98 lines
2.3 KiB
TypeScript
98 lines
2.3 KiB
TypeScript
import react, { useCallback, useState } from 'react';
|
|
|
|
import _ from 'lodash';
|
|
|
|
import { Point } from './viewport';
|
|
|
|
interface MouseHandlerProps {
|
|
updateShift: (shiftDelta: Point) => void;
|
|
updateZoom: (zoomFactor: number, center: Point) => void;
|
|
children: any;
|
|
}
|
|
|
|
const MouseHandler: react.FC<MouseHandlerProps> = (
|
|
props: MouseHandlerProps
|
|
) => {
|
|
const initialMouseState = {
|
|
down: false,
|
|
starting: { x: -1, y: -1 },
|
|
};
|
|
|
|
const [mouseState, setMouseState] = useState(initialMouseState);
|
|
|
|
console.log('MouseHandler, mouseState: ' + JSON.stringify(mouseState));
|
|
|
|
const genericHandler = (event: any) => {
|
|
console.log('Log - Event: ' + event.type);
|
|
if (event.pageX !== undefined) {
|
|
console.log(`Mouse : ${event.pageX}, ${event.pageY}`);
|
|
console.log('mouseState: ' + JSON.stringify(mouseState));
|
|
return;
|
|
}
|
|
};
|
|
|
|
const mouseLeaveHandler = (event: any) => {
|
|
genericHandler(event);
|
|
throtteledMouseMoveHandler.cancel();
|
|
setMouseState(initialMouseState);
|
|
};
|
|
|
|
const mouseDownHandler = (event: any) => {
|
|
event.preventDefault();
|
|
genericHandler(event);
|
|
setMouseState({
|
|
down: true,
|
|
starting: { x: event.pageX, y: event.pageY },
|
|
});
|
|
};
|
|
|
|
const mouseUpHandler = (event: any) => {
|
|
genericHandler(event);
|
|
event.preventDefault();
|
|
setMouseState(initialMouseState);
|
|
};
|
|
|
|
const mouseMoveHandler = (event: any) => {
|
|
event.preventDefault();
|
|
if (mouseState.down) {
|
|
genericHandler(event);
|
|
props.updateShift({
|
|
x: event.pageX - mouseState.starting.x,
|
|
y: event.pageY - mouseState.starting.y,
|
|
});
|
|
setMouseState({
|
|
down: true,
|
|
starting: {
|
|
x: event.pageX,
|
|
y: event.pageY,
|
|
},
|
|
});
|
|
}
|
|
};
|
|
|
|
const throtteledMouseMoveHandler = useCallback(
|
|
_.throttle(mouseMoveHandler, 50),
|
|
[mouseState.down]
|
|
);
|
|
|
|
const doubleClickHandler = (event: any) => {
|
|
genericHandler(event);
|
|
props.updateZoom(2, { x: event.pageX, y: event.pageY });
|
|
};
|
|
|
|
return (
|
|
<div
|
|
className='viewport mouse-handler'
|
|
onMouseDown={mouseDownHandler}
|
|
onMouseMove={throtteledMouseMoveHandler}
|
|
onMouseUp={mouseUpHandler}
|
|
onMouseLeave={mouseLeaveHandler}
|
|
onDoubleClick={doubleClickHandler}
|
|
>
|
|
{props.children}
|
|
</div>
|
|
);
|
|
};
|
|
|
|
export default MouseHandler;
|