From 052d8a70e9a4014ea7dc721fb9ba829bc1438cb7 Mon Sep 17 00:00:00 2001
From: Markus Lampert <markus@bibi.ca>
Date: Thu, 6 Sep 2018 11:12:17 -0700
Subject: [PATCH] Added collapse/expand option to the document tree view.

---
 src/Gui/CommandView.cpp | 25 +++++++++++++++++++++++++
 src/Gui/Tree.cpp        |  5 ++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/Gui/CommandView.cpp b/src/Gui/CommandView.cpp
index 07962f6ffb..581924f187 100644
--- a/src/Gui/CommandView.cpp
+++ b/src/Gui/CommandView.cpp
@@ -2861,6 +2861,28 @@ void StdTreeMultiDocument::activated(int iMsg)
 }
 
 
+//===========================================================================
+// Std_TreeCollapseDocument
+//===========================================================================
+DEF_STD_CMD(StdTreeCollapseDocument)
+
+StdTreeCollapseDocument::StdTreeCollapseDocument()
+  : Command("Std_TreeCollapseDocument")
+{
+    sGroup       = QT_TR_NOOP("View");
+    sMenuText    = QT_TR_NOOP("Collapse/Expand");
+    sToolTipText = QT_TR_NOOP("Expand active document and collapse all others");
+    sWhatsThis   = "Std_TreeCollapseDocument";
+    sStatusTip   = QT_TR_NOOP("Expand active document and collapse all others");
+    eType        = 0;
+}
+
+void StdTreeCollapseDocument::activated(int iMsg)
+{
+    Q_UNUSED(iMsg); 
+}
+
+
 //===========================================================================
 // Std_TreeViewDocument
 //===========================================================================
@@ -2880,6 +2902,7 @@ StdTreeViewDocument::StdTreeViewDocument()
     CommandManager &rcCmdMgr = Application::Instance->commandManager();
     rcCmdMgr.addCommand(new StdTreeSingleDocument());
     rcCmdMgr.addCommand(new StdTreeMultiDocument());
+    rcCmdMgr.addCommand(new StdTreeCollapseDocument());
 }
 
 Action * StdTreeViewDocument::createAction(void)
@@ -2891,8 +2914,10 @@ Action * StdTreeViewDocument::createAction(void)
     CommandManager &grp = Application::Instance->commandManager();
     Command* cmd0 = grp.getCommandByName("Std_TreeSingleDocument");
     Command* cmd1 = grp.getCommandByName("Std_TreeMultiDocument");
+    Command* cmd2 = grp.getCommandByName("Std_TreeCollapseDocument");
     cmd0->addToGroup(pcAction, true);
     cmd1->addToGroup(pcAction, true);
+    cmd2->addToGroup(pcAction, true);
 
     return pcAction;
 }
diff --git a/src/Gui/Tree.cpp b/src/Gui/Tree.cpp
index 6dc60fac43..157a7e5c88 100644
--- a/src/Gui/Tree.cpp
+++ b/src/Gui/Tree.cpp
@@ -713,8 +713,11 @@ void TreeWidget::slotActiveDocument(const Gui::Document& Doc)
     {
         QFont f = it->second->font(0);
         f.setBold(it == jt);
-        it->second->setFont(0,f);
+        it->second->setFont(0, f);
         it->second->setHidden(0 == displayMode && it != jt);
+        if (2 == displayMode) {
+            it->second->setExpanded(it == jt);
+        }
     }
 }