Qt Quick QML Types

The Qt Quick module provides graphical primitive types. These types are only available in a QML document if that document imports the QtQuick namespace.

To use the module, import the QtQuick module with the following statement:

 import QtQuick

Visit the Qt Quick module documentation for more information about the concepts that are central to QtQuick.

Submodules

Qt Quick includes several submodules that contain additional types:

  • Local Storage - a submodule containing a JavaScript interface for an SQLite database
  • Particles - provides a particle system for QML applications
  • Controls - provides a set of reusable UI components
  • Layouts - contains types that are used to arrange items in the user interface
  • Tests - types for testing QML applications.
  • Effects - provides types for applying one or more simple graphical effects to Qt Quick items.
  • Shapes - provides types for rendering vector shapes in a Qt Quick scene.

Value Types

There are a number of value types that are supported by default in the QML language.

In addition, the QtQuick import provides the following value types:

color

ARGB color value

font

Font value with the properties of QFont. The font type refers to a font value with the properties of QFont

matrix4x4

A matrix4x4 type is a 4-row and 4-column matrix

quaternion

A quaternion type has scalar, x, y, and z attributes

vector2d

A vector2d type has x and y attributes

vector3d

Value with x, y, and z attributes

vector4d

A vector4d type has x, y, z and w attributes

Object Types

Most object types provided by the QtQuick import are based on the Item type, which itself derives from QtObject. QML object types provided by the Qt QML module (such as QtObject and Component) are also available when you import QtQuick.

Accessible

Enables accessibility of QML items

AnchorAnimation

Animates changes in anchor values

AnchorChanges

Specifies how to change the anchors of an item in a state

AnimatedImage

Plays animations stored as a series of images

AnimatedSprite

Draws a sprite animation

Animation

Is the base of all QML animations

AnimationController

Enables manual control of animations

Animator

Is the base of all QML animators

Application

Provides access to global application state properties shared by many QML components

Behavior

Defines a default animation for a property change

BorderImage

Paints a border based on an image

BorderImageMesh

Defines a mesh with vertices arranged like those of a BorderImage

Canvas

Provides a 2D canvas item enabling drawing via JavaScript

CanvasGradient

Provides an opaque CanvasGradient interface

CanvasImageData

Contains image pixel data in RGBA order

CanvasPixelArray

Provides ordered and indexed access to the components of each pixel in image data

CloseEvent

Notification that a Window is about to be closed

ColorAnimation

Animates changes in color values

ColorGroup

Set of colors by roles

Column

Positions its children in a column

Context2D

Provides 2D context for shapes on a Canvas item

DoubleValidator

Defines a validator for non-integer numbers

Drag

For specifying drag and drop events for moved Items

DragEvent

Provides information about a drag event

DragHandler

Handler for dragging

DropArea

For specifying drag and drop handling in an area

EnterKey

Provides a property to manipulate the appearance of Enter key on an on-screen keyboard

Flickable

Provides a surface that can be "flicked"

Flipable

Provides a surface that can be flipped

Flow

Positions its children side by side, wrapping as necessary

FocusScope

Explicitly creates a focus scope

FontLoader

Allows fonts to be loaded by URL

FontMetrics

Provides metrics for a given font

FrameAnimation

Triggers a handler at every animation frame update

GestureEvent

Parameter given with the gestureStarted signal

Gradient

Defines a gradient fill

GradientStop

Defines the color at a position in a Gradient

GraphicsInfo

Provides information about the scenegraph backend and the graphics API used by Qt Quick

Grid

Positions its children in grid formation

GridMesh

Defines a mesh with vertices arranged in a grid

GridView

For specifying a grid view of items provided by a model

HoverHandler

Handler for mouse and tablet hover

Image

Displays an image

InputMethod

Provides access to QInputMethod for QML applications

IntValidator

Defines a validator for integer values

Item

A basic visual QML type

ItemGrabResult

Contains the results from a call to Item::grabToImage()

