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import { action, observable } from 'mobx';
import { observer } from 'mobx-react';
import "normalize.css";
import * as React from 'react';
import "./PreviewCursor.scss";
@observer
export class PreviewCursor extends React.Component<{}> {
private _prompt = React.createRef<HTMLDivElement>();
static _onKeyPress?: (e: KeyboardEvent) => void;
@observable static _clickPoint = [0, 0];
@observable public static Visible = false;
//when focus is lost, this will remove the preview cursor
@action onBlur = (): void => {
PreviewCursor.Visible = false;
}
constructor(props: any) {
super(props);
document.addEventListener("keydown", this.onKeyPress)
}
@action
onKeyPress = (e: KeyboardEvent) => {
// Mixing events between React and Native is finicky. In FormattedTextBox, we set the
// DASHFormattedTextBoxHandled flag when a text box consumes a key press so that we can ignore
// the keyPress here.
//if not these keys, make a textbox if preview cursor is active!
if (e.key.startsWith("F") && !e.key.endsWith("F")) {
} else if (e.key != "Escape" && e.key != "Alt" && e.key != "Shift" && e.key != "Meta" && e.key != "Control" && !e.defaultPrevented && !(e as any).DASHFormattedTextBoxHandled) {
if ((!e.ctrlKey && !e.metaKey) || e.key === "v") {
PreviewCursor.Visible && PreviewCursor._onKeyPress && PreviewCursor._onKeyPress(e);
PreviewCursor.Visible = false;
}
}
}
@action
public static Show(x: number, y: number, onKeyPress: (e: KeyboardEvent) => void) {
this._clickPoint = [x, y];
this._onKeyPress = onKeyPress;
setTimeout(action(() => this.Visible = true), (1));
}
render() {
if (!PreviewCursor._clickPoint) {
return (null);
}
if (PreviewCursor.Visible && this._prompt.current) {
this._prompt.current.focus();
}
return <div className="previewCursor" id="previewCursor" onBlur={this.onBlur} tabIndex={0} ref={this._prompt}
style={{ transform: `translate(${PreviewCursor._clickPoint[0]}px, ${PreviewCursor._clickPoint[1]}px)`, opacity: PreviewCursor.Visible ? 1 : 0 }}>
I
</div >;
}
}
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