Constrained Zoom

Restricted zoom behavior in d3

This example demonstrates restricted zoom behavior in d3.v5, bounding pan and zoom within a rectangular viewport. A field of 300 randomly positioned and sized circles is rendered in an SVG, and users can scroll to zoom up to 50x and drag to pan; when zooming out to the original scale, the view snaps back to the full extent. The implementation uses `d3.zoom()` with a custom `on("zoom")` handler that clamps translation based on viewport dimensions and scale, then updates the `<g>` element’s `transform` attribute, applying the constrained translation and scale.

GGerardoFurtado

85% match

Constrained Zoom

This example displays a world map that users can pan and zoom, with the zoom behavior constrained so the map cannot be moved beyond its edges. The code uses d3.behavior.zoom with a custom zoom event handler that clamps the translation based on the current scale. Geographic data from a TopoJSON file is rendered using d3.geo.path with a Mercator projection, and the map is drawn as SVG paths. The constraint formula adjusts the allowed translation range as the scale changes, preventing the map from leaving the viewport.

82% match

Zoom + Pan

This example demonstrates how to pan and zoom a chart using D3.js v3. It renders an SVG with axes and a filled background rectangle, using linear scales for the x- and y- dimensions. The `d3.behavior.zoom` API links the zoom behavior to the scales, allowing mouse wheel and drag interactions to rescale the axes. When zooming occurs, the axes are redrawn to reflect the updated scale ranges. The code sets a zoom scale extent between 1 and 32, and uses `d3.svg.axis` to produce the tick marks and grid lines.

79% match

Zoom + Pan

This example demonstrates zooming and panning across a 2D Cartesian coordinate system with visible axes. The view initially centers on the origin, and the user can pan by dragging and zoom by scrolling, with the axis tick marks and grid lines updating accordingly. A "Reset" button restores the original scale and translation. The implementation uses d3.behavior.zoom with linear scales for the x and y axes, and calls the axis render functions within the zoom event handler. The SVG rendering includes a light gray background rectangle and white axis strokes.

zoom/pan d3v4 - Full

This example demonstrates how to implement zoom and pan interactions on an SVG canvas. The visualization displays a single green circle centered in the viewport, with the zoom behavior applied directly to the SVG group element. The code uses the D3 v4 zoom API via `d3.zoom().on("zoom", zoomfn)` to handle mouse and touch events, and the zoom function applies the event transform to the group. A circle is rendered at the center using `svg.append("circle")`, and the zoom handler updates the group’s `transform` attribute while also calling `svg.scale(4)`, which scales the entire group by a fixed factor. The SVG fills the browser window.

IIgathi

Zoom + Pan

A zoomable and pannable SVG viewport displays a large grid with axes, controlled by the mouse. The example shows how to programmatically reset the zoom state using a button. It uses d3.behavior.zoom with d3.scale.linear domains, and a transition tween with d3.interpolate to animate the domain reset. The axes and grid are rendered as SVG shapes, and zoomed() rebinds the axes to the updated scales during the transition.

Pan & Zoom IV

Two thousand circles laid out in a phyllotaxis spiral show the d3.zoom behavior applied by directly manipulating each circle’s SVG transform attribute. On every zoom event, the code calls *transform*.applyX and *transform*.applyY to remap the original data coordinates, keeping all circle radii constant at 2.5 pixels while allowing pan and zoom between half and four times the initial scale. This approach, written in d3.v4 with SVG, demonstrates an alternative to scaling a single parent group, trading performance for customization.