From 5765439c7cff4e314a0c5732432bdb7b20e91efd Mon Sep 17 00:00:00 2001
From: Mikaël Capelle <capelle.mikael@gmail.com>
Date: Thu, 7 Jan 2021 19:47:31 +0100
Subject: Alt+Click select/deselect the rows below from a separator.

---
 src/modlistview.cpp | 24 ++++++++++++++++++++++++
 src/modlistview.h   |  1 +
 2 files changed, 25 insertions(+)

(limited to 'src')

diff --git a/src/modlistview.cpp b/src/modlistview.cpp
index 7c67c599..7c770709 100644
--- a/src/modlistview.cpp
+++ b/src/modlistview.cpp
@@ -1311,6 +1311,30 @@ void ModListView::timerEvent(QTimerEvent* event)
   }
 }
 
+void ModListView::mousePressEvent(QMouseEvent* event)
+{
+  // we call the parent class first so that we can use the actual
+  // selection state of the item after
+  QTreeView::mousePressEvent(event);
+
+  const auto index = indexAt(event->pos());
+
+  if (event->isAccepted()
+    && hasCollapsibleSeparators()
+    && index.isValid() && model()->hasChildren(indexAt(event->pos()))
+    && (event->modifiers() & Qt::AltModifier)) {
+
+    const auto flag = selectionModel()->isSelected(index) ?
+      QItemSelectionModel::Select : QItemSelectionModel::Deselect;
+    const bool expanded = isExpanded(index);
+    const QItemSelection selection(
+      model()->index(0, index.column(), index),
+      model()->index(model()->rowCount(index) - 1, index.column(), index));
+    selectionModel()->select(selection, flag | QItemSelectionModel::Rows);
+    setExpanded(index, expanded);
+  }
+}
+
 bool ModListView::event(QEvent* event)
 {
   if (event->type() == QEvent::KeyPress
diff --git a/src/modlistview.h b/src/modlistview.h
index af4e83c0..08ecd935 100644
--- a/src/modlistview.h
+++ b/src/modlistview.h
@@ -161,6 +161,7 @@ protected:
   void dragEnterEvent(QDragEnterEvent* event) override;
   void dragMoveEvent(QDragMoveEvent* event) override;
   void dropEvent(QDropEvent* event) override;
+  void mousePressEvent(QMouseEvent* event) override;
   bool event(QEvent* event) override;
 
 protected slots:
-- 
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