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import styled from "styled-components";
import { ChartMetadata } from "src/types/data";
import Title from "./shared/Title";
import XaxisLinear from "./shared/XaxisLinear";
import YaxisBand from "./shared/YaxisBand";
import LoadingIndicator from "./shared/LoadingIndicator";
import { useChartContext } from "./MichiVzProvider";
import { useDisplayIsNodata } from "./hooks/useDisplayIsNodata";
import { useGapChartData } from "./hooks/gapChart/useGapChartData";
import { useGapChartScales } from "./hooks/gapChart/useGapChartScales";
import { useGapChartColors } from "./hooks/gapChart/useGapChartColors";
import { useGapChartTooltip } from "./hooks/gapChart/useGapChartTooltip";
import { useGapChartShapes } from "./hooks/gapChart/useGapChartShapes";
import { useGapChartRenderer } from "./hooks/gapChart/useGapChartRenderer";
import { useGapChartLegend } from "./hooks/gapChart/useGapChartLegend";
import { useGapChartMetadata } from "./hooks/gapChart/useGapChartMetadata";
import { useGapChartAnimation } from "./hooks/gapChart/useGapChartAnimation";
const DEFAULT_WIDTH = 1000;
const DEFAULT_HEIGHT = 500;
const DEFAULT_MARGIN = { top: 50, right: 150, bottom: 100, left: 150 };
const GapChartStyled = styled.div<{ $enableTransitions: boolean }>`
position: relative;
.gap-bar {
/* Transitions are now handled inline based on animation state */
}
.gap-line {
stroke-width: 2;
fill: none;
/* Transitions are now handled inline based on animation state */
}
.gap-marker {
/* Transitions are now handled inline based on animation state */
}
.tooltip {
position: absolute;
background: white;
border: 1px solid #ccc;
border-radius: 4px;
padding: 8px;
pointer-events: none;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
font-size: 12px;
z-index: 10;
&.sticky {
pointer-events: auto;
cursor: default;
border-color: #666;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}
}
`;
interface DataItem {
label: string;
code?: string;
value1: number;
value2: number;
difference: number; // sugggest formula to calculate difference is value1 - value2, we use this property for sorting items (when the filter property is defined)
date: string;
}
interface Filter {
limit: number;
date: number | string;
criteria: string;
sortingDir: "asc" | "desc";
}
interface LegendItem {
type: "value1" | "value2" | "gap";
label: string;
color?: string;
shape?: "circle" | "square" | "triangle";
}
interface GapChartProps {
dataSet: DataItem[];
title: string;
colors?: string[];
colorsMapping?: Record<string, string>; // predefined colors mapping for specific labels, if not defined, the colors array will be to use generated colors, and generated colors will be cached so that the color of a specific label will not change between renders
colorMode?: "label" | "shape"; // whether to assign colors by label (default) or by shape
shapeColorsMapping?: {
value1?: string;
value2?: string;
gap?: string;
}; // explicit color mapping for shapes when colorMode is "shape"
highlightItems?: string[]; // items to highlight, if not defined, all items will be highlighted
disabledItems?: string[]; // items to disable (not being rendered), if not defined, all items will be showed
tooltipFormatter?: (data: DataItem) => string;
filter: Filter | undefined;
shapeValue1: "circle" | "square" | "triangle";
shapeValue2: "circle" | "square" | "triangle";
shapesLabelsMapping?: {
value1?: string;
value2?: string;
gap?: string;
};
legendFormatter?: (items: LegendItem[]) => LegendItem[];
xAxisDataType: "number" | "date_annual" | "date_monthly";
yAxisFormat?: (d: number) => string;
xAxisFormat?: (d: number) => string;
ticks?: number;
