smig/excalidraw
1
0
Fork 0
mirror of https://github.com/excalidraw/excalidraw.git synced 2025-04-14 16:40:58 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fixed Unable to preventDefault errors in Chrome (#130)

Browse source 
* Fixed Unable to preventDefault errors in Chrome

* Cleanup wheel event listener
This commit is contained in:
Timur Khazamov 2020-01-05 01:11:23 +05:00 • committed by Christopher Chedeau
parent 34b8883739
commit aa01be2dbe
1 changed files with 24 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
src/index.tsx
View file

@ -940,6 +940,8 @@ class App extends React.Component<{}, AppState> {
this.forceUpdate();
};
private removeWheelEventListener: (() => void) | undefined;
public render() {
return (
<div
@ -1110,13 +1112,18 @@ class App extends React.Component<{}, AppState> {
id="canvas"
width={window.innerWidth - CANVAS_WINDOW_OFFSET_LEFT}
height={window.innerHeight - CANVAS_WINDOW_OFFSET_TOP}
onWheel={e => {
e.preventDefault();
const { deltaX, deltaY } = e;
this.setState(state => ({
scrollX: state.scrollX - deltaX,
scrollY: state.scrollY - deltaY
}));
ref={canvas => {
if (this.removeWheelEventListener) {
this.removeWheelEventListener();
this.removeWheelEventListener = undefined;
}
if (canvas) {
canvas.addEventListener("wheel", this.handleWheel, {
passive: false
});
this.removeWheelEventListener = () =>
canvas.removeEventListener("wheel", this.handleWheel);
}
}}
onMouseDown={e => {
// only handle left mouse button
@ -1394,6 +1401,15 @@ class App extends React.Component<{}, AppState> {
);
}
private handleWheel = (e: WheelEvent) => {
e.preventDefault();
const { deltaX, deltaY } = e;
this.setState(state => ({
scrollX: state.scrollX - deltaX,
scrollY: state.scrollY - deltaY
}));
};
componentDidUpdate() {
renderScene(rc, context, {
scrollX: this.state.scrollX,