ProjectTree: Save state of "Hide Empty Directories" filter

Change-Id: Iafd7248242e95dc0d5205649747f46d98e05873d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/projectexplorer/projectmodels.cpp

@@ -467,6 +467,11 @@ bool FlatModel::generatedFilesFilterEnabled()
     return m_filterGeneratedFiles;
 }
 
+bool FlatModel::trimEmptyDirectoriesEnabled()
+{
+    return m_trimEmptyDirectories;
+}
+
 Node *FlatModel::nodeForIndex(const QModelIndex &index) const
 {
     WrapperNode *flatNode = itemForIndex(index);

src/plugins/projectexplorer/projectmodels.h

@@ -74,6 +74,7 @@ public:
 
     bool projectFilterEnabled();
     bool generatedFilesFilterEnabled();
+    bool trimEmptyDirectoriesEnabled();
     void setProjectFilterEnabled(bool filter);
     void setGeneratedFilesFilterEnabled(bool filter);
     void setTrimEmptyDirectories(bool filter);

src/plugins/projectexplorer/projecttreewidget.cpp

@@ -552,6 +552,11 @@ bool ProjectTreeWidget::generatedFilesFilter()
     return m_model->generatedFilesFilterEnabled();
 }
 
+bool ProjectTreeWidget::trimEmptyDirectoriesFilter()
+{
+    return m_model->trimEmptyDirectoriesEnabled();
+}
+
 bool ProjectTreeWidget::projectFilter()
 {
     return m_model->projectFilterEnabled();
@@ -594,6 +599,7 @@ void ProjectTreeWidgetFactory::saveSettings(QSettings *settings, int position, Q
     const QString baseKey = QLatin1String("ProjectTreeWidget.") + QString::number(position);
     settings->setValue(baseKey + QLatin1String(".ProjectFilter"), ptw->projectFilter());
     settings->setValue(baseKey + QLatin1String(".GeneratedFilter"), ptw->generatedFilesFilter());
+    settings->setValue(baseKey + QLatin1String(".TrimEmptyDirsFilter"), ptw->trimEmptyDirectoriesFilter());
     settings->setValue(baseKey + QLatin1String(".SyncWithEditor"), ptw->autoSynchronization());
 }
 
@@ -604,5 +610,6 @@ void ProjectTreeWidgetFactory::restoreSettings(QSettings *settings, int position
     const QString baseKey = QLatin1String("ProjectTreeWidget.") + QString::number(position);
     ptw->setProjectFilter(settings->value(baseKey + QLatin1String(".ProjectFilter"), false).toBool());
     ptw->setGeneratedFilesFilter(settings->value(baseKey + QLatin1String(".GeneratedFilter"), true).toBool());
+    ptw->setTrimEmptyDirectories(settings->value(baseKey + QLatin1String(".TrimEmptyDirsFilter"), true).toBool());
     ptw->setAutoSynchronization(settings->value(baseKey +  QLatin1String(".SyncWithEditor"), true).toBool());
 }

src/plugins/projectexplorer/projecttreewidget.h

@@ -56,6 +56,7 @@ public:
     void setAutoSynchronization(bool sync);
     bool projectFilter();
     bool generatedFilesFilter();
+    bool trimEmptyDirectoriesFilter();
     QToolButton *toggleSync();
     Node *currentNode();
     void sync(ProjectExplorer::Node *node);