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 | import { useState, useCallback, useEffect, RefObject } from "react";
import * as d3 from "d3";
interface DataItem {
label: string;
code?: string;
value1: number;
value2: number;
difference: number;
date: string;
}
interface TooltipState {
x: number;
y: number;
data: DataItem;
isSticky?: boolean;
}
export const useGapChartTooltip = (
svgRef: RefObject<SVGSVGElement>,
containerRef: RefObject<HTMLDivElement>,
onHighlightItem?: (item: DataItem) => void
) => {
const [tooltip, setTooltip] = useState<TooltipState | null>(null);
// Handle mouse over
const handleMouseOver = useCallback(
(d: DataItem, event: React.MouseEvent<SVGElement>) => {
// Don't update tooltip if it's sticky
if (tooltip?.isSticky) return;
if (svgRef.current) {
const [mouseX, mouseY] = d3.pointer(event.nativeEvent, svgRef.current);
setTooltip({
x: mouseX,
y: mouseY,
data: d,
isSticky: false,
});
onHighlightItem?.(d);
}
},
[onHighlightItem, tooltip?.isSticky, svgRef]
);
// Handle mouse out
const handleMouseOut = useCallback(() => {
// Don't hide tooltip if it's sticky
if (!tooltip?.isSticky) {
setTooltip(null);
}
}, [tooltip?.isSticky]);
// Handle click on chart elements to make tooltip sticky
const handleChartElementClick = useCallback(
(d: DataItem, event: React.MouseEvent<SVGElement>) => {
event.stopPropagation();
if (svgRef.current) {
const [mouseX, mouseY] = d3.pointer(event.nativeEvent, svgRef.current);
setTooltip({
x: mouseX,
y: mouseY,
data: d,
isSticky: true,
});
onHighlightItem?.(d);
}
},
[onHighlightItem, svgRef]
);
// Handle tooltip click to make it sticky
const handleTooltipClick = useCallback(
(event: React.MouseEvent) => {
event.stopPropagation();
if (tooltip && !tooltip.isSticky) {
setTooltip({ ...tooltip, isSticky: true });
}
},
[tooltip]
);
// Handle click outside to close sticky tooltip
useEffect(() => {
const handleClickOutside = (event: MouseEvent) => {
if (tooltip?.isSticky) {
const tooltipElement = (event.target as HTMLElement).closest(".tooltip");
if (!tooltipElement) {
setTooltip(null);
}
}
};
if (tooltip?.isSticky) {
document.addEventListener("click", handleClickOutside);
return () => {
document.removeEventListener("click", handleClickOutside);
};
}
}, [tooltip?.isSticky]);
// Update tooltip position on scroll/resize
useEffect(() => {
if (!tooltip?.isSticky || !svgRef.current) return;
const updateTooltipPosition = () => {
if (svgRef.current && tooltip) {
const containerRect = containerRef.current?.getBoundingClientRect();
if (containerRect) {
// Recalculate position relative to the container
const newX = tooltip.x;
const newY = tooltip.y;
setTooltip(prev => (prev ? { ...prev, x: newX, y: newY } : null));
}
}
};
window.addEventListener("resize", updateTooltipPosition);
window.addEventListener("scroll", updateTooltipPosition, true);
return () => {
window.removeEventListener("resize", updateTooltipPosition);
window.removeEventListener("scroll", updateTooltipPosition, true);
};
}, [tooltip, svgRef, containerRef]);
return {
tooltip,
handleMouseOver,
handleMouseOut,
handleChartElementClick,
handleTooltipClick,
};
};
|