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import { observer } from "mobx-react";
import React = require("react");
import { action, computed, trace } from "mobx";
import { CollectionFreeFormDocumentView } from "../nodes/CollectionFreeFormDocumentView";
import { DragManager } from "../../util/DragManager";
import "./CollectionFreeFormView.scss";
import { COLLECTION_BORDER_WIDTH } from "./CollectionView";
import { KeyStore } from "../../../fields/KeyStore";
import { Document } from "../../../fields/Document";
import { ListField } from "../../../fields/ListField";
import { FieldWaiting } from "../../../fields/Field";
import { Transform } from "../../util/Transform";
import { DocumentView } from "../nodes/DocumentView";
import { undoBatch } from "../../util/UndoManager";
import { CollectionViewBase, SubCollectionViewProps } from "./CollectionViewBase";
@observer
export class CollectionFreeFormView extends CollectionViewBase {
private _canvasRef = React.createRef<HTMLDivElement>();
private _lastX: number = 0;
private _lastY: number = 0;
private _downX: number = 0;
private _downY: number = 0;
@computed
get isAnnotationOverlay() { return this.props.fieldKey == KeyStore.Annotations; }
@computed
get nativeWidth() { return this.props.Document.GetNumber(KeyStore.NativeWidth, 0); }
@computed
get nativeHeight() { return this.props.Document.GetNumber(KeyStore.NativeHeight, 0); }
@computed
get zoomScaling() { return this.props.Document.GetNumber(KeyStore.Scale, 1); }
@computed
get resizeScaling() { return this.isAnnotationOverlay ? this.props.Document.GetNumber(KeyStore.Width, 0) / this.nativeWidth : 1; }
constructor(props: SubCollectionViewProps) {
super(props);
}
@undoBatch
@action
drop = (e: Event, de: DragManager.DropEvent) => {
super.drop(e, de);
const doc: DocumentView = de.data["document"];
const xOffset = de.data["xOffset"] as number || 0;
const yOffset = de.data["yOffset"] as number || 0;
//this should be able to use translate and scale methods on an Identity transform, no?
const transform = this.getTransform();
const screenX = de.x - xOffset;
const screenY = de.y - yOffset;
const [x, y] = transform.transformPoint(screenX, screenY);
doc.props.Document.SetNumber(KeyStore.X, x);
doc.props.Document.SetNumber(KeyStore.Y, y);
this.bringToFront(doc);
}
@action
onPointerDown = (e: React.PointerEvent): void => {
if ((e.button === 2 && this.props.active()) ||
!e.defaultPrevented) {
document.removeEventListener("pointermove", this.onPointerMove);
document.addEventListener("pointermove", this.onPointerMove);
document.removeEventListener("pointerup", this.onPointerUp);
document.addEventListener("pointerup", this.onPointerUp);
this._downX = this._lastX = e.pageX;
this._downY = this._lastY = e.pageY;
}
}
@action
onPointerUp = (e: PointerEvent): void => {
document.removeEventListener("pointermove", this.onPointerMove);
document.removeEventListener("pointerup", this.onPointerUp);
e.stopPropagation();
if (Math.abs(this._downX - e.clientX) < 3 && Math.abs(this._downY - e.clientY) < 3) {
if (!this.props.isSelected()) {
this.props.select(false);
}
}
}
@action
onPointerMove = (e: PointerEvent): void => {
if (!e.cancelBubble && this.props.active()) {
e.preventDefault();
e.stopPropagation();
let x = this.props.Document.GetNumber(KeyStore.PanX, 0);
let y = this.props.Document.GetNumber(KeyStore.PanY, 0);
let [dx, dy] = this.props.ScreenToLocalTransform().transformDirection(e.clientX - this._lastX, e.clientY - this._lastY);
this.SetPan(x + dx, y + dy);
}
this._lastX = e.pageX;
this._lastY = e.pageY;
}
@action
onPointerWheel = (e: React.WheelEvent): void => {
e.stopPropagation();
e.preventDefault();
let coefficient = 1000;
// if (modes[e.deltaMode] == 'pixels') coefficient = 50;
// else if (modes[e.deltaMode] == 'lines') coefficient = 1000; // This should correspond to line-height??
