Scrollable UI element for showing a (possibly large) child element. More...

#include </home/runner/work/urho3d-doxygen.github.io/urho3d-doxygen.github.io/urho3d_repo/Source/Urho3D/UI/ScrollView.h>

Inheritance diagram for Urho3D::ScrollView:

Public Member Functions
	ScrollView (Context *context)
	Construct.

	~ScrollView () override
	Destruct.

void	Update (float timeStep) override
	Perform UI element update. More...

void	ApplyAttributes () override
	Apply attribute changes that can not be applied immediately. More...

void	OnWheel (int delta, MouseButtonFlags buttons, QualifierFlags qualifiers) override
	React to mouse wheel. More...

void	OnKey (Key key, MouseButtonFlags buttons, QualifierFlags qualifiers) override
	React to a key press. More...

void	OnResize (const IntVector2 &newSize, const IntVector2 &delta) override
	React to resize. More...

bool	IsWheelHandler () const override
	Return whether the element could handle wheel input. More...

void	SetContentElement (UIElement *element)
	Set content element.

void	SetViewPosition (const IntVector2 &position)
	Set view offset from the top-left corner.

void	SetViewPosition (int x, int y)
	Set view offset from the top-left corner.

void	SetScrollBarsVisible (bool horizontal, bool vertical)
	Set scrollbars' visibility manually. Disables scrollbar autoshow/hide.

void	SetHorizontalScrollBarVisible (bool visible)
	Set horizontal scrollbar visibility manually. Disables scrollbar autoshow/hide.

void	SetVerticalScrollBarVisible (bool visible)
	Set vertical scrollbar visibility manually. Disables scrollbar autoshow/hide.

void	SetScrollBarsAutoVisible (bool enable)
	Set whether to automatically show/hide scrollbars. Default true.

void	SetScrollStep (float step)
	Set arrow key scroll step. Also sets it on the scrollbars.

void	SetPageStep (float step)
	Set arrow key page step.

void	SetScrollDeceleration (float deceleration)
	Set scroll deceleration.

void	SetScrollSnapEpsilon (float snap)
	Set scroll snap epsilon.

void	SetAutoDisableChildren (bool disable)
	Set whether child elements should be disabled while touch scrolling.

void	SetAutoDisableThreshold (float amount)
	Set how much touch movement is needed to trigger child element disabling.

const IntVector2 &	GetViewPosition () const
	Return view offset from the top-left corner.

UIElement *	GetContentElement () const
	Return content element.

ScrollBar *	GetHorizontalScrollBar () const
	Return horizontal scroll bar.

ScrollBar *	GetVerticalScrollBar () const
	Return vertical scroll bar.

BorderImage *	GetScrollPanel () const
	Return scroll panel.

bool	GetScrollBarsAutoVisible () const
	Return whether scrollbars are automatically shown/hidden.

bool	GetHorizontalScrollBarVisible () const
	Return whether the horizontal scrollbar is visible.

bool	GetVerticalScrollBarVisible () const
	Return whether the vertical scrollbar is visible.

float	GetScrollStep () const
	Return arrow key scroll step.

float	GetPageStep () const
	Return arrow key page step.

float	GetScrollDeceleration () const
	Return scroll deceleration.

float	GetScrollSnapEpsilon () const
	Return scroll snap epsilon.

bool	GetAutoDisableChildren () const
	Return whether child element will be disabled while touch scrolling.

float	GetAutoDisableThreshold () const
	Return how much touch movement is needed to trigger child element disabling.

void	SetViewPositionAttr (const IntVector2 &value)
	Set view position attribute.

Public Member Functions inherited from Urho3D::UIElement
	UIElement (Context *context)
	Construct.

	~UIElement () override
	Destruct.

void	ApplyAttributes () override
	Apply attribute changes that can not be applied immediately. More...

bool	LoadXML (const XMLElement &source) override
	Load from XML data. Return true if successful. More...

virtual bool	LoadXML (const XMLElement &source, XMLFile *styleFile)
	Load from XML data with style. Return true if successful. More...

virtual UIElement *	LoadChildXML (const XMLElement &childElem, XMLFile *styleFile)
	Create a child by loading from XML data with style. Returns the child element if successful, null if otherwise.

bool	SaveXML (XMLElement &dest) const override
	Save as XML data. Return true if successful. More...

virtual void	Update (float timeStep)
	Perform UI element update. More...

virtual bool	IsWithinScissor (const IntRect &currentScissor)
	Return whether is visible and inside a scissor rectangle and should be rendered. More...

virtual const IntVector2 &	GetScreenPosition () const
	Update and return screen position. More...

virtual void	GetBatches (Vector< UIBatch > &batches, Vector< float > &vertexData, const IntRect &currentScissor)
	Return UI rendering batches. More...

virtual void	GetDebugDrawBatches (Vector< UIBatch > &batches, Vector< float > &vertexData, const IntRect &currentScissor)
	Return UI rendering batches for debug draw.

virtual void	OnHover (const IntVector2 &position, const IntVector2 &screenPosition, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse hover. More...

virtual void	OnClickBegin (const IntVector2 &position, const IntVector2 &screenPosition, MouseButton button, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse click begin. More...

virtual void	OnClickEnd (const IntVector2 &position, const IntVector2 &screenPosition, MouseButton button, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor cursor, UIElement beginElement)
	React to mouse click end. More...

virtual void	OnDoubleClick (const IntVector2 &position, const IntVector2 &screenPosition, MouseButton button, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to double mouse click. More...

virtual void	OnDragBegin (const IntVector2 &position, const IntVector2 &screenPosition, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse drag begin. More...

virtual void	OnDragMove (const IntVector2 &position, const IntVector2 &screenPosition, const IntVector2 &deltaPos, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse drag motion. More...

