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import { observer } from "mobx-react";
import { action, computed } from "mobx";
import { InkingControl } from "./InkingControl";
import React = require("react");
import { Transform } from "../util/Transform";
import { Document } from "../../fields/Document";
import { KeyStore } from "../../fields/KeyStore";
import { InkField, InkTool, StrokeData, StrokeMap } from "../../fields/InkField";
import { JsxArgs } from "./nodes/DocumentView";
import { InkingStroke } from "./InkingStroke";
import "./InkingCanvas.scss"
import { CollectionDockingView } from "./collections/CollectionDockingView";
import { Utils } from "../../Utils";
import { FieldWaiting } from "../../fields/Field";
import { getMapLikeKeys } from "mobx/lib/internal";
interface InkCanvasProps {
getScreenTransform: () => Transform;
Document: Document;
}
@observer
export class InkingCanvas extends React.Component<InkCanvasProps> {
private _isDrawing: boolean = false;
private _idGenerator: string = "";
constructor(props: Readonly<InkCanvasProps>) {
super(props);
}
@computed
get inkData(): StrokeMap {
let map = this.props.Document.GetT(KeyStore.Ink, InkField);
if (!map || map === FieldWaiting) {
return new Map;
}
return new Map(map.Data);
}
set inkData(value: StrokeMap) {
this.props.Document.SetData(KeyStore.Ink, value, InkField);
}
componentDidMount() {
document.addEventListener("mouseup", this.handleMouseUp);
}
componentWillUnmount() {
document.removeEventListener("mouseup", this.handleMouseUp);
}
@action
handleMouseDown = (e: React.PointerEvent): void => {
if (e.button != 0 ||
InkingControl.Instance.selectedTool === InkTool.None) {
return;
}
e.stopPropagation()
if (InkingControl.Instance.selectedTool === InkTool.Eraser) {
return
}
e.stopPropagation()
const point = this.relativeCoordinatesForEvent(e);
// start the new line, saves a uuid to represent the field of the stroke
this._idGenerator = Utils.GenerateGuid();
let data = this.inkData;
data.set(this._idGenerator,
{
pathData: [point],
color: InkingControl.Instance.selectedColor,
width: InkingControl.Instance.selectedWidth,
tool: InkingControl.Instance.selectedTool,
page: this.props.Document.GetNumber(KeyStore.CurPage, 0)
});
this.inkData = data;
this._isDrawing = true;
}
@action
handleMouseMove = (e: React.PointerEvent): void => {
if (!this._isDrawing ||
InkingControl.Instance.selectedTool === InkTool.None) {
return;
}
e.stopPropagation()
if (InkingControl.Instance.selectedTool === InkTool.Eraser) {
return
}
const point = this.relativeCoordinatesForEvent(e);
// add points to new line as it is being drawn
let data = this.inkData;
let strokeData = data.get(this._idGenerator);
if (strokeData) {
strokeData.pathData.push(point);
data.set(this._idGenerator, strokeData);
}
this.inkData = data;
}
@action
handleMouseUp = (e: MouseEvent): void => {
this._isDrawing = false;
}
relativeCoordinatesForEvent = (e: React.MouseEvent): { x: number, y: number } => {
let [x, y] = this.props.getScreenTransform().transformPoint(e.clientX, e.clientY);
x += 50000
y += 50000
return { x, y };
}
@action
removeLine = (id: string): void => {
let data = this.inkData;
data.delete(id);
this.inkData = data;
}
render() {
// styling for cursor
let canvasStyle = {};
if (InkingControl.Instance.selectedTool === InkTool.None) {
canvasStyle = { pointerEvents: "none" };
} else {
canvasStyle = { pointerEvents: "auto", cursor: "crosshair" };
}
// get data from server
// let inkField = this.props.Document.GetT(KeyStore.Ink, InkField);
// if (!inkField || inkField == "<Waiting>") {
// return (<div className="inking-canvas" style={canvasStyle}
// onMouseDown={this.handleMouseDown} onMouseMove={this.handleMouseMove} >
// <svg>
// </svg>
// </div >)
// }
let lines = this.inkData;
// parse data from server
let paths: Array<JSX.Element> = []
let curPage = this.props.Document.GetNumber(KeyStore.CurPage, 0)
Array.from(lines).map(item => {
let id = item[0];
let strokeData = item[1];
if (strokeData.page == 0 || strokeData.page == curPage)
paths.push(<InkingStroke key={id} id={id}
line={strokeData.pathData}
color={strokeData.color}
width={strokeData.width}
tool={strokeData.tool}
deleteCallback={this.removeLine} />)
})
return (
<div className="inking-canvas" style={canvasStyle}
onPointerDown={this.handleMouseDown} onPointerMove={this.handleMouseMove} >
<svg>
{paths}
</svg>
</div >
)
}
}
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