Drag Multiples

100%

Drag Multiples

✓ Published0🌍 Public

Last edited Feb 9, 2016

Created on Jan 3, 2012

A grid of sixteen small SVG circles, each in its own separate SVG element, can be dragged independently within the bounds of its cell. The example demonstrates the `d3.behavior.drag` API, using its `origin` accessor and `drag` event to update circle positions. Each circle is constrained to its local coordinate space, with position clamped between the radius and the SVG width or height. The code uses d3.v3 and renders the visuals as SVG, with the data derived from a static array of sixteen identical starting points.

AI-generated description

gpl-3.0 Licensed

Similar vizzes

Loading thumbnail…

Drag Multiples

Sixteen identical SVG panels each display a gray circle that a viewer can drag within the panel’s boundaries. The circles are initially centered and constrained by the panel’s dimensions and the circle’s radius. The d3.behavior.drag() API handles the drag interaction, updating each circle’s cx and cy attributes based on the mouse event’s x and y positions. The code uses d3.select and d3.range to create the panels and data objects, with d3.event providing the current pointer coordinates.

GGerHobbelt

87% match

Loading thumbnail…

Circle Dragging I

This example shows a set of colored circles scattered across an SVG canvas, which users can drag with the mouse. Each circle’s position is stored as x and y properties in its data object, and those values update live during the drag. The code uses d3.select and d3.drag from the d3-drag module to handle the interaction, attaching event handlers for start, drag, and end. At drag start, the circle is raised to the foreground with `.raise()` and gets a black stroke via the `.active` class; the stroke is removed on release. The circles are rendered as SVG `<circle>` elements, colored with a categorical scheme from `d3.scaleOrdinal` and `d3.schemeCategory20`, with random initial positions computed from the SVG’s dimensions.

Mmbostock

83% match

Loading thumbnail…

Drag circles

Five colored circles are positioned in a row on an 800×480 SVG canvas, each with a radius of 60 pixels. The example demonstrates a basic drag-and-drop interaction using D3.js v4, where users can move any circle freely by clicking and dragging it. The circles change cursor to a move icon on hover and gain a black outline while being dragged. The code uses `d3.drag()` with `dragstarted`, `dragged`, and `dragended` handlers, along with `d3.scaleOrdinal` and `d3.schemeCategory20` for coloring, and `d3.select(this).raise()` to bring the active circle to the front.

EEfratVil

82% match

Loading thumbnail…

Multitouch Drag

Twenty colored circles move freely over a full-window SVG canvas. Each circle is draggable with a multitouch pointer, and its position updates live to follow the finger. The code uses `d3.behavior.drag` with `dragstart`, `drag`, and `dragend` handlers to manage interaction, while `d3.select` and `.transition().ease("elastic")` animate the radius from 32 to 48 pixels on grab and back on release. Random starting coordinates come from `d3.range(20).map()`.

Mmbostock

81% match

Loading thumbnail…

Circle Dragging IV

This example demonstrates an improved method for dragging SVG circles, where the circle nearest to the pointer is selected for interaction rather than the topmost one. A Voronoi overlay, computed with `d3.voronoi`, is used for hit-testing, with its cells rendered as light-gray paths. Each circle is clipped to its corresponding Voronoi cell using a `clipPath`. During a drag, the `dragged` function updates the circle’s position and recalculates the Voronoi polygons. The code uses `d3.drag` for the interaction and `d3.scaleOrdinal` with `d3.schemeCategory20` for automatic circle colors.

Mmbostock

80% match

Loading thumbnail…

Drag & Zoom II

This example demonstrates a zoomable SVG canvas containing two thousand circles arranged in a phyllotaxis pattern, where users can click and drag on the background to pan the view or drag individual circles to reposition them. The visualization combines d3-drag and d3-zoom, using the `d3.zoomIdentity` transform to update the group’s `transform` attribute during zooming, while the drag handler updates each circle’s `cx` and `cy` attributes directly. Rendering relies on SVG’s built-in hit-testing and coordinate transformation, avoiding the need for manual redraws or complex event logic.

Mmbostock

80% match

Loading thumbnail…

Drag + Zoom

In this example, dots loaded from a TSV file are positioned in an SVG scatterplot with a light grid. Users can drag individual circles to move them, while clicking and dragging on the background pans the view, and the mousewheel zooms the entire scene. The code combines `d3.behavior.drag` and `d3.behavior.zoom`, using `stopPropagation` in the dragstarted handler to give dragging precedence over panning. Both behaviors update the container's transform attribute via the zoom event's translate and scale values, with dragged circles updating their cx and cy attributes.

Mmbostock

79% match

Loading thumbnail…

Click vs. (a great deal of) Drag(ging)

Twenty colored circles are rendered in an SVG, where each circle can be either clicked or dragged. A click triggers a two-step radius animation (expanding to 64, then shrinking back to 32), while dragging moves the circle and, once the drag exceeds a small threshold, brings the circle to the front using `raise()` and adds an active class. The example uses D3 v4’s `d3.drag()` with `.clickDistance(4)` to distinguish clicks from drags, alongside manual checks on `sourceEvent` coordinates to handle edge cases where the drag ends near the start point. Data is generated randomly as an array of 20 `{x, y}` objects, with colors assigned via `d3.scaleOrdinal` and `d3.schemeCategory20`.

HHerst

79% match