Urho3D::UIElement Class Reference

Base class for UI elements. More...

#include <Urho3D/UI/UIElement.h>

Inheritance diagram for Urho3D::UIElement:

Collaboration diagram for Urho3D::UIElement:

Public Member Functions
	UIElement (Context *context)
	Construct.
	~UIElement () override
	Destruct.
void	ApplyAttributes () override
	Apply attribute changes that can not be applied immediately.
bool	LoadXML (const XMLElement &source) override
	Load from XML data. Return true if successful.
virtual bool	LoadXML (const XMLElement &source, XMLFile *styleFile)
	Load from XML data with style. Return true if successful.
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.
virtual void	Update (float timeStep)
	Perform UI element update.
virtual bool	IsWithinScissor (const IntRect &currentScissor)
	Return whether is visible and inside a scissor rectangle and should be rendered.
virtual const IntVector2 &	GetScreenPosition () const
virtual void	GetBatches (PODVector< UIBatch > &batches, PODVector< float > &vertexData, const IntRect &currentScissor)
	Return UI rendering batches.
virtual void	GetDebugDrawBatches (PODVector< UIBatch > &batches, PODVector< 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.
virtual void	OnClickBegin (const IntVector2 &position, const IntVector2 &screenPosition, MouseButton button, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse click begin.
virtual void	OnClickEnd (const IntVector2 &position, const IntVector2 &screenPosition, MouseButton button, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor, UIElement *beginElement)
	React to mouse click end.
virtual void	OnDoubleClick (const IntVector2 &position, const IntVector2 &screenPosition, MouseButton button, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to double mouse click.
virtual void	OnDragBegin (const IntVector2 &position, const IntVector2 &screenPosition, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse drag begin.
virtual void	OnDragMove (const IntVector2 &position, const IntVector2 &screenPosition, const IntVector2 &deltaPos, MouseButtonFlags buttons, QualifierFlags qualifiers, Cursor *cursor)
	React to mouse drag motion.
virtual void	OnDragEnd (const IntVector2 &position, const IntVector2 &screenPosition, MouseButtonFlags dragButtons, MouseButtonFlags releaseButtons, Cursor *cursor)
	React to mouse drag end.
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).
virtual bool	OnDragDropTest (UIElement *source)
	React to drag and drop test. Return true to signal that the drop is acceptable.
virtual bool	OnDragDropFinish (UIElement *source)
	React to drag and drop finish. Return true to signal that the drop was accepted.
virtual void	OnWheel (int delta, MouseButtonFlags buttons, QualifierFlags qualifiers)
	React to mouse wheel.
virtual void	OnKey (Key key, MouseButtonFlags buttons, QualifierFlags qualifiers)
	React to a key press.
virtual void	OnTextInput (const String &text)
	React to text input event.
virtual void	OnResize (const IntVector2 &newSize, const IntVector2 &delta)
	React to resize.
virtual void	OnPositionSet (const IntVector2 &newPosition)
	React to position change.
virtual void	OnSetEditable ()
	React to editable status change.
virtual void	OnIndentSet ()
	React to indent change.
virtual IntVector2	ScreenToElement (const IntVector2 &screenPosition)
	Convert screen coordinates to element coordinates.
virtual IntVector2	ElementToScreen (const IntVector2 &position)
	Convert element coordinates to screen coordinates.
virtual bool	IsWheelHandler () const
	Return whether the element could handle wheel input.
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)
void	SetPosition (const IntVector2 &position)
void	SetPosition (int x, int y)
	Set position.
void	SetSize (const IntVector2 &size)
void	SetSize (int width, int height)
	Set size.
void	SetWidth (int width)
void	SetHeight (int height)
void	SetMinSize (const IntVector2 &minSize)
void	SetMinSize (int width, int height)
	Set minimum size.
void	SetMinWidth (int width)
void	SetMinHeight (int height)
void	SetMaxSize (const IntVector2 &maxSize)
void	SetMaxSize (int width, int height)
	Set maximum size.
void	SetMaxWidth (int width)
void	SetMaxHeight (int 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)
void	SetVerticalAlignment (VerticalAlignment align)
void	SetEnableAnchor (bool enable)
