Urho3D::UIElement Class Reference

Base class for UI elements. More...

#include <UIElement.h>

Inheritance diagram for Urho3D::UIElement:

Collaboration diagram for Urho3D::UIElement:

Public Member Functions
	UIElement (Context *context)
	Construct.
virtual	~UIElement ()
	Destruct.
virtual void	ApplyAttributes ()
	Apply attribute changes that can not be applied immediately.
virtual bool	LoadXML (const XMLElement &source, bool setInstanceDefault=false)
	Load from XML data. Return true if successful.
virtual bool	LoadXML (const XMLElement &source, XMLFile *styleFile, bool setInstanceDefault=false)
	Load from XML data with style. Return true if successful.
virtual bool	LoadChildXML (const XMLElement &childElem, XMLFile *styleFile=0, bool setInstanceDefault=false)
	Create a child by loading from XML data with style. Return true if successful.
virtual bool	SaveXML (XMLElement &dest) const
	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
	Update and return screen position.
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, int buttons, int qualifiers, Cursor *cursor)
	React to mouse hover.
virtual void	OnClickBegin (const IntVector2 &position, const IntVector2 &screenPosition, int button, int buttons, int qualifiers, Cursor *cursor)
	React to mouse click begin.
virtual void	OnClickEnd (const IntVector2 &position, const IntVector2 &screenPosition, int button, int buttons, int qualifiers, Cursor *cursor, UIElement *beginElement)
	React to mouse click end.
virtual void	OnDoubleClick (const IntVector2 &position, const IntVector2 &screenPosition, int button, int buttons, int qualifiers, Cursor *cursor)
	React to double mouse click.
virtual void	OnDragBegin (const IntVector2 &position, const IntVector2 &screenPosition, int buttons, int qualifiers, Cursor *cursor)
	React to mouse drag begin.
virtual void	OnDragMove (const IntVector2 &position, const IntVector2 &screenPosition, const IntVector2 &deltaPos, int buttons, int qualifiers, Cursor *cursor)
	React to mouse drag motion.
virtual void	OnDragEnd (const IntVector2 &position, const IntVector2 &screenPosition, int dragButtons, int releaseButton, Cursor *cursor)
	React to mouse drag end.
virtual void	OnDragCancel (const IntVector2 &position, const IntVector2 &screenPosition, int dragButtons, int cancelButton, 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, int buttons, int qualifiers)
	React to mouse wheel.
virtual void	OnKey (int key, int buttons, int qualifiers)
	React to a key press.
virtual void	OnTextInput (const String &text, int buttons, int qualifiers)
	React to text input event.
virtual void	OnResize ()
	React to resize.
virtual void	OnPositionSet ()
	React to position change.
virtual void	OnSetEditable ()
	React to editable status change.
virtual void	OnIndentSet ()
	React to indent change.
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	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 (unsigned mode)
	Set drag and drop flags.
bool	SetStyle (const String &styleName, XMLFile *file=0)
	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.
bool	SetStyle (const XMLElement &element)
	Set style from an XML element. Return true if the style is applied successfully.
bool	SetStyleAuto (XMLFile *file=0)
	Set style from an XML file. Find the style element automatically. If the style file is not explicitly provided, use the default style from parental chain. Return true if the style is applied successfully.
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.
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, 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)
	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.
template<class T >
T *	CreateChild (const String &name=String::EMPTY, unsigned index=M_MAX_UNSIGNED)
	Template version of creating a child element.
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.
VerticalAlignment	GetVerticalAlignment () const
	Return vertical alignment.
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	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.
unsigned	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.
unsigned	GetNumChildren (bool recursive=false) const
	Return number of child elements.
UIElement *	GetChild (unsigned 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 (PODVector< UIElement * > &dest, bool recursive=false) const
	Return child elements either recursively or non-recursively.
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.
int	GetDragButtonCombo () const
	Return the drag button combo if this element is being dragged.
unsigned	GetDragButtonCount () const
	Return the number of buttons dragging this element.
IntVector2	ScreenToElement (const IntVector2 &screenPosition)
	Convert screen coordinates to element coordinates.
IntVector2	ElementToScreen (const IntVector2 &position)
	Convert element coordinates to screen coordinates.
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, 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
	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.
Public Member Functions inherited from Urho3D::Animatable
	Animatable (Context *context)
	Construct.
virtual	~Animatable ()
	Destruct.
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.
virtual	~Serializable ()
	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, bool setInstanceDefault=false)
	Load from binary data. When setInstanceDefault is set to true, after setting the attribute value, store the value as instance's default value. 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)
	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	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.
virtual	~Object ()
	Destruct. Clean up self from event sender & receiver structures.
virtual StringHash	GetType () const =0
	Return type hash.
virtual const String &	GetTypeName () const =0
	Return type name.
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.
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	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. More...
VariantMap &	GetEventDataMap () const
	Return a preallocated map for event data. Used for optimization to avoid constant re-allocation of event data maps.
Context *	GetContext () const
	Return execution context.
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.
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.
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::Animatable
static void	RegisterObject (Context *context)
	Register object factory.

