feat(bar): implement middle-click action support for Bar Behavior

Assets/Translations/en.json

@@ -842,10 +842,14 @@
       "behavior-wheel-wrap-label": "Wrap around",
       "behavior-workspace-scroll-description": "Choose what the mouse wheel does on empty areas of the bar.",
       "behavior-workspace-scroll-label": "Bar mouse wheel action",
+      "behavior-middle-click-description": "Choose what middle click does on empty areas of the bar.",
+      "behavior-middle-click-label": "Bar middle click action",
+      "behavior-middle-click-follow-mouse-description": "Open the selected middle-click panel at the cursor position.",
+      "behavior-middle-click-follow-mouse-label": "Middle click follow mouse",
       "behavior-right-click-description": "Choose what right click does on empty areas of the bar.",
       "behavior-right-click-label": "Bar right click action",
-      "behavior-right-click-follow-mouse-description": "Open the selected panel at the cursor position.",
-      "behavior-right-click-follow-mouse-label": "Follow mouse position",
+      "behavior-right-click-follow-mouse-description": "Open the selected right-click panel at the cursor position.",
+      "behavior-right-click-follow-mouse-label": "Right click follow mouse",
       "monitor-configure-widgets": "Configure widgets",
       "monitor-override-settings": "Override global settings",
       "monitor-override-settings-description": "Use custom settings for this monitor.",

Assets/settings-default.json

@@ -70,6 +70,8 @@
       ]
     },
     "mouseWheelAction": "none",
+    "middleClickAction": "none",
+    "middleClickFollowMouse": false,
     "rightClickAction": "controlCenter",
     "rightClickFollowMouse": true,
     "reverseScroll": false,

Assets/settings-search-index.json

@@ -377,6 +377,24 @@
     "subTab": 2,
     "subTabLabel": "common.behavior"
   },
+  {
+    "labelKey": "panels.bar.behavior-middle-click-label",
+    "descriptionKey": "panels.bar.behavior-middle-click-description",
+    "widget": "NComboBox",
+    "tab": 4,
+    "tabLabel": "panels.bar.title",
+    "subTab": 2,
+    "subTabLabel": "common.behavior"
+  },
+  {
+    "labelKey": "panels.bar.behavior-middle-click-follow-mouse-label",
+    "descriptionKey": "panels.bar.behavior-middle-click-follow-mouse-description",
+    "widget": "NToggle",
+    "tab": 4,
+    "tabLabel": "panels.bar.title",
+    "subTab": 2,
+    "subTabLabel": "common.behavior"
+  },
   {
     "labelKey": "panels.bar.behavior-right-click-label",
     "descriptionKey": "panels.bar.behavior-right-click-description",

Commons/Settings.qml

@@ -259,6 +259,8 @@ Singleton {
       property string mouseWheelAction: "none"
       property bool reverseScroll: false
       property bool mouseWheelWrap: true
+      property string middleClickAction: "none"
+      property bool middleClickFollowMouse: false
       property string rightClickAction: "controlCenter"
       property bool rightClickFollowMouse: true
       // Per-screen overrides for position and widgets

Modules/Bar/Bar.qml

@@ -336,29 +336,42 @@ Item {
           CompositorService.switchToWorkspace(candidates[next]);
         }
 