void	SetMinAnchor (const Vector2 &anchor)
void	SetMinAnchor (float x, float y)
	Set minimum anchor.
void	SetMaxAnchor (const Vector2 &anchor)
void	SetMaxAnchor (float x, float y)
	Set maximum anchor.
void	SetMinOffset (const IntVector2 &offset)
void	SetMaxOffset (const IntVector2 &offset)
void	SetPivot (const Vector2 &pivot)
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)
void	SetColor (const Color &color)
void	SetColor (Corner corner, const Color &color)
void	SetPriority (int priority)
void	SetOpacity (float opacity)
void	SetBringToFront (bool enable)
void	SetBringToBack (bool enable)
void	SetClipChildren (bool enable)
void	SetSortChildren (bool enable)
void	SetUseDerivedOpacity (bool enable)
void	SetEnabled (bool enable)
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)
void	SetFocus (bool enable)
void	SetSelected (bool enable)
void	SetVisible (bool enable)
void	SetFocusMode (FocusMode mode)
void	SetDragDropMode (DragAndDropModeFlags mode)
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)
void	SetLayout (LayoutMode mode, int spacing=0, const IntRect &border=IntRect::ZERO)
	Set layout parameters.
void	SetLayoutMode (LayoutMode mode)
void	SetLayoutSpacing (int spacing)
void	SetLayoutBorder (const IntRect &border)
void	SetLayoutFlexScale (const Vector2 &scale)
void	SetIndent (int indent)
void	SetIndentSpacing (int indentSpacing)
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, unsigned index=M_MAX_UNSIGNED)
	Create and add a child element and return it.
void	AddChild (UIElement *element)
	Add a child element.
void	InsertChild (unsigned index, UIElement *element)
	Insert a child element into a specific position in the child list.
void	RemoveChild (UIElement *element, unsigned index=0)
	Remove a child element. Starting search at specified index if provided.
void	RemoveChildAtIndex (unsigned 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.
unsigned	FindChild (UIElement *element) const
	Find child index. Return M_MAX_UNSIGNED if not found.
void	SetParent (UIElement *parent, unsigned index=M_MAX_UNSIGNED)
	Set parent element. Same as parent->InsertChild(index, this).
void	SetVar (StringHash key, const Variant &value)
	Set a user variable.
void	SetInternal (bool enable)
void	SetTraversalMode (TraversalMode traversalMode)
void	SetElementEventSender (bool flag)
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, unsigned index=M_MAX_UNSIGNED)
	Template version of creating a child element.
template<class T >
T *	GetChildStaticCast (unsigned 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 (unsigned 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
const IntVector2 &	GetPosition () const
const IntVector2 &	GetSize () const
int	GetWidth () const
int	GetHeight () const
const IntVector2 &	GetMinSize () const
int	GetMinWidth () const
int	GetMinHeight () const
const IntVector2 &	GetMaxSize () const
int	GetMaxWidth () const
int	GetMaxHeight () const
bool	IsFixedSize () const
bool	IsFixedWidth () const
bool	IsFixedHeight () const
const IntVector2 &	GetChildOffset () const
HorizontalAlignment	GetHorizontalAlignment () const
VerticalAlignment	GetVerticalAlignment () const
bool	GetEnableAnchor () const
const Vector2 &	GetMinAnchor () const
const Vector2 &	GetMaxAnchor () const
const IntVector2 &	GetMinOffset () const
const IntVector2 &	GetMaxOffset () const
const Vector2 &	GetPivot () const
const IntRect &	GetClipBorder () const
const Color &	GetColor (Corner corner) const
int	GetPriority () const
float	GetOpacity () const
float	GetDerivedOpacity () const
bool	GetBringToFront () const
bool	GetBringToBack () const
bool	GetClipChildren () const
bool	GetSortChildren () const
bool	GetUseDerivedOpacity () const
bool	HasFocus () const
bool	IsChildOf (UIElement *element) const
	Return whether is a direct or indirect child of specified element.
bool	IsEnabled () const
bool	IsEnabledSelf () const
bool	IsEditable () const
bool	IsSelected () const
bool	IsVisible () const
bool	IsVisibleEffective () const
bool	IsHovering () const
bool	IsInternal () const
bool	HasColorGradient () const
FocusMode	GetFocusMode () const
DragAndDropModeFlags	GetDragDropMode () const
const String &	GetAppliedStyle () const
XMLFile *	GetDefaultStyle (bool recursiveUp=true) const
	Return default style.
LayoutMode	GetLayoutMode () const
int	GetLayoutSpacing () const
