120 lines
4.5 KiB
TypeScript
120 lines
4.5 KiB
TypeScript
import React from "react";
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type StateArgs = {done?:boolean, open?:boolean};
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type StateObj = {done:boolean, open:boolean};
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type StateBinding = [state:StateObj, update:(args:StateArgs)=>void];
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const CTX = React.createContext([{done:true, open:false}, (args)=>{}] as StateBinding);
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export const Group =(props:{children:React.JSX.Element|React.JSX.Element[]})=>
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{
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const [stateGet, stateSet] = React.useState({done:true, open:false} as StateObj);
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return <CTX.Provider value={[stateGet, (args:StateArgs)=> stateSet({...stateGet, ...args})]}>{props.children}</CTX.Provider>;
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};
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export const Menu =(props:{children:React.JSX.Element|React.JSX.Element[]})=>
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{
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const [stateGet, stateSet] = React.useContext(CTX);
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const refElement:React.MutableRefObject<HTMLElement|null> = React.useRef( null );
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const refControl:React.MutableRefObject<CollapseControls|null> = React.useRef( null );
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const classDefault = "relative transition-all duration-700 border";
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const classOpen = "h-auto w-auto top-10 px-4 ";
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const classShut = "h-0 w-[300px] top-0 px-0";
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window.TwindInst(classDefault);
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window.TwindInst(classOpen);
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window.TwindInst(classShut);
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React.useEffect(()=>refControl.current = Collapser(refElement.current as HTMLElement, true), []);
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React.useEffect(()=> {refControl.current && refControl.current(stateGet.open, 1000, ()=>stateSet({done:true}))}, [stateGet.open])
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return <div class={classDefault} data-class={classDefault} data-class-open={classOpen} data-class-shut={classShut} ref={refElement as React.Ref<HTMLDivElement>}>{props.children}</div>;
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};
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export const Button =()=>
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{
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const [stateGet, stateSet] = React.useContext(CTX);
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return <>
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<p>{JSON.stringify(stateGet)}</p>
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<button class="px-10 py-2 bg-red-500 text-white" onClick={e=>stateSet({open:true, done:false})}>Open</button>
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<button class="px-10 py-2 bg-red-500 text-white" onClick={e=>stateSet({open:false, done:false})}>Close</button>
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</>;
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};
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type DoneCallback =(openState:boolean)=>void;
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export type CollapseControls =(inOpen?:boolean, inMs?:number, inDone?:DoneCallback)=>void;
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export function Collapser(inElement:HTMLElement, initialState = false)
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{
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let userDone:DoneCallback = (openState) => {};
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let userMode = initialState;
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let frameRequest = 0;
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const done = (inEvent:TransitionEvent)=>
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{
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if (inEvent.propertyName == "height" && inEvent.target == inElement)
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{
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inEvent.stopPropagation();
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if (userMode)
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{
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inElement.style.height = "auto";
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inElement.style.overflow = "visible";
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}
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userDone(userMode);
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}
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};
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inElement.addEventListener("transitionend", done);
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return function(inOpen, inMs, inDone)
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{
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cancelAnimationFrame(frameRequest);
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if(arguments.length)
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{
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userDone = inDone|| ((m)=>{}) as DoneCallback;
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userMode = inOpen === true;
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// 1) capture current state and possible classes
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const h1 = inElement.clientHeight;
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const w1 = inElement.clientWidth;
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const classesInitial = inElement.getAttribute("class");
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const classesStart = inElement.getAttribute("data-class");
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const classesEnd = inElement.getAttribute(`data-class-${inOpen?"open":"shut"}`);
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// 2) disable transitions to get immediate results
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inElement.style.transition = "none";
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inElement.style.height = "";
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inElement.style.width = "";
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// 3) add new classes and capture new height
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inElement.className = classesStart + " " + classesEnd;
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const h2 = inElement.clientHeight;
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const w2 = inElement.clientWidth;
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// 4) put everything back (and turn on overflow hidden)
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inElement.style.height = h1+"px";
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inElement.style.width = w1+"px";
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inElement.style.overflow = "hidden";
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inElement.className = classesInitial;
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console.log(`BEFORE classes:"${inElement.className}" width:"${w1}" height:"${h1}"`);
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frameRequest = requestAnimationFrame(()=>
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{
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inElement.style.transition = "";
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frameRequest = requestAnimationFrame(()=>
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{
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inElement.style.height = `${h2}px`;
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inElement.style.width = `${w2}px`;
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inElement.className = classesStart + " " + classesEnd;
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console.log(`AFTER classes:"${inElement.className}" width:"${w2}" height:"${h2}"`);
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});
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});
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}
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else
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{
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inElement.removeEventListener("transitionend", done);
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}
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} as CollapseControls;
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} |