How Can I create this shape using custom paint in Flutter, Here the blue water wave will show the water level in the tank. Two Examples are shown here for 44% and 56%. It will come through zero to exact value through a Tween Animation. I have tried it but can’t be satisfied through it as I’ve a little bit experience in custom paint. Here is the what I have done.
class FuelTankCustomPainter extends CustomPainter {
FuelTankCustomPainter(this.context, this.value);
final BuildContext context;
final double value;
@override
void paint(Canvas canvas, Size size) {
// assuming the original design width is 180 (width scale)
double ws = size.width / 180;
// assuming the original design height is 216 (height scale)
double hs = size.height / 216;
Path bgPath = Path();
bgPath.moveTo(82.9262 * ws, 16.5416 * hs);
bgPath.cubicTo(
84.9174 * ws,
14.8986 * hs,
87.4185 * ws,
14 * hs,
90 * ws,
14 * hs,
);
bgPath.cubicTo(
92.5816 * ws,
14 * hs,
95.0826 * ws,
14.8986 * hs,
97.0738 * ws,
16.5416 * hs,
);
bgPath.cubicTo(
110.61 * ws,
27.7963 * hs,
123.011 * ws,
40.3491 * hs,
134.101 * ws,
54.0205 * hs,
);
bgPath.cubicTo(
149.548 * ws,
73.2261 * hs,
165.353 * ws,
99.2889 * hs,
165.353 * ws,
126.548 * hs,
);
bgPath.cubicTo(
165.353 * ws,
146.533 * hs,
157.414 * ws,
165.699 * hs,
143.283 * ws,
179.831 * hs,
);
bgPath.cubicTo(
129.151 * ws,
193.962 * hs,
109.985 * ws,
201.901 * hs,
90 * ws,
201.901 * hs,
);
bgPath.cubicTo(
70.0151 * ws,
201.901 * hs,
50.8487 * ws,
193.962 * hs,
36.7172 * ws,
179.831 * hs,
);
bgPath.cubicTo(
22.5857 * ws,
165.699 * hs,
14.6467 * ws,
146.533 * hs,
14.6467 * ws,
126.548 * hs,
);
bgPath.cubicTo(
14.6467 * ws,
99.2889 * hs,
30.4521 * ws,
73.2261 * hs,
45.8995 * ws,
54.011 * hs,
);
bgPath.cubicTo(
56.9867 * ws,
40.3435 * hs,
69.3943 * ws,
27.7939 * hs,
82.9262 * ws,
16.5416 * hs,
);
bgPath.close();
Paint bgFill = Paint()..style = PaintingStyle.fill;
bgFill.color = context.theme.scaffoldBackgroundColor;
canvas.drawPath(bgPath, bgFill);
// Calculate the fuel level height
double fuelLevelHeight = 209 - (209 * value);
Path behindDrop = Path();
behindDrop.moveTo(170.377 * ws, fuelLevelHeight * hs);
behindDrop.cubicTo(
170.377 * ws,
173.014 * hs,
134.391 * ws,
209 * hs,
90 * ws,
209 * hs,
);
behindDrop.cubicTo(
45.6089 * ws,
209 * hs,
9.62317 * ws,
173.014 * hs,
9.62317 * ws,
fuelLevelHeight * hs,
);
behindDrop.cubicTo(
9.62317 * ws,
fuelLevelHeight * hs,
52.4908 * ws,
148.273 * hs,
90 * ws,
fuelLevelHeight * hs,
);
behindDrop.cubicTo(
132.868 * ws,
108.084 * hs,
170.377 * ws,
fuelLevelHeight * hs,
170.377 * ws,
fuelLevelHeight * hs,
);
behindDrop.close();
Paint behindDropFill = Paint()..style = PaintingStyle.fill;
behindDropFill.color = const Color(0xff0062E5).withOpacity(1.0);
canvas.drawPath(behindDrop, behindDropFill);
Path upperDrop = Path();
upperDrop.moveTo(9.62317 * ws, fuelLevelHeight * hs);
upperDrop.cubicTo(
9.62317 * ws,
173.014 * hs,
45.609 * ws,
209 * hs,
90 * ws,
209 * hs,
);
upperDrop.cubicTo(
134.391 * ws,
209 * hs,
170.377 * ws,
173.014 * hs,
170.377 * ws,
fuelLevelHeight * hs,
);
upperDrop.cubicTo(
170.377 * ws,
fuelLevelHeight * hs,
124.83 * ws,
148.271 * hs,
90 * ws,
fuelLevelHeight * hs,
);
upperDrop.cubicTo(
53.5869 * ws,