Protected Member Functions
virtual void	OnAttributeAnimationAdded ()
	Handle attribute animation added.
virtual void	OnAttributeAnimationRemoved ()
	Handle attribute animation removed.
virtual Animatable *	FindAttributeAnimationTarget (const String &name, String &outName)
	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.
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	color_ [MAX_UIELEMENT_CORNERS]
	Colors.
VariantMap	vars_
	User variables.
int	priority_
	Priority.
bool	bringToFront_
	Bring to front when focused flag.
bool	bringToBack_
	Bring to back when defocused flag.
bool	clipChildren_
	Clip children flag.
bool	sortChildren_
	Sort children according to priority flag.
bool	useDerivedOpacity_
	Use derived opacity flag.
bool	enabled_
	Input enabled flag.
bool	enabledPrev_
	Last SetEnabled flag before any SetDeepEnabled.
bool	editable_
	Value editable flag.
bool	selected_
	Selected flag.
bool	visible_
	Visible flag.
bool	hovering_
	Hovering flag.
bool	internal_
	Internally created flag.
FocusMode	focusMode_
	Focus mode.
unsigned	dragDropMode_
	Drag and drop flags.
LayoutMode	layoutMode_
	Layout mode.
int	layoutSpacing_
	Layout spacing.
IntRect	layoutBorder_
	Layout borders.
Vector2	layoutFlexScale_
	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_
	Indent spacing (number of pixels per indentation level).
IntVector2	position_
	Position.
IntVector2	screenPosition_
	Screen position.
bool	positionDirty_
	Screen position dirty flag.
String	appliedStyle_
	Applied style.
int	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
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.
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 targetWidth, 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_
	Maximum size.
IntVector2	childOffset_
	Child elements' offset. Used internally.
IntVector2	layoutMinSize_
	Parent's minimum size calculated by layout. Used internally.
HorizontalAlignment	horizontalAlignment_
	Horizontal alignment.
VerticalAlignment	verticalAlignment_
	Vertical alignment.
float	opacity_
	Opacity.
float	derivedOpacity_
	Derived opacity.
Color	derivedColor_
	Derived color. Only valid when no gradient.
bool	opacityDirty_
	Derived opacity dirty flag.
bool	derivedColorDirty_
	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.
TraversalMode	traversalMode_
	Traversal mode for rendering.
bool	elementEventSender_
	Flag whether node should send child added / removed events by itself.

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

Detailed Description

Base class for UI elements.

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

• /home/travis/build/urho3d/Urho3D/Source/Urho3D/UI/UIElement.h
• /home/travis/build/urho3d/Urho3D/Source/Urho3D/UI/UIElement.cpp