Qt 5.9 | Qt Quick | QML Types | PathInterpolator QML Type

Qt 5.9.9 Reference Documentation

# PathInterpolator QML Type

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

Import Statement: | import QtQuick 2.7

- List of all members, including inherited members

## Properties

- angle : real
- path : Path
- progress : real
- x : real
- y : real

## 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

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.

x : real

These properties hold the position of the path at progress.

y : real

These properties hold the position of the path at progress.