let transform = this.getTransform();
let deltaScale = (1 - (e.deltaY / coefficient));
let [x, y] = transform.transformPoint(e.clientX, e.clientY);
let localTransform = this.getLocalTransform();
localTransform = localTransform.inverse().scaleAbout(deltaScale, x, y)
this.props.Document.SetNumber(KeyStore.Scale, localTransform.Scale);
this.SetPan(localTransform.TranslateX, localTransform.TranslateY);
}
@action
private SetPan(panX: number, panY: number) {
const newPanX = Math.max((1 - this.zoomScaling) * this.nativeWidth, Math.min(0, panX));
const newPanY = Math.max((1 - this.zoomScaling) * this.nativeHeight, Math.min(0, panY));
this.props.Document.SetNumber(KeyStore.PanX, this.isAnnotationOverlay ? newPanX : panX);
this.props.Document.SetNumber(KeyStore.PanY, this.isAnnotationOverlay ? newPanY : panY);
}
@action
onDrop = (e: React.DragEvent): void => {
const panx: number = this.props.Document.GetNumber(KeyStore.PanX, 0);
const pany: number = this.props.Document.GetNumber(KeyStore.PanY, 0);
let x = e.pageX - panx
let y = e.pageY - pany
super.onDrop(e, { x: x, y: y });
}
onDragOver = (): void => {
}
@action
bringToFront(doc: DocumentView) {
const { fieldKey: fieldKey, Document: Document } = this.props;
const value: Document[] = Document.GetList<Document>(fieldKey, []).slice();
value.sort((doc1, doc2) => {
if (doc1 === doc.props.Document) {
return 1;
}
if (doc2 === doc.props.Document) {
return -1;
}
return doc1.GetNumber(KeyStore.ZIndex, 0) - doc2.GetNumber(KeyStore.ZIndex, 0);
}).map((doc, index) => {
doc.SetNumber(KeyStore.ZIndex, index + 1)
});
}
@computed
get translate(): [number, number] {
const x = this.props.Document.GetNumber(KeyStore.PanX, 0);
const y = this.props.Document.GetNumber(KeyStore.PanY, 0);
return [x, y];
}
@computed
get scale(): number {
return this.props.Document.GetNumber(KeyStore.Scale, 1);
}
getTransform = (): Transform => {
return this.props.ScreenToLocalTransform().translate(-COLLECTION_BORDER_WIDTH, -COLLECTION_BORDER_WIDTH).transform(this.getLocalTransform())
}
getLocalTransform = (): Transform => {
const [x, y] = this.translate;
return Transform.Identity.translate(-x, -y).scale(1 / this.scale);
}
@computed
get views() {
const { fieldKey, Document } = this.props;
const lvalue = Document.GetT<ListField<Document>>(fieldKey, ListField);
if (lvalue && lvalue != FieldWaiting) {
return lvalue.Data.map(doc => {
return (<CollectionFreeFormDocumentView key={doc.Id} Document={doc}
AddDocument={this.props.addDocument}
RemoveDocument={this.props.removeDocument}
ScreenToLocalTransform={this.getTransform}
isTopMost={false}
Scaling={1}
PanelWidth={doc.GetNumber(KeyStore.Width, 0)}
PanelHeight={doc.GetNumber(KeyStore.Height, 0)}
ContainingCollectionView={this.props.CollectionView} />);
})
}
return null;
}
render() {
const panx: number = this.props.Document.GetNumber(KeyStore.PanX, 0);
const pany: number = this.props.Document.GetNumber(KeyStore.PanY, 0);
return (
<div className="collectionfreeformview-container"
onPointerDown={this.onPointerDown}
onWheel={this.onPointerWheel}
onContextMenu={(e) => e.preventDefault()}
onDrop={this.onDrop.bind(this)}
onDragOver={this.onDragOver}
style={{ borderWidth: `${COLLECTION_BORDER_WIDTH}px`, }}
ref={this.createDropTarget}>
<div className="collectionfreeformview"
style={{ width: "100%", transformOrigin: "left top", transform: ` translate(${panx}px, ${pany}px) scale(${this.zoomScaling}, ${this.zoomScaling})` }}
ref={this._canvasRef}>
{this.props.BackgroundView ? this.props.BackgroundView() : null}
{this.views}
</div>
</div>
);
}
}
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