EventPoint QML Type

Provides information about an individual point within a PointerEvent . 更多...

import 语句：

import QtQuick 2.15

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特性

accepted : bool
pointId : int
position : point
sceneGrabPosition : point
scenePosition : point
scenePressPosition : point
state : int
timeHeld : real
velocity : vector2d

详细描述

A PointerEvent contains an EventPoint for each point of contact: one corresponding to the mouse cursor, or one for each finger touching a touchscreen.

另请参阅 PointerEvent and PointerHandler .

特性文档编制

[read-only] accepted : bool

Indicates whether this point has been accepted during delivery thus far. This flag cannot be usefully set from QML.

[read-only] pointId : int

This property holds the ID of the point, if any.

Touchpoints have automatically-incrementing IDs: each time the user presses a finger against the touchscreen, it will be a larger number. In other cases, it will be -1.

另请参阅 uniqueId .

[read-only] position : point

This property holds the coordinates of the position supplied by the event, relative to the upper-left corner of the Item which has the PointerHandler . If a contact patch is available from the pointing device, this point represents its centroid.

[read-only] sceneGrabPosition : point

This property holds the scene-relative position at which the EventPoint was located when setGrabber() was called most recently.

[read-only] scenePosition : point

This property holds the coordinates of the position supplied by the event, relative to the scene. If a contact patch is available from the device , this point represents its centroid.

[read-only] scenePressPosition : point

This property holds the scene-relative position at which the press event (on a touch device) or most recent change in QQuickPointerEvent::buttons() (on a mouse or tablet stylus) occurred.

[read-only] state : int

This property tells what the user is currently doing at this point.

It can be one of:

常量	描述
`Pressed`	The user's finger is now pressing a touchscreen, button or stylus which was not pressed already
`Updated`	The touchpoint or position is being moved, with no change in pressed state
`Stationary`	The touchpoint or position is not being moved, and there is also no change in pressed state
`Released`	The user's finger has now released a touch point, button or stylus which was pressed

[read-only] timeHeld : real

This property holds the amount of time in seconds that the button or touchpoint has been held. It can be used to detect a "long press", and can drive an animation to show progress toward activation of the "long press" action.

[read-only] velocity : vector2d

This property holds average recent velocity: how fast and in which direction the event point has been moving recently.