Triangle Nip about bubble

[shinriyo]

@anasmuhamad98 Did you resolve it? Why don't you do pull-request?

[vi-k]

https://github.com/vi-k/bubble/issues/14

Thanks, shinriyo.

[anasmuhamad98]

import 'dart:ui';
import 'dart:math';
import 'package:flutter/material.dart';

enum BubbleNip { no, leftTop, leftBottom, rightTop, rightBottom, left }

/// Class BubbleEdges is an analog of EdgeInsets, but default values are null.
class BubbleEdges {
const BubbleEdges.fromLTRB(this.left, this.top, this.right, this.bottom);

const BubbleEdges.all(double value)
: left = value,
top = value,
right = value,
bottom = value;

const BubbleEdges.only({
this.left, // = null
this.top, // = null
this.right, // = null
this.bottom, // = null
});

const BubbleEdges.symmetric({
double vertical, // = null
double horizontal, // = null
}) : left = horizontal,
top = vertical,
right = horizontal,
bottom = vertical;

final double left;
final double top;
final double right;
final double bottom;

static get zero => BubbleEdges.all(0);

EdgeInsets get edgeInsets => EdgeInsets.fromLTRB(left ?? 0, top ?? 0, right ?? 0, bottom ?? 0);

@OverRide
String toString() => 'BubbleEdges($left, $top, $right, $bottom)';
}

class BubbleStyle {
const BubbleStyle({
this.radius,
this.nip,
this.nipWidth,
this.nipHeight,
this.nipOffset,
this.nipRadius,
this.stick,
this.color,
this.elevation,
this.shadowColor,
this.padding,
this.margin,
this.alignment,
});

final Radius radius;
final BubbleNip nip;
final double nipHeight;
final double nipWidth;
final double nipOffset;
final double nipRadius;
final bool stick;
final Color color;
final double elevation;
final Color shadowColor;
final BubbleEdges padding;
final BubbleEdges margin;
final Alignment alignment;
}

class BubbleClipper extends CustomClipper {
BubbleClipper({
this.radius,
this.nip,
this.nipWidth,
this.nipHeight,
this.nipOffset,
this.nipRadius,
this.stick,
this.padding,
}) : assert(nipWidth > 0.0),
assert(nipHeight > 0.0),
assert(nipRadius >= 0.0),
assert(nipRadius <= nipWidth / 2.0 && nipRadius <= nipHeight / 2.0),
assert(nipOffset >= 0.0),
// assert(radius <= nipHeight + nipOffset),
assert(padding != null),
assert(padding.left != null),
assert(padding.top != null),
assert(padding.right != null),
assert(padding.bottom != null),
super() {

_startOffset = _endOffset = nipWidth;

var k = nipHeight / nipWidth;
var a = atan(k);

_nipCX = (nipRadius + sqrt(nipRadius * nipRadius * (1 + k * k))) / k;
var nipStickOffset = (_nipCX - nipRadius).floorToDouble();

_nipCX -= nipStickOffset;
_nipCY = nipRadius;
_nipPX = _nipCX - nipRadius * sin(a);
_nipPY = _nipCY + nipRadius * cos(a);
_startOffset -= nipStickOffset;
_endOffset -= nipStickOffset;

if (stick) _endOffset = 0.0;

}

final Radius radius;
final BubbleNip nip;
final double nipHeight;
final double nipWidth;
final double nipOffset;
final double nipRadius;
final bool stick;
final BubbleEdges padding;

double _startOffset; // Offsets of the bubble
double _endOffset;
double _nipCX; // The center of the circle
double _nipCY;
double _nipPX; // The point of contact of the nip with the circle
double _nipPY;

get edgeInsets {
return nip == BubbleNip.leftTop || nip == BubbleNip.leftBottom || nip == BubbleNip.left
? EdgeInsets.only(
left: _startOffset + padding.left,
top: padding.top,
right: _endOffset + padding.right,
bottom: padding.bottom)
: nip == BubbleNip.rightTop || nip == BubbleNip.rightBottom
? EdgeInsets.only(
left: _endOffset + padding.left,
top: padding.top,
right: _startOffset + padding.right,
bottom: padding.bottom)
: EdgeInsets.only(
left: _endOffset + padding.left,
top: padding.top,
right: _endOffset + padding.right,
bottom: padding.bottom);
}

@OverRide
Path getClip(Size size) {
var radiusX = radius.x;
var radiusY = radius.y;
var maxRadiusX = size.width / 2;
var maxRadiusY = size.height / 2;

if (radiusX > maxRadiusX) {
  radiusY *= maxRadiusX / radiusX;
  radiusX = maxRadiusX;
}
if (radiusY > maxRadiusY) {
  radiusX *= maxRadiusY / radiusY;
  radiusY = maxRadiusY;
}

var path = Path();

switch (nip) {

  case BubbleNip.left:
    path.addRRect(RRect.fromLTRBR(_startOffset, 0,
        size.width - _endOffset, size.height, radius));

    path.moveTo(_startOffset + radiusX, nipOffset);
    path.lineTo(_startOffset + radiusX, nipOffset + nipHeight);
    path.lineTo(_startOffset, nipOffset + nipHeight);
    path.lineTo(0, nipOffset + (nipHeight / 2) );
    path.lineTo(_startOffset, nipOffset);
    
    path.close();
    break;
    
    
    path.close();
    break;

  case BubbleNip.leftTop:
    path.addRRect(RRect.fromLTRBR(_startOffset, 0,
        size.width - _endOffset, size.height, radius));

    path.moveTo(_startOffset + radiusX, nipOffset);
    path.lineTo(_startOffset + radiusX, nipOffset + nipHeight);
    path.lineTo(_startOffset, nipOffset + nipHeight);
    if (nipRadius == 0) {
      path.lineTo(0, nipOffset);
    } else {
      path.lineTo(_nipPX, nipOffset + _nipPY);
      path.arcToPoint(Offset(_nipCX, nipOffset), radius: Radius.circular(nipRadius));
    }
    path.close();
    break;

  case BubbleNip.leftBottom:
    path.addRRect(RRect.fromLTRBR(_startOffset, 0, size.width - _endOffset, size.height, radius));