virtual void	OnDragEnd (const IntVector2 &position, const IntVector2 &screenPosition, MouseButtonFlags dragButtons, MouseButtonFlags releaseButtons, Cursor *cursor)
	React to mouse drag end. More...

virtual void	OnDragCancel (const IntVector2 &position, const IntVector2 &screenPosition, MouseButtonFlags dragButtons, MouseButtonFlags cancelButtons, Cursor *cursor)
	React to a mouse drag cancel event (ie, when an extra button is pressed). More...

virtual bool	OnDragDropTest (UIElement *source)
	React to drag and drop test. Return true to signal that the drop is acceptable. More...

virtual bool	OnDragDropFinish (UIElement *source)
	React to drag and drop finish. Return true to signal that the drop was accepted. More...

virtual void	OnWheel (int delta, MouseButtonFlags buttons, QualifierFlags qualifiers)
	React to mouse wheel. More...

virtual void	OnKey (Key key, MouseButtonFlags buttons, QualifierFlags qualifiers)
	React to a key press. More...

virtual void	OnTextInput (const String &text)
	React to text input event. More...

virtual void	OnResize (const IntVector2 &newSize, const IntVector2 &delta)
	React to resize. More...

virtual void	OnPositionSet (const IntVector2 &newPosition)
	React to position change. More...

virtual void	OnSetEditable ()
	React to editable status change. More...

virtual void	OnIndentSet ()
	React to indent change. More...

virtual IntVector2	ScreenToElement (const IntVector2 &screenPosition)
	Convert screen coordinates to element coordinates. More...

virtual IntVector2	ElementToScreen (const IntVector2 &position)
	Convert element coordinates to screen coordinates. More...

virtual bool	IsWheelHandler () const
	Return whether the element could handle wheel input. More...

bool	LoadXML (Deserializer &source)
	Load from an XML file. Return true if successful.

bool	SaveXML (Serializer &dest, const String &indentation="\t") const
	Save to an XML file. Return true if successful.

bool	FilterAttributes (XMLElement &dest) const
	Filter attributes in serialization process.

void	SetName (const String &name)
	Set name.

void	SetPosition (const IntVector2 &position)
	Set position.

void	SetPosition (int x, int y)
	Set position.

void	SetSize (const IntVector2 &size)
	Set size.

void	SetSize (int width, int height)
	Set size.

void	SetWidth (int width)
	Set width only.

void	SetHeight (int height)
	Set height only.

void	SetMinSize (const IntVector2 &minSize)
	Set minimum size.

void	SetMinSize (int width, int height)
	Set minimum size.

void	SetMinWidth (int width)
	Set minimum width.

void	SetMinHeight (int height)
	Set minimum height.

void	SetMaxSize (const IntVector2 &maxSize)
	Set maximum size.

void	SetMaxSize (int width, int height)
	Set maximum size.

void	SetMaxWidth (int width)
	Set maximum width.

void	SetMaxHeight (int height)
	Set maximum height.

void	SetFixedSize (const IntVector2 &size)
	Set fixed size.

void	SetFixedSize (int width, int height)
	Set fixed size.

void	SetFixedWidth (int width)
	Set fixed width.

void	SetFixedHeight (int height)
	Set fixed height.

void	SetAlignment (HorizontalAlignment hAlign, VerticalAlignment vAlign)
	Set horizontal and vertical alignment.

void	SetHorizontalAlignment (HorizontalAlignment align)
	Set horizontal alignment.

void	SetVerticalAlignment (VerticalAlignment align)
	Set vertical alignment.

void	SetEnableAnchor (bool enable)
	Enable automatic positioning & sizing of the element relative to its parent using min/max anchor and min/max offset. Default false.

void	SetMinAnchor (const Vector2 &anchor)
	Set minimum (top left) anchor in relation to the parent element (from 0 to 1). No effect when anchor is not enabled.

void	SetMinAnchor (float x, float y)
	Set minimum anchor.

void	SetMaxAnchor (const Vector2 &anchor)
	Set maximum (bottom right) anchor in relation to the parent element (from 0 to 1). No effect when anchor is not enabled.

void	SetMaxAnchor (float x, float y)
	Set maximum anchor.

void	SetMinOffset (const IntVector2 &offset)
	Set offset of element's top left from the minimum anchor in pixels. No effect when anchor is not enabled.

void	SetMaxOffset (const IntVector2 &offset)
	Set offset of element's bottom right from the maximum anchor in pixels. No effect when anchor is not enabled.

void	SetPivot (const Vector2 &pivot)
	Set pivot relative to element's size (from 0 to 1, where 0.5 is center). Overrides horizontal & vertical alignment.

void	SetPivot (float x, float y)
	Set pivot relative to element's size (from 0 to 1, where 0.5 is center). Overrides horizontal & vertical alignment.

void	SetClipBorder (const IntRect &rect)
	Set child element clipping border.

void	SetColor (const Color &color)
	Set color on all corners.

void	SetColor (Corner corner, const Color &color)
	Set color on one corner.

void	SetPriority (int priority)
	Set priority.

void	SetOpacity (float opacity)
	Set opacity.

void	SetBringToFront (bool enable)
	Set whether should be brought to front when focused.

void	SetBringToBack (bool enable)
	Set whether should be put to background when another element is focused.

void	SetClipChildren (bool enable)
	Set whether should clip child elements. Default false.

void	SetSortChildren (bool enable)
	Set whether should sort child elements according to priority. Default true.

void	SetUseDerivedOpacity (bool enable)
	Set whether parent elements' opacity affects opacity. Default true.

void	SetEnabled (bool enable)
	Set whether reacts to input. Default false, but is enabled by subclasses if applicable.

void	SetDeepEnabled (bool enable)
	Set enabled state on self and child elements. Elements' own enabled state is remembered (IsEnabledSelf) and can be restored.

void	ResetDeepEnabled ()
	Reset enabled state to the element's remembered state prior to calling SetDeepEnabled.

