PathInterpolator QML Type

Specifies how to manually animate along a path. More...

Import Statement: import QtQuick 2.2

Properties

Detailed Description

PathInterpolator provides x, y, and angle information for a particular progress along a path.

In the following example, we animate a green rectangle along a bezier path.

 import QtQuick 2.0

 Rectangle {
     width: 400
     height: 400

     PathInterpolator {
         id: motionPath

         path: Path {
             startX: 0; startY: 0

             PathCubic {
                 x: 350; y: 350

                 control1X: 350; control1Y: 0
                 control2X: 0; control2Y: 350
             }
         }

         NumberAnimation on progress { from: 0; to: 1; duration: 2000 }
     }

     Rectangle {
         width: 50; height: 50
         color: "green"

         //bind our attributes to follow the path as progress changes
         x: motionPath.x
         y: motionPath.y
         rotation: motionPath.angle
     }
 }

Property Documentation

x : real

y : real

These properties hold the position of the path at progress.


angle : real

This property holds the angle of the path tangent at progress.

Angles are reported clockwise, with zero degrees at the 3 o'clock position.


path : Path

This property holds the path to interpolate.

For more information on defining a path see the Path documentation.


progress : real

This property holds the current progress along the path.

Typical usage of PathInterpolator is to set the progress (often via a NumberAnimation), and read the corresponding values for x, y, and angle (often via bindings to these values).

Progress ranges from 0.0 to 1.0.