PointerData class
Information about the state of a pointer.
Constructors
- PointerData({Duration timeStamp: Duration.zero, PointerChange change: PointerChange.cancel, PointerDeviceKind kind: PointerDeviceKind.touch, int device: 0, double physicalX: 0.0, double physicalY: 0.0, int buttons: 0, bool obscured: false, double pressure: 0.0, double pressureMin: 0.0, double pressureMax: 0.0, double distance: 0.0, double distanceMax: 0.0, double size: 0.0, double radiusMajor: 0.0, double radiusMinor: 0.0, double radiusMin: 0.0, double radiusMax: 0.0, double orientation: 0.0, double tilt: 0.0, int platformData: 0 })
-
Creates an object that represents the state of a pointer.
const
Properties
-
Bit field using the *Button constants (primaryMouseButton,
secondaryStylusButton, etc). For example, if this has the value 6 and the
kind is PointerDeviceKind.invertedStylus, then this indicates an
upside-down stylus with both its primary and secondary buttons pressed.
final
- change → PointerChange
-
How the pointer has changed since the last report.
final
- device → int
-
Unique identifier for the pointing device, reused across interactions.
final
- distance → double
-
The distance of the detected object from the input surface (e.g. the
distance of a stylus or finger from a touch screen), in arbitrary units on
an arbitrary (not necessarily linear) scale. If the pointer is down, this
is 0.0 by definition.
final
- distanceMax → double
-
The maximum value that a distance can return for this pointer. If this
input device cannot detect "hover touch" input events, then this will be
0.0.
final
- kind → PointerDeviceKind
-
The kind of input device for which the event was generated.
final
- obscured → bool
-
Set if an application from a different security domain is in any way
obscuring this application's window. (Aspirational; not currently
implemented.)
final
- orientation → double
-
For PointerDeviceKind.touch events: [...]
final
- physicalX → double
-
X coordinate of the position of the pointer, in physical pixels in the
global coordinate space.
final
- physicalY → double
-
Y coordinate of the position of the pointer, in physical pixels in the
global coordinate space.
final
- platformData → int
-
Opaque platform-specific data associated with the event.
final
- pressure → double
-
The pressure of the touch as a number ranging from 0.0, indicating a touch
with no discernible pressure, to 1.0, indicating a touch with "normal"
pressure, and possibly beyond, indicating a stronger touch. For devices
that do not detect pressure (e.g. mice), returns 1.0.
final
- pressureMax → double
-
The maximum value that pressure can return for this pointer. For devices
that do not detect pressure (e.g. mice), returns 1.0. This will always be
a greater than or equal to 1.0.
final
- pressureMin → double
-
The minimum value that pressure can return for this pointer. For devices
that do not detect pressure (e.g. mice), returns 1.0. This will always be
a number less than or equal to 1.0.
final
- radiusMajor → double
-
The radius of the contact ellipse along the major axis, in logical pixels.
final
- radiusMax → double
-
The minimum value that could be reported for radiusMajor and radiusMinor
for this pointer, in logical pixels.
final
- radiusMin → double
-
The minimum value that could be reported for radiusMajor and radiusMinor
for this pointer, in logical pixels.
final
- radiusMinor → double
-
The radius of the contact ellipse along the minor axis, in logical pixels.
final
- size → double
-
The area of the screen being pressed, scaled to a value between 0 and 1.
The value of size can be used to determine fat touch events. This value
is only set on Android, and is a device specific approximation within
the range of detectable values. So, for example, the value of 0.1 could
mean a touch with the tip of the finger, 0.2 a touch with full finger,
and 0.3 the full palm.
final
- tilt → double
-
For PointerDeviceKind.stylus and PointerDeviceKind.invertedStylus events: [...]
final
- timeStamp → Duration
-
Time of event dispatch, relative to an arbitrary timeline.
final
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
toString(
) → String -
Returns a string representation of this object.
override
-
toStringFull(
) → String - Returns a complete textual description of the information in this object.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited