io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack Class Reference

Classes
class	FlutterMutator
enum	FlutterMutatorType

Public Member Functions
	FlutterMutatorsStack ()
void	pushTransform (float[] values)
void	pushClipRect (int left, int top, int right, int bottom)
void	pushClipRRect (int left, int top, int right, int bottom, float[] radiis)
List< FlutterMutator >	getMutators ()
List< Path >	getFinalClippingPaths ()
Matrix	getFinalMatrix ()

Detailed Description

The mutator stack containing a list of mutators

The mutators can be applied to a io.flutter.plugin.platform.PlatformView to perform a series mutations. See FlutterMutatorsStack.FlutterMutator for informations on Mutators.

Definition at line 24 of file FlutterMutatorsStack.java.

Constructor & Destructor Documentation

FlutterMutatorsStack()

io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.FlutterMutatorsStack ( )

inline

Initialize the mutator stack.

Definition at line 139 of file FlutterMutatorsStack.java.

                                {
    this.mutators = new ArrayList<FlutterMutator>();
    finalMatrix = new Matrix();
    finalClippingPaths = new ArrayList<Path>();
  }

Member Function Documentation

getFinalClippingPaths()

List< Path > io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.getFinalClippingPaths ( )

inline

Get a list of all the clipping operations. All the clipping operations – whether it is clip rect, clip rrect, or clip path – are converted into Paths. The paths are also transformed with the matrix that up to their stack positions. For example: If the stack looks like (from top to bottom): TransA -> ClipA -> TransB -> ClipB, the final paths will look like [TransA*ClipA, TransA*TransB*ClipB].

Clipping this list to the parent canvas of a view results the final clipping path.

Definition at line 206 of file FlutterMutatorsStack.java.

                                            {
    return finalClippingPaths;
  }

getFinalMatrix()

Matrix io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.getFinalMatrix ( )

inline

Returns the final matrix. Apply this matrix to the canvas of a view results the final transformation of the view.

Definition at line 214 of file FlutterMutatorsStack.java.

                                 {
    return finalMatrix;
  }

getMutators()

List< FlutterMutator > io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.getMutators ( )

inline

Get a list of all the raw mutators. The 0 index of the returned list is the top of the stack.

Definition at line 193 of file FlutterMutatorsStack.java.

                                            {
    return mutators;
  }

pushClipRect()

void io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.pushClipRect ( int  left, int  top, int  right, int  bottom  )

inline

Push a clipRect FlutterMutatorsStack.FlutterMutator to the stack.

Definition at line 160 of file FlutterMutatorsStack.java.

                                                                     {
    Rect rect = new Rect(left, top, right, bottom);
    FlutterMutator mutator = new FlutterMutator(rect);
    mutators.add(mutator);
    Path path = new Path();
    path.addRect(new RectF(rect), Path.Direction.CCW);
    path.transform(finalMatrix);
    finalClippingPaths.add(path);
  }

pushClipRRect()

void io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.pushClipRRect ( int  left, int  top, int  right, int  bottom, float[]  radiis  )

inline

Push a clipRRect FlutterMutatorsStack.FlutterMutator to the stack.

Parameters

left	left offset of the rrect.
top	top offset of the rrect.
right	right position of the rrect.
bottom	bottom position of the rrect.
radiis	the radiis of the rrect. It must be size of 8, including an x and y for each corner.

Definition at line 180 of file FlutterMutatorsStack.java.

                                                                                      {
    Rect rect = new Rect(left, top, right, bottom);
    FlutterMutator mutator = new FlutterMutator(rect, radiis);
    mutators.add(mutator);
    Path path = new Path();
    path.addRoundRect(new RectF(rect), radiis, Path.Direction.CCW);
    path.transform(finalMatrix);
    finalClippingPaths.add(path);
  }

pushTransform()

void io.flutter.embedding.engine.mutatorsstack.FlutterMutatorsStack.pushTransform ( float[]  values )

inline

Push a transform FlutterMutatorsStack.FlutterMutator to the stack.

Parameters

values

the transform matrix to be pushed to the stack. The array matches how a android.graphics.Matrix is constructed.

Definition at line 151 of file FlutterMutatorsStack.java.

                                            {
    Matrix matrix = new Matrix();
    matrix.setValues(values);
    FlutterMutator mutator = new FlutterMutator(matrix);
    mutators.add(mutator);
    finalMatrix.preConcat(mutator.getMatrix());
  }

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The documentation for this class was generated from the following file:

• shell/platform/android/io/flutter/embedding/engine/mutatorsstack/FlutterMutatorsStack.java