refs #512, GUI improvements

* menu widget to correct margin
* optimized stylesheet by adding dynamic properties for CDockWidget widgets (allows better qss selection)

src/blackgui/components/marginsinput.h

@@ -0,0 +1,59 @@
+/* Copyright (C) 2016
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_COMPONENTS_MARGINSINPUT_H
+#define BLACKGUI_COMPONENTS_MARGINSINPUT_H
+
+#include <QFrame>
+#include <QMargins>
+#include <QScopedPointer>
+
+namespace Ui { class CMarginsInput; }
+
+namespace BlackGui
+{
+    namespace Components
+    {
+        /*!
+         * Widget alows to enter margins
+         */
+        class CMarginsInput : public QFrame
+        {
+            Q_OBJECT
+
+        public:
+            //! Constructor
+            explicit CMarginsInput(QWidget *parent = nullptr);
+
+            //! Destructor
+            ~CMarginsInput();
+
+            //! Set margins
+            void setMargins(const QMargins &margins);
+
+            //! Current values of margins
+            QMargins getMargins() const;
+
+        signals:
+            //! Margins changed
+            void changedMargins(const QMargins &margins);
+
+        private slots:
+            //! Ok
+            void ps_Confirmed();
+
+        private:
+            QScopedPointer<Ui::CMarginsInput> ui;
+        };
+    } // ns
+} // ns
+
+#endif // guard