tip+brush combination

src/interactions/brush.js

@@ -55,6 +55,7 @@ export class Brush extends Mark {
           if (type === "start" && !snapping) {
             target = event.sourceEvent?.currentTarget ?? this;
             currentNode = _brushNodes.indexOf(target);
+            if (event.sourceEvent) context.ownerSVGElement.classList.add("no-tip");
             if (!sync) {
               syncing = true;
               selectAll(_brushNodes.filter((_, i) => i !== currentNode)).call(_brush.move, null);
@@ -69,6 +70,7 @@ export class Brush extends Mark {
 
           if (selection === null) {
             if (type === "end") {
+              context.ownerSVGElement.classList.remove("no-tip");
               if (sync) {
                 syncing = true;
                 selectAll(_brushNodes.filter((_, i) => i !== currentNode)).call(_brush.move, null);

src/interactions/pointer.js

@@ -140,7 +140,8 @@ function pointerK(kx, ky, {x, y, px, py, maxRadius = 40, channels, render, ...op
       // squashed, selecting primarily on the dominant dimension. Across facets,
       // use unsquashed distance to determine the winner.
       function pointermove(event) {
-        if (state.sticky || (event.pointerType === "mouse" && event.buttons === 1)) return; // dragging
+        if (state.sticky) return;
+        if (event.pointerType === "mouse" && event.buttons === 1) return void update(null); // hide tip during drag
         let [xp, yp] = pointof(event);
         (xp -= tx), (yp -= ty); // correct for facets and band scales
         const kpx = xp < dimensions.marginLeft || xp > dimensions.width - dimensions.marginRight ? 1 : kx;
@@ -166,6 +167,7 @@ function pointerK(kx, ky, {x, y, px, py, maxRadius = 40, channels, render, ...op
         if (i == null) return; // not pointing
         if (state.sticky && state.roots.some((r) => r?.contains(event.target))) return; // stay sticky
         if (state.sticky) (state.sticky = false), state.renders.forEach((r) => r(null)); // clear all pointers
+        else if (svg.classList.contains("no-tip")) return void update(null); // cancel tip on brush start
         else (state.sticky = true), render(i);
         event.stopImmediatePropagation(); // suppress other pointers
       }