const IntRect &	GetLayoutBorder () const
const Vector2 &	GetLayoutFlexScale () const
unsigned	GetNumChildren (bool recursive=false) const
UIElement *	GetChild (unsigned index) const
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 (PODVector< UIElement * > &dest, bool recursive=false) const
	Return child elements either recursively or non-recursively.
PODVector< UIElement * >	GetChildren (bool recursive) const
	Return child elements, optionally recursive.
UIElement *	GetParent () const
UIElement *	GetRoot () const
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
void	GetChildrenWithTag (PODVector< UIElement * > &dest, const String &tag, bool recursive=false) const
	Return child elements with a specific tag either recursively or non-recursively.
PODVector< UIElement * >	GetChildrenWithTag (const String &tag, bool recursive=false) const
	Return child elements with a specific tag either recursively or non-recursively.
MouseButtonFlags	GetDragButtonCombo () const
unsigned	GetDragButtonCount () const
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 ()
void	SortChildren ()
	Sort child elements if sorting enabled and order dirty. Called by UI. More...
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
int	GetIndentSpacing () const
int	GetIndentWidth () const
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, PODVector< UIBatch > &batches, PODVector< 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
bool	IsElementEventSender () const
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	LoadJSON (const JSONValue &source) override
	Load from JSON data. Return true if successful.
bool	SaveJSON (JSONValue &dest) const override
	Save as JSON data. Return true if successful.
void	SetAnimationEnabled (bool enable)
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)
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
ObjectAnimation *	GetObjectAnimation () const
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.
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.
virtual bool	Save (Serializer &dest) const
	Save as binary data. Return true if successful.
virtual bool	SaveDefaultAttributes () const
	Return whether should save default-valued attributes into XML. Default false.
virtual void	MarkNetworkUpdate ()
	Mark for attribute check on the next network update.
bool	SetAttribute (unsigned index, const Variant &value)
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)
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
Variant	GetAttribute (const String &name) const
	Return attribute value by name. Return empty if not found.
Variant	GetAttributeDefault (unsigned index) const
Variant	GetAttributeDefault (const String &name) const
	Return attribute default value by name. Return empty if not found.
unsigned	GetNumAttributes () const
unsigned	GetNumNetworkAttributes () const
	Return number of network replication attributes.
bool	IsTemporary () const
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
virtual const String &	GetTypeName () const =0
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 PODVector< 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
const VariantMap &	GetGlobalVars () const
void	SetGlobalVar (StringHash key, const Variant &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
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
int	WeakRefs () const
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::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
void	OnAttributeAnimationAdded () override
	Handle attribute animation added.
void	OnAttributeAnimationRemoved () override
	Handle attribute animation removed.
Animatable *	FindAttributeAnimationTarget (const String &name, String &outName) override
	Find target of an attribute animation from object hierarchy by name.
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.
void	UpdateAnchoring ()
	Update anchored size & position. Only called when anchoring is enabled.
Protected Member Functions inherited from Urho3D::Animatable
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
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.
unsigned	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
UniquePtr< NetworkState >	networkState_
	Network attribute state.
Protected Attributes inherited from Urho3D::Object
Context *	context_
	Execution context.