void	SetEnabledRecursive (bool enable)
	Set enabled state on self and child elements. Unlike SetDeepEnabled this does not remember the elements' own enabled state, but overwrites it.

void	SetEditable (bool enable)
	Set whether value is editable through input. Not applicable to all elements. Default true.

void	SetFocus (bool enable)
	Set whether is focused. Only one element can be focused at a time.

void	SetSelected (bool enable)
	Set selected mode. Actual meaning is element dependent, for example constant hover or pressed effect.

void	SetVisible (bool enable)
	Set whether is visible. Visibility propagates to child elements.

void	SetFocusMode (FocusMode mode)
	Set focus mode.

void	SetDragDropMode (DragAndDropModeFlags mode)
	Set drag and drop flags.

bool	SetStyle (const String &styleName, XMLFile *file=nullptr)
	Set style from an XML file. Find the style element by name. If the style file is not explicitly provided, use the default style from parental chain. Return true if the style is applied successfully. See also Defining UI layouts programmatically.

bool	SetStyle (const XMLElement &element)
	Set style from an XML element. Return true if the style is applied successfully.

bool	SetStyleAuto (XMLFile *file=nullptr)
	Set style from an XML file. Find the style element automatically by using the element's typename. If the style file is not explicitly provided, use the default style from parental chain. Return true if the style is applied successfully. See also Defining UI layouts programmatically.

void	SetDefaultStyle (XMLFile *style)
	Set default style file for later use by children elements.

void	SetLayout (LayoutMode mode, int spacing=0, const IntRect &border=IntRect::ZERO)
	Set layout parameters.

void	SetLayoutMode (LayoutMode mode)
	Set layout mode only.

void	SetLayoutSpacing (int spacing)
	Set layout spacing.

void	SetLayoutBorder (const IntRect &border)
	Set layout border.

void	SetLayoutFlexScale (const Vector2 &scale)
	Set layout flex scale.

void	SetIndent (int indent)
	Set horizontal indentation.

void	SetIndentSpacing (int indentSpacing)
	Set indent spacing (number of pixels per indentation level).

void	UpdateLayout ()
	Manually update layout. Should not be necessary in most cases, but is provided for completeness.

void	DisableLayoutUpdate ()
	Disable automatic layout update. Should only be used if there are performance problems.

void	EnableLayoutUpdate ()
	Enable automatic layout update.

void	BringToFront ()
	Bring UI element to front.

UIElement *	CreateChild (StringHash type, const String &name=String::EMPTY, i32 index=ENDPOS)
	Create and add a child element and return it.

void	AddChild (UIElement *element)
	Add a child element.

void	InsertChild (i32 index, UIElement *element)
	Insert a child element into a specific position in the child list. index can be ENDPOS.

void	RemoveChild (UIElement *element, i32 index=0)
	Remove a child element. Starting search at specified index if provided.

void	RemoveChildAtIndex (i32 index)
	Remove a child element at index.

void	RemoveAllChildren ()
	Remove all child elements.

void	Remove ()
	Remove from the parent element. If no other shared pointer references exist, causes immediate deletion.

i32	FindChild (UIElement *element) const
	Find child index. Return NINDEX if not found.

void	SetParent (UIElement *parent, i32 index=ENDPOS)
	Set parent element. Same as parent->InsertChild(index, this).

void	SetVar (StringHash key, const Variant &value)
	Set a user variable.

void	SetInternal (bool enable)
	Mark as internally (programmatically) created. Used when an element composes itself out of child elements.

void	SetTraversalMode (TraversalMode traversalMode)
	Set traversal mode for rendering. The default traversal mode is TM_BREADTH_FIRST for non-root element. Root element should be set to TM_DEPTH_FIRST to avoid artifacts during rendering.

void	SetElementEventSender (bool flag)
	Set element event sender flag. When child element is added or deleted, the event would be sent using UIElement found in the parental chain having this flag set. If not set, the event is sent using UI's root as per normal.

void	SetTags (const StringVector &tags)
	Set tags. Old tags are overwritten.

void	AddTag (const String &tag)
	Add a tag.

void	AddTags (const String &tags, char separator=';')
	Add tags with the specified separator (; by default).

void	AddTags (const StringVector &tags)
	Add tags.

bool	RemoveTag (const String &tag)
	Remove specific tag. Return true if existed.

void	RemoveAllTags ()
	Remove all tags.

template<class T >
T *	CreateChild (const String &name=String::EMPTY, i32 index=ENDPOS)
	Template version of creating a child element.

template<class T >
T *	GetChildStaticCast (i32 index) const
	Template version of returning child element by index using static cast.

template<class T >
T *	GetChildStaticCast (const String &name, bool recursive=false) const
	Template version of returning child element by name using static cast.

template<class T >
T *	GetChildStaticCast (const StringHash &key, const Variant &value=Variant::EMPTY, bool recursive=false) const
	Template version of returning child element by variable using static cast. If only key is provided, return the first child having the matching variable key. If value is also provided then the actual variable value would also be checked against.

template<class T >
T *	GetChildDynamicCast (i32 index) const
	Template version of returning child element by index using dynamic cast. May return 0 when casting failed.

template<class T >
T *	GetChildDynamicCast (const String &name, bool recursive=false) const
	Template version of returning child element by name using dynamic cast. May return 0 when casting failed.

template<class T >
T *	GetChildDynamicCast (const StringHash &key, const Variant &value=Variant::EMPTY, bool recursive=false) const
	Template version of returning child element by variable. If only key is provided, return the first child having the matching variable key. If value is also provided then the actual variable value would also be checked against using dynamic cast. May return 0 when casting failed.

const String &	GetName () const
	Return name.

const IntVector2 &	GetPosition () const
	Return position.

const IntVector2 &	GetSize () const
	Return size.

int	GetWidth () const
	Return width.

int	GetHeight () const
	Return height.

const IntVector2 &	GetMinSize () const
	Return minimum size.

int	GetMinWidth () const
	Return minimum width.

int	GetMinHeight () const
	Return minimum height.

const IntVector2 &	GetMaxSize () const
	Return maximum size.

int	GetMaxWidth () const
	Return minimum width.

int	GetMaxHeight () const
	Return minimum height.

bool	IsFixedSize () const
	Return true if size is fixed.

bool	IsFixedWidth () const
	Return true if width is fixed.

bool	IsFixedHeight () const
	Return true if height is fixed.

const IntVector2 &	GetChildOffset () const
	Return child element offset.

