Notes
There are two separate SVG elements on the page:
Each SVG lies within a div, named after its purpose (div#main and div#mini)
The main SVG is nested within another SVG (svg.aperture)
Use CSS to size the SVGs appropriately on the page
About widths and heights:
width and height attributes
svg#butterflysvg.aperture), so that the viewport of that main svg is defined.
svg.aperture constant on the page, while its viewBox string changes (this method uses that viewBox string to zoom and translate).flex-grow: 3 for the main SVG and flex-grow: 1 for the minimap will ensure that the main is 3 times as large as the minimap on screen. The two SVGs might still have identical width and height attributes.viewBox attribute the magnifying SVG (svg.aperture)
viewBox is the string of the form "<min-x> <min-y> width height" so we get "0 0 400 250"viewBox is also applied to the minimap SVGsvg.aperture is due to its preserveAspectRatio attribute being none
svg#butterfly (which is contained within svg.aperture) will stretch to fit its parent (svg.aperture), regardless of width:height ratioRendering the SVG twice
id attribute. This is required for this technique to work.<use xlink:href="#butterfly">
Zoom behavior
svg.aperture and the minimap SVG.
x, y and k values
__zoom property on the minimap.__zoom property for the main and minimap SVGs__zoom property on each, we ensure that both SVGs have the same zoom values at all times.Links
Built with blockbuilder.org
forked from seemantk's block: "Minimap" Zoom/Pan with viewBox
xxxxxxxxxx<head> <meta charset="utf-8"> <link rel="stylesheet" href="style.css" /></head><body><section class="vis"> <div id="main"> <svg class="aperture" width="400" height="250" viewBox="0 0 400 250" preserveAspectRatio="none"> <svg id="butterfly" width="400" height="250"> <title>Use the mousewheel to zoom in and out.</title> <description>This is a slightly modified version (the addition of this metadata) of a sample that shipped with JASC's WebDraw (www.jasc.com). 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