improvements of wait cursor

make filtering of modal dialogs working with Qt5
save/restore filter flags
don't filter events for File > Export
when using showPreferences don't show wait cursor

src/Gui/Application.cpp

@@ -588,6 +588,7 @@ void Application::importFrom(const char* FileName, const char* DocName, const ch
 void Application::exportTo(const char* FileName, const char* DocName, const char* Module)
 {
     WaitCursor wc;
+    wc.setIgnoreEvents(WaitCursor::NoEvents);
     Base::FileInfo File(FileName);
     std::string te = File.extension();
     string unicodepath = Base::Tools::escapedUnicodeFromUtf8(File.filePath().c_str());

src/Gui/ApplicationPy.cpp

@@ -50,6 +50,7 @@
 #include "View3DInventor.h"
 #include "SplitView3DInventor.h"
 #include "ViewProvider.h"
+#include "WaitCursor.h"
 #include "WidgetFactory.h"
 #include "Workbench.h"
 #include "WorkbenchManager.h"
@@ -1143,7 +1144,10 @@ PyObject* Application::sShowPreferences(PyObject * /*self*/, PyObject *args,PyOb
     Gui::Dialog::DlgPreferencesImp cDlg(getMainWindow());
     if (pstr) 
         cDlg.activateGroupPage(QString::fromUtf8(pstr),idx);
+    WaitCursor wc;
+    wc.restoreCursor();
     cDlg.exec();
+    wc.setWaitCursor();
 
     Py_INCREF(Py_None);
     return Py_None;

src/Gui/WaitCursor.cpp

@@ -32,6 +32,10 @@
 # endif
 #endif
 
+#if QT_VERSION >= 0x050000
+# include <QWindow>
+#endif
+
 #include "WaitCursor.h"
 
 using namespace Gui;
@@ -100,6 +104,13 @@ void WaitCursorP::setIgnoreEvents(WaitCursor::FilterEventsFlags flags)
 bool WaitCursorP::isModalDialog(QObject* o) const
 {
     QWidget* parent = qobject_cast<QWidget*>(o);
+#if QT_VERSION >= 0x050000
+    if (!parent) {
+        QWindow* window = qobject_cast<QWindow*>(o);
+        if (window)
+            parent = QWidget::find(window->winId());
+    }
+#endif
     while (parent) {
         QMessageBox* dlg = qobject_cast<QMessageBox*>(parent);
         if (dlg && dlg->isModal())
@@ -144,6 +155,7 @@ WaitCursor::WaitCursor()
 {
     if (instances++ == 0)
         setWaitCursor();
+    filter = WaitCursorP::getInstance()->ignoreEvents();
 }
 
 /** Restores the last cursor again. */
@@ -151,6 +163,7 @@ WaitCursor::~WaitCursor()
 {
     if (--instances == 0)
         restoreCursor();
+    WaitCursorP::getInstance()->setIgnoreEvents(filter);
 }
 
 /**

src/Gui/WaitCursor.h

@@ -78,6 +78,7 @@ public:
     void setIgnoreEvents(FilterEventsFlags flags = AllEvents);
 
 private:
+    FilterEventsFlags filter;
     static int instances;
 };