HorizontalAlignment	GetHorizontalAlignment () const
	Return horizontal alignment. If pivot has been adjusted to a custom horizontal setting, returns HA_CUSTOM.

VerticalAlignment	GetVerticalAlignment () const
	Return vertical alignment. If pivot has been adjusted to a custom vertical setting, returns VA_CUSTOM.

bool	GetEnableAnchor () const
	Return whether anchor positioning & sizing is enabled.

const Vector2 &	GetMinAnchor () const
	Return minimum anchor.

const Vector2 &	GetMaxAnchor () const
	Return maximum anchor.

const IntVector2 &	GetMinOffset () const

const IntVector2 &	GetMaxOffset () const

const Vector2 &	GetPivot () const
	Return pivot.

const IntRect &	GetClipBorder () const
	Return child element clipping border.

const Color &	GetColor (Corner corner) const
	Return corner color.

int	GetPriority () const
	Return priority.

float	GetOpacity () const
	Return opacity.

float	GetDerivedOpacity () const
	Return derived opacity (affected by parent elements). If UseDerivedOpacity is false, returns same as element's own opacity.

bool	GetBringToFront () const
	Return whether should be brought to front when focused.

bool	GetBringToBack () const
	Return whether should be put to background when another element is focused.

bool	GetClipChildren () const
	Return whether should clip child elements.

bool	GetSortChildren () const
	Return whether should sort child elements according to priority.

bool	GetUseDerivedOpacity () const
	Return whether parent elements' opacity affects opacity.

bool	HasFocus () const
	Return whether has focus.

bool	IsChildOf (UIElement *element) const
	Return whether is a direct or indirect child of specified element.

bool	IsEnabled () const
	Return whether reacts to input.

bool	IsEnabledSelf () const
	Returns the element's last own enabled state. May be different than the value returned by IsEnabled when SetDeepEnabled has been used.

bool	IsEditable () const
	Return whether value is editable through input.

bool	IsSelected () const
	Return whether is selected. Actual meaning is element dependent.

bool	IsVisible () const
	Return whether element itself should be visible. Elements can be also hidden due to the parent being not visible, use IsVisibleEffective() to check.

bool	IsVisibleEffective () const
	Return whether element is effectively visible (parent element chain is visible).

bool	IsHovering () const
	Return whether the cursor is hovering on this element.

bool	IsInternal () const
	Return whether is internally created.

bool	HasColorGradient () const
	Return whether has different color in at least one corner.

FocusMode	GetFocusMode () const
	Return focus mode.

DragAndDropModeFlags	GetDragDropMode () const
	Return drag and drop flags.

const String &	GetAppliedStyle () const
	Return applied style name. Return an empty string when the applied style is an 'auto' style (i.e. style derived from instance's type).

XMLFile *	GetDefaultStyle (bool recursiveUp=true) const
	Return default style.

LayoutMode	GetLayoutMode () const
	Return layout mode.

int	GetLayoutSpacing () const
	Return layout spacing.

const IntRect &	GetLayoutBorder () const
	Return layout border.

const Vector2 &	GetLayoutFlexScale () const
	Return layout flex scale.

i32	GetNumChildren (bool recursive=false) const
	Return number of child elements.

UIElement *	GetChild (i32 index) const
	Return child element by index.

UIElement *	GetChild (const String &name, bool recursive=false) const
	Return child element by name.

UIElement *	GetChild (const StringHash &key, const Variant &value=Variant::EMPTY, bool recursive=false) const
	Return child element by variable. If only key is provided, return the first child having the matching variable key. If value is also provided then the actual variable value would also be checked against.

const Vector< SharedPtr< UIElement > > &	GetChildren () const
	Return immediate child elements.

void	GetChildren (Vector< UIElement * > &dest, bool recursive=false) const
	Return child elements either recursively or non-recursively.

Vector< UIElement * >	GetChildren (bool recursive) const
	Return child elements, optionally recursive.

UIElement *	GetParent () const
	Return parent element.

UIElement *	GetRoot () const
	Return root element.

const Color &	GetDerivedColor () const
	Return derived color. Only valid when no gradient.

const Variant &	GetVar (const StringHash &key) const
	Return a user variable.

const VariantMap &	GetVars () const
	Return all user variables.

bool	HasTag (const String &tag) const
	Return whether element is tagged by a specific tag.

const StringVector &	GetTags () const
	Return all tags.

void	GetChildrenWithTag (Vector< UIElement * > &dest, const String &tag, bool recursive=false) const
	Return child elements with a specific tag either recursively or non-recursively.

Vector< UIElement * >	GetChildrenWithTag (const String &tag, bool recursive=false) const
	Return child elements with a specific tag either recursively or non-recursively.

MouseButtonFlags	GetDragButtonCombo () const
	Return the drag button combo if this element is being dragged.

i32	GetDragButtonCount () const
	Return the number of buttons dragging this element.

bool	IsInside (IntVector2 position, bool isScreen)
	Return whether a point (either in element or screen coordinates) is inside the element.

bool	IsInsideCombined (IntVector2 position, bool isScreen)
	Return whether a point (either in element or screen coordinates) is inside the combined rect of the element and its children.

