From 6067c9af0e85361fa2c11e14f362ce701760d4fc Mon Sep 17 00:00:00 2001
From: "Veronica K. B. Olsen" <1619840+vkbo@users.noreply.github.com>
Date: Tue, 8 Sep 2020 23:13:49 +0200
Subject: [PATCH] Middle mouse clicking a document in the tree view opens it
 for viewing

---
 nw/gui/projtree.py | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/nw/gui/projtree.py b/nw/gui/projtree.py
index 2eaf832c..36130b1f 100644
--- a/nw/gui/projtree.py
+++ b/nw/gui/projtree.py
@@ -662,13 +662,28 @@ class GuiProjectTree(QTreeWidget):
 
     def mousePressEvent(self, theEvent):
         """Overload mousePressEvent to clear selection if clicking the
-        mouse in a blank area of the tree view.
+        mouse in a blank area of the tree view, and to load a document
+        for viewing if the suer middle clicked.
         """
         QTreeWidget.mousePressEvent(self, theEvent)
 
-        selItem = self.indexAt(theEvent.pos())
-        if not selItem.isValid():
-            self.clearSelection()
+        if theEvent.button() == Qt.LeftButton:
+            selItem = self.indexAt(theEvent.pos())
+            if not selItem.isValid():
+                self.clearSelection()
+
+        elif theEvent.button() == Qt.MiddleButton:
+            selItem = self.itemAt(theEvent.pos())
+            if not isinstance(selItem, QTreeWidgetItem):
+                return
+
+            tHandle = selItem.data(self.C_NAME, Qt.UserRole)
+            tItem = self.theProject.projTree[tHandle]
+            if tItem is None:
+                return
+
+            if tItem.itemType == nwItemType.FILE:
+                self.theParent.viewDocument(tHandle)
 
         return