Rotation QML Type

Provides a way to rotate an Item. 更多...

import 语句：

import QtQuick 2.12

所有成员列表，包括继承成员

特性

angle : real
axis
- axis.x : real
- axis.y : real
- axis.z : real
origin
- origin.x : real
- origin.y : real

详细描述

The Rotation type provides a way to rotate an Item through a rotation-type transform.

It allows (z axis) rotation to be relative to an arbitrary point, and also provides a way to specify 3D-like rotations for Items. This gives more control over item rotation than the rotation 特性。

The following example rotates a Rectangle around its interior point (25, 25):

Rectangle {
    width: 100; height: 100
    color: "blue"
    transform: Rotation { origin.x: 25; origin.y: 25; angle: 45}
}

For 3D-like item rotations, you must specify the axis of rotation in addition to the origin point. The following example shows various 3D-like rotations applied to an Image .

import QtQuick 2.0
Row {
    x: 10; y: 10
    spacing: 10
    Image { source: "pics/qt.png" }
    Image {
        source: "pics/qt.png"
        transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 18 }
    }
    Image {
        source: "pics/qt.png"
        transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 36 }
    }
    Image {
        source: "pics/qt.png"
        transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 54 }
    }
    Image {
        source: "pics/qt.png"
        transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 72 }
    }
}

另请参阅 Dial Control example and Qt Quick 演示 - 时钟 .

特性文档编制

angle : real

The angle to rotate, in degrees clockwise.

axis group
axis.x : real
axis.y : real
axis.z : real

The axis to rotate around. For simple (2D) rotation around a point, you do not need to specify an axis, as the default axis is the z axis ( axis { x: 0; y: 0; z: 1 } ).

For a typical 3D-like rotation you will usually specify both the origin and the axis.

origin group
origin.x : real
origin.y : real

The origin point of the rotation (i.e., the point that stays fixed relative to the parent as the rest of the item rotates). By default the origin is (0, 0).