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Add zoom controls to the research maps - #336
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Zoom in, out and reset buttons, drag to pan once zoomed, and ctrl/pinch wheel to zoom at the cursor, by moving the SVG's viewBox. Pins and lines scale back by 1/zoom so they keep their size. The controls are hidden until the script runs. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Preview: https://15d01c51.nstarkman-space.pages.dev Built from |
… in calc() keeps the pins r:calc(3 * var(--k)) is a unitless number; a browser that does not take that for r makes the whole declaration invalid at computed-value time, which resets r to 0 and hides every pin. calc(3px * var(--k)) is a length everywhere. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Changing code or schema
What and why: The two world maps on /research/ (collaborators, conferences) were fixed at world scale, where the dozens of pins around Boston, New York and Europe sit on top of each other. This adds zoom.
src/lib/mapzoom.jsmoves the SVG'sviewBox, keeping the aspect ratio, so the figure's height never changes and nothing below it jumps. Up to 8×.--k(= 1/zoom) inmap.css, so they stay the same size on screen instead of growing into blobs.hiddenin the markup and shown by the script, so with JavaScript off the page is unchanged. A drag that moved is not treated as a click on the pin it ended over.tests/mapzoom.test.jscovers the view maths (clamping to the map, zoom about the cursor, zoom limits). Driven in a browser: zoom, pan, wheel, reset, pin sizes and clicking a pin all behave.Not included: two-finger pinch on touch screens (the page's own pinch-zoom still works) and keyboard panning; the buttons are keyboard-reachable.
npm testpasseslink.relortypeadded; no schema changeScreenshots
The collaborator map on /research/ — with JavaScript off the map is unchanged; with it on, here zoomed to the eastern US and Europe.
JavaScript off
JavaScript on, zoomed
🤖 Generated with Claude Code