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Reziable Text in Konva
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import React, { useRef, useEffect } from "react"; | |
import { Text, Transformer } from "react-konva"; | |
export function ResizableText({ | |
x, | |
y, | |
text, | |
isSelected, | |
width, | |
onResize, | |
onClick, | |
onDoubleClick | |
}) { | |
const textRef = useRef(null); | |
const transformerRef = useRef(null); | |
useEffect(() => { | |
if (isSelected && transformerRef.current !== null) { | |
transformerRef.current.nodes([textRef.current]); | |
transformerRef.current.getLayer().batchDraw(); | |
} | |
}, [isSelected]); | |
function handleResize() { | |
if (textRef.current !== null) { | |
const textNode = textRef.current; | |
const newWidth = textNode.width() * textNode.scaleX(); | |
const newHeight = textNode.height() * textNode.scaleY(); | |
textNode.setAttrs({ | |
width: newWidth, | |
scaleX: 1 | |
}); | |
onResize(newWidth, newHeight); | |
} | |
} | |
const transformer = isSelected ? ( | |
<Transformer | |
ref={transformerRef} | |
rotateEnabled={false} | |
flipEnabled={false} | |
enabledAnchors={["middle-left", "middle-right"]} | |
boundBoxFunc={(oldBox, newBox) => { | |
newBox.width = Math.max(30, newBox.width); | |
return newBox; | |
}} | |
/> | |
) : null; | |
return ( | |
<> | |
<Text | |
x={x} | |
y={y} | |
ref={textRef} | |
text={text} | |
fill="black" | |
fontFamily="sans-serif" | |
fontSize={16} | |
perfectDrawEnabled={false} | |
onTransform={handleResize} | |
onClick={onClick} | |
onTap={onClick} | |
onDblClick={onDoubleClick} | |
onDblTap={onDoubleClick} | |
width={width} | |
/> | |
{transformer} | |
</> | |
); | |
} |
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