    Path path2 = Path();
    path2.moveTo(_startOffset + radiusX, size.height - nipOffset);
    path2.lineTo(_startOffset + radiusX, size.height - nipOffset - nipHeight);
    path2.lineTo(_startOffset, size.height - nipOffset - nipHeight);
    if (nipRadius == 0) {
      path2.lineTo(0, size.height - nipOffset);
    } else {
      path2.lineTo(_nipPX, size.height - nipOffset - _nipPY);
      path2.arcToPoint(Offset(_nipCX, size.height - nipOffset),
          radius: Radius.circular(nipRadius), clockwise: false);
    }
    path2.close();

    path.addPath(path2, Offset(0, 0));
    path.addPath(path2, Offset(0, 0)); // Magic!
    break;

  case BubbleNip.rightTop:
    path.addRRect(RRect.fromLTRBR(_endOffset, 0, size.width - _startOffset, size.height, radius));

    Path path2 = Path();
    path2.moveTo(size.width - _startOffset - radiusX, nipOffset);
    path2.lineTo(size.width - _startOffset - radiusX, nipOffset + nipHeight);
    path2.lineTo(size.width - _startOffset, nipOffset + nipHeight);
    if (nipRadius == 0) {
      path2.lineTo(size.width, nipOffset);
    } else {
      path2.lineTo(size.width - _nipPX, nipOffset + _nipPY);
      path2.arcToPoint(Offset(size.width - _nipCX, nipOffset),
          radius: Radius.circular(nipRadius), clockwise: false);
    }
    path2.close();

    path.addPath(path2, Offset(0, 0));
    path.addPath(path2, Offset(0, 0)); // Magic!
    break;

  case BubbleNip.rightBottom:
    path.addRRect(RRect.fromLTRBR(_endOffset, 0, size.width - _startOffset, size.height, radius));

    path.moveTo(size.width - _startOffset - radiusX, size.height - nipOffset);
    path.lineTo(size.width - _startOffset - radiusX, size.height - nipOffset - nipHeight);
    path.lineTo(size.width - _startOffset, size.height - nipOffset - nipHeight);
    if (nipRadius == 0) {
      path.lineTo(size.width, size.height - nipOffset);
    } else {
      path.lineTo(size.width - _nipPX, size.height - nipOffset - _nipPY);
      path.arcToPoint(Offset(size.width - _nipCX, size.height - nipOffset),
          radius: Radius.circular(nipRadius));
    }
    path.close();
    break;

  case BubbleNip.no:
    path.addRRect(RRect.fromLTRBR(_endOffset, 0, size.width - _endOffset, size.height, radius));
    break;
}

return path;

}

@OverRide
bool shouldReclip(BubbleClipper oldClipper) => false;
}

class Bubble extends StatelessWidget {
Bubble({
this.child,
Radius radius,
BubbleNip nip,
double nipWidth,
double nipHeight,
double nipOffset,
double nipRadius,
bool stick,
Color color,
double elevation,
Color shadowColor,
BubbleEdges padding,
BubbleEdges margin,
Alignment alignment,
BubbleStyle style,
}) : color = color ?? style?.color ?? Colors.white,
elevation = elevation ?? style?.elevation ?? 1.0,
shadowColor = shadowColor ?? style?.shadowColor ?? Colors.black,
margin = BubbleEdges.only(
left: margin?.left ?? style?.margin?.left ?? 0.0,
top: margin?.top ?? style?.margin?.top ?? 0.0,
right: margin?.right ?? style?.margin?.right ?? 0.0,
bottom: margin?.bottom ?? style?.margin?.bottom ?? 0.0,
),
alignment = alignment ?? style?.alignment ?? null,
bubbleClipper = BubbleClipper(
radius: radius ?? style?.radius ?? Radius.circular(6.0),
nip: nip ?? style?.nip ?? BubbleNip.no,
nipWidth: nipWidth ?? style?.nipWidth ?? 8.0,
nipHeight: nipHeight ?? style?.nipHeight ?? 10.0,
nipOffset: nipOffset ?? style?.nipOffset ?? 0.0,
nipRadius: nipRadius ?? style?.nipRadius ?? 1.0,
stick: stick ?? style?.stick ?? false,
padding: BubbleEdges.only(
left: padding?.left ?? style?.padding?.left ?? 8.0,
top: padding?.top ?? style?.padding?.top ?? 6.0,
right: padding?.right ?? style?.padding?.right ?? 8.0,
bottom: padding?.bottom ?? style?.padding?.bottom ?? 6.0,
),
);

final Widget child;
final Color color;
final double elevation;
final Color shadowColor;
final BubbleEdges margin;
final Alignment alignment;
final BubbleClipper bubbleClipper;

Widget build(context) {
return Container(
alignment: alignment,
margin: margin?.edgeInsets,
child: PhysicalShape(
clipBehavior: Clip.antiAlias,
clipper: bubbleClipper,
child: Container(padding: bubbleClipper.edgeInsets, child: child),
color: color,
elevation: elevation,
shadowColor: shadowColor,
));
}
}

[shinriyo]

@vi-k you're welcome.
There are few plugins in the Flutter world.
Almost all people rely on the plugin.