Brush Handles d3v4 II

Brush Handles d3v4 II

This example demonstrates d3-brush with custom resize handles in D3 v4, highlighting the brush selection over a scatterplot of 800 random points. It shows how brushed points become highlighted with a red stroke, while custom path-based handles render on the left and right edges of the selection. The implementation uses d3.brushX, d3.scaleLinear, and d3.axisBottom, with the handle path defined via a custom function resembling the crossfilter approach. The brush’s start and brush events trigger the brushmoved function, which updates point activity and handle positioning based on the current selection.

PPhilippe Rivière

95% match

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.

FFrissAnalytics

92% 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.

91% match

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.

Customization of bush handler

This example shows an interactive scatterplot of 800 random data points, where a brush control selects a range along the x-axis and highlights the corresponding circles in red. The brush’s resize handles are customized with triangular SVG paths, generated by a `triangleData` function that computes relative path coordinates for the `d` attribute, using D3 v3’s `d3.svg.brush`, `d3.scale.linear`, and `d3.svg.axis`. The static SVG rendering relies on a fixed viewport with margins and translucent styling for the brush extent and selected circles.

11Cr18Ni9

Brush Snapping III

This example shows three clusters of 300 normally distributed points each, colored by cluster using `d3.schemeCategory10`, with visible x- and y-axes. A horizontal brush, created with `d3.brushX`, snaps its selection to integer coordinates on the x-axis. During a brush drag, the code maps the selection back to data space, rounds the values, and uses `d3.event.target.move` to reposition the brush, ensuring the selection always covers a complete unit interval.

Brush Slider Test

This example demonstrates a brush-style slider that filters a numeric range, displaying the selected minimum and maximum values as text above the axis. Rendered as SVG, it uses D3 v4’s `d3.brushX()` to create the interactive selection and `d3.brushSelection` to read the current range. The x-axis is generated with `d3.axisBottom` and a linear scale, with the brush initially positioned between 20 and 50 via `brush.move`. The code also notes key API changes from D3 v3 to v4, such as handling brush extents on the brushed element.

FFrissAnalytics

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.