lost-sia/src/Annotation/InfSelectionArea.jsx

Single Image Annotation Tool

import React, { Component } from "react";

class InfSelectionArea extends Component {
  constructor(props) {
    super(props);
    this.state = {
      selAreaCss: "sel-area-off",
    };
  }

  componentDidMount() {
    if (this.props.enable) {
      this.enableSelArea();
    } else {
      this.disableSelArea();
    }
  }

  componentDidUpdate() {
    if (this.props.enable) {
      this.enableSelArea();
    } else {
      this.disableSelArea();
    }
  }

  onMouseMove(e) {
    if (this.props.onMouseMove) {
      this.props.onMouseMove(e);
    }
  }

  onMouseUp(e) {
    if (this.props.onMouseUp) {
      this.props.onMouseUp(e);
    }
  }

  enableSelArea() {
    if (this.state.selAreaCss !== "sel-area-on") {
      this.setState({ selAreaCss: "sel-area-on" });
    }
  }

  disableSelArea() {
    if (this.state.selAreaCss !== "sel-area-off") {
      this.setState({ selAreaCss: "sel-area-off" });
    }
  }

  /*************
   * RENDERING *
   **************/
  render() {
    return (
      <circle
        cx={this.props.svg.width / 2}
        cy={this.props.svg.height / 2}
        r={"100%"}
        className={this.state.selAreaCss}
        onMouseMove={(e) => {
          this.onMouseMove(e);
        }}
        onMouseUp={(e) => {
          this.onMouseUp(e);
        }}
      />
    );
  }
}

export default InfSelectionArea;