Private Member Functions
	URHO3D_OBJECT (UIElement, Animatable)
void	GetChildrenRecursive (PODVector< UIElement * > &dest) const
	Return child elements recursively.
void	GetChildrenWithTagRecursive (PODVector< UIElement * > &dest, const String &tag) const
	Return child elements with a specific tag recursively.
void	ApplyStyleRecursive (UIElement *element)
	Recursively apply style to a child element hierarchy when adding to an element.
int	CalculateLayoutParentSize (const PODVector< int > &sizes, int begin, int end, int spacing)
	Calculate layout width for resizing the parent element.
void	CalculateLayout (PODVector< int > &positions, PODVector< int > &sizes, const PODVector< int > &minSizes, const PODVector< int > &maxSizes, const PODVector< float > &flexScales, int targetSize, int begin, int end, int spacing)
	Calculate child widths/positions in the layout.
IntVector2	GetLayoutChildPosition (UIElement *child)
	Get child element constant position in a layout.
void	Detach ()
	Detach from parent.
void	VerifyChildAlignment ()
	Verify that child elements have proper alignment for layout mode.
void	HandlePostUpdate (StringHash eventType, VariantMap &eventData)
	Handle logic post-update event.

Private Attributes
IntVector2	size_
	Size.
IntVector2	minSize_
	Minimum size.
IntVector2	maxSize_ {M_MAX_INT, M_MAX_INT}
	Maximum size.
IntVector2	childOffset_
	Child elements' offset. Used internally.
IntVector2	layoutMinSize_
	Parent's minimum size calculated by layout. Used internally.
IntVector2	minOffset_
	Minimum offset.
IntVector2	maxOffset_
	Maximum offset.
bool	enableAnchor_ {}
	Use min/max anchor & min/max offset for position & size instead of setting explicitly.
bool	pivotSet_ {}
	Has pivot changed manually.
Vector2	anchorMin_
	Anchor minimum position.
Vector2	anchorMax_
	Anchor maximum position.
Vector2	pivot_
	Pivot Position.
float	opacity_ {1.0f}
	Opacity.
float	derivedOpacity_ {}
	Derived opacity.
Color	derivedColor_
	Derived color. Only valid when no gradient.
bool	opacityDirty_ {true}
	Derived opacity dirty flag.
bool	derivedColorDirty_ {true}
	Derived color dirty flag (only used when no gradient).
bool	sortOrderDirty_ {}
	Child priority sorting dirty flag.
bool	colorGradient_ {}
	Has color gradient flag.
SharedPtr< XMLFile >	defaultStyle_
	Default style file.
WeakPtr< XMLFile >	appliedStyleFile_
	Last applied style file.
TraversalMode	traversalMode_ {TM_BREADTH_FIRST}
	Traversal mode for rendering.
bool	elementEventSender_ {}
	Flag whether node should send child added / removed events by itself.
StringVector	tags_
	Tag list.

Static Private Attributes
static XPathQuery	styleXPathQuery_
	XPath query for selecting UI-style.

Detailed Description

Base class for UI elements.

Member Function Documentation

GetAppliedStyle()

const String & Urho3D::UIElement::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).

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GetBringToBack()

bool Urho3D::UIElement::GetBringToBack ( ) const

inline

Return whether should be put to background when another element is focused.

GetBringToFront()

bool Urho3D::UIElement::GetBringToFront ( ) const

inline

Return whether should be brought to front when focused.

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GetChild()

UIElement * Urho3D::UIElement::GetChild

(

unsigned

index

)

const

Return child element by index.

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GetChildOffset()

const IntVector2& Urho3D::UIElement::GetChildOffset ( ) const

inline

Return child element offset.

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GetClipBorder()

const IntRect& Urho3D::UIElement::GetClipBorder ( ) const

inline

Return child element clipping border.

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GetClipChildren()

bool Urho3D::UIElement::GetClipChildren ( ) const

inline

Return whether should clip child elements.

GetColor()

const Color& Urho3D::UIElement::GetColor ( Corner  corner ) const

inline

Return corner color.

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GetCombinedScreenRect()

IntRect Urho3D::UIElement::GetCombinedScreenRect

(

)

Return combined screen coordinate rect of element and its children.

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GetDerivedOpacity()

float Urho3D::UIElement::GetDerivedOpacity

(

)

const

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

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GetDragButtonCombo()

MouseButtonFlags Urho3D::UIElement::GetDragButtonCombo ( ) const

inline

Return the drag button combo if this element is being dragged.

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GetDragButtonCount()

unsigned Urho3D::UIElement::GetDragButtonCount ( ) const

inline

Return the number of buttons dragging this element.

GetDragDropMode()

DragAndDropModeFlags Urho3D::UIElement::GetDragDropMode ( ) const

inline

Return drag and drop flags.

GetEnableAnchor()

bool Urho3D::UIElement::GetEnableAnchor ( ) const

inline

Return whether anchor positioning & sizing is enabled.

