Add icon to settings that can only be set globally (for all extruders)

CURA-1758

plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml

@@ -181,6 +181,7 @@ Item {
                     onLoaded: {
                         settingLoader.item.showRevertButton = false
                         settingLoader.item.showInheritButton = false
+                        settingLoader.item.showLinkedSettingIcon = false
                         settingLoader.item.doDepthIndentation = false
                     }
 

resources/qml/Settings/SettingItem.qml

@@ -21,10 +21,12 @@ Item {
 
     property var showRevertButton: true
     property var showInheritButton: true
+    property var showLinkedSettingIcon: true
     property var doDepthIndentation: true
 
     // 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 stackLevels: propertyProvider.stackLevels
     property var stackLevel: stackLevels[0]
 
@@ -131,6 +133,26 @@ Item {
                 verticalCenter: parent.verticalCenter
             }
 
+            UM.SimpleButton
+            {
+                id: linkedSettingIcon;
+
+                visible: base.settablePerExtruder != "True" && base.showLinkedSettingIcon
+
+                height: parent.height;
+                width: height;
+
+                backgroundColor: UM.Theme.getColor("setting_control");
+                hoverBackgroundColor: UM.Theme.getColor("setting_control")
+                color: UM.Theme.getColor("setting_control_button")
+                hoverColor: UM.Theme.getColor("setting_control_button")
+
+                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")) }
+                onExited: base.showTooltip(base.tooltipText);
+            }
+
             UM.SimpleButton
             {
                 id: revertButton;
@@ -231,7 +253,6 @@ Item {
                 onEntered: { hoverTimer.stop(); base.showTooltip(catalog.i18nc("@label", "This setting is normally calculated, but it currently has an absolute value set.\n\nClick to restore the calculated value.")) }
                 onExited: base.showTooltip(base.tooltipText);
             }
-
         }
 
         Item

resources/qml/Settings/SettingView.qml

@@ -95,7 +95,7 @@ ScrollView
 
                 containerStackId: ExtruderManager.activeExtruderStackId ? ExtruderManager.activeExtruderStackId : Cura.MachineManager.activeMachineId
                 key: model.key ? model.key : ""
-                watchedProperties: [ "value", "enabled", "state", "validationState" ]
+                watchedProperties: [ "value", "enabled", "state", "validationState", "settable_per_extruder" ]
                 storeIndex: 0
             }
 

resources/themes/cura/icons/link.svg

@@ -0,0 +1,43 @@
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+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.2"
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+   viewBox="0 0 250 250"
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+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
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+     id="defs4190" /><sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1148"
+     id="namedview4188"
+     showgrid="false"
+     inkscape:zoom="0.58272057"
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