From 805c23ddb9ba1ea7bcbd046e70161d1dd0ec3bce Mon Sep 17 00:00:00 2001
From: David Rosca <nowrep@gmail.com>
Date: Fri, 2 Feb 2018 14:25:54 +0100
Subject: [PATCH] VerticalTabs: Expand subtree when new tab is inserted

---
 src/plugins/VerticalTabs/tabtreeview.cpp | 23 +++++++++++++++++++++++
 src/plugins/VerticalTabs/tabtreeview.h   |  2 +-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/plugins/VerticalTabs/tabtreeview.cpp b/src/plugins/VerticalTabs/tabtreeview.cpp
index e187ae6c6..c8c28545c 100644
--- a/src/plugins/VerticalTabs/tabtreeview.cpp
+++ b/src/plugins/VerticalTabs/tabtreeview.cpp
@@ -23,6 +23,7 @@
 #include "webtab.h"
 #include "tabcontextmenu.h"
 
+#include <QTimer>
 #include <QToolTip>
 #include <QHoverEvent>
 
@@ -77,6 +78,28 @@ void TabTreeView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bot
     }
 }
 
+void TabTreeView::rowsInserted(const QModelIndex &parent, int start, int end)
+{
+    QTreeView::rowsInserted(parent, start, end);
+
+    // Parent for WebTab is set after insertTab is emitted
+    const QPersistentModelIndex index = model()->index(start, 0, parent);
+    QTimer::singleShot(0, this, [=]() {
+        if (!index.isValid()) {
+            return;
+        }
+        QModelIndex idx = index;
+        QVector<QModelIndex> stack;
+        do {
+            stack.append(idx);
+            idx = idx.parent();
+        } while (idx.isValid());
+        for (const QModelIndex &index : qAsConst(stack)) {
+            expand(index);
+        }
+    });
+}
+
 bool TabTreeView::viewportEvent(QEvent *event)
 {
     switch (event->type()) {
diff --git a/src/plugins/VerticalTabs/tabtreeview.h b/src/plugins/VerticalTabs/tabtreeview.h
index 186c8c30a..8219b552f 100644
--- a/src/plugins/VerticalTabs/tabtreeview.h
+++ b/src/plugins/VerticalTabs/tabtreeview.h
@@ -36,7 +36,7 @@ private:
     void drawBranches(QPainter *painter, const QRect &rect, const QModelIndex &index) const override;
     void currentChanged(const QModelIndex &current, const QModelIndex &previous) override;
     void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles = QVector<int>()) override;
-
+    void rowsInserted(const QModelIndex &parent, int start, int end) override;
     bool viewportEvent(QEvent *event) override;
 
     enum DelegateButton {