New experimental InfoLabelWidget to display messages on top of arbitrary viewports

GUI/coregui/Models/FitParameterAbsModel.cpp

@@ -51,7 +51,7 @@ Qt::ItemFlags FitParameterAbsModel::flags(const QModelIndex &index) const
 
     Qt::ItemFlags returnVal = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
     if(SessionItem *item = itemForIndex(index)) {
-        if(item->isEditable()) returnVal |= Qt::ItemIsEditable;
+        if(item->isEditable() && index.column() != 0) returnVal |= Qt::ItemIsEditable;
         if(item->parent()->modelType() == Constants::FitParameterLinkType && index.column() == 0) {
             returnVal |= Qt::ItemIsDragEnabled;
         }

GUI/coregui/Views/FitWidgets/FitParameterWidget.cpp

@@ -28,6 +28,7 @@
 #include "FitModelHelper.h"
 #include "SessionModelDelegate.h"
 #include "CustomEventFilters.h"
+#include "InfoLabelWidget.h"
 #include <QMenu>
 #include <QSignalMapper>
 #include <QTreeView>
@@ -271,6 +272,10 @@ void FitParameterWidget::init_fit_model()
 
     spanParameters();
     connectFitParametersSelection(true);
+
+    InfoLabelWidget *label = new InfoLabelWidget(this);
+    label->setPosition(0, 0);
+
 }
 
 //! Adds to JobItem all fit containers, if necessary.

GUI/coregui/Views/InfoWidgets/InfoLabelWidget.cpp

+// ************************************************************************** //
+//
+//  BornAgain: simulate and fit scattering at grazing incidence
+//
+//! @file      coregui/Views/InfoWidgets/InfoLabelWidget.cpp
+//! @brief     Implements class InfoLabelWidget
+//!
+//! @homepage  http://www.bornagainproject.org
+//! @license   GNU General Public License v3 or higher (see COPYING)
+//! @copyright Forschungszentrum Jülich GmbH 2016
+//! @authors   Scientific Computing Group at MLZ Garching
+//! @authors   Céline Durniak, Marina Ganeva, David Li, Gennady Pospelov
+//! @authors   Walter Van Herck, Joachim Wuttke
+//
+// ************************************************************************** //
+
+#include "InfoLabelWidget.h"
+#include <QPainter>
+
+InfoLabelWidget::InfoLabelWidget(QWidget *parent)
+    : QWidget(parent)
+    , m_text("xxx")
+{
+    m_bounding_rect.setWidth(200);
+    m_bounding_rect.setHeight(30);
+}
+
+void InfoLabelWidget::setPosition(int x, int y)
+{
+    setGeometry(x, y, m_bounding_rect.width(), m_bounding_rect.height());
+}
+
+void InfoLabelWidget::paintEvent(QPaintEvent *event)
+{
+    QPainter painter(this);
+    painter.drawText(m_bounding_rect, Qt::AlignCenter, tr("Qt\nProject"));
+}

GUI/coregui/Views/InfoWidgets/InfoLabelWidget.h

+// ************************************************************************** //
+//
+//  BornAgain: simulate and fit scattering at grazing incidence
+//
+//! @file      coregui/Views/InfoWidgets/InfoLabelWidget.h
+//! @brief     Declares class InfoLabelWidget
+//!
+//! @homepage  http://www.bornagainproject.org
+//! @license   GNU General Public License v3 or higher (see COPYING)
+//! @copyright Forschungszentrum Jülich GmbH 2016
+//! @authors   Scientific Computing Group at MLZ Garching
+//! @authors   Céline Durniak, Marina Ganeva, David Li, Gennady Pospelov
+//! @authors   Walter Van Herck, Joachim Wuttke
+//
+// ************************************************************************** //
+
+#ifndef INFOLABELWIDGET_H
+#define INFOLABELWIDGET_H
+
+#include "WinDllMacros.h"
+#include <QWidget>
+#include <QString>
+#include <QRect>
+
+//! The InfoLabelWidget is a semi-transparent overlay label to palce on top of other
+//! widgets outside of any layout context.
+
+class InfoLabelWidget : public QWidget
+{
+public:
+    InfoLabelWidget(QWidget *parent = 0);
+
+    void setPosition(int x, int y);
+
+    void setWarningMessage(const QString &text) {m_text = text;}
+
+protected:
+    void paintEvent(QPaintEvent *event);
+
+private:
+    QString m_text;
+    QRect m_bounding_rect;
+};
+
+#endif

GUI/coregui/Views/InfoWidgets/WarningSignWidget.h

@@ -22,8 +22,6 @@
 #include <QPixmap>
 #include <QString>
 
-class QAbstractScrollArea;
-
 //! The WarningSignWidget is an transparent widget with warning sign pixmap intended to be
 //! overlayed onto other widget at some arbitrary position.
 class WarningSignWidget : public QWidget