TextMagnifier class
A Magnifier positioned by rules dictated by the native Android magnifier.
The positioning rules are based on magnifierInfo, as follows:
-
The loupe tracks the gesture's x coordinate, clamping to the beginning and end of the currently editing line.
-
The focal point never contains anything out of the bounds of the text field or other widget being magnified (the MagnifierInfo.fieldBounds).
-
The focal point always remains aligned with the y coordinate of the touch.
-
The loupe always remains on the screen.
-
When the line targeted by the touch's y coordinate changes, the position is animated over jumpBetweenLinesAnimationDuration.
This behavior was based on the Android 12 source code, where possible, and on eyeballing a Pixel 6 running Android 12 otherwise.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- TextMagnifier
Constructors
-
TextMagnifier({Key? key, required ValueNotifier<
MagnifierInfo> magnifierInfo}) -
Creates a TextMagnifier.
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
-
magnifierInfo
→ ValueNotifier<
MagnifierInfo> -
The current status of the user's touch.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< TextMagnifier> -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toDiagnosticsNode(
{String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString(
{DiagnosticLevel minLevel = DiagnosticLevel.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow(
{String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a one-line detailed description of the object.
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Properties
- adaptiveMagnifierConfiguration ↔ TextMagnifierConfiguration
-
A TextMagnifierConfiguration that returns a CupertinoTextMagnifier on
iOS, TextMagnifier on Android, and null on all other platforms, and
shows the editing handles only on iOS.
getter/setter pair
Constants
- jumpBetweenLinesAnimationDuration → const Duration
- The duration that the position is animated if TextMagnifier just switched between lines.