From 6bdc3eb29f8324eef6ed6db96e8c3677a989a1bc Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sat, 20 May 2017 21:21:30 +0200
Subject: [PATCH] workaround for broken tree indicators with Qt 5.6 under
 Windows

---
 src/Gui/Application.cpp                       |  17 +++++++++++++++++
 src/Gui/Icons/resource.qrc                    |   2 ++
 src/Gui/Icons/style/windows_branch_closed.png | Bin 0 -> 159 bytes
 src/Gui/Icons/style/windows_branch_open.png   | Bin 0 -> 153 bytes
 4 files changed, 19 insertions(+)
 create mode 100644 src/Gui/Icons/style/windows_branch_closed.png
 create mode 100644 src/Gui/Icons/style/windows_branch_open.png

diff --git a/src/Gui/Application.cpp b/src/Gui/Application.cpp
index 2de7dce685..cece611c68 100644
--- a/src/Gui/Application.cpp
+++ b/src/Gui/Application.cpp
@@ -1780,6 +1780,23 @@ void Application::runApplication(void)
             qApp->sendEvent(&mw, &e);
         }
     }
+#if QT_VERSION == 0x050600 && defined(Q_OS_WIN32)
+    else {
+        // Under Windows the tree indicator branch gets corrupted after a while.
+        // For more details see also https://bugreports.qt.io/browse/QTBUG-52230
+        // and https://codereview.qt-project.org/#/c/154357/2//ALL,unified
+        // A workaround for Qt 5.6.0 is to set a minimal style sheet.
+        QString qss = QString::fromLatin1(
+               "QTreeView::branch:closed:has-children  {\n"
+               "    image: url(:/icons/style/windows_branch_closed.png);\n"
+               "}\n"
+               "\n"
+               "QTreeView::branch:open:has-children  {\n"
+               "    image: url(:/icons/style/windows_branch_open.png);\n"
+               "}\n");
+        qApp->setStyleSheet(qss);
+    }
+#endif
 
     //initialize spaceball.
     mainApp.initSpaceball(&mw);
diff --git a/src/Gui/Icons/resource.qrc b/src/Gui/Icons/resource.qrc
index acbef34ba3..c976aee3aa 100644
--- a/src/Gui/Icons/resource.qrc
+++ b/src/Gui/Icons/resource.qrc
@@ -40,6 +40,8 @@
         <file>ClassBrowser/type_class.svg</file>
         <file>ClassBrowser/type_enum.svg</file>
         <file>ClassBrowser/type_module.svg</file>
+        <file>style/windows_branch_closed.png</file>
+        <file>style/windows_branch_open.png</file>
         <file>Std_ViewScreenShot.svg</file>
         <file>bound-expression.svg</file>
         <file>bound-expression-unset.svg</file>
diff --git a/src/Gui/Icons/style/windows_branch_closed.png b/src/Gui/Icons/style/windows_branch_closed.png
new file mode 100644
index 0000000000000000000000000000000000000000..d13516d3285d0dc91d3d6b034a551de3d8878e5d
GIT binary patch
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literal 0
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diff --git a/src/Gui/Icons/style/windows_branch_open.png b/src/Gui/Icons/style/windows_branch_open.png
new file mode 100644
index 0000000000000000000000000000000000000000..b625caacb7a2f5cb2df790da4a1af0009bc58701
GIT binary patch
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literal 0
HcmV?d00001