New PropertyRepeater for IntensityDataItems to update axes range.

GUI/coregui/Views/FitWidgets/FitComparisonWidget.cpp

@@ -25,6 +25,7 @@
 #include "RealDataItem.h"
 #include "SessionModel.h"
 #include "FitSuiteItem.h"
+#include "PropertyRepeater.h"
 #include <QAction>
 #include <QGridLayout>
 #include <QLabel>
@@ -44,6 +45,7 @@ FitComparisonWidget::FitComparisonWidget(QWidget *parent)
     , m_relativeDiffPlot(new ColorMapCanvas)
     , m_fitFlowWidget(new FitFlowWidget)
     , m_statusLabel(new ColorMapLabel(0, this))
+    , m_repeater(new PropertyRepeater(this))
     , m_relativeDiffItem(0)
     , m_resetViewAction(0)
     , m_tempIntensityDataModel(new SessionModel("TempIntensityDataModel"))
@@ -111,6 +113,9 @@ void FitComparisonWidget::subscribeToItem()
     m_statusLabel->addColorMap(m_realDataPlot);
     m_statusLabel->addColorMap(m_simulatedDataPlot);
     m_statusLabel->addColorMap(m_relativeDiffPlot);
+
+    m_repeater->addItem(realDataItem());
+    m_repeater->addItem(simulatedDataItem());
 }
 
 void FitComparisonWidget::unsubscribeFromItem()
@@ -120,6 +125,8 @@ void FitComparisonWidget::unsubscribeFromItem()
 
     if (simulatedDataItem())
         simulatedDataItem()->mapper()->unsubscribe(this);
+
+    m_repeater->clear();
 }
 
 void FitComparisonWidget::onResetViewAction()

GUI/coregui/Views/FitWidgets/FitComparisonWidget.h

@@ -27,6 +27,7 @@ class SessionModel;
 class FitFlowWidget;
 class ColorMapLabel;
 class QAction;
+class PropertyRepeater;
 
 //! The FitComparisonWidget class plots realdata, simulated data and relative difference map
 //! during the course of the fit.
@@ -63,6 +64,7 @@ private:
     ColorMapCanvas* m_relativeDiffPlot;
     FitFlowWidget* m_fitFlowWidget;
     ColorMapLabel* m_statusLabel;
+    PropertyRepeater* m_repeater;
 
     IntensityDataItem* m_relativeDiffItem;
     QAction* m_resetViewAction;

GUI/coregui/Views/IntensityDataWidgets/PropertyRepeater.cpp

+// ************************************************************************** //
+//
+//  BornAgain: simulate and fit scattering at grazing incidence
+//
+//! @file      GUI/coregui/Views/IntensityDataWidgets/PropertyRepeater.cpp
+//! @brief     Implements class PropertyRepeater
+//!
+//! @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 "PropertyRepeater.h"
+#include "IntensityDataItem.h"
+#include <QDebug>
+
+PropertyRepeater::PropertyRepeater(QObject* parent)
+    : QObject(parent)
+    , m_block_repeater(false)
+{
+
+}
+
+void PropertyRepeater::addItem(IntensityDataItem* intensityItem)
+{
+    if (!intensityItem || m_dataItems.contains(intensityItem))
+        return;
+
+
+    intensityItem->mapper()->setOnItemDestroy([this](SessionItem* item)
+    {
+        m_dataItems.removeAll(item);
+    }, this);
+
+    intensityItem->mapper()->setOnPropertyChange(
+        [this](const QString& name) { onPropertyChanged(name); }, this);
+
+    intensityItem->mapper()->setOnChildPropertyChange(
+        [this](SessionItem* item, const QString name) {
+            setOnChildPropertyChange(item, name);
+        }, this);
+
+
+    m_dataItems.push_back(intensityItem);
+}
+
+void PropertyRepeater::clear()
+{
+    for (auto item : m_dataItems)
+        item->mapper()->unsubscribe(this);
+
+    m_dataItems.clear();
+}
+
+void PropertyRepeater::onPropertyChanged(const QString& propertyName)
+{
+    if (m_block_repeater)
+        return;
+
+    m_block_repeater = true;
+
+    Q_UNUSED(propertyName);
+
+    m_block_repeater = false;
+}
+
+void PropertyRepeater::setOnChildPropertyChange(SessionItem* item, const QString& propertyName)
+{
+    if (m_block_repeater)
+        return;
+
+    m_block_repeater = true;
+
+    SessionItem* sourceItem = item->parent();
+    QString tag = sourceItem->tagFromItem(item);
+    QVariant value = item->getItemValue(propertyName);
+
+    qDebug() << "PropertyRepeater: " << item << item->modelType() << item->itemName()
+             << " parent:" << item->parent() << item->parent()->modelType() << item->parent()->itemName()
+             << " propertyName:" << propertyName;
+    qDebug() << "tag:" << tag << m_dataItems.size();
+
+    for (auto target : targetItems(sourceItem))
+        target->getItem(tag)->setItemValue(propertyName, value);
+
+    m_block_repeater = false;
+}
+
+//! Returns list of target items to update their properties.
+
+QVector<SessionItem*> PropertyRepeater::targetItems(SessionItem* sourceItem)
+{
+    QVector<SessionItem*> result = m_dataItems;
+    result.removeAll(sourceItem);
+    return result;
+}

GUI/coregui/Views/IntensityDataWidgets/PropertyRepeater.h

+// ************************************************************************** //
+//
+//  BornAgain: simulate and fit scattering at grazing incidence
+//
+//! @file      GUI/coregui/Views/IntensityDataWidgets/PropertyRepeater.h
+//! @brief     Defines class PropertyRepeater
+//!
+//! @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 PROPERTYREPEATER_H
+#define PROPERTYREPEATER_H
+
+#include "WinDllMacros.h"
+#include <QObject>
+#include <QVector>
+
+class SessionItem;
+class IntensityDataItem;
+
+//! Tracks property change (axes range, units etc) for the collection of IntensityDataItems
+//! and sets same properties for all of them.
+
+class BA_CORE_API_ PropertyRepeater : public QObject
+{
+    Q_OBJECT
+public:
+    explicit PropertyRepeater(QObject* parent = nullptr);
+
+    void addItem(IntensityDataItem* item);
+
+    void clear();
+private:
+    void onPropertyChanged(const QString& propertyName);
+    void setOnChildPropertyChange(SessionItem* item, const QString& propertyName);
+    QVector<SessionItem*> targetItems(SessionItem* sourceItem);
+
+    QVector<SessionItem*> m_dataItems;
+    bool m_block_repeater;
+};
+
+#endif // PROPERTYREPEATER_H