(impl.MapValuePercentage(next)), impl.GetLowerBound(), impl.GetUpperBound()); + } + + impl.SetValue(next); + impl.DisplayPopup(next); + + return true; +} + +double Slider::AccessibleImpl::GetMinimumIncrement() +{ + auto p = Toolkit::Slider::DownCast( self ); + + bool hasMarks = !p.GetProperty(Toolkit::Slider::Property::MARKS).Empty(); + float tolerance = p.GetProperty(Toolkit::Slider::Property::MARK_TOLERANCE); + + if (!hasMarks || fabsf(tolerance) < 0.01) + return 0.0; // let screen-reader choose the increment + + return Math::MACHINE_EPSILON_10000 + tolerance * (GetMaximum() - GetMinimum()); +} + } // namespace Internal } // namespace Toolkit