KeyEvent

Provides information about a key event

KeyNavigation

Supports key navigation by arrow keys

Keys

Provides key handling to Items

LayoutMirroring

Property used to mirror layout behavior

ListView

Provides a list view of items provided by a model

Loader

Allows dynamic loading of a subtree from a URL or Component

Matrix4x4

Provides a way to apply a 4x4 tranformation matrix to an Item

MouseArea

Enables simple mouse handling

MouseEvent

Provides information about a mouse event

MultiPointHandler

Abstract handler for multi-point Pointer Events

MultiPointTouchArea

Enables handling of multiple touch points

NumberAnimation

Animates changes in qreal-type values

OpacityAnimator

Type animates the opacity of an Item

Palette

Contains color groups for each QML item state

ParallelAnimation

Enables animations to be run in parallel

ParentAnimation

Animates changes in parent values

ParentChange

Specifies how to reparent an Item in a state change

Path

Defines a path for use by PathView and Shape

PathAngleArc

Defines an arc with the given radii and center

PathAnimation

Animates an item along a path

PathArc

Defines an arc with the given radius

PathAttribute

Specifies how to set an attribute at a given position in a Path

PathCubic

Defines a cubic Bezier curve with two control points

PathCurve

Defines a point on a Catmull-Rom curve

PathElement

The base path type

PathInterpolator

Specifies how to manually animate along a path

PathLine

Defines a straight line

PathMove

Moves the Path's position

PathMultiline

Defines a set of polylines through a list of lists of coordinates

PathPercent

Manipulates the way a path is interpreted

PathPolyline

Defines a polyline through a list of coordinates

PathQuad

Defines a quadratic Bezier curve with a control point

PathSvg

Defines a path using an SVG path data string

PathText

Defines a string in a specified font

PathView

Lays out model-provided items on a path

PauseAnimation

Provides a pause for an animation

PinchArea

Enables simple pinch gesture handling

PinchEvent

For specifying information about a pinch event

PinchHandler

Handler for pinch gestures

PointHandler

Handler for reacting to a single touchpoint

PointerDevice

QML equivalent for QPointingDevice

PointerDeviceHandler

Abstract handler for pointer events with device-specific constraints

PointerEvent

QML equivalent for QPointerEvent

PointerHandler

Abstract handler for pointer events

Positioner

Provides attached properties that contain details on where an item exists in a positioner

PropertyAction

Specifies immediate property changes during animation

PropertyAnimation

Animates changes in property values

PropertyChanges

Describes new property bindings or values for a state

Rectangle

Paints a filled rectangle with an optional border

RegularExpressionValidator

Provides a string validator

Repeater

Instantiates a number of Item-based components using a provided model

Rotation

Provides a way to rotate an Item

RotationAnimation

Animates changes in rotation values

RotationAnimator

Type animates the rotation of an Item

Row

Positions its children in a row

Scale

Provides a way to scale an Item

ScaleAnimator

Type animates the scale factor of an Item

Screen

Attached object provides information about the Screen an Item or Window is displayed on

ScriptAction

Defines scripts to be run during an animation

SequentialAnimation

Allows animations to be run sequentially

ShaderEffect

Applies custom shaders to a rectangle

ShaderEffectSource

Renders a Qt Quick item into a texture and displays it

Shortcut

Provides keyboard shortcuts

SinglePointHandler

Abstract handler for single-point Pointer Events

SmoothedAnimation

Allows a property to smoothly track a value

SpringAnimation

Allows a property to track a value in a spring-like motion

Sprite

Specifies sprite animations

SpriteSequence

Draws a sprite animation

State

Defines configurations of objects and properties

StateChangeScript

Specifies how to run a script in a state

StateGroup

Provides built-in state support for non-Item types

SystemPalette

Provides access to the Qt palettes

TableView

Provides a table view of items to display data from a model

TapHandler

Handler for taps and clicks

Text

Specifies how to add formatted text to a scene

TextDocument

A wrapper around TextEdit's backing QTextDocument

TextEdit

Displays multiple lines of editable formatted text

TextInput

Displays an editable line of text

TextMetrics

Provides metrics for a given font and text

TextSelection

Represents a contiguous selection of text and its properties

TouchPoint

Describes a touch point in a MultiPointTouchArea

Transform

For specifying advanced transformations on Items

Transition

Defines animated transitions that occur on state changes

Translate

Provides a way to move an Item without changing its x or y properties

TreeView

Provides a tree view to display data from a QAbstractItemModel

UniformAnimator

Type animates a uniform of a ShaderEffect

Vector3dAnimation

Animates changes in QVector3d values

ViewTransition

Specifies items under transition in a view

WheelEvent

Provides information about a mouse wheel event

WheelHandler

Handler for the mouse wheel

Window

Creates a new top-level window

WindowContainer

Allows embedding arbitrary QWindows into a Qt Quick scene

XAnimator

Type animates the x position of an Item

YAnimator

Type animates the y position of an Item

eventPoint

Qml equivalent for QEventPoint

handlerPoint

An event point

pointingDeviceUniqueId

QML equivalent for QPointingDeviceUniqueId