All files / app/components HorizontalScroller.tsx

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223                                  4x             4x           4x           4x         4x                       4x               4x               4x                     4x           4x 4x 4x   4x 4x       4x       5x 5x 1x         9x                                                                                                 9x 9x   9x 9x   9x     9x   9x 4x                               4x 1x 1x 1x   1x 1x 1x   1x     4x 1x 1x     4x 1x 1x 1x 1x   1x 1x 1x   1x     4x 1x 1x 1x 1x   1x      
import React from 'react';
import { style } from 'app/styles';
import { debounce } from 'app/utilities/debounce';
 
import { CaretRightIcon } from 'app/components/CaretRightIcon';
import { CaretLeftIcon } from 'app/components/CaretLeftIcon';
 
export interface HorizontalScrollerProps {
  // The children are the menu content
  children: string | JSX.Element | JSX.Element[];
  scrollLeft?: number;
  style?: string | object;
  innerStyle?: string | object;
  iconStyle?: string | object;
  onScroll?: (scrollLeft: number) => void;
}
 
const initialState = {
  showingLeftTouch: true,
  showingRightTouch: true,
};
 
type HorizontalScrollerState = Readonly<typeof initialState>;
 
const farOuterStyle = {
  display: 'flex',
  width: '100%',
  position: 'relative',
};
 
const outerStyle = {
  _extends: 'fill',
  overflowX: 'scroll',
  position: 'relative',
};
 
const innerContainerStyle = {
  position: 'relative',
  display: 'block',
};
 
const touchArea = {
  position: 'absolute',
  top: 0,
  width: 40,
  height: '100%',
  verticalAlign: 'middle',
  zIndex: 2,
  marginTop: 5,
  opacity: 0.5,
  color: '@colors.selectable',
};
 
const leftTouchStyle = {
  _extends: touchArea,
  left: -10,
  // borderTop: '60px solid transparent',
  // borderBottom: '60px solid transparent',
  // borderRight: '20px solid rgba(96, 96, 96, .6)',
};
 
const rightTouchStyle = {
  _extends: touchArea,
  right: -20,
  // borderTop: '60px solid transparent',
  // borderBottom: '60px solid transparent',
  // borderLeft: '20px solid rgba(96, 96, 96, .6)',
};
 
const iconStyle = {
  transform: 'scaleY(3)',
  maxHeight: '50%',
  top: '12%',
  position: 'absolute',
};
 
export class HorizontalScroller extends React.Component<
  HorizontalScrollerProps,
  HorizontalScrollerState
> {
  readonly state: HorizontalScrollerState = initialState;
  private innerContainerRef;
  private outerContainerRef;
  private debouncedOnScroll;
 
  constructor(props) {
    super(props);
    this.innerContainerRef = React.createRef();
    this.outerContainerRef = React.createRef();
 
    this.onScroll = this.onScroll.bind(this);
    this.debouncedOnScroll = debounce(this.onScroll, 50);
  }
 
  componentDidMount() {
    this.showHideTouchControls();
  }
 
  componentDidUpdate(prevProps) {
    this.showHideTouchControls();
    if (prevProps.scrollLeft !== this.props.scrollLeft) {
      this.outerContainerRef.current.scrollLeft = this.props.scrollLeft;
    }
  }
 
  render() {
    return (
      <div style={style(farOuterStyle)}>
        <div
          style={style(outerStyle, this.props.style)}
          ref={this.outerContainerRef}
          onScroll={this.debouncedOnScroll}
          data-testid="outerContainer"
        >
          <div
            style={style(innerContainerStyle, this.props.innerStyle)}
            ref={this.innerContainerRef}
            data-testid="innerContainer"
          >
            {this.props.children}
          </div>
        </div>
        {this.state.showingLeftTouch && (
          <div
            style={style(leftTouchStyle)}
            onClick={this.onLeftTouchClick}
            onDoubleClick={this.onLeftTouchDoubleClick}
            data-testid="leftTouch"
          >
            <CaretLeftIcon
              width={40}
              height={100}
              style={style(iconStyle, this.props.iconStyle)}
            />{' '}
          </div>
        )}
        {this.state.showingRightTouch && (
          <div
            style={style(rightTouchStyle)}
            onClick={this.onRightTouchClick}
            onDoubleClick={this.onRightTouchDoubleClick}
            data-testid="rightTouch"
          >
            <CaretRightIcon
              width={40}
              height={100}
              style={style(iconStyle, this.props.iconStyle)}
            />
          </div>
        )}
      </div>
    );
  }
 
  private showHideTouchControls() {
    const innerEl = this.innerContainerRef.current;
    const outerEl = this.outerContainerRef.current;
 
    const innerBoundingRect = innerEl.getBoundingClientRect();
    const showingLeftTouch = outerEl.scrollLeft > 0;
    const showingRightTouch =
      innerEl.scrollWidth > outerEl.clientWidth &&
      outerEl.scrollLeft + innerBoundingRect.width < innerEl.scrollWidth;
    const shouldUpdate =
      showingLeftTouch !== this.state.showingLeftTouch ||
      showingRightTouch !== this.state.showingRightTouch;
    if (shouldUpdate) {
      this.setState({ showingLeftTouch, showingRightTouch });
    }
    // console.log('innerBoundingRect', innerBoundingRect);
    // console.log('innerEl.scrollWidth', innerEl.scrollWidth);
    // console.log('outerEl.clientWidth', outerEl.clientWidth);
    // console.log('outerEl.scrollLeft', outerEl.scrollLeft);
    // console.log('showingLeftTouch', showingLeftTouch);
    // console.log('showingRightTouch', showingRightTouch);
  }
 
  private onScroll() {
    this.showHideTouchControls();
    this.props.onScroll &&
      this.props.onScroll(this.outerContainerRef.current.scrollLeft);
  }
 
  private onLeftTouchClick = () => {
    const innerEl = this.innerContainerRef.current;
    const outerEl = this.outerContainerRef.current;
    const innerBoundingRect = innerEl.getBoundingClientRect();
 
    let newScrollLeft = outerEl.scrollLeft - innerBoundingRect.width + 50;
    Eif (newScrollLeft < 0) {
      newScrollLeft = 0;
    }
    outerEl.scrollLeft = newScrollLeft;
  };
 
  private onLeftTouchDoubleClick = () => {
    const outerEl = this.outerContainerRef.current;
    outerEl.scrollLeft = 0;
  };
 
  private onRightTouchClick = () => {
    const innerEl = this.innerContainerRef.current;
    const outerEl = this.outerContainerRef.current;
    const innerBoundingRect = innerEl.getBoundingClientRect();
    const maxScrollLeft = innerEl.scrollWidth - innerBoundingRect.width;
 
    let newScrollLeft = outerEl.scrollLeft + innerBoundingRect.width - 50;
    Eif (newScrollLeft > maxScrollLeft) {
      newScrollLeft = maxScrollLeft;
    }
    outerEl.scrollLeft = newScrollLeft;
  };
 
  private onRightTouchDoubleClick = () => {
    const innerEl = this.innerContainerRef.current;
    const outerEl = this.outerContainerRef.current;
    const innerBoundingRect = innerEl.getBoundingClientRect();
    const maxScrollLeft = innerEl.scrollWidth - innerBoundingRect.width;
 
    outerEl.scrollLeft = maxScrollLeft;
  };
}