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Move tooltip creation into function

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This commit is contained in:
Henrik Giesel 2021-02-22 14:10:35 +01:00
parent 69448365c4
commit aeb6de9166
1 changed files with 18 additions and 3 deletions
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21
ts/graphs/tooltip.ts
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@ -3,11 +3,24 @@
import throttle from "lodash.throttle";
const tooltipDiv: HTMLDivElement = document.createElement("div");
tooltipDiv.className = "graph-tooltip";
document.body.appendChild(tooltipDiv);
function getOrCreateTooltipDiv(): HTMLDivElement {
const existingTooltip = document.getElementById("graphTooltip") as HTMLDivElement;
if (existingTooltip) {
return existingTooltip;
}
const tooltipDiv: HTMLDivElement = document.createElement("div");
tooltipDiv.id = "graphTooltip";
tooltipDiv.className = "graph-tooltip";
document.body.appendChild(tooltipDiv);
return tooltipDiv
}
function showTooltipInner(msg: string, x: number, y: number): void {
const tooltipDiv = getOrCreateTooltipDiv();
tooltipDiv.innerHTML = msg;
// move tooltip away from edge as user approaches right side
@ -26,6 +39,8 @@ function showTooltipInner(msg: string, x: number, y: number): void {
export const showTooltip = throttle(showTooltipInner, 16);
export function hideTooltip(): void {
const tooltipDiv = getOrCreateTooltipDiv();
showTooltip.cancel();
tooltipDiv.style.opacity = "0";
}