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Resizing a canvas in RN and drawing on the new canvas
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import React, {Component} from 'react'; | |
import {View, StyleSheet, Button} from 'react-native'; | |
import Canvas, {Path2D} from 'react-native-canvas'; | |
export default class App extends Component { | |
handlePath = (canvas) => { | |
if (!canvas) { | |
return; | |
} | |
canvas.width = 100; | |
canvas.height = 150; | |
const context = canvas.getContext('2d'); | |
context.fillStyle = 'red'; | |
context.fillRect(0, 0, 500, 500); | |
this.setState({ | |
canvas | |
}); | |
console.log(canvas) | |
} | |
resize = (args) => { | |
const { canvas } = this.state; | |
canvas.width = 300; | |
canvas.height = 400; | |
const context = canvas.getContext('2d'); | |
context.fillStyle = 'red'; | |
context.fillRect(0, 0, 500, 500); | |
console.log(canvas) | |
this.setState({ | |
canvas | |
}) | |
} | |
render() { | |
return ( | |
<View style={styles.container}> | |
<Canvas ref={this.handlePath} style={styles.canvas} /> | |
<Button title="resize" onPress={this.resize} /> | |
</View> | |
); | |
} | |
} | |
const styles = StyleSheet.create({ | |
container: { | |
position: 'absolute', | |
top: 0, | |
left: 0, | |
width: '100%', | |
height: '100%', | |
borderWidth: 3, | |
borderColor: 'green' | |
}, | |
canvas: { | |
borderWidth: 3, | |
borderColor: 'red', | |
width: 500, | |
height: 500 | |
} | |
}); |
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