+#include <ModelAPI_Feature.h>
+
+#include <QPixmap>
+
+class QWidget;
+class QLayout;
+class QDoubleSpinBox;
+
+namespace ModuleBase_Tools {
+
+/*
+ * Methods to adjust margins and spacings.
+ */
+MODULEBASE_EXPORT void adjustMargins(QWidget* theWidget);
+MODULEBASE_EXPORT void adjustMargins(QLayout* theLayout);
+
+MODULEBASE_EXPORT void zeroMargins(QWidget* theWidget);
+MODULEBASE_EXPORT void zeroMargins(QLayout* theLayout);
+
+
+/**
+ * \ingroup GUI
+ * Methods to modify a resource pixmap
+ */
+
+//! Create composite pixmap.
+//! Pixmap \a theAdditionalIcon is drawn over pixmap \a dest with coordinates
+//! specified relatively to the upper left corner of \a theIcon.
+
+//! \param theAdditionalIcon resource text of the additional pixmap
+//! \param theIcon resource text of the background pixmap
+//! \return resulting pixmap
+MODULEBASE_EXPORT QPixmap composite(const QString& theAdditionalIcon, const QString& theIcon);
+
+//! Generates the pixmap lighter than the resources pixmap.
+//! Pixmap \a theIcon is lighted according to the given value.
+//! If the lighter value is greater than 100, this functions returns a lighter pixmap.
+//! Setting lighter value to 150 returns a color that is 50% brighter. If the factor is less than 100,
+//! the return pixmap is darker. If the factor is 0 or negative, the return pixmap is unspecified.