graflow: disabled attribute

bzGraflow.js

@@ -98,6 +98,28 @@ class BZgraflow extends Buildoz{
         else this.initFlow()
     }
 
+    static get observedAttributes(){ 
+        return([...super.observedAttributes, 'disabled'])
+    }
+
+    attributeChangedCallback(name, oldValue, newValue) {
+        super.attributeChangedCallback(name, oldValue, newValue)
+        if(name == 'disabled'){
+            if(newValue === null) {
+                this.disabled = false
+                this.style.opacity = 1
+                this.style.pointerEvents = 'auto'
+            } else {
+                this.disabled = true
+                this.style.opacity = 0.5
+                this.style.pointerEvents = 'none'
+            }
+            this.querySelectorAll('.bzgf-zoom-in, .bzgf-zoom-out').forEach((btn) => {
+                btn.disabled = this.disabled
+            })
+        }
+    }
+
     error(msg, err){
         this.querySelector('.graflow-error')?.remove()
         const errorEl = document.createElement('div')
@@ -227,6 +249,7 @@ class BZgraflow extends Buildoz{
     }
 
     enterSubflow(id){
+        if(this.disabled || this.hasAttribute('disabled')) return
         const nodeEl = this.stagedNodes[id]
         if(!nodeEl) return