33 lines
976 B
Dart
33 lines
976 B
Dart
import 'package:flutter/material.dart';
|
|
import './render.dart';
|
|
|
|
/// Abstract definition for a [LazyCanvas] background.
|
|
abstract class CanvasBackground {
|
|
/// the fill color of background
|
|
final Color bgColor;
|
|
const CanvasBackground({this.bgColor = Colors.white});
|
|
|
|
/// draw the backround on this context. Implement this to have
|
|
/// different kinds of backgrounds
|
|
void paint(Canvas canvas, Size canvasSize, double scale);
|
|
}
|
|
|
|
class NoBackground extends CanvasBackground {
|
|
const NoBackground();
|
|
|
|
@override
|
|
void paint(Canvas canvas, Size canvasSize, double scale) {}
|
|
}
|
|
|
|
class SingleColorBackround extends CanvasBackground {
|
|
const SingleColorBackround(Color backgroundColor) : super(bgColor: backgroundColor);
|
|
|
|
@override
|
|
void paint(Canvas canvas, Size canvasSize, double scale) {
|
|
final paint = Paint()
|
|
..color = bgColor
|
|
..style = PaintingStyle.fill;
|
|
canvas.drawRect(Rect.fromLTWH(0, 0, canvasSize.width, canvasSize.height), paint);
|
|
}
|
|
}
|