+ unify DLL export defines to namespace names

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5000 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d

src/Gui/WaitCursor.cpp

@@ -0,0 +1,150 @@
+/***************************************************************************
+ *   Copyright (c) 2004 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  is distributed in the hope that it will be useful,      *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "PreCompiled.h"
+
+#ifndef _PreComp_
+# include <qapplication.h>
+# include <qdatetime.h>
+# ifdef FC_OS_WIN32
+#   include <windows.h>
+# endif
+#endif
+
+#include "WaitCursor.h"
+
+using namespace Gui;
+
+namespace Gui {
+class WaitCursorP : public QObject
+{
+public:
+    static WaitCursorP* getInstance();
+    void setBusy(bool);
+    void setIgnoreEvents(WaitCursor::FilterEventsFlags flags);
+
+protected:
+    bool eventFilter(QObject*, QEvent*);
+
+private:
+    WaitCursorP(); // Disable constructor
+    static WaitCursorP* _instance;
+    bool isOn;
+    WaitCursor::FilterEventsFlags flags;
+};
+} // namespace Gui
+
+WaitCursorP* WaitCursorP::_instance = 0;
+
+WaitCursorP::WaitCursorP() : QObject(0), isOn(false), flags(WaitCursor::AllEvents)
+{
+}
+
+WaitCursorP* WaitCursorP::getInstance()
+{
+    if (!_instance)
+        _instance = new WaitCursorP();
+    return _instance;
+}
+
+void WaitCursorP::setBusy(bool on)
+{
+    if (on == this->isOn)
+        return;
+
+    if (on) {
+        qApp->installEventFilter(this);
+        QApplication::setOverrideCursor(Qt::WaitCursor);
+    }
+    else {
+        qApp->removeEventFilter(this);
+        QApplication::restoreOverrideCursor();
+    }
+
+    this->isOn = on;
+}
+
+void WaitCursorP::setIgnoreEvents(WaitCursor::FilterEventsFlags flags)
+{
+    this->flags = flags;
+}
+
+bool WaitCursorP::eventFilter(QObject*, QEvent* e)
+{
+    // Note: This might cause problems when we want to open a modal dialog at the lifetime 
+    // of a WaitCursor instance because the incoming events are still filtered.
+    if (e->type() == QEvent::KeyPress ||
+        e->type() == QEvent::KeyRelease) {
+        if (this->flags & WaitCursor::KeyEvents)
+            return true;
+    }
+    if (e->type() == QEvent::MouseButtonPress ||
+        e->type() == QEvent::MouseButtonRelease ||
+        e->type() == QEvent::MouseButtonDblClick) {
+        if (this->flags & WaitCursor::MouseEvents)
+            return true;
+    }
+    return false;
+}
+
+int WaitCursor::instances = 0;
+
+/**
+ * Constructs this object and shows the wait cursor immediately. If you need to open a dialog as 
+ * long as an instance of WaitCursor exists you must call restoreCursor() before and setWaitCursor() 
+ * afterwards because all key events and mouse button events are filtered, otherwise you will run
+ * into strange behaviour.
+ */
+WaitCursor::WaitCursor()
+{
+    if (instances++ == 0)
+        setWaitCursor();
+}
+
+/** Restores the last cursor again. */
+WaitCursor::~WaitCursor()
+{
+    if (--instances == 0)
+        restoreCursor();
+}
+
+/**
+ * Sets the wait cursor if needed.
+ */
+void WaitCursor::setWaitCursor()
+{
+    WaitCursorP::getInstance()->setBusy(true);
+}
+
+/**
+ * Restores the last cursor if needed.
+ */
+void WaitCursor::restoreCursor()
+{
+    WaitCursorP::getInstance()->setBusy(false);
+}
+
+void WaitCursor::setIgnoreEvents(FilterEventsFlags flags)
+{
+    WaitCursorP::getInstance()->setIgnoreEvents(flags);
+}