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import {createContext, useState} from 'react' | |
import {Element, Rectangle} from './components/Rectangle/Rectangle' | |
import {PageContainer} from './PageContainer' | |
import {Toolbar} from './Toolbar' | |
type ElementsContextType = { | |
elements: Element[] | |
addElement: () => void | |
setElement: SetElement | |
} | |
export const ElementsContext = createContext<ElementsContextType>({ | |
elements: [], | |
addElement: () => {}, | |
setElement: () => {}, | |
}) | |
type SelectedElementContextType = { | |
selectedElement: number | null | |
setSelectedElement: (index: number) => void | |
} | |
export const SelectedElementContext = createContext<SelectedElementContextType>({ | |
selectedElement: null, | |
setSelectedElement: () => {}, | |
}) | |
export type SetElement = (indexToSet: number, newElement: Element) => void | |
function Canvas() { | |
const [elements, setElements] = useState<Element[]>([]) | |
const [selectedElement, setSelectedElement] = useState<number | null>(null) | |
const setElement: SetElement = (indexToSet, newElement) => { | |
setElements( | |
elements.map((element, index) => { | |
if (indexToSet === index) return newElement | |
return element | |
}), | |
) | |
} | |
const addElement = () => { | |
setElements((elements) => { | |
return [ | |
...elements, | |
{ | |
style: { | |
position: {top: 100 + elements.length * 30, left: 100 + elements.length * 30}, | |
size: {width: 100, height: 100}, | |
}, | |
}, | |
] | |
}) | |
} | |
return ( | |
<SelectedElementContext.Provider value={{selectedElement, setSelectedElement}}> | |
<ElementsContext.Provider value={{elements, addElement, setElement}}> | |
<PageContainer | |
onClick={() => { | |
setSelectedElement(null) | |
}} | |
> | |
<Toolbar /> | |
{elements.map((element, index) => ( | |
<Rectangle key={index} element={element} index={index} /> | |
))} | |
</PageContainer> | |
</ElementsContext.Provider> | |
</SelectedElementContext.Provider> | |
) | |
} | |
export default Canvas |
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import {useContext} from 'react' | |
import {ElementsContext, SelectedElementContext} from '../../Canvas' | |
import {Drag} from '../Drag' | |
import {RectangleContainer} from './RectangleContainer' | |
import {RectangleInner} from './RectangleInner' | |
export type ElementStyle = { | |
position: {top: number; left: number} | |
size: {width: number; height: number} | |
} | |
export type Element = {style: ElementStyle} | |
export const Rectangle = ({element, index}: {element: Element; index: number}) => { | |
const {selectedElement, setSelectedElement} = useContext(SelectedElementContext) | |
const {setElement} = useContext(ElementsContext) | |
return ( | |
<Drag | |
position={element.style.position} | |
onDrag={(position) => { | |
setElement(index, { | |
style: { | |
...element.style, | |
position, | |
}, | |
}) | |
}} | |
> | |
<div> | |
<RectangleContainer | |
position={element.style.position} | |
size={element.style.size} | |
onSelect={() => { | |
setSelectedElement(index) | |
}} | |
> | |
<RectangleInner selected={index === selectedElement} /> | |
</RectangleContainer> | |
</div> | |
</Drag> | |
) | |
} |
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import {Icon, IconButton, VStack} from '@chakra-ui/react' | |
import {useContext} from 'react' | |
import {Square} from 'react-feather' | |
import {ElementsContext} from './Canvas' | |
export const Toolbar = () => { | |
const {addElement} = useContext(ElementsContext) | |
return ( | |
<VStack | |
position="absolute" | |
top="20px" | |
left="20px" | |
backgroundColor="white" | |
padding={2} | |
boxShadow="md" | |
borderRadius="md" | |
spacing={2} | |
> | |
<IconButton | |
onClick={addElement} | |
aria-label="Add rectangle" | |
icon={<Icon style={{width: 24, height: 24}} as={Square} />} | |
/> | |
</VStack> | |
) | |
} |
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thank you very much jackes for this help , really appreciate it !