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Improve scroll wheel zoom

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Signed-off-by: Justin Georgi <justin.georgi@gmail.com>
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Justin Georgi
2024-09-24 20:59:55 -07:00
parent 04730ed0a6
commit 8950345975
1 changed files with 6 additions and 8 deletions
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14
src/pages/detect.vue
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@@ -627,17 +627,15 @@
} }
}, },
spinWheel(event) { spinWheel(event) {
let zoomFactor
if (event.wheelDelta > 0) { if (event.wheelDelta > 0) {
let scaleChange = this.canvasZoom * .05 zoomFactor = 1.05
this.canvasZoom *= 1.05
this.canvasOffset.x += -(event.offsetX * scaleChange)
this.canvasOffset.y += -(event.offsetY * scaleChange)
} else if (event.wheelDelta < 0) { } else if (event.wheelDelta < 0) {
let scaleChange = this.canvasZoom * (1 / 1.05 - 1) zoomFactor = 1 / 1.05
this.canvasZoom /= 1.05
this.canvasOffset.x += -(event.offsetX * scaleChange)
this.canvasOffset.y += -(event.offsetY * scaleChange)
} }
this.canvasZoom *= zoomFactor
this.canvasOffset.x = event.offsetX * (1 - zoomFactor) + this.canvasOffset.x * zoomFactor
this.canvasOffset.y = event.offsetY * (1 - zoomFactor) + this.canvasOffset.y * zoomFactor
this.selectChip("redraw") this.selectChip("redraw")
}, },
resetZoom() { resetZoom() {