IntRect	GetCombinedScreenRect ()
	Return combined screen coordinate rect of element and its children.

void	SortChildren ()
	Sort child elements if sorting enabled and order dirty. Called by UI.

int	GetLayoutElementMaxSize () const
	Return maximum layout element size in the layout direction. Only valid after layout has been calculated. Used internally by UI for optimizations.

int	GetIndent () const
	Return horizontal indentation.

int	GetIndentSpacing () const
	Return indent spacing (number of pixels per indentation level).

int	GetIndentWidth () const
	Return indent width in pixels.

void	SetChildOffset (const IntVector2 &offset)
	Set child offset.

void	SetHovering (bool enable)
	Set hovering state.

void	AdjustScissor (IntRect &currentScissor)
	Adjust scissor for rendering.

void	GetBatchesWithOffset (IntVector2 &offset, Vector< UIBatch > &batches, Vector< float > &vertexData, IntRect currentScissor)
	Get UI rendering batches with a specified offset. Also recurse to child elements.

const Color &	GetColorAttr () const
	Return color attribute. Uses just the top-left color.

TraversalMode	GetTraversalMode () const
	Return traversal mode for rendering.

bool	IsElementEventSender () const
	Return whether element should send child added / removed events by itself. If false, defers to parent element.

UIElement *	GetElementEventSender () const
	Get element which should send child added / removed events.

IntVector2	GetEffectiveMinSize () const
	Return effective minimum size, also considering layout. Used internally.

void	SetRenderTexture (Texture2D *texture)
	Set texture to which element will be rendered.

Public Member Functions inherited from Urho3D::Animatable
	Animatable (Context *context)
	Construct.

	~Animatable () override
	Destruct.

bool	LoadXML (const XMLElement &source) override
	Load from XML data. Return true if successful. More...

bool	SaveXML (XMLElement &dest) const override
	Save as XML data. Return true if successful. More...

bool	LoadJSON (const JSONValue &source) override
	Load from JSON data. Return true if successful. More...

bool	SaveJSON (JSONValue &dest) const override
	Save as JSON data. Return true if successful. More...

void	SetAnimationEnabled (bool enable)
	Set automatic update of animation, default true.

void	SetAnimationTime (float time)
	Set time position of all attribute animations or an object animation manually. Automatic update should be disabled in this case.

void	SetObjectAnimation (ObjectAnimation *objectAnimation)
	Set object animation.

void	SetAttributeAnimation (const String &name, ValueAnimation *attributeAnimation, WrapMode wrapMode=WM_LOOP, float speed=1.0f)
	Set attribute animation.

void	SetAttributeAnimationWrapMode (const String &name, WrapMode wrapMode)
	Set attribute animation wrap mode.

void	SetAttributeAnimationSpeed (const String &name, float speed)
	Set attribute animation speed.

void	SetAttributeAnimationTime (const String &name, float time)
	Set attribute animation time position manually. Automatic update should be disabled in this case.

void	RemoveObjectAnimation ()
	Remove object animation. Same as calling SetObjectAnimation with a null pointer.

void	RemoveAttributeAnimation (const String &name)
	Remove attribute animation. Same as calling SetAttributeAnimation with a null pointer.

bool	GetAnimationEnabled () const
	Return animation enabled.

ObjectAnimation *	GetObjectAnimation () const
	Return object animation.

ValueAnimation *	GetAttributeAnimation (const String &name) const
	Return attribute animation.

WrapMode	GetAttributeAnimationWrapMode (const String &name) const
	Return attribute animation wrap mode.

float	GetAttributeAnimationSpeed (const String &name) const
	Return attribute animation speed.

float	GetAttributeAnimationTime (const String &name) const
	Return attribute animation time position.

void	SetObjectAnimationAttr (const ResourceRef &value)
	Set object animation attribute.

ResourceRef	GetObjectAnimationAttr () const
	Return object animation attribute.

Public Member Functions inherited from Urho3D::Serializable
	Serializable (Context *context)
	Construct.

	~Serializable () override
	Destruct.

virtual void	OnSetAttribute (const AttributeInfo &attr, const Variant &src)
	Handle attribute write access. Default implementation writes to the variable at offset, or invokes the set accessor.

virtual void	OnGetAttribute (const AttributeInfo &attr, Variant &dest) const
	Handle attribute read access. Default implementation reads the variable at offset, or invokes the get accessor.

virtual const Vector< AttributeInfo > *	GetAttributes () const
	Return attribute descriptions, or null if none defined. More...

virtual const Vector< AttributeInfo > *	GetNetworkAttributes () const
	Return network replication attribute descriptions, or null if none defined.

virtual bool	Load (Deserializer &source)
	Load from binary data. Return true if successful. More...

virtual bool	Save (Serializer &dest) const
	Save as binary data. Return true if successful. More...

virtual bool	LoadXML (const XMLElement &source)
	Load from XML data. Return true if successful. More...

virtual bool	SaveXML (XMLElement &dest) const
	Save as XML data. Return true if successful. More...

virtual bool	LoadJSON (const JSONValue &source)
	Load from JSON data. Return true if successful. More...

virtual bool	SaveJSON (JSONValue &dest) const
	Save as JSON data. Return true if successful. More...

virtual void	ApplyAttributes ()
	Apply attribute changes that can not be applied immediately. Called after scene load or a network update. More...

virtual bool	SaveDefaultAttributes () const
	Return whether should save default-valued attributes into XML. Default false. More...

virtual void	MarkNetworkUpdate ()
	Mark for attribute check on the next network update. More...

bool	SetAttribute (unsigned index, const Variant &value)
	Set attribute by index. Return true if successfully set.

bool	SetAttribute (const String &name, const Variant &value)
	Set attribute by name. Return true if successfully set.

void	SetInstanceDefault (bool enable)
	Set instance-level default flag.

void	ResetToDefault ()
	Reset all editable attributes to their default values.

void	RemoveInstanceDefault ()
	Remove instance's default values if they are set previously.

