Provides information about a pointing device. 更多...
| import 语句： | import QtQuick 2.12 |
A pointing device can be a mouse, a touchscreen, or a stylus on a graphics tablet.
另请参阅 PointerEvent and PointerHandler .
|
[read-only] capabilities : enumeration |
This property holds a bitwise combination of the capabilities of the pointing device. It tells you under which conditions events are sent, and which properties of PointerEvent are expected to be valid.
Valid values are:
| 常量 | 描述 |
|---|---|
CapabilityFlag.Position
|
the position and scenePosition properties |
CapabilityFlag.Area
|
the ellipseDiameters property |
CapabilityFlag.Pressure
|
the pressure property |
CapabilityFlag.Velocity
|
the velocity property |
CapabilityFlag.Scroll
|
a 鼠标 has a wheel, or the operating system recognizes scroll gestures on a TouchPad |
CapabilityFlag.Hover
|
events are sent even when no button is pressed, or the finger or stylus is not in contact with the surface |
CapabilityFlag.Rotation
|
the rotation property |
CapabilityFlag.XTilt
|
horizontal angle between a stylus and the axis perpendicular to the surface |
CapabilityFlag.YTilt
|
vertical angle between a stylus and the axis perpendicular to the surface |
另请参阅 QTouchDevice::capabilities .
|
[read-only] pointerType : enumeration |
This property holds a value indicating what is interacting with the device. Think of the device as having a planar 2D surface, and the value of this property as identifying what interacts with the device.
There is some redundancy between this property and PointerDevice::type . If a tocuchscreen is used, then the device is TouchScreen and pointerType is Finger (always).
Valid values are:
| 常量 | 描述 |
|---|---|
PointerDevice.GenericPointer
|
a mouse or something acting like a mouse (the core pointer on X11) |
PointerDevice.Finger
|
the user's finger |
PointerDevice.Pen
|
the drawing end of a stylus |
PointerDevice.Eraser
|
the other end of the stylus (if it has a virtual eraser on the other end) |
PointerDevice.Cursor
|
a cursor in the pre-computer sense of the word |
PointerDevice.AllPointerTypes
|
any of the above (used as a default value in constructors) |
|
[read-only] type : enumeration |
This property holds the type of the pointing device.
Valid values are:
| 常量 | 描述 |
|---|---|
DeviceType.UnknownDevice
|
the device cannot be identified |
DeviceType.Mouse
|
a mouse |
DeviceType.TouchScreen
|
a touchscreen providing absolute coordinates |
DeviceType.TouchPad
|
a trackpad or touchpad providing relative coordinates |
DeviceType.Stylus
|
a pen-like device |
DeviceType.Airbrush
|
a stylus with a thumbwheel to adjust tangentialPressure |
DeviceType.Puck
|
a device that is similar to a flat mouse with a transparent circle with cross-hairs (same as Puck ) |
DeviceType.AllDevices
|
any of the above; used as a default value for construction |
另请参阅 QTouchDevice::DeviceType .
