0027398: Integrate Qt Browser Widget to Open CASCADE Technology

[occt.git] / tools / DFBrowser / DFBrowser_TreeLevelView.cxx

diff --git a/tools/DFBrowser/DFBrowser_TreeLevelView.cxx b/tools/DFBrowser/DFBrowser_TreeLevelView.cxx
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+++ b/tools/DFBrowser/DFBrowser_TreeLevelView.cxx
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+// Created on: 2017-06-16
+// Created by: Natalia ERMOLAEVA
+// Copyright (c) 2017 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement. 
+
+#include <DFBrowser_TreeLevelView.hxx>
+
+#include <DFBrowser_Item.hxx>
+#include <DFBrowser_TreeLevelViewModel.hxx>
+#include <DFBrowser_Window.hxx>
+#include <DFBrowserPane_Tools.hxx>
+#include <TreeModel_ModelBase.hxx>
+
+#include <QItemSelectionModel>
+
+#include <QGridLayout>
+#include <QHeaderView>
+#include <QTableView>
+#include <QWidget>
+
+const int DEFAULT_COLUMN_WIDTH = 300;
+
+// =======================================================================
+// function : Constructor
+// purpose :
+// =======================================================================
+DFBrowser_TreeLevelView::DFBrowser_TreeLevelView (QWidget* theParent)
+: QObject (theParent)
+{
+  myMainWindow = new QWidget (theParent);
+  QGridLayout* aLayout = new QGridLayout (myMainWindow);
+  aLayout->setContentsMargins (0, 0, 0, 0);
+
+  myTableView = new QTableView (myMainWindow);
+  myTableView->setModel (new DFBrowser_TreeLevelViewModel (myTableView));
+  myTableView->setColumnWidth (0, DEFAULT_COLUMN_WIDTH);
+  myTableView->setEditTriggers (QAbstractItemView::DoubleClicked);
+  QHeaderView* aVHeader = myTableView->verticalHeader();
+  aVHeader->setVisible (false);
+  aVHeader->setDefaultSectionSize (aVHeader->minimumSectionSize() + DFBrowserPane_Tools::HeaderSectionMargin());
+  myTableView->horizontalHeader()->setStretchLastSection (true);
+  aLayout->addWidget (myTableView);
+
+  QItemSelectionModel* aSelectionModel = new QItemSelectionModel (myTableView->model());
+  myTableView->setSelectionMode (QAbstractItemView::SingleSelection);
+  myTableView->setSelectionModel (aSelectionModel);
+  myTableView->setSelectionBehavior (QAbstractItemView::SelectRows);
+  connect (aSelectionModel, SIGNAL (selectionChanged (const QItemSelection&, const QItemSelection&)),
+           this, SLOT (onTableSelectionChanged (const QItemSelection&, const QItemSelection&)));
+  connect (myTableView, SIGNAL (doubleClicked (const QModelIndex&)),
+           this, SLOT (onTableDoubleClicked (const QModelIndex&)));
+
+  DFBrowser_Window::SetWhiteBackground (myTableView);
+  myTableView->setGridStyle (Qt::NoPen);
+}
+
+// =======================================================================
+// function : clearSelection
+// purpose :
+// =======================================================================
+void DFBrowser_TreeLevelView::ClearSelection()
+{
+  myTableView->selectionModel()->clearSelection();
+}
+
+// =======================================================================
+// function : ProcessItem
+// purpose :
+// =======================================================================
+bool DFBrowser_TreeLevelView::ProcessItem (const QModelIndex& theIndex)
+{
+  bool aResult = false;
+  TreeModel_ItemBasePtr anItemBase = TreeModel_ModelBase::GetItemByIndex (theIndex);
+  if (anItemBase) {
+    // use this view for attribute/document/label items
+    DFBrowser_ItemPtr anItem = itemDynamicCast<DFBrowser_Item> (anItemBase);
+    if (anItem)
+      aResult = anItem && !anItem->HasAttribute();
+    else
+      aResult = true; // attribute or document item
+  }
+  return aResult;
+}
+
+// =======================================================================
+// function : UpdateByTreeSelectionChanged
+// purpose :
+// =======================================================================
+void DFBrowser_TreeLevelView::UpdateByTreeSelectionChanged (const QItemSelection& theSelected,
+                                                            const QItemSelection&)
+{
+  QModelIndexList aSelectedIndices = theSelected.indexes();
+  QModelIndexList aFirstColumnSelectedIndices;
+  for (QModelIndexList::const_iterator aSelIt = aSelectedIndices.begin(); aSelIt != aSelectedIndices.end(); aSelIt++)
+  {
+    QModelIndex anIndex = *aSelIt;
+    if (anIndex.column() == 0)
+      aFirstColumnSelectedIndices.append (anIndex);
+  }
+
+  if (aFirstColumnSelectedIndices.size() != 1)
+    return;
+
+  DFBrowser_TreeLevelViewModel* aModel = dynamic_cast<DFBrowser_TreeLevelViewModel*> (myTableView->model());
+  const QModelIndex& anIndex = aFirstColumnSelectedIndices.first();
+  if (DFBrowser_TreeLevelView::ProcessItem(anIndex)) // to Init
+    aModel->Init (anIndex);
+  else
+    aModel->Reset();
+}
+
+// =======================================================================
+// function : onTableSelectionChanged
+// purpose :
+// =======================================================================
+void DFBrowser_TreeLevelView::onTableSelectionChanged (const QItemSelection& theSelected,
+                                                       const QItemSelection&)
+{
+  QModelIndexList aSelectedIndices = theSelected.indexes();
+  QModelIndex aSelectedIndex = DFBrowser_Window::SingleSelected (aSelectedIndices, 0);
+
+  DFBrowser_TreeLevelViewModel* aTableModel = dynamic_cast<DFBrowser_TreeLevelViewModel*> (myTableView->model());
+  if (aTableModel && aTableModel->IsInitialized())
+  {
+    const QModelIndex& aTreeViewIndex = aTableModel->GetTreeViewIndex (aSelectedIndex);
+    if (aTreeViewIndex.isValid())
+      emit indexSelected (aTreeViewIndex);
+  }
+}
+
+// =======================================================================
+// function : onTableDoubleClicked
+// purpose :
+// =======================================================================
+void DFBrowser_TreeLevelView::onTableDoubleClicked (const QModelIndex& theIndex)
+{
+  DFBrowser_TreeLevelViewModel* aTableModel = dynamic_cast<DFBrowser_TreeLevelViewModel*> (myTableView->model());
+  if (!aTableModel)
+    return;
+
+  const QModelIndex& aTreeViewIndex = aTableModel->GetTreeViewIndex (theIndex);
+  if (aTreeViewIndex.isValid())
+    emit indexDoubleClicked (aTreeViewIndex);
+}