void	SetTemporary (bool enable)
	Set temporary flag. Temporary objects will not be saved.

void	SetInterceptNetworkUpdate (const String &attributeName, bool enable)
	Enable interception of an attribute from network updates. Intercepted attributes are sent as events instead of applying directly. This can be used to implement client side prediction.

void	AllocateNetworkState ()
	Allocate network attribute state.

void	WriteInitialDeltaUpdate (Serializer &dest, unsigned char timeStamp)
	Write initial delta network update.

void	WriteDeltaUpdate (Serializer &dest, const DirtyBits &attributeBits, unsigned char timeStamp)
	Write a delta network update according to dirty attribute bits.

void	WriteLatestDataUpdate (Serializer &dest, unsigned char timeStamp)
	Write a latest data network update.

bool	ReadDeltaUpdate (Deserializer &source)
	Read and apply a network delta update. Return true if attributes were changed.

bool	ReadLatestDataUpdate (Deserializer &source)
	Read and apply a network latest data update. Return true if attributes were changed.

Variant	GetAttribute (unsigned index) const
	Return attribute value by index. Return empty if illegal index.

Variant	GetAttribute (const String &name) const
	Return attribute value by name. Return empty if not found.

Variant	GetAttributeDefault (unsigned index) const
	Return attribute default value by index. Return empty if illegal index.

Variant	GetAttributeDefault (const String &name) const
	Return attribute default value by name. Return empty if not found.

unsigned	GetNumAttributes () const
	Return number of attributes.

unsigned	GetNumNetworkAttributes () const
	Return number of network replication attributes.

bool	IsTemporary () const
	Return whether is temporary.

bool	GetInterceptNetworkUpdate (const String &attributeName) const
	Return whether an attribute's network updates are being intercepted.

NetworkState *	GetNetworkState () const
	Return the network attribute state, if allocated.

Public Member Functions inherited from Urho3D::Object
	Object (Context *context)
	Construct.

	~Object () override
	Destruct. Clean up self from event sender & receiver structures.

virtual StringHash	GetType () const =0
	Return type hash. More...

virtual const String &	GetTypeName () const =0
	Return type name. More...

virtual const TypeInfo *	GetTypeInfo () const =0
	Return type info.

virtual void	OnEvent (Object *sender, StringHash eventType, VariantMap &eventData)
	Handle event.

bool	IsInstanceOf (StringHash type) const
	Check current instance is type of specified type.

bool	IsInstanceOf (const TypeInfo *typeInfo) const
	Check current instance is type of specified type.

template<typename T >
bool	IsInstanceOf () const
	Check current instance is type of specified class.

template<typename T >
T *	Cast ()
	Cast the object to specified most derived class.

template<typename T >
const T *	Cast () const
	Cast the object to specified most derived class.

void	SubscribeToEvent (StringHash eventType, EventHandler *handler)
	Subscribe to an event that can be sent by any sender.

void	SubscribeToEvent (Object sender, StringHash eventType, EventHandler handler)
	Subscribe to a specific sender's event.

void	SubscribeToEvent (StringHash eventType, const std::function< void(StringHash, VariantMap &)> &function, void *userData=nullptr)
	Subscribe to an event that can be sent by any sender.

void	SubscribeToEvent (Object sender, StringHash eventType, const std::function< void(StringHash, VariantMap &)> &function, void userData=nullptr)
	Subscribe to a specific sender's event.

void	UnsubscribeFromEvent (StringHash eventType)
	Unsubscribe from an event.

void	UnsubscribeFromEvent (Object *sender, StringHash eventType)
	Unsubscribe from a specific sender's event.

void	UnsubscribeFromEvents (Object *sender)
	Unsubscribe from a specific sender's events.

void	UnsubscribeFromAllEvents ()
	Unsubscribe from all events.

void	UnsubscribeFromAllEventsExcept (const Vector< StringHash > &exceptions, bool onlyUserData)
	Unsubscribe from all events except those listed, and optionally only those with userdata (script registered events).

void	SendEvent (StringHash eventType)
	Send event to all subscribers.

void	SendEvent (StringHash eventType, VariantMap &eventData)
	Send event with parameters to all subscribers.

VariantMap &	GetEventDataMap () const
	Return a preallocated map for event data. Used for optimization to avoid constant re-allocation of event data maps.

template<typename... Args>
void	SendEvent (StringHash eventType, Args... args)
	Send event with variadic parameter pairs to all subscribers. The parameter pairs is a list of paramID and paramValue separated by comma, one pair after another.

Context *	GetContext () const
	Return execution context.

const Variant &	GetGlobalVar (StringHash key) const
	Return global variable based on key.

const VariantMap &	GetGlobalVars () const
	Return all global variables.

void	SetGlobalVar (StringHash key, const Variant &value)
	Set global variable with the respective key and value.

Object *	GetSubsystem (StringHash type) const
	Return subsystem by type.

Object *	GetEventSender () const
	Return active event sender. Null outside event handling.

EventHandler *	GetEventHandler () const
	Return active event handler. Null outside event handling.

bool	HasSubscribedToEvent (StringHash eventType) const
	Return whether has subscribed to an event without specific sender.

bool	HasSubscribedToEvent (Object *sender, StringHash eventType) const
	Return whether has subscribed to a specific sender's event.

bool	HasEventHandlers () const
	Return whether has subscribed to any event.

template<class T >
T *	GetSubsystem () const
	Template version of returning a subsystem.

const String &	GetCategory () const
	Return object category. Categories are (optionally) registered along with the object factory. Return an empty string if the object category is not registered.

void	SetBlockEvents (bool block)
	Block object from sending and receiving events.

bool	GetBlockEvents () const
	Return sending and receiving events blocking status.