+        function handleEmptyBarClick(action, followMouse, mouse) {
+          if (action === "none")
+            return;
+          if (action === "controlCenter") {
+            var controlCenterPanel = PanelService.getPanel("controlCenterPanel", screen);
+            controlCenterPanel?.toggle(null, followMouse ? mapToItem(null, mouse.x, mouse.y) : "ControlCenter");
+            mouse.accepted = true;
+          } else if (action === "settings") {
+            var settingsPanel = PanelService.getPanel("settingsPanel", screen);
+            settingsPanel?.toggle(null, followMouse ? mapToItem(null, mouse.x, mouse.y) : null);
+            mouse.accepted = true;
+          } else if (action === "launcherPanel") {
+            var launcherPanel = PanelService.getPanel("launcherPanel", screen);
+            launcherPanel?.toggle(null, followMouse ? mapToItem(null, mouse.x, mouse.y) : null);
+            mouse.accepted = true;
+          }
+        }
+
         MouseArea {
           anchors.fill: parent
-          acceptedButtons: Qt.RightButton
-          enabled: bar.barRightClickAction !== "none"
+          acceptedButtons: Qt.RightButton | Qt.MiddleButton
+          enabled: bar.barRightClickAction !== "none" || Settings.data.bar.middleClickAction !== "none"
           hoverEnabled: false
           preventStealing: true
           onClicked: mouse => {
                       if (mouse.button === Qt.RightButton) {
                         if (bar.isPointOverWidget(mouse.x, mouse.y))
                           return;
-                        if (bar.barRightClickAction === "controlCenter") {
-                          var controlCenterPanel = PanelService.getPanel("controlCenterPanel", screen);
-                          controlCenterPanel?.toggle(null, Settings.data.bar.rightClickFollowMouse ? mapToItem(null, mouse.x, mouse.y) : "ControlCenter");
-                          mouse.accepted = true;
-                        } else if (bar.barRightClickAction === "settings") {
-                          var settingsPanel = PanelService.getPanel("settingsPanel", screen);
-                          settingsPanel?.toggle(null, Settings.data.bar.rightClickFollowMouse ? mapToItem(null, mouse.x, mouse.y) : null);
-                          mouse.accepted = true;
-                        } else if (bar.barRightClickAction === "launcherPanel") {
-                          var launcherPanel = PanelService.getPanel("launcherPanel", screen);
-                          launcherPanel?.toggle(null, Settings.data.bar.rightClickFollowMouse ? mapToItem(null, mouse.x, mouse.y) : null);
-                          mouse.accepted = true;
-                        }
+                        bar.handleEmptyBarClick(bar.barRightClickAction, Settings.data.bar.rightClickFollowMouse, mouse);
+                        return;
+                      }
+                      if (mouse.button === Qt.MiddleButton) {
+                        if (bar.isPointOverWidget(mouse.x, mouse.y))
+                          return;
+                        bar.handleEmptyBarClick(Settings.data.bar.middleClickAction || "none", Settings.data.bar.middleClickFollowMouse, mouse);
+                        return;
                       }
           }
         }

Modules/Panels/Settings/Tabs/Bar/BehaviorSubTab.qml

@@ -11,6 +11,7 @@ ColumnLayout {
   Layout.fillWidth: true
 
   readonly property string effectiveWheelAction: Settings.data.bar.mouseWheelAction || "none"
+  readonly property string effectiveMiddleClickAction: Settings.data.bar.middleClickAction || "none"
   readonly property string effectiveRightClickAction: Settings.data.bar.rightClickAction || "controlCenter"
 
   NComboBox {
@@ -61,6 +62,43 @@ ColumnLayout {
     visible: Settings.data.bar.mouseWheelAction === "workspace"
   }
 
+  NComboBox {
+    Layout.fillWidth: true
+    label: I18n.tr("panels.bar.behavior-middle-click-label")
+    description: I18n.tr("panels.bar.behavior-middle-click-description")
+    model: [
+      {
+        "key": "none",
+        "name": I18n.tr("common.none")
+      },
+      {
+        "key": "controlCenter",
+        "name": I18n.tr("tooltips.open-control-center")
+      },
+      {
+        "key": "settings",
+        "name": I18n.tr("tooltips.open-settings")
+      },
+      {
+        "key": "launcherPanel",
+        "name": I18n.tr("actions.open-launcher")
+      }
+    ]
+    currentKey: root.effectiveMiddleClickAction
+    defaultValue: Settings.getDefaultValue("bar.middleClickAction")
+    onSelected: key => Settings.data.bar.middleClickAction = key
+  }
+
+  NToggle {
+    Layout.fillWidth: true
+    label: I18n.tr("panels.bar.behavior-middle-click-follow-mouse-label")
+    description: I18n.tr("panels.bar.behavior-middle-click-follow-mouse-description")
+    checked: Settings.data.bar.middleClickFollowMouse
+    defaultValue: Settings.getDefaultValue("bar.middleClickFollowMouse")
+    onToggled: checked => Settings.data.bar.middleClickFollowMouse = checked
+    visible: Settings.data.bar.middleClickAction !== "none" && !(Settings.data.bar.middleClickAction === "settings" && Settings.data.ui.settingsPanelMode === "window")
+  }
+
   NComboBox {
     Layout.fillWidth: true
     label: I18n.tr("panels.bar.behavior-right-click-label")