Bed temperature is now either a resolved value or a global value.

Contributes to CURA-2007

cura/CuraApplication.py

@@ -98,6 +98,7 @@ class CuraApplication(QtApplication):
         SettingDefinition.addSupportedProperty("settable_per_meshgroup", DefinitionPropertyType.Any, default = True)
         SettingDefinition.addSupportedProperty("settable_globally", DefinitionPropertyType.Any, default = True)
         SettingDefinition.addSupportedProperty("global_inherits_stack", DefinitionPropertyType.Function, default = "-1")
+        SettingDefinition.addSupportedProperty("resolve", DefinitionPropertyType.Function, default = None)
         SettingDefinition.addSettingType("extruder", None, str, Validator)
 
         SettingFunction.registerOperator("extruderValues", cura.Settings.ExtruderManager.getExtruderValues)

plugins/CuraEngineBackend/StartSliceJob.py

@@ -203,6 +203,12 @@ class StartSliceJob(Job):
         keys = stack.getAllKeys()
         settings = {}
         for key in keys:
+            # Use resolvement value if available, or take the value
+            resolved_value = stack.getProperty(key, "resolve")
+            if resolved_value is not None:
+                settings[key] = resolved_value
+            else:
+                # Normal case
                 settings[key] = stack.getProperty(key, "value")
 
         start_gcode = settings["machine_start_gcode"]

resources/definitions/fdmprinter.def.json

@@ -1089,6 +1089,7 @@
                     "description": "The temperature used for the heated bed. Set at 0 to pre-heat the printer manually.",
                     "unit": "°C",
                     "type": "float",
+                    "resolve": "sum(extruderValues('material_bed_temperature')) / len(extruderValues('material_bed_temperature'))",
                     "default_value": 60,
                     "minimum_value": "0",
                     "maximum_value_warning": "260",

resources/qml/Settings/SettingItem.qml

@@ -28,6 +28,9 @@ Item {
     // Create properties to put property provider stuff in (bindings break in qt 5.5.1 otherwise)
     property var state: propertyProvider.properties.state
     property var settablePerExtruder: propertyProvider.properties.settable_per_extruder
+    property var value: propertyProvider.properties.value
+    property var globalValue: globalPropertyProvider.properties.value
+    property var resolve: propertyProvider.properties.resolve
     property var stackLevels: propertyProvider.stackLevels
     property var stackLevel: stackLevels[0]
 
@@ -150,7 +153,15 @@ Item {
 
                 iconSource: UM.Theme.getIcon("link")
 
-                onEntered: { hoverTimer.stop(); base.showTooltip(catalog.i18nc("@label", "This setting is always shared between all extruders. Changing it here will change the value for all extruders")) }
+                onEntered: {
+                    hoverTimer.stop();
+                    var tooltipText = catalog.i18nc("@label", "This setting is always shared between all extruders. Changing it here will change the value for all extruders") + ".";
+                    if ((resolve != "None") && (globalValue == null)) {
+                        // We come here if a setting has a resolve and the setting is not manually edited.
+                        tooltipText += " " + catalog.i18nc("@label", "The value is resolved from the individual value ") + value + ".";
+                    }
+                    base.showTooltip(tooltipText);
+                }
                 onExited: base.showTooltip(base.tooltipText);
             }
 

resources/qml/Settings/SettingTextField.qml

@@ -106,7 +106,16 @@ SettingItem
             {
                 target: input
                 property: "text"
-                value: propertyProvider.properties.value
+                value:  {
+                    if (propertyProvider.properties.resolve != "None") {
+                        // We have a resolve function. Indicates that the setting is not settable per extruder and that
+                        // we have to choose between the resolved value (default) and the global value
+                        // (if user has explicitly set this).
+                        return (globalPropertyProvider.properties.value != null) ? globalPropertyProvider.properties.value : propertyProvider.properties.resolve;
+                    } else {
+                        return propertyProvider.properties.value;
+                    }
+                }
                 when: !input.activeFocus
             }
         }

resources/qml/Settings/SettingView.qml

@@ -57,6 +57,7 @@ ScrollView
             property var definition: model
             property var settingDefinitionsModel: definitionsModel
             property var propertyProvider: provider
+            property var globalPropertyProvider: inheritStackProvider
 
             //Qt5.4.2 and earlier has a bug where this causes a crash: https://bugreports.qt.io/browse/QTBUG-35989
             //In addition, while it works for 5.5 and higher, the ordering of the actual combo box drop down changes,
@@ -118,7 +119,7 @@ ScrollView
                 id: inheritStackProvider
                 containerStackId: Cura.MachineManager.activeMachineId
                 key: model.key
-                watchedProperties: [ "global_inherits_stack"]
+                watchedProperties: [ "global_inherits_stack", "value" ]
             }
 
             UM.SettingPropertyProvider
@@ -127,7 +128,7 @@ ScrollView
 
                 containerStackId: Cura.MachineManager.activeMachineId
                 key: model.key ? model.key : ""
-                watchedProperties: [ "value", "enabled", "state", "validationState", "settable_per_extruder" ]
+                watchedProperties: [ "value", "enabled", "state", "validationState", "settable_per_extruder", "resolve" ]
                 storeIndex: 0
             }