Public Member Functions inherited from Urho3D::RefCounted
	RefCounted ()
	Construct. Allocate the reference count structure and set an initial self weak reference.

virtual	~RefCounted ()
	Destruct. Mark as expired and also delete the reference count structure if no outside weak references exist.

	RefCounted (const RefCounted &rhs)=delete
	Prevent copy construction.

RefCounted &	operator= (const RefCounted &rhs)=delete
	Prevent assignment.

void	AddRef ()
	Increment reference count. Can also be called outside of a SharedPtr for traditional reference counting.

void	ReleaseRef ()
	Decrement reference count and delete self if no more references. Can also be called outside of a SharedPtr for traditional reference counting.

int	Refs () const
	Return reference count.

int	WeakRefs () const
	Return weak reference count.

RefCount *	RefCountPtr ()
	Return pointer to the reference count structure.

Static Public Member Functions
static void	RegisterObject (Context *context)
	Register object factory.

Static Public Member Functions inherited from Urho3D::UIElement
static void	RegisterObject (Context *context)
	Register object factory.

Static Public Member Functions inherited from Urho3D::Animatable
static void	RegisterObject (Context *context)
	Register object factory.

Static Public Member Functions inherited from Urho3D::Object
static const TypeInfo *	GetTypeInfoStatic ()
	Return type info static.

Protected Member Functions
bool	FilterImplicitAttributes (XMLElement &dest) const override
	Filter implicit attributes in serialization process. More...

bool	FilterScrollBarImplicitAttributes (XMLElement &dest, const String &name) const
	Filter implicit attributes in serialization process for internal scroll bar.

void	UpdatePanelSize ()
	Resize panel based on scrollbar visibility.

void	UpdateViewSize ()
	Recalculate view size, validate view position and update scrollbars.

void	UpdateScrollBars ()
	Update the scrollbars' ranges and positions.

void	UpdateView (const IntVector2 &position)
	Limit and update the view with a new position.

Protected Member Functions inherited from Urho3D::UIElement
void	OnAttributeAnimationAdded () override
	Handle attribute animation added. More...

void	OnAttributeAnimationRemoved () override
	Handle attribute animation removed. More...

Animatable *	FindAttributeAnimationTarget (const String &name, String &outName) override
	Find target of an attribute animation from object hierarchy by name. More...

void	MarkDirty ()
	Mark screen position as needing an update.

bool	RemoveChildXML (XMLElement &parent, const String &name) const
	Remove child XML element by matching attribute name.

bool	RemoveChildXML (XMLElement &parent, const String &name, const String &value) const
	Remove child XML element by matching attribute name and value.

bool	FilterUIStyleAttributes (XMLElement &dest, const XMLElement &styleElem) const
	Filter UI-style attributes in serialization process.

virtual bool	FilterImplicitAttributes (XMLElement &dest) const
	Filter implicit attributes in serialization process. More...

void	UpdateAnchoring ()
	Update anchored size & position. Only called when anchoring is enabled.

Protected Member Functions inherited from Urho3D::Animatable
virtual void	OnAttributeAnimationAdded ()=0
	Handle attribute animation added. More...

virtual void	OnAttributeAnimationRemoved ()=0
	Handle attribute animation removed. More...

virtual Animatable *	FindAttributeAnimationTarget (const String &name, String &outName)
	Find target of an attribute animation from object hierarchy by name. More...

void	SetObjectAttributeAnimation (const String &name, ValueAnimation *attributeAnimation, WrapMode wrapMode, float speed)
	Set object attribute animation internal.

void	OnObjectAnimationAdded (ObjectAnimation *objectAnimation)
	Handle object animation added.

void	OnObjectAnimationRemoved (ObjectAnimation *objectAnimation)
	Handle object animation removed.

void	UpdateAttributeAnimations (float timeStep)
	Update attribute animations.

bool	IsAnimatedNetworkAttribute (const AttributeInfo &attrInfo) const
	Is animated network attribute.

AttributeAnimationInfo *	GetAttributeAnimationInfo (const String &name) const
	Return attribute animation info.

void	HandleAttributeAnimationAdded (StringHash eventType, VariantMap &eventData)
	Handle attribute animation added.

void	HandleAttributeAnimationRemoved (StringHash eventType, VariantMap &eventData)
	Handle attribute animation removed.

Protected Attributes
SharedPtr< UIElement >	contentElement_
	Content element.

SharedPtr< ScrollBar >	horizontalScrollBar_
	Horizontal scroll bar.

SharedPtr< ScrollBar >	verticalScrollBar_
	Vertical scroll bar.

SharedPtr< BorderImage >	scrollPanel_
	Scroll panel element.

IntVector2	viewPosition_
	Current view offset from the top-left corner.

IntVector2	viewSize_
	Total view size.

IntVector2	viewPositionAttr_
	View offset attribute.

Vector2	touchScrollSpeed_
	Accumulated touch scroll speed.

Vector2	touchScrollSpeedMax_
	Max touch scroll speed.

float	pageStep_
	Arrow key page step.

bool	scrollBarsAutoVisible_
	Automatically show/hide scrollbars flag.

bool	ignoreEvents_
	Ignore scrollbar events flag. Used to prevent possible endless loop when resizing.

bool	resizeContentWidth_
	Resize content widget width to match panel. Internal flag, used by the ListView class.

float	scrollDeceleration_
	Scroll deceleration.

float	scrollSnapEpsilon_
	Scroll snap epsilon.

bool	scrollTouchDown_
	Used to trigger scroll smoothing when false.

bool	barScrolling_
	Used to prevent touch scroll - scroll bar conflict.

bool	autoDisableChildren_
	Used to determine if child elements should be disabled while touch scrolling, to prevent their trigger.

bool	scrollChildrenDisable_
	Used to determine if children have been disabled.

float	touchDistanceSum_
	Distance moved with touch scrolling.

float	autoDisableThreshold_
	Threshold to trigger auto disable children.

Protected Attributes inherited from Urho3D::UIElement
String	name_
	Name.