width: number;
height: number;
margin: { top: number; right: number; bottom: number; left: number };
tickHtmlWidth?: number;
onHighlightItem?: (item: DataItem) => void;
onDisabledItem?: (item: DataItem) => void;
onColorChange?: (item: DataItem, color: string) => void;
onChartDataProcessed?: (metadata: ChartMetadata) => void;
isNodata?: boolean | ((dataSet: DataItem[]) => boolean);
isNodataComponent?: React.ReactNode;
isLoading?: boolean;
isLoadingComponent?: React.ReactNode;
enableTransitions?: boolean;
legendAlign?: "left" | "center" | "right";
squareRadius?: number; // border radius for square shapes (default: 2)
}
const GapChart: FC<GapChartProps> = ({
dataSet,
title,
colors = [
"#1f77b4",
"#ff7f0e",
"#2ca02c",
"#d62728",
"#9467bd",
"#8c564b",
"#e377c2",
"#7f7f7f",
"#bcbd22",
"#17becf",
],
colorsMapping,
colorMode = "label",
shapeColorsMapping,
highlightItems: propsHighlightItems,
disabledItems: propsDisabledItems,
tooltipFormatter,
filter,
shapeValue1,
shapeValue2,
shapesLabelsMapping,
legendFormatter,
xAxisDataType,
yAxisFormat,
xAxisFormat,
ticks = 5,
width = DEFAULT_WIDTH,
height = DEFAULT_HEIGHT,
margin = DEFAULT_MARGIN,
tickHtmlWidth,
onHighlightItem,
onChartDataProcessed,
isNodata,
isNodataComponent,
isLoading,
isLoadingComponent,
enableTransitions = true,
legendAlign = "left",
squareRadius = 2,
}) => {
const svgRef = useRef<SVGSVGElement | null>(null);
const containerRef = useRef<HTMLDivElement | null>(null);
const [hoveredYItem, setHoveredYItem] = useState<string | null>(null);
const [isRendering, setIsRendering] = useState(false);
const { highlightItems: contextHighlightItems, disabledItems: contextDisabledItems } =
useChartContext();
const highlightItems = propsHighlightItems || contextHighlightItems || [];
const disabledItems = propsDisabledItems || contextDisabledItems || [];
// Process data and get domains
const { processedDataSet, yAxisDomain, xAxisDomain } = useGapChartData(
dataSet,
filter,
disabledItems
);
// Get scales
const { xScale, yScale } = useGapChartScales(
xAxisDomain,
yAxisDomain,
width,
height,
margin,
xAxisDataType,
tickHtmlWidth
);
// Get color function
const { getColor, getShapeColor } = useGapChartColors(
yAxisDomain,
colors,
colorsMapping,
colorMode,
shapeColorsMapping
);
// Get tooltip handlers
const { tooltip, handleMouseOver, handleMouseOut, handleChartElementClick, handleTooltipClick } =
useGapChartTooltip(svgRef, containerRef, onHighlightItem);
// Get shape generation function
const { getShapePath, getSquareDimensions } = useGapChartShapes();
// Get animation state
const { animationState, getItemOpacity, getItemTransform, renderDataSet, shouldTransition } =
useGapChartAnimation(processedDataSet, enableTransitions);
// Get render data with animation support
const renderData = useGapChartRenderer({
processedDataSet: renderDataSet,
xScale,
yScale,
getColor,
getShapeColor,
colorMode,
highlightItems,
shapeValue1,
shapeValue2,
hoveredYItem,
animationState,
getItemOpacity,
getItemTransform,
shouldTransition,
});
// Get legend items
const { legendItems } = useGapChartLegend({
shapesLabelsMapping,
shapeValue1,
shapeValue2,
colorMode,
shapeColorsMapping,
legendFormatter,
});
// Handle metadata
useGapChartMetadata({
processedDataSet,
xAxisDomain,
onChartDataProcessed,
});
// Track when data is being re-rendered
useEffect(() => {
setIsRendering(true);
// Set a small delay to ensure the axis hides before shapes start rendering
const timer = setTimeout(() => {
setIsRendering(false);
}, 100);
return () => clearTimeout(timer);
}, [processedDataSet, xScale, yScale, yAxisFormat]);
// Check if no data
const displayIsNodata = useDisplayIsNodata({
dataSet,
isLoading,