108.084 * hs,
9.62317 * ws,
fuelLevelHeight * hs,
9.62317 * ws,
fuelLevelHeight * hs,
);
upperDrop.close();
Paint upperDropFill = Paint()..style = PaintingStyle.fill;
upperDropFill.color = const Color(0xff2F88FF).withOpacity(1.0);
canvas.drawPath(upperDrop, upperDropFill);
Path borderPath = Path();
borderPath.moveTo(73.9955 * ws, 5.75999 * hs);
borderPath.lineTo(74.0161 * ws, 5.74307 * hs);
borderPath.cubicTo(
78.5154 * ws,
2.03053 * hs,
84.1668 * ws,
0,
90 * ws,
0,
);
borderPath.cubicTo(
95.8333 * ws,
0,
101.485 * ws,
2.03053 * hs,
105.984 * ws,
5.74307 * hs,
);
borderPath.lineTo(106.004 * ws, 5.75986 * hs);
borderPath.lineTo(106.025 * ws, 5.77673 * hs);
borderPath.cubicTo(
120.263 * ws,
17.6156 * hs,
133.308 * ws,
30.82 * hs,
144.973 * ws,
45.201 * hs,
);
borderPath.lineTo(144.992 * ws, 45.2235 * hs);
borderPath.lineTo(145.01 * ws, 45.2461 * hs);
borderPath.cubicTo(
160.937 * ws,
65.0484 * hs,
179.353 * ws,
94.3099 * hs,
179.353 * ws,
126.548 * hs,
);
borderPath.cubicTo(
179.353 * ws,
150.246 * hs,
169.939 * ws,
172.973 * hs,
153.182 * ws,
189.73 * hs,
);
borderPath.cubicTo(
136.425 * ws,
206.487 * hs,
113.698 * ws,
215.901 * hs,
90 * ws,
215.901 * hs,
);
borderPath.cubicTo(
66.302 * ws,
215.901 * hs,
43.5747 * ws,
206.487 * hs,
26.8177 * ws,
189.73 * hs,
);
borderPath.cubicTo(
10.0607 * ws,
172.973 * hs,
0.646729 * ws,
150.246 * hs,
0.646729 * ws,
126.548 * hs,
);
borderPath.cubicTo(
0.646729 * ws,
94.3101 * hs,
19.0631 * ws,
65.0486 * hs,
34.9882 * ws,
45.2392 * hs,
);
borderPath.lineTo(35.0076 * ws, 45.2152 * hs);
borderPath.lineTo(35.027 * ws, 45.1912 * hs);
borderPath.cubicTo(
46.6919 * ws,
30.8115 * hs,
59.7435 * ws,
17.611 * hs,
73.9751 * ws,
5.777 * hs,
);
borderPath.lineTo(73.9955 * ws, 5.75999 * hs);
borderPath.close();
borderPath.moveTo(97.0738 * ws, 16.5416 * hs);
borderPath.cubicTo(
95.0826 * ws,
14.8986 * hs,
92.5816 * ws,
14 * hs,
90 * ws,
14 * hs,
);
borderPath.cubicTo(
87.4185 * ws,
14 * hs,
84.9174 * ws,
14.8986 * hs,
82.9262 * ws,
16.5416 * hs,
);
borderPath.cubicTo(
69.3943 * ws,
27.7939 * hs,
56.9867 * ws,
40.3435 * hs,
45.8995 * ws,
54.011 * hs,
);
borderPath.cubicTo(
30.4521 * ws,
73.2261 * hs,
14.6467 * ws,
99.2889 * hs,
14.6467 * ws,
126.548 * hs,
);
borderPath.cubicTo(
14.6467 * ws,
146.533 * hs,
22.5857 * ws,
165.699 * hs,
36.7172 * ws,
179.831 * hs,
);
borderPath.cubicTo(
50.8487 * ws,
193.962 * hs,
70.0151 * ws,
201.901 * hs,
90 * ws,
201.901 * hs,
);
borderPath.cubicTo(
109.985 * ws,
201.901 * hs,
129.151 * ws,
193.962 * hs,
143.283 * ws,
179.831 * hs,
);
borderPath.cubicTo(
157.414 * ws,
165.699 * hs,
165.353 * ws,
146.533 * hs,
165.353 * ws,
126.548 * hs,
);
borderPath.cubicTo(
165.353 * ws,
99.2889 * hs,
149.548 * ws,
73.2261 * hs,
134.101 * ws,
54.0205 * hs,
);
borderPath.cubicTo(
123.011 * ws,
40.3491 * hs,
110.61 * ws,
27.7963 * hs,
97.0738 * ws,
16.5416 * hs,
);
borderPath.close();
Paint borderFill = Paint()..style = PaintingStyle.fill;
borderFill.color = context.theme.scaffoldBackgroundColor;
canvas.drawShadow(
borderPath,
context.theme.dividerColor.withOpacity(0.3),
15.0,
true,
);
canvas.drawPath(borderPath, borderFill);
}
@override
bool shouldRepaint(covariant CustomPainter oldDelegate) {
return true;
}
}