Graflow: fixed autofit

bzGraflow.js

@@ -1195,15 +1195,45 @@ class BZgraflow extends Buildoz{
     }
 
     autofit(percent=100){ 
+        if(!this.parentElement) return
+
+        const prevTransformOrigin = this.style.transformOrigin
+        this.style.transform = 'none'
+        this.style.transformOrigin = 'top left'
+
+        // Measure real content by unioning viewport-space bounding boxes.
+        // This is robust with overflow:auto and absolute-positioned layers.
+        let left = Infinity
+        let top = Infinity
+        let right = -Infinity
+        let bottom = -Infinity
+
+        const includeBB = (bb) => {
+            if(!bb) return
+            left = Math.min(left, bb.left)
+            top = Math.min(top, bb.top)
+            right = Math.max(right, bb.right)
+            bottom = Math.max(bottom, bb.bottom)
+        }
+
+        this.nodesContainer?.querySelectorAll?.('.bzgf-node').forEach(nodeEl => includeBB(nodeEl.getBoundingClientRect()))
+        this.wiresContainer?.querySelectorAll?.('path.bzgf-wire').forEach(path => includeBB(path.getBoundingClientRect()))
+
         const parentBB = this.parentElement.getBoundingClientRect()
-        // Use scroll dimensions for actual content extent (nodes can extend beyond element bounds)
+        const gapx = parseInt(this.getBZAttribute('gapx')) || 80
-        const contentW = Math.max(this.scrollWidth || this.offsetWidth || 1, 1)
+        const gapy = parseInt(this.getBZAttribute('gapy')) || 80
-        const contentH = Math.max(this.scrollHeight || this.offsetHeight || 1, 1)
+        const rawW = Number.isFinite(left) && Number.isFinite(right) ? Math.max(right - left, 1) : Math.max(this.mainContainer?.clientWidth || this.offsetWidth || 1, 1)
+        const rawH = Number.isFinite(top) && Number.isFinite(bottom) ? Math.max(bottom - top, 1) : Math.max(this.mainContainer?.clientHeight || this.offsetHeight || 1, 1)
+        const contentW = rawW + (2 * gapx)
+        const contentH = rawH + (2 * gapy)
         const sx = parentBB.width / contentW
         const sy = parentBB.height / contentH
         const scale = Math.min(sx, sy)*(percent/100)  // uniform scale to fit inside parent
-        this.style.transformOrigin = 'top left'
+        const tx = Number.isFinite(left) ? (-left + gapx) : gapx
-        this.style.transform = `scale(${scale})`
+        const ty = Number.isFinite(top) ? (-top + gapy) : gapy
+        this.style.transformOrigin = prevTransformOrigin || 'top left'
+        // First normalize content origin to (0,0), then scale to fit.
+        this.style.transform = `scale(${scale}) translate(${tx}px, ${ty}px)`
     }
 }
 Buildoz.define('graflow', BZgraflow)

graflow_examples/test4.html

@@ -110,7 +110,7 @@
                 ro.observe(el)
 
                 let aifmi = null; let sidx=0;
-                const sevanimation = () => { console.log('sevanimation')
+                const sevanimation = () => { 
                     severities.forEach(severity => aifmi.removeAttribute(severity))
                     aifmi.setAttribute(severities[sidx], '')
                     sidx++