isNodataComponent,
isNodata,
});
// Render gap bars and shapes in layers
const renderGapBars = useMemo(() => {
const { elements, squares, nonSquares } = renderData;
return (
<>
{/* First layer: Render all gap bars and lines */}
{elements.map(
({
d,
i,
y,
barHeight,
gapColor,
x1,
x2,
barWidth,
barOpacity,
markerOpacity,
hasTransition,
}) => (
<g key={`gap-base-${d.label}-${i}`}>
{/* Gap bar */}
<rect
className="gap-bar"
x={x1}
y={y + barHeight / 2 - 4}
width={barWidth}
height={8}
fill={gapColor}
opacity={barOpacity}
rx={4}
ry={4}
onMouseOver={e => handleMouseOver(d, e)}
onMouseOut={handleMouseOut}
onClick={e => handleChartElementClick(d, e)}
style={{
cursor: "pointer",
transition:
enableTransitions && hasTransition
? "x 0.3s ease-out, y 0.3s ease-out, width 0.3s ease-out, opacity 0.3s ease-out"
: "none",
}}
/>
{/* Connecting line */}
<line
className="gap-line"
x1={x1}
y1={y + barHeight / 2}
x2={x2}
y2={y + barHeight / 2}
stroke="white"
strokeDasharray={d.difference < 0 ? "4,2" : "0"}
opacity={markerOpacity}
style={{
transition: enableTransitions && hasTransition ? "opacity 0.3s ease-out" : "none",
}}
/>
</g>
)
)}
{/* Second layer: Render all square shapes */}
{squares.map(
({ d, i, y, barHeight, value1Color, value2Color, markerOpacity, hasTransition }) => (
<g key={`gap-squares-${d.label}-${i}`}>
{shapeValue1 === "square" &&
(() => {
const dims = getSquareDimensions();
return (
<rect
className="gap-marker value1-marker"
x={xScale(d.value1) + dims.x}
y={y + barHeight / 2 + dims.y}
width={dims.width}
height={dims.height}
fill={value1Color}
opacity={markerOpacity}
rx={squareRadius}
ry={squareRadius}
onMouseOver={e => handleMouseOver(d, e)}
onMouseOut={handleMouseOut}
onClick={e => handleChartElementClick(d, e)}
style={{
cursor: "pointer",
transition:
enableTransitions && hasTransition ? "opacity 0.3s ease-out" : "none",
}}
/>
);
})()}
{shapeValue2 === "square" &&
(() => {
const dims = getSquareDimensions();
return (
<rect
className="gap-marker value2-marker"
x={xScale(d.value2) + dims.x}
y={y + barHeight / 2 + dims.y}
width={dims.width}
height={dims.height}
fill={value2Color}
opacity={markerOpacity}
rx={2}
ry={2}
onMouseOver={e => handleMouseOver(d, e)}
onMouseOut={handleMouseOut}
onClick={e => handleChartElementClick(d, e)}
style={{
cursor: "pointer",
transition:
enableTransitions && hasTransition ? "opacity 0.3s ease-out" : "none",
}}
/>
);
})()}
</g>
)
)}
{/* Third layer: Render all circle and triangle shapes */}
{nonSquares.map(
({
d,
i,
y,
barHeight,
value1Color,
value2Color,
markerOpacity,
itemTransform,
hasTransition,
}) => (
<g key={`gap-nonSquares-${d.label}-${i}`}>
{shapeValue1 !== "square" && (
<path
className="gap-marker value1-marker"
d={getShapePath(shapeValue1) || ""}
transform={`translate(${xScale(d.value1)}, ${y + barHeight / 2}) ${itemTransform}`}
fill={value1Color}
opacity={markerOpacity}
onMouseOver={e => handleMouseOver(d, e)}
onMouseOut={handleMouseOut}
onClick={e => handleChartElementClick(d, e)}
style={{
cursor: "pointer",
transition:
enableTransitions && hasTransition ? "opacity 0.3s ease-out" : "none",
}}
/>
)}
{shapeValue2 !== "square" && (
<path
className="gap-marker value2-marker"
d={getShapePath(shapeValue2) || ""}
transform={`translate(${xScale(d.value2)}, ${y + barHeight / 2}) ${itemTransform}`}
fill={value2Color}
opacity={markerOpacity}
onMouseOver={e => handleMouseOver(d, e)}
onMouseOut={handleMouseOut}
onClick={e => handleChartElementClick(d, e)}
style={{
cursor: "pointer",
transition:
enableTransitions && hasTransition ? "opacity 0.3s ease-out" : "none",
}}
/>
)}
</g>
)
)}
</>
);
}, [
renderData,
xScale,
shapeValue1,
shapeValue2,
handleMouseOver,
handleMouseOut,