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GetFocusMode()

FocusMode Urho3D::UIElement::GetFocusMode ( ) const

inline

Return focus mode.

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GetHeight()

int Urho3D::UIElement::GetHeight ( ) const

inline

Return height.

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GetHorizontalAlignment()

HorizontalAlignment Urho3D::UIElement::GetHorizontalAlignment

(

)

const

Return horizontal alignment. If pivot has been adjusted to a custom horizontal setting, returns HA_CUSTOM.

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GetIndent()

int Urho3D::UIElement::GetIndent ( ) const

inline

Return horizontal indentation.

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GetIndentSpacing()

int Urho3D::UIElement::GetIndentSpacing ( ) const

inline

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

GetIndentWidth()

int Urho3D::UIElement::GetIndentWidth ( ) const

inline

Return indent width in pixels.

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GetLayoutBorder()

const IntRect& Urho3D::UIElement::GetLayoutBorder ( ) const

inline

Return layout border.

GetLayoutFlexScale()

const Vector2& Urho3D::UIElement::GetLayoutFlexScale ( ) const

inline

Return layout flex scale.

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GetLayoutMode()

LayoutMode Urho3D::UIElement::GetLayoutMode ( ) const

inline

Return layout mode.

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GetLayoutSpacing()

int Urho3D::UIElement::GetLayoutSpacing ( ) const

inline

Return layout spacing.

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GetMaxAnchor()

const Vector2& Urho3D::UIElement::GetMaxAnchor ( ) const

inline

Return maximum anchor.

GetMaxHeight()

int Urho3D::UIElement::GetMaxHeight ( ) const

inline

Return minimum height.

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GetMaxSize()

const IntVector2& Urho3D::UIElement::GetMaxSize ( ) const

inline

Return maximum size.

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GetMaxWidth()

int Urho3D::UIElement::GetMaxWidth ( ) const

inline

Return minimum width.

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GetMinAnchor()

const Vector2& Urho3D::UIElement::GetMinAnchor ( ) const

inline

Return minimum anchor.

GetMinHeight()

int Urho3D::UIElement::GetMinHeight ( ) const

inline

Return minimum height.

GetMinSize()

const IntVector2& Urho3D::UIElement::GetMinSize ( ) const

inline

Return minimum size.

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GetMinWidth()

int Urho3D::UIElement::GetMinWidth ( ) const

inline

Return minimum width.

GetName()

const String& Urho3D::UIElement::GetName ( ) const

inline

Return name.

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GetNumChildren()

unsigned Urho3D::UIElement::GetNumChildren

(

bool

recursive = false

)

const

Return number of child elements.

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GetOpacity()

float Urho3D::UIElement::GetOpacity ( ) const

inline

Return opacity.

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GetParent()

UIElement* Urho3D::UIElement::GetParent ( ) const

inline

Return parent element.

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GetPivot()

const Vector2& Urho3D::UIElement::GetPivot ( ) const

inline

Return pivot.

GetPosition()

const IntVector2& Urho3D::UIElement::GetPosition ( ) const

inline

Return position.

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GetPriority()

int Urho3D::UIElement::GetPriority ( ) const

inline

Return priority.

GetRoot()

UIElement * Urho3D::UIElement::GetRoot

(

)

const

Return root element.

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GetScreenPosition()

const IntVector2 & Urho3D::UIElement::GetScreenPosition ( ) const

virtual

Update and return screen position.

Reimplemented in Urho3D::Sprite.

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GetSize()

const IntVector2& Urho3D::UIElement::GetSize ( ) const

inline

Return size.

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GetSortChildren()

bool Urho3D::UIElement::GetSortChildren ( ) const

inline

Return whether should sort child elements according to priority.

GetTags()

const StringVector& Urho3D::UIElement::GetTags ( ) const

inline

Return all tags.

GetTraversalMode()

TraversalMode Urho3D::UIElement::GetTraversalMode ( ) const

inline

Return traversal mode for rendering.

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GetUseDerivedOpacity()

bool Urho3D::UIElement::GetUseDerivedOpacity ( ) const

inline

Return whether parent elements' opacity affects opacity.

GetVerticalAlignment()

VerticalAlignment Urho3D::UIElement::GetVerticalAlignment

(

)

const

Return vertical alignment. If pivot has been adjusted to a custom vertical setting, returns VA_CUSTOM.

