Allow to run workflows with parameter nodes

- fix validation error due to missing min/max
- fix errors due to numbers being passed as string

js/external_tooling_nodes.js

@@ -94,6 +94,11 @@ function valueMatchesType(value, type, options) {
     return typeof value === "string"
 }
 
+function optionalWidgetValue(widgets, index, fallback) {
+    const result = widgets.length > index ? widgets[index].value : null
+    return result === null || result === 0 ? fallback : result
+}
+
 function changeWidgets(node, type, connectedNode, connectedWidget) {
     if (type === "customtext") {
         type = "text"
@@ -110,8 +115,8 @@ function changeWidgets(node, type, connectedNode, connectedWidget) {
         node.widgets[1].value = defaultParameterType(type, connectedNode, connectedWidget)
     }
     const oldDefault = node.widgets.length > 2 ? node.widgets[2].value : connectedWidget.value
-    const oldMin = node.widgets.length > 3 ? node.widgets[3].value : (options?.min ?? 0)
-    const oldMax = node.widgets.length > 4 ? node.widgets[4].value : (options?.max ?? 100)
+    const oldMin = optionalWidgetValue(node.widgets, 3, options?.min ?? 0)
+    const oldMax = optionalWidgetValue(node.widgets, 4, options?.max ?? 100)
     const isDefaultValid = valueMatchesType(oldDefault, type, connectedWidget.options)
     while (node.widgets.length > 2) {
         node.widgets.pop()

krita.py

@@ -204,9 +204,11 @@ class Parameter:
                 "name": ("STRING", {"default": "Parameter"}),
                 "type": (_param_types, {"default": "auto"}),
                 "default": ("STRING", {"default": ""}),
+            },
+            "optional": {
                 "min": ("FLOAT", _any_float),
                 "max": ("FLOAT", _any_float),
-            }
+            },
         }
 
     RETURN_TYPES = (BasicTypes,)
@@ -214,7 +216,11 @@ class Parameter:
     FUNCTION = "placeholder"
     CATEGORY = "krita"
 
-    def placeholder(self, name: str, type: str, default, min, max):
+    def placeholder(self, name: str, type: str, default, min=0.0, max=1.0):
+        if type == "number":
+            return (float(default),)
+        elif type == "number (integer)":
+            return (int(default),)
         return (default,)