handleChartElementClick,
getShapePath,
]);
return (
<GapChartStyled ref={containerRef} $enableTransitions={enableTransitions}>
<svg ref={svgRef} width={width} height={height} style={{ overflow: "visible" }}>
<Title x={width / 2} y={margin.top / 2}>
{title}
</Title>
<XaxisLinear
xScale={xScale}
height={height}
margin={margin}
xAxisFormat={xAxisFormat}
xAxisDataType={xAxisDataType}
ticks={ticks}
showGrid={true}
showZeroLine={true}
/>
<YaxisBand
yScale={yScale}
width={width}
margin={margin}
yAxisFormat={yAxisFormat}
showGrid={true}
onHover={setHoveredYItem}
hoveredItem={hoveredYItem}
tickHtmlWidth={tickHtmlWidth}
enableTransitions={enableTransitions}
isRendering={isRendering}
/>
<g className="gap-chart-content">{renderGapBars}</g>
{/* Legend */}
{shapesLabelsMapping && legendItems.length > 0 && (
<g
transform={`translate(${
legendAlign === "left"
? margin.left
: legendAlign === "right"
? width - margin.right
: width / 2
}, ${height - margin.bottom / 2 + 20})`}
>
{/* Create a flex-like layout for legend items */}
{(() => {
const items = [];
const itemWidth = 180;
const itemSpacing = 40;
const shapeOffset = 15;
// Calculate total width needed
const activeItems = legendItems.length;
const totalWidth = activeItems * itemWidth + (activeItems - 1) * itemSpacing;
let currentX =
legendAlign === "left"
? 0
: legendAlign === "right"
? -totalWidth
: -totalWidth / 2;
// Render legend items based on the processed array
legendItems.forEach(legendItem => {
if (legendItem.type === "gap") {
items.push(
<g key={legendItem.type} transform={`translate(${currentX}, 0)`}>
<rect
x={-10}
y={-5}
width={20}
height={10}
fill={legendItem.color || "#999"}
opacity={0.7}
rx={2}
ry={2}
/>
<foreignObject
x={shapeOffset + 5}
y={-10}
width={itemWidth - shapeOffset - 10}
height={20}
>
<div
style={{
fontSize: "12px",
color: legendItem.color || "#666",
whiteSpace: "nowrap",
overflow: "hidden",
textOverflow: "ellipsis",
paddingLeft: "5px",
}}
title={legendItem.label}
>
{legendItem.label}
</div>
</foreignObject>
</g>
);
} else {
// Value1 or Value2 shape items
const shape = legendItem.shape || shapeValue1;
items.push(
<g key={legendItem.type} transform={`translate(${currentX}, 0)`}>
{shape === "square" ? (
(() => {
const dims = getSquareDimensions(12);
return (
<rect
x={dims.x}
y={dims.y}
width={dims.width}
height={dims.height}
fill={legendItem.color || "#666"}
rx={2}
ry={2}
/>
);
})()
) : (
<path d={getShapePath(shape, 12) || ""} fill={legendItem.color || "#666"} />
)}
<foreignObject
x={shapeOffset}
y={-10}
width={itemWidth - shapeOffset - 5}
height={20}
>
<div
style={{
fontSize: "12px",
color: legendItem.color || "#666",
whiteSpace: "nowrap",
overflow: "hidden",
textOverflow: "ellipsis",
paddingLeft: "5px",
}}
title={legendItem.label}
>
{legendItem.label}
</div>
</foreignObject>
</g>
);
}
currentX += itemWidth + itemSpacing;
});
return items;
})()}
</g>
)}
</svg>
{tooltip && (
<div
className={`tooltip ${tooltip.isSticky ? "sticky" : ""}`}
style={{
left: `${tooltip.x + 10}px`,
top: `${tooltip.y - 10}px`,
}}
onClick={handleTooltipClick}
>
{tooltipFormatter ? (
tooltipFormatter(tooltip.data)
) : (
<div>
<strong>{tooltip.data.label}</strong>
<br />
Value 1: {tooltip.data.value1}
<br />
Value 2: {tooltip.data.value2}
<br />
Difference: {tooltip.data.difference}
</div>
)}
{!tooltip.isSticky && (
<div style={{ fontSize: "10px", marginTop: "4px", color: "#666", fontStyle: "italic" }}>
Click chart or tooltip to pin
</div>
)}
</div>
)}
{isLoading && (isLoadingComponent || <LoadingIndicator />)}
{displayIsNodata && isNodataComponent}
</GapChartStyled>
);
};
export default GapChart;
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