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GetWidth()

int Urho3D::UIElement::GetWidth ( ) const

inline

Return width.

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HasColorGradient()

bool Urho3D::UIElement::HasColorGradient ( ) const

inline

Return whether has different color in at least one corner.

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HasFocus()

bool Urho3D::UIElement::HasFocus

(

)

const

Return whether has focus.

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IsEditable()

bool Urho3D::UIElement::IsEditable ( ) const

inline

Return whether value is editable through input.

IsElementEventSender()

bool Urho3D::UIElement::IsElementEventSender ( ) const

inline

Return whether element should send child added / removed events by itself. If false, defers to parent element.

IsEnabled()

bool Urho3D::UIElement::IsEnabled ( ) const

inline

Return whether reacts to input.

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IsEnabledSelf()

bool Urho3D::UIElement::IsEnabledSelf ( ) const

inline

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

IsFixedHeight()

bool Urho3D::UIElement::IsFixedHeight ( ) const

inline

Return true if height is fixed.

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IsFixedSize()

bool Urho3D::UIElement::IsFixedSize ( ) const

inline

Return true if size is fixed.

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IsFixedWidth()

bool Urho3D::UIElement::IsFixedWidth ( ) const

inline

Return true if width is fixed.

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IsHovering()

bool Urho3D::UIElement::IsHovering ( ) const

inline

Return whether the cursor is hovering on this element.

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IsInternal()

bool Urho3D::UIElement::IsInternal ( ) const

inline

Return whether is internally created.

IsSelected()

bool Urho3D::UIElement::IsSelected ( ) const

inline

Return whether is selected. Actual meaning is element dependent.

IsVisible()

bool Urho3D::UIElement::IsVisible ( ) const

inline

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

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IsVisibleEffective()

bool Urho3D::UIElement::IsVisibleEffective

(

)

const

Return whether element is effectively visible (parent element chain is visible).

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SetBringToBack()

void Urho3D::UIElement::SetBringToBack

(

bool

enable

)

Set whether should be put to background when another element is focused.

SetBringToFront()

void Urho3D::UIElement::SetBringToFront

(

bool

enable

)

Set whether should be brought to front when focused.

SetClipBorder()

void Urho3D::UIElement::SetClipBorder

(

const IntRect &

rect

)

Set child element clipping border.

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SetClipChildren()

void Urho3D::UIElement::SetClipChildren

(

bool

enable

)

Set whether should clip child elements. Default false.

SetColor() [1/2]

void Urho3D::UIElement::SetColor

(

const Color &

color

)

Set color on all corners.

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SetColor() [2/2]

void Urho3D::UIElement::SetColor	(	Corner	corner,
		const Color &	color
	)

Set color on one corner.

SetDefaultStyle()

void Urho3D::UIElement::SetDefaultStyle

(

XMLFile *

style

)

Set default style file for later use by children elements.

SetDragDropMode()

void Urho3D::UIElement::SetDragDropMode

(

DragAndDropModeFlags

mode

)

Set drag and drop flags.

SetEditable()

void Urho3D::UIElement::SetEditable

(

bool

enable

)

Set whether value is editable through input. Not applicable to all elements. Default true.

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SetElementEventSender()

void Urho3D::UIElement::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.

SetEnableAnchor()

void Urho3D::UIElement::SetEnableAnchor

(

bool

enable

)

Enable automatic positioning & sizing of the element relative to its parent using min/max anchor and min/max offset. Default false.

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SetEnabled()

void Urho3D::UIElement::SetEnabled

(

bool

enable

)

Set whether reacts to input. Default false, but is enabled by subclasses if applicable.

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SetFocus()

void Urho3D::UIElement::SetFocus

(

bool

enable

)

Set whether is focused. Only one element can be focused at a time.

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SetFocusMode()

void Urho3D::UIElement::SetFocusMode

(

FocusMode

mode

)

Set focus mode.

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SetHeight()

void Urho3D::UIElement::SetHeight

(

int

height

)

Set height only.

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SetHorizontalAlignment()

void Urho3D::UIElement::SetHorizontalAlignment

(

HorizontalAlignment

align

)

Set horizontal alignment.

