Qt Quick QML 类型

Qt Quick 模块提供图形原语类型。这些类型仅在 QML 文档中可用,若该文档导入 QtQuick 名称空间。

要使用模块,import QtQuick 模块采用以下语句:

import QtQuick
							

拜访 Qt Quick 模块文档编制了解有关概念的更多信息,其中枢是 QtQuick .

子模块

Qt Quick 包括多个包含额外类型的子模块。

  • 本地存储 - 包含用于 SQLite 数据库的 JavaScript 接口的子模块
  • 粒子 - 为 QML 应用程序提供粒子系统
  • Controls - 提供一组可重用 UI 组件
  • 布局 - 包含用于在用户界面中排列项的类型
  • 测试 - 用于测试 QML 应用程序的类型。

基本类型

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

此外, QtQuick import provides the following basic types:

color

ARGB color value. The color type refers to an ARGB color value. It can be specified in a number of ways:

date

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

point

quaternion

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

rect

size

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

对象类型

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

Accessible

启用 QML 项的可访问性

AnchorAnimation

Animates changes in anchor values

AnchorChanges

指定如何按状态改变项锚点

AnimatedImage

Plays animations stored as a series of images

AnimatedSprite

绘制子画面动画

动画

所有 QML 动画的基

AnimationController

启用动画的手动控制

Animator

Is the base of all QML animators

行为

Defines a default animation for a property change

BorderImage

基于图像描绘边框

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

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"

可翻转

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

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

HandlerPoint

An event point

HoverHandler

Handler for mouse and tablet hover

图像

显示图像

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

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

QQuickPalette class contains color groups for each QML item state

ParallelAnimation

Enables animations to be run in parallel

ParentAnimation

Animates changes in parent values

ParentChange

指定如何在状态改变时重设项父级

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

基路径类型

PathInterpolator

Specifies how to manually animate along a path

PathLine

Defines a straight line

PathMove

移动路径的位置

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

PointerDeviceHandler

Abstract handler for pointer events with device-specific constraints

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

描述状态的新特性绑定或值

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

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

提供键盘快捷键

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

绘制子画面动画

State

定义对象和特性的配置

StateChangeScript

指定如何按状态运行脚本

StateGroup

为非项类型提供内置状态支持

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

TextEdit

Displays multiple lines of editable formatted text

TextInput

Displays an editable line of text

TextMetrics

Provides metrics for a given font and text

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

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

XAnimator

Type animates the x position of an Item

YAnimator

Type animates the y position of an Item