Vector< SharedPtr< UIElement > >	children_
	Child elements.

UIElement *	parent_ {}
	Parent element.

IntRect	clipBorder_
	Child element clipping border.

Color	colors_ [MAX_UIELEMENT_CORNERS]
	Colors.

VariantMap	vars_
	User variables.

int	priority_ {}
	Priority.

bool	bringToFront_ {}
	Bring to front when focused flag.

bool	bringToBack_ {true}
	Bring to back when defocused flag.

bool	clipChildren_ {}
	Clip children flag.

bool	sortChildren_ {true}
	Sort children according to priority flag.

bool	useDerivedOpacity_ {true}
	Use derived opacity flag.

bool	enabled_ {}
	Input enabled flag.

bool	enabledPrev_ {}
	Last SetEnabled flag before any SetDeepEnabled.

bool	editable_ {true}
	Value editable flag.

bool	selected_ {}
	Selected flag.

bool	visible_ {true}
	Visible flag.

bool	hovering_ {}
	Hovering flag.

bool	internal_ {}
	Internally created flag.

FocusMode	focusMode_ {FM_NOTFOCUSABLE}
	Focus mode.

DragAndDropModeFlags	dragDropMode_ {DD_DISABLED}
	Drag and drop flags.

LayoutMode	layoutMode_ {LM_FREE}
	Layout mode.

int	layoutSpacing_ {}
	Layout spacing.

IntRect	layoutBorder_ {}
	Layout borders.

Vector2	layoutFlexScale_ {Vector2::ONE}
	Layout flex scale.

unsigned	resizeNestingLevel_ {}
	Resize nesting level to prevent multiple events and endless loop.

unsigned	layoutNestingLevel_ {}
	Layout update nesting level to prevent endless loop.

int	layoutElementMaxSize_ {}
	Layout element maximum size in layout direction.

int	indent_ {}
	Horizontal indentation.

int	indentSpacing_ {16}
	Indent spacing (number of pixels per indentation level).

IntVector2	position_ {}
	Position.

IntVector2	screenPosition_
	Screen position.

bool	positionDirty_ {true}
	Screen position dirty flag.

String	appliedStyle_
	Applied style.

MouseButtonFlags	dragButtonCombo_ {}
	Drag button combo.

i32	dragButtonCount_ {}
	Drag button count.

Protected Attributes inherited from Urho3D::Animatable
bool	animationEnabled_
	Animation enabled.

SharedPtr< ObjectAnimation >	objectAnimation_
	Animation.

HashSet< const AttributeInfo * >	animatedNetworkAttributes_
	Animated network attribute set.

HashMap< String, SharedPtr< AttributeAnimationInfo > >	attributeAnimationInfos_
	Attribute animation infos.

Protected Attributes inherited from Urho3D::Serializable
std::unique_ptr< NetworkState >	networkState_
	Network attribute state.

Protected Attributes inherited from Urho3D::Object
Context *	context_
	Execution context.

Private Member Functions
	URHO3D_OBJECT (ScrollView, UIElement)

void	HandleScrollBarChanged (StringHash eventType, VariantMap &eventData)
	Handle scrollbar value changed.

void	HandleScrollBarVisibleChanged (StringHash eventType, VariantMap &eventData)
	Handle scrollbar visibility changed.

void	HandleElementResized (StringHash eventType, VariantMap &eventData)
	Handle content element resized.

void	HandleTouchMove (StringHash eventType, VariantMap &eventData)
	Handle touch move event for scrolling.

void	ScrollSmooth (float timeStep)
	Handle the scroll smoothing.

Detailed Description

Scrollable UI element for showing a (possibly large) child element.

Member Function Documentation

◆ ApplyAttributes()

void Urho3D::ScrollView::ApplyAttributes ( )

overridevirtual

Apply attribute changes that can not be applied immediately.

Reimplemented from Urho3D::Serializable.

◆ FilterImplicitAttributes()

bool Urho3D::ScrollView::FilterImplicitAttributes ( XMLElement & dest ) const

overrideprotectedvirtual

Filter implicit attributes in serialization process.

Reimplemented from Urho3D::UIElement.

◆ IsWheelHandler()

bool Urho3D::ScrollView::IsWheelHandler ( ) const

inlineoverridevirtual

Return whether the element could handle wheel input.

Reimplemented from Urho3D::UIElement.

◆ OnKey()

void Urho3D::ScrollView::OnKey	(	Key	key,
		MouseButtonFlags	buttons,
		QualifierFlags	qualifiers
	)

overridevirtual

React to a key press.

Reimplemented from Urho3D::UIElement.

◆ OnResize()

void Urho3D::ScrollView::OnResize	(	const IntVector2 &	newSize,
		const IntVector2 &	delta
	)

overridevirtual

React to resize.

Reimplemented from Urho3D::UIElement.

◆ OnWheel()

void Urho3D::ScrollView::OnWheel	(	int	delta,
		MouseButtonFlags	buttons,
		QualifierFlags	qualifiers
	)

overridevirtual

React to mouse wheel.

Reimplemented from Urho3D::UIElement.

◆ Update()

void Urho3D::ScrollView::Update ( float timeStep )

overridevirtual

Perform UI element update.

Reimplemented from Urho3D::UIElement.

The documentation for this class was generated from the following files:

/home/runner/work/urho3d-doxygen.github.io/urho3d-doxygen.github.io/urho3d_repo/Source/Urho3D/UI/ScrollView.h
/home/runner/work/urho3d-doxygen.github.io/urho3d-doxygen.github.io/urho3d_repo/Source/Urho3D/UI/ScrollView.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Detailed Description

Member Function Documentation

◆ ApplyAttributes()

◆ FilterImplicitAttributes()

◆ IsWheelHandler()

◆ OnKey()

◆ OnResize()

◆ OnWheel()

◆ Update()