Provides a way to rotate an Item. 更多...
导入语句: | import QtQuick 2.2 |
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 图像 .
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 .
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).