Add a optional search bar to qtResourceBrowser.

The search bar is added and a `QSortFilterProxyModel` is used if
the "SearchBar" flag is set in the configuration attributes.

smtk/extension/qt/ResourcePanelConfiguration.json

@@ -7,7 +7,8 @@
       "Attributes": {
         "Title": "Resources",
         "TopLevel": true,
-        "Widget": "ResourceTree"
+        "Widget": "ResourceTree",
+        "SearchBar": true
       },
       "Children": [
         {

smtk/extension/qt/qtResourceBrowser.cxx

@@ -75,6 +75,7 @@ qtResourceBrowser::qtResourceBrowser(const smtk::view::Information& info)
   QAbstractItemModel* qtPhraseModel = nullptr;
   smtk::view::SelectionPtr selection;
   const auto& view = this->configuration();
+  bool searchBar = false;
   if (view)
   {
     // empty Widget attribute is OK, will use default.
@@ -83,8 +84,10 @@ qtResourceBrowser::qtResourceBrowser(const smtk::view::Information& info)
     phraseModel = manager->phraseModelFactory().createFromConfiguration(view.get());
     qtPhraseModel = new smtk::extension::qtDescriptivePhraseModel;
     selection = this->uiManager()->selection();
+    searchBar = view->details().attributeAsBool("SearchBar");
   }
-  m_p->setup(this, phraseModel, modelViewType, qtPhraseModel, this->parentWidget(), selection);
+  m_p->setup(
+    this, phraseModel, modelViewType, qtPhraseModel, this->parentWidget(), selection, searchBar);
   this->Widget = m_p->m_container;
 }
 

smtk/extension/qt/qtResourceBrowserP.cxx

@@ -18,7 +18,9 @@
 #include "smtk/io/Logger.h"
 
 #include <QAbstractProxyModel>
+#include <QLineEdit>
 #include <QMetaObject>
+#include <QSortFilterProxyModel>
 #include <QTreeView>
 #include <QVBoxLayout>
 
@@ -51,7 +53,8 @@ void qtResourceBrowser::Internal::setup(
   const std::string& viewName,
   QAbstractItemModel* qmodel,
   QWidget* parent,
-  const std::shared_ptr<smtk::view::Selection>& selection)
+  const std::shared_ptr<smtk::view::Selection>& selection,
+  bool searchBar)
 {
   m_self = self;
   if (m_container)
@@ -80,6 +83,19 @@ void qtResourceBrowser::Internal::setup(
   m_container->setObjectName("qtResourceBrowser");
   m_layout = new QVBoxLayout(m_container);
   m_layout->setObjectName("m_layout");
+  if (searchBar)
+  {
+    m_filter = new QSortFilterProxyModel(m_container);
+    m_filter->setFilterCaseSensitivity(Qt::CaseInsensitive);
+    m_filter->setSortCaseSensitivity(Qt::CaseInsensitive);
+
+    m_search = new QLineEdit(m_container);
+    m_search->setObjectName("Search");
+    m_search->setPlaceholderText("Search");
+    m_layout->addWidget(m_search);
+    QObject::connect(
+      m_search, &QLineEdit::textChanged, m_filter, &QSortFilterProxyModel::setFilterWildcard);
+  }
 
   m_view = ctor(parent);
 
@@ -110,7 +126,15 @@ void qtResourceBrowser::Internal::setup(
   m_delegate->setDrawSubtitle(false);
   m_delegate->setSelection(selection); // Used for badge actions
 
-  m_view->setModel(m_model);
+  if (searchBar)
+  {
+    m_filter->setSourceModel(m_model);
+    m_view->setModel(m_filter);
+  }
+  else
+  {
+    m_view->setModel(m_model);
+  }
   m_view->setItemDelegate(m_delegate);
   m_view->setMouseTracking(true); // Needed to receive hover events.
   // Connect signals
@@ -140,7 +164,15 @@ qtDescriptivePhraseModel* qtResourceBrowser::Internal::descriptivePhraseModel()
 void qtResourceBrowser::Internal::setDescriptivePhraseModel(QAbstractItemModel* qmodel)
 {
   m_model = qmodel;
-  m_view->setModel(m_model);
+  if (m_filter)
+  {
+    m_filter->setSourceModel(m_model);
+    m_view->setModel(m_filter);
+  }
+  else
+  {
+    m_view->setModel(m_model);
+  }
   QObject::connect(
     m_view->selectionModel(),
     SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),

smtk/extension/qt/qtResourceBrowserP.h

@@ -19,6 +19,8 @@
 
 class QAbstractItemModel;
 class QAbstractItemView;
+class QLineEdit;
+class QSortFilterProxyModel;
 class QTreeView;
 class QVBoxLayout;
 
@@ -43,7 +45,8 @@ public:
     QAbstractItemModel* qmodel,
     QWidget* parent,
     const std::shared_ptr<smtk::view::Selection>& selection =
-      std::shared_ptr<smtk::view::Selection>());
+      std::shared_ptr<smtk::view::Selection>(),
+    bool searchBar = false);
 
   smtk::extension::qtDescriptivePhraseModel* descriptivePhraseModel() const;
   void setDescriptivePhraseModel(QAbstractItemModel* qmodel);
@@ -66,6 +69,10 @@ public:
   std::string m_viewName;
   std::string m_resourceTreeType; // "default" or specific type.
   int m_resourceTreeStyle{ -1 };  // Which default subphrase generator should be used?
+  /// A proxy model for users to search by name.
+  QPointer<QSortFilterProxyModel> m_filter;
+  /// An optional search bar for users.
+  QPointer<QLineEdit> m_search;
 
   // Set to true when inside sendSMTKSelectionToPanel.
   // Used to avoid updating the SMTK selection from the panel while