Press n or j to go to the next uncovered block, b, p or k for the previous block.
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 | const getArea = (a, b) => a * b; const getPointDistance = (a, b) => Math.sqrt(Math.pow(a[0] - b[0], 2) + Math.pow(a[1] - b[1], 2)); export const getElementVisibleWidth = (elementWidth, xOffset, ScreenWidth) => { // Element is fully visible OR scrolled right if (xOffset >= 0) { return xOffset + elementWidth <= ScreenWidth // is element fully visible? ? elementWidth // element is fully visible; : ScreenWidth - xOffset; // calculate visible width of scrolled element } // Element is scrolled LEFT return elementWidth - xOffset; // calculate visible width of scrolled element }; /* type Coord = { x: number, y: number, }; ~Tooltip coordinate system:~ The tooltip coordinates are based on the element which it is wrapping. We take the x and y coordinates of the element and find the best position to place the tooltip. To find the best position we look for the side with the most space. In order to find the side with the most space we divide the the surroundings in four quadrants and check for the one with biggest area. Once we know the quandrant with the biggest area it place the tooltip in that direction. To find the areas we first get 5 coordinate points. The center and the other 4 extreme points which together make a perfect cross shape. Once we know the coordincates we can get the length of the vertices which form each quadrant. Since they are squares we only need two. */ const getTooltipCoordinate = ( x, y, width, height, ScreenWidth, ScreenHeight, tooltipWidth, tooltipHeight, withPointer ) => { // The following are point coordinates: [x, y] const center = [ x + getElementVisibleWidth(width, x, ScreenWidth) / 2, y + height / 2, ]; const pOne = [center[0], 0]; const pTwo = [ScreenWidth, center[1]]; const pThree = [center[0], ScreenHeight]; const pFour = [0, center[1]]; // vertices const vOne = getPointDistance(center, pOne); const vTwo = getPointDistance(center, pTwo); const vThree = getPointDistance(center, pThree); const vFour = getPointDistance(center, pFour); // Quadrant areas. // type Areas = { // area: number, // id: number, // }; const areas = [ getArea(vOne, vFour), getArea(vOne, vTwo), getArea(vTwo, vThree), getArea(vThree, vFour), ].map((each, index) => ({ area: each, id: index })); const sortedArea = areas.sort((a, b) => b.area - a.area); // deslocated points const dX = 0.001; const dY = height / 2; // Deslocate the coordinates in the direction of the quadrant. const directionCorrection = [[-1, -1], [1, -1], [1, 1], [-1, 1]]; const deslocateReferencePoint = [ [-tooltipWidth, -tooltipHeight], [0, -tooltipHeight], [0, 0], [-tooltipWidth, 0], ]; // current quadrant index const qIndex = sortedArea[0].id; const getWithPointerOffsetY = () => withPointer ? 10 * directionCorrection[qIndex][1] : 0; const getWithPointerOffsetX = () => withPointer ? center[0] - 18 * directionCorrection[qIndex][0] : center[0]; const newX = getWithPointerOffsetX() + (dX * directionCorrection[qIndex][0] + deslocateReferencePoint[qIndex][0]); return { x: constraintX(newX, qIndex, center[0], ScreenWidth, tooltipWidth), y: center[1] + (dY * directionCorrection[qIndex][1] + deslocateReferencePoint[qIndex][1]) + getWithPointerOffsetY(), }; }; const constraintX = (newX, qIndex, x, ScreenWidth, tooltipWidth) => { switch (qIndex) { // 0 and 3 are the left side quadrants. case 0: case 3: { const maxWidth = newX > ScreenWidth ? ScreenWidth - 10 : newX; return newX < 1 ? 10 : maxWidth; } // 1 and 2 are the right side quadrants case 1: case 2: { const leftOverSpace = ScreenWidth - newX; return leftOverSpace >= tooltipWidth ? newX : newX - (tooltipWidth - leftOverSpace + 10); } default: { return 0; } } }; export default getTooltipCoordinate; |