For specifying information about a pinch event. 更多...
import 语句: | import QtQuick 2.15 |
The PinchEvent type was added in QtQuick 1.1
The
center
,
startCenter
,
previousCenter
properties provide the center position between the two touch points.
The
scale
and
previousScale
properties provide the scale factor.
The
angle
,
previousAngle
and
rotation
properties provide the angle between the two points and the amount of rotation.
The
point1
,
point2
,
startPoint1
,
startPoint2
properties provide the positions of the touch points.
The
accepted
property may be set to false in the
onPinchStarted
handler if the gesture should not be handled.
另请参阅 PinchArea .
These properties provide the actual touch points generating the pinch.
point1
and
point2
hold the current positions of the points.
startPoint1
and
startPoint2
hold the positions of the points when the second point was touched.
angle : real |
previousAngle : real |
rotation : real |
These properties hold the angle between the two touch points.
angle
is the current angle between the two points in the range -180 to 180.
previousAngle
is the angle of the previous event.
rotation
is the total rotation since the pinch gesture started.
When a pinch gesture is started, the rotation is
0.0
.
previousScale : real |
scale : real |
These properties hold the scale factor determined by the change in distance between the two touch points.
scale
is the current scale factor.
previousScale
is the scale factor of the previous event.
When a pinch gesture is started, the scale is
1.0
.
These properties hold the position of the center point between the two touch points.
center
is the current center point
previousCenter
is the center point of the previous event.
startCenter
is the center point when the gesture began
accepted : bool |
Setting this property to false in the
PinchArea::onPinchStarted
handler will result in no further pinch events being generated, and the gesture ignored.
pointCount : int |
Holds the number of points currently touched. The PinchArea will not react until two touch points have initited a gesture, but will remain active until all touch points have been released.