Shrink dock panel tabs proportionally in case of overflow

src/appshell/qml/dockwindow/DockFrame.qml

@@ -151,11 +151,29 @@ Rectangle {
             currentIndex: tabsPanel.currentIndex
             model: frameModel.tabs
 
+            readonly property real implicitWidthOfActiveTab: currentItem ? currentItem.implicitWidth : 0
+            readonly property real implicitWidthOfAllTabsTogether: {
+                let result = 0
+                for (let i = 0; i < count; i++) {
+                    let item = itemAtIndex(i)
+                    if (item) {
+                        result += item.implicitWidth
+                    }
+                }
+                return result
+            }
+
             delegate: DockPanelTab {
                 text: modelData.title
                 isCurrent: tabsPanel && (tabsPanel.currentIndex === model.index)
                 contextMenuModel: modelData.contextMenuModel
 
+                width: isCurrent
+                       ? implicitWidth
+                       : Math.min((tabsPanel.width + 1 - tabs.implicitWidthOfActiveTab) // +1, because we don't need the rightmost separator
+                                  / (tabs.implicitWidthOfAllTabsTogether - tabs.implicitWidthOfActiveTab),
+                                  1) * implicitWidth
+
                 navigation.name: text
                 navigation.panel: navPanel
                 navigation.order: model.index * 2 // NOTE '...' button will have +1 order

thirdparty/KDDockWidgets/src/private/quick/TabBarQuick.cpp

@@ -124,7 +124,7 @@ QQuickItem *TabBarQuick::listView() const
 
     const QList<QQuickItem *> children = m_tabBarQmlItem->childItems();
     for (QQuickItem *child : children) {
-        if (qstrcmp(child->metaObject()->className(), "QQuickListView") == 0)
+        if (QString::fromUtf8(child->metaObject()->className()).startsWith(QString::fromUtf8("QQuickListView")))
             return child;
     }