使用React和Konva的自适应画布 [英] Responsive canvas with React and Konva
本文介绍了使用React和Konva的自适应画布的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我使用React和Konva库画一条简单的线.但是,当我调整屏幕大小时,该行不在屏幕外.那么,如何使它具有响应能力?
I use React and Konva libraries to draw a simple line. But when i resize the screen, the line stays out of the screen. So, how can I make it responsive?
这是我的代码:
import React from "react";
import { Stage, Layer,Line } from 'react-konva';
class App extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<Stage width={window.innerWidth} height={window.innerHeight}>
<Layer>
<Line
x={100}
y={100}
points={[0,0,576,456,509,403,20,15,300,207,111,222,293,177]}
stroke="black"
strokeWidth={5}
ref="line"
/>
</Layer>
</Stage>
</div>
);
}
}
export default App;
推荐答案
响应逻辑"实际上取决于您的应用和所需的UI目标.您可以在此处添加响应的最简单方法是使用缩放:
The "responsive logic" really depends on your app and on your desired UI goals. The simplest way you can add responsive here is to use scaling:
import React from "react";
import { Stage, Layer,Line } from 'react-konva';
class App extends React.Component {
constructor(props) {
super(props);
}
render() {
// lets think you want to make all your objects visible in
// 700x700 scene
const CANVAS_VIRTUAL_WIDTH = 700;
const CANVAS_VIRTUAL_HEIGHT = 700;
// now you may want to make it visible even on small screens
// we can just scale it
const scale = Math.min(
window.innerWidth / CANVAS_VIRTUAL_WIDTH,
window.innerHeight / CANVAS_VIRTUAL_HEIGHT
);
return (
<div>
<Stage width={window.innerWidth} height={window.innerHeight} scaleX={scale} scaleY={scale}>
<Layer>
<Line
x={100}
y={100}
points={[0,0,576,456,509,403,20,15,300,207,111,222,293,177]}
stroke="black"
strokeWidth={5}
ref="line"
/>
</Layer>
</Stage>
</div>
);
}
}
export default App;
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