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SetIndent()

void Urho3D::UIElement::SetIndent

(

int

indent

)

Set horizontal indentation.

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SetIndentSpacing()

void Urho3D::UIElement::SetIndentSpacing

(

int

indentSpacing

)

Set indent spacing (number of pixels per indentation level).

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SetInternal()

void Urho3D::UIElement::SetInternal

(

bool

enable

)

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

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SetLayoutBorder()

void Urho3D::UIElement::SetLayoutBorder

(

const IntRect &

border

)

Set layout border.

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SetLayoutFlexScale()

void Urho3D::UIElement::SetLayoutFlexScale

(

const Vector2 &

scale

)

Set layout flex scale.

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SetLayoutMode()

void Urho3D::UIElement::SetLayoutMode

(

LayoutMode

mode

)

Set layout mode only.

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SetLayoutSpacing()

void Urho3D::UIElement::SetLayoutSpacing

(

int

spacing

)

Set layout spacing.

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SetMaxAnchor()

void Urho3D::UIElement::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.

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SetMaxHeight()

void Urho3D::UIElement::SetMaxHeight

(

int

height

)

Set maximum height.

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SetMaxOffset()

void Urho3D::UIElement::SetMaxOffset

(

const IntVector2 &

offset

)

Set offset of element's bottom right from the maximum anchor in pixels. No effect when anchor is not enabled.

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SetMaxSize()

void Urho3D::UIElement::SetMaxSize

(

const IntVector2 &

maxSize

)

Set maximum size.

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SetMaxWidth()

void Urho3D::UIElement::SetMaxWidth

(

int

width

)

Set maximum width.

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SetMinAnchor()

void Urho3D::UIElement::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.

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SetMinHeight()

void Urho3D::UIElement::SetMinHeight

(

int

height

)

Set minimum height.

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SetMinOffset()

void Urho3D::UIElement::SetMinOffset

(

const IntVector2 &

offset

)

Set offset of element's top left from the minimum anchor in pixels. No effect when anchor is not enabled.

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SetMinSize()

void Urho3D::UIElement::SetMinSize

(

const IntVector2 &

minSize

)

Set minimum size.

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SetMinWidth()

void Urho3D::UIElement::SetMinWidth

(

int

width

)

Set minimum width.

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SetName()

void Urho3D::UIElement::SetName

(

const String &

name

)

Set name.

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SetOpacity()

void Urho3D::UIElement::SetOpacity

(

float

opacity

)

Set opacity.

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SetPivot()

void Urho3D::UIElement::SetPivot

(

const Vector2 &

pivot

)

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

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SetPosition()

void Urho3D::UIElement::SetPosition

(

const IntVector2 &

position

)

Set position.

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SetPriority()

void Urho3D::UIElement::SetPriority

(

int

priority

)

Set priority.

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SetSelected()

void Urho3D::UIElement::SetSelected

(

bool

enable

)

Set selected mode. Actual meaning is element dependent, for example constant hover or pressed effect.

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SetSize()

void Urho3D::UIElement::SetSize

(

const IntVector2 &

size

)

Set size.

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SetSortChildren()

void Urho3D::UIElement::SetSortChildren

(

bool

enable

)

Set whether should sort child elements according to priority. Default true.

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SetTraversalMode()

void Urho3D::UIElement::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.

SetUseDerivedOpacity()

void Urho3D::UIElement::SetUseDerivedOpacity

(

bool

enable

)

Set whether parent elements' opacity affects opacity. Default true.

SetVerticalAlignment()

void Urho3D::UIElement::SetVerticalAlignment

(

VerticalAlignment

align

)

Set vertical alignment.

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SetVisible()

void Urho3D::UIElement::SetVisible

(

bool

enable

)

Set whether is visible. Visibility propagates to child elements.

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SetWidth()

void Urho3D::UIElement::SetWidth

(

int

width

)

Set width only.

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SortChildren()

void Urho3D::UIElement::SortChildren

(

)

Sort child elements if sorting enabled and order dirty. Called by UI.

Todo:

Order is not stable when children have same priorities

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---

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

• Source/Urho3D/UI/UIElement.h
• Source/Urho3D/UI/UIElement.cpp