diff options
Diffstat (limited to 'src/client/util/InteractionUtils.ts')
| -rw-r--r-- | src/client/util/InteractionUtils.ts | 153 |
1 files changed, 86 insertions, 67 deletions
diff --git a/src/client/util/InteractionUtils.ts b/src/client/util/InteractionUtils.ts index e58635a6f..d5799c21f 100644 --- a/src/client/util/InteractionUtils.ts +++ b/src/client/util/InteractionUtils.ts @@ -1,9 +1,23 @@ export namespace InteractionUtils { - export const MOUSE = "mouse"; - export const TOUCH = "touch"; + export const MOUSETYPE = "mouse"; + export const TOUCHTYPE = "touch"; + export const PENTYPE = "pen"; + export const ERASERTYPE = "eraser"; + + const POINTER_PEN_BUTTON = -1; + const REACT_POINTER_PEN_BUTTON = 0; + const ERASER_BUTTON = 5; export function IsType(e: PointerEvent | React.PointerEvent, type: string): boolean { - return e.pointerType === type; + switch (type) { + // pen and eraser are both pointer type 'pen', but pen is button 0 and eraser is button 5. -syip2 + case PENTYPE: + return e.pointerType === PENTYPE && e.button === (e instanceof PointerEvent ? POINTER_PEN_BUTTON : REACT_POINTER_PEN_BUTTON); + case ERASERTYPE: + return e.pointerType === PENTYPE && e.button === (e instanceof PointerEvent ? ERASER_BUTTON : ERASER_BUTTON); + default: + return e.pointerType === type; + } } export function TwoPointEuclidist(pt1: React.Touch, pt2: React.Touch): number { @@ -42,70 +56,75 @@ export namespace InteractionUtils { return 0; } - /** - * Returns the type of Touch Interaction from a list of points. - * Also returns any data that is associated with a Touch Interaction - * @param pts - List of points - */ - // export function InterpretPointers(pts: React.Touch[]): { type: Opt<TouchInteraction>, data?: any } { - // const leniency = 200; - // switch (pts.length) { - // case 1: - // return { type: OneFinger }; - // case 2: - // return { type: TwoSeperateFingers }; - // case 3: - // let pt1 = pts[0]; - // let pt2 = pts[1]; - // let pt3 = pts[2]; - // if (pt1 && pt2 && pt3) { - // let dist12 = TwoPointEuclidist(pt1, pt2); - // let dist23 = TwoPointEuclidist(pt2, pt3); - // let dist13 = TwoPointEuclidist(pt1, pt3); - // console.log(`distances: ${dist12}, ${dist23}, ${dist13}`); - // let dist12close = dist12 < leniency; - // let dist23close = dist23 < leniency; - // let dist13close = dist13 < leniency; - // let xor2313 = dist23close ? !dist13close : dist13close; - // let xor = dist12close ? !xor2313 : xor2313; - // // three input xor because javascript doesn't have logical xor's - // if (xor) { - // let points: number[] = []; - // let min = Math.min(dist12, dist23, dist13); - // switch (min) { - // case dist12: - // points = [0, 1, 2]; - // break; - // case dist23: - // points = [1, 2, 0]; - // break; - // case dist13: - // points = [0, 2, 1]; - // break; - // } - // return { type: TwoToOneFingers, data: points }; - // } - // else { - // return { type: ThreeSeperateFingers, data: null }; - // } - // } - // default: - // return { type: undefined }; - // } - // } + // These might not be very useful anymore, but I'll leave them here for now -syip2 + { - export function IsDragging(oldTouches: Map<number, React.Touch>, newTouches: TouchList, leniency: number): boolean { - for (let i = 0; i < newTouches.length; i++) { - let touch = newTouches.item(i); - if (touch) { - let oldTouch = oldTouches.get(touch.identifier); - if (oldTouch) { - if (TwoPointEuclidist(touch, oldTouch) >= leniency) { - return true; - } - } - } - } - return false; + + /** + * Returns the type of Touch Interaction from a list of points. + * Also returns any data that is associated with a Touch Interaction + * @param pts - List of points + */ + // export function InterpretPointers(pts: React.Touch[]): { type: Opt<TouchInteraction>, data?: any } { + // const leniency = 200; + // switch (pts.length) { + // case 1: + // return { type: OneFinger }; + // case 2: + // return { type: TwoSeperateFingers }; + // case 3: + // let pt1 = pts[0]; + // let pt2 = pts[1]; + // let pt3 = pts[2]; + // if (pt1 && pt2 && pt3) { + // let dist12 = TwoPointEuclidist(pt1, pt2); + // let dist23 = TwoPointEuclidist(pt2, pt3); + // let dist13 = TwoPointEuclidist(pt1, pt3); + // console.log(`distances: ${dist12}, ${dist23}, ${dist13}`); + // let dist12close = dist12 < leniency; + // let dist23close = dist23 < leniency; + // let dist13close = dist13 < leniency; + // let xor2313 = dist23close ? !dist13close : dist13close; + // let xor = dist12close ? !xor2313 : xor2313; + // // three input xor because javascript doesn't have logical xor's + // if (xor) { + // let points: number[] = []; + // let min = Math.min(dist12, dist23, dist13); + // switch (min) { + // case dist12: + // points = [0, 1, 2]; + // break; + // case dist23: + // points = [1, 2, 0]; + // break; + // case dist13: + // points = [0, 2, 1]; + // break; + // } + // return { type: TwoToOneFingers, data: points }; + // } + // else { + // return { type: ThreeSeperateFingers, data: null }; + // } + // } + // default: + // return { type: undefined }; + // } + // } + + // export function IsDragging(oldTouches: Map<number, React.Touch>, newTouches: TouchList, leniency: number): boolean { + // for (let i = 0; i < newTouches.length; i++) { + // let touch = newTouches.item(i); + // if (touch) { + // let oldTouch = oldTouches.get(touch.identifier); + // if (oldTouch) { + // if (TwoPointEuclidist(touch, oldTouch) >= leniency) { + // return true; + // } + // } + // } + // } + // return false; + // } } }
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