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import React = require("react");
import { observable, action } from "mobx";
import { observer } from "mobx-react";
import { InkStrokeProperties } from "./InkStrokeProperties";
import { setupMoveUpEvents, emptyFunction } from "../../Utils";
import { UndoManager } from "../util/UndoManager";
import { ControlPoint, InkData, PointData } from "../../fields/InkField";
import { Transform } from "../util/Transform";
import { Colors } from "./global/globalEnums";
import { Doc } from "../../fields/Doc";
import { listSpec } from "../../fields/Schema";
import { Cast } from "../../fields/Types";
export interface InkControlProps {
inkDoc: Doc;
data: InkData;
addedPoints: PointData[];
format: number[];
ScreenToLocalTransform: () => Transform;
}
@observer
export class InkControls extends React.Component<InkControlProps> {
@observable private _overControl = -1;
@observable private _overAddPoint = -1;
/**
* Handles the movement of a selected control point when the user clicks and drags.
* @param controlIndex The index of the currently selected control point.
*/
@action
onControlDown = (e: React.PointerEvent, controlIndex: number): void => {
if (InkStrokeProperties.Instance) {
InkStrokeProperties.Instance.moveControl(0, 0, 1);
const controlUndo = UndoManager.StartBatch("DocDecs set radius");
const screenScale = this.props.ScreenToLocalTransform().Scale;
const order = controlIndex % 4;
const handleIndexA = order === 2 ? controlIndex - 1 : controlIndex - 2;
const handleIndexB = order === 2 ? controlIndex + 2 : controlIndex + 1;
const brokenIndices = Cast(this.props.inkDoc.brokenInkIndices, listSpec("number"));
setupMoveUpEvents(this, e,
(e: PointerEvent, down: number[], delta: number[]) => {
InkStrokeProperties.Instance?.moveControl(-delta[0] * screenScale, -delta[1] * screenScale, controlIndex);
return false;
},
() => controlUndo?.end(),
action((e: PointerEvent, doubleTap: boolean | undefined) => {
if (doubleTap && brokenIndices && brokenIndices.includes(controlIndex)) {
InkStrokeProperties.Instance?.snapHandleTangent(controlIndex, handleIndexA, handleIndexB);
}
}));
}
}
/**
* Deletes the currently selected point.
*/
@action
onDelete = (e: KeyboardEvent) => {
if (["-", "Backspace", "Delete"].includes(e.key)) {
if (InkStrokeProperties.Instance?.deletePoints()) e.stopPropagation();
}
}
/**
* Changes the current selected control point.
*/
@action
changeCurrPoint = (i: number) => {
if (InkStrokeProperties.Instance) {
InkStrokeProperties.Instance._currentPoint = i;
document.addEventListener("keydown", this.onDelete, true);
}
}
/**
* Updates whether a user has hovered over a particular control point or point that could be added
* on click.
*/
@action onEnterControl = (i: number) => { this._overControl = i; };
@action onLeaveControl = () => { this._overControl = -1; };
@action onEnterAddPoint = (i: number) => { this._overAddPoint = i; };
@action onLeaveAddPoint = () => { this._overAddPoint = -1; };
render() {
const formatInstance = InkStrokeProperties.Instance;
if (!formatInstance) return (null);
// Accessing the current ink's data and extracting all control points.
const data = this.props.data;
const controlPoints: ControlPoint[] = [];
if (data.length >= 4) {
for (let i = 0; i <= data.length - 4; i += 4) {
controlPoints.push({ X: data[i].X, Y: data[i].Y, I: i });
controlPoints.push({ X: data[i + 3].X, Y: data[i + 3].Y, I: i + 3 });
}
}
const addedPoints = this.props.addedPoints;
const [left, top, scaleX, scaleY, strokeWidth] = this.props.format;
return (
<>
{addedPoints.map((pts, i) =>
<svg height="10" width="10" key={`add${i}`}>
<circle
cx={(pts.X - left - strokeWidth / 2) * scaleX + strokeWidth / 2}
cy={(pts.Y - top - strokeWidth / 2) * scaleY + strokeWidth / 2}
r={strokeWidth / 1.5}
stroke={this._overAddPoint === i ? Colors.MEDIUM_BLUE : "transparent"}
strokeWidth={0} fill={this._overAddPoint === i ? Colors.MEDIUM_BLUE : "transparent"}
onPointerDown={() => { formatInstance?.addPoints(pts.X, pts.Y, addedPoints, i, controlPoints); }}
onMouseEnter={() => this.onEnterAddPoint(i)}
onMouseLeave={this.onLeaveAddPoint}
pointerEvents="all"
cursor="all-scroll"
/>
</svg>
)}
{controlPoints.map((control, i) =>
<svg height="10" width="10" key={`ctrl${i}`}>
<rect
x={(control.X - left - strokeWidth / 2) * scaleX}
y={(control.Y - top - strokeWidth / 2) * scaleY}
height={this._overControl === i ? strokeWidth * 1.5 : strokeWidth}
width={this._overControl === i ? strokeWidth * 1.5 : strokeWidth}
strokeWidth={strokeWidth / 6} stroke={Colors.MEDIUM_BLUE}
fill={formatInstance?._currentPoint === control.I ? Colors.MEDIUM_BLUE : Colors.WHITE}
onPointerDown={(e) => {
this.changeCurrPoint(control.I);
this.onControlDown(e, control.I);
}}
onMouseEnter={() => this.onEnterControl(i)}
onMouseLeave={this.onLeaveControl}
pointerEvents="all"
cursor="default"
/>
</svg>
)}
</>
);
}
}
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