Rotation QML Type

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

import 语句：

import QtQuick 2.15

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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.