QML Rotation Element

The Rotation object provides a way to rotate an Item. More...

Rotation instantiates the C++ class QGraphicsRotation

This element was introduced in Qt 4.7.

• List of all members, including inherited members

Properties

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

Detailed Description

The Rotation object gives more control over rotation than using Item's rotation property. Specifically, it allows (z axis) rotation to be relative to an arbitrary point.

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}
 }

Rotation also provides a way to specify 3D-like rotations for Items. For these types of rotations you must specify the axis to rotate around in addition to the origin point.

The following example shows various 3D-like rotations applied to an Image.

 import QtQuick 1.0

 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 }
         smooth: true
     }
     Image {
         source: "pics/qt.png"
         transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 36 }
         smooth: true
     }
     Image {
         source: "pics/qt.png"
         transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 54 }
         smooth: true
     }
     Image {
         source: "pics/qt.png"
         transform: Rotation { origin.x: 30; origin.y: 30; axis { x: 0; y: 1; z: 0 } angle: 72 }
         smooth: true
     }
 }

See also Dial Control example and Clocks example.

Property Documentation