1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
import { action, computed, trace, observable, runInAction } from "mobx";
import { observer } from "mobx-react";
import { Document } from "../../fields/Document";
import { FieldWaiting } from "../../fields/Field";
import { InkField, InkTool, StrokeData, StrokeMap } from "../../fields/InkField";
import { KeyStore } from "../../fields/KeyStore";
import { Utils } from "../../Utils";
import { Transform } from "../util/Transform";
import "./InkingCanvas.scss";
import { InkingControl } from "./InkingControl";
import { InkingStroke } from "./InkingStroke";
import React = require("react");
interface InkCanvasProps {
getScreenTransform: () => Transform;
Document: Document;
children: () => JSX.Element[];
}
@observer
export class InkingCanvas extends React.Component<InkCanvasProps> {
maxCanvasDim = 8192 / 2; // 1/2 of the maximum canvas dimension for Chrome
@observable inkMidX: number = 0;
@observable inkMidY: number = 0;
private _currentStrokeId: string = "";
public static IntersectStrokeRect(stroke: StrokeData, selRect: { left: number, top: number, width: number, height: number }): boolean {
return stroke.pathData.reduce((inside: boolean, val) => inside ||
(selRect.left < val.x && selRect.left + selRect.width > val.x &&
selRect.top < val.y && selRect.top + selRect.height > val.y)
, false);
}
componentDidMount() {
this.props.Document.GetTAsync(KeyStore.Ink, InkField, ink => runInAction(() => {
if (ink) {
let bounds = Array.from(ink.Data).reduce(([mix, max, miy, may], [id, strokeData]) =>
strokeData.pathData.reduce(([mix, max, miy, may], p) =>
[Math.min(mix, p.x), Math.max(max, p.x), Math.min(miy, p.y), Math.max(may, p.y)],
[mix, max, miy, may]),
[Number.MAX_VALUE, Number.MIN_VALUE, Number.MAX_VALUE, Number.MIN_VALUE]);
this.inkMidX = (bounds[0] + bounds[1]) / 2;
this.inkMidY = (bounds[2] + bounds[3]) / 2;
}
}));
}
@computed
get inkData(): StrokeMap {
let map = this.props.Document.GetT(KeyStore.Ink, InkField);
return !map || map === FieldWaiting ? new Map : new Map(map.Data);
}
set inkData(value: StrokeMap) {
this.props.Document.SetDataOnPrototype(KeyStore.Ink, value, InkField);
}
@action
onPointerDown = (e: React.PointerEvent): void => {
if (e.button != 0 || e.altKey || e.ctrlKey || InkingControl.Instance.selectedTool === InkTool.None) {
return;
}
document.addEventListener("pointermove", this.onPointerMove, true);
document.addEventListener("pointerup", this.onPointerUp, true);
e.stopPropagation();
e.preventDefault();
if (InkingControl.Instance.selectedTool != InkTool.Eraser) {
// start the new line, saves a uuid to represent the field of the stroke
this._currentStrokeId = Utils.GenerateGuid();
this.inkData.set(this._currentStrokeId, {
pathData: [this.relativeCoordinatesForEvent(e.clientX, e.clientY)],
color: InkingControl.Instance.selectedColor,
width: InkingControl.Instance.selectedWidth,
tool: InkingControl.Instance.selectedTool,
page: this.props.Document.GetNumber(KeyStore.CurPage, -1)
});
}
}
@action
onPointerUp = (e: PointerEvent): void => {
document.removeEventListener("pointermove", this.onPointerMove, true);
document.removeEventListener("pointerup", this.onPointerUp, true);
let coord = this.relativeCoordinatesForEvent(e.clientX, e.clientY);
if (Math.abs(coord.x - this.inkMidX) > 500 || Math.abs(coord.y - this.inkMidY) > 500) {
this.inkMidX = coord.x;
this.inkMidY = coord.y;
}
e.stopPropagation();
e.preventDefault();
}
@action
onPointerMove = (e: PointerEvent): void => {
e.stopPropagation()
e.preventDefault();
if (InkingControl.Instance.selectedTool != InkTool.Eraser) {
let data = this.inkData; // add points to new line as it is being drawn
let strokeData = data.get(this._currentStrokeId);
if (strokeData) {
strokeData.pathData.push(this.relativeCoordinatesForEvent(e.clientX, e.clientY));
data.set(this._currentStrokeId, strokeData);
}
this.inkData = data;
}
}
relativeCoordinatesForEvent = (ex: number, ey: number): { x: number, y: number } => {
let [x, y] = this.props.getScreenTransform().transformPoint(ex, ey);
return { x, y };
}
@action
removeLine = (id: string): void => {
let data = this.inkData;
data.delete(id);
this.inkData = data;
}
@computed
get drawnPaths() {
let curPage = this.props.Document.GetNumber(KeyStore.CurPage, -1)
let paths = Array.from(this.inkData).reduce((paths, [id, strokeData]) => {
if (strokeData.page == -1 || strokeData.page == curPage)
paths.push(<InkingStroke key={id} id={id} line={strokeData.pathData}
offsetX={this.maxCanvasDim - this.inkMidX}
offsetY={this.maxCanvasDim - this.inkMidY}
color={strokeData.color} width={strokeData.width}
tool={strokeData.tool} deleteCallback={this.removeLine} />)
return paths;
}, [] as JSX.Element[]);
return [<svg className={`inkingCanvas-paths-markers`} key="Markers"
style={{ left: `${this.inkMidX - this.maxCanvasDim}px`, top: `${this.inkMidY - this.maxCanvasDim}px` }} >
{paths.filter(path => path.props.tool == InkTool.Highlighter)}
</svg>,
<svg className={`inkingCanvas-paths-ink`} key="Pens"
style={{ left: `${this.inkMidX - this.maxCanvasDim}px`, top: `${this.inkMidY - this.maxCanvasDim}px` }}>
{paths.filter(path => path.props.tool != InkTool.Highlighter)}
</svg>];
}
render() {
let svgCanvasStyle = InkingControl.Instance.selectedTool != InkTool.None ? "canSelect" : "noSelect";
return (
<div className="inkingCanvas" >
<div className={`inkingCanvas-${svgCanvasStyle}`} onPointerDown={this.onPointerDown} />
{this.props.children()}
{this.drawnPaths}
</div >
)
}
}
|
