Brush Snapping III

Brush & Zoom II

This example demonstrates how brushing a scatterplot with d3.brush zooms to the selected region, while double-clicking resets the view. The code generates 900 random points in three gaussian clusters, rendering them as colored circles and using a linear scale to map coordinates. The brush’s `end` event updates the x and y domains, then animates the axes and points via `transition`. A 350ms idle timeout distinguishes a brush clear from a double-click reset.

84% match

Brush I

A brushable scatterplot displays 300 randomly generated points. A horizontal brush initially selects a range, highlighting points within it in red with a brown stroke. The example uses d3.brushX to define the brush and handles the brush event to update the selection state. Clicking re-centers the brush using a fixed width, demonstrating interactive selection on an SVG rendered with d3.scaleLinear and d3.axisBottom.

MMorganhaoyu

84% match

Brush Snapping II

A time-series brush snaps selections to day boundaries on a date axis. The visualization uses a D3 v4 SVG chart with a horizontal brush, where brushing fires a *brush* event that rounds the selection’s start and end dates to the nearest day. The code uses `d3.brushX` with an `.on("brush")` listener, `d3.event.selection.map(x.invert)`, `d3.timeDay.round`, and `d3.select(this).call(d3.event.target.move, …)` to adjust the brush’s extent. The axis grid highlights hourly ticks with reduced opacity.

82% match

Brush Handles

This example shows a scatterplot of 800 random points on a linear x-scale, with a draggable d3.brushX selection. Custom semicircular path handles are attached to the brush’s west and east edges, letting users resize the selection by dragging these visible arcs instead of the invisible brush boundary. The brushmoved handler updates the handle positions and highlights points inside the selected range. It uses d3.brushX, d3.axisBottom, d3.randomNormal, and d3.arc for the handle shapes, rendering to SVG.

Click-to-Recenter Brush II

A scatterplot of 800 points uses a horizontal brush to highlight selections in red. Clicking the background recenters the brush around the cursor, using `d3.brushX` with a fixed width, while a `brushended` handler snaps the brush extent to integer values on the x-axis via `Math.round` and `brush.move`. The SVG rendering uses `d3.scaleLinear` for axes and a transition animation on brush movement.

Brush Handles d3v4 II

This example demonstrates a D3 v4 brush with custom resize handles on a scatterplot of 800 random points. The brush selects a horizontal range along the x-axis, highlighting points within the selection by adding an “active” class. Custom path-based handles replace the default brush edges, using a `brushResizePath` function to draw arrow-like grips. The code uses `d3.brushX`, `d3.axisBottom`, and `d3.scaleLinear`, with the brush’s `start`, `brush`, and `end` events driving the highlighting logic via `d3.event.selection`.

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Brush Handles

This example shows an 800-point scatterplot with a draggable, visible brush handle range selection. The brush is rendered as two semi-circular handles on either side of the selection extent, which the user can drag to resize the range. The code extends `d3.brushX` with custom `path` elements and uses `d3.arc` to define their shapes. When the brush moves, a `brushmoved` function updates the handle positions and highlights the selected circles by toggling an "active" class, which changes their fill opacity.

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