ProjectItemTreeView.cpp

 
/* SPDX-License-Identifier: CC0-1.0 */
 
#include "ProjectItemTreeView.h"
 
#include <QAbstractItemView>
#include <QEvent>
#include <QObject>
#include <QRect>
#include <QTreeView>
#include <QVBoxLayout>
#include <QWidget>
#include <QGuiApplication>
#include <QScreen>
 
#include "ProjectItem.h"
#include "ProjectItemModel.h"
 
 
namespace Isis {
  ProjectItemTreeView::ProjectItemTreeView(QWidget *parent) : AbstractProjectItemView(parent) {
 
    m_treeView = new QTreeView(this);
    m_treeView->installEventFilter(this);
 
    setInternalModel( internalModel() );
    // 2017-04-12 TSucharski Turn off for now, since not accepting drops, not point in allowing
    // drags
//  m_treeView->setDragEnabled(true);
    m_treeView->setDragEnabled(false);
    m_treeView->setAcceptDrops(false);
    m_treeView->setHeaderHidden(true);
 
    //  Simply doing this creates scrollbar when the dock widget within the main window is made too
    //  small- looks like QMainWindow and/or QDockWidget handles the scrollbars for us.
    setCentralWidget(m_treeView);
 
    //This works so that it cannot be shrunk in width, only grown
    setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Expanding);
 
    //  Currently set all items on view to un-editable
    //m_treeView->setEditTriggers(QAbstractItemView::NoEditTriggers);
 
//  setAcceptDrops(true);
  }
 
 
  QSize ProjectItemTreeView::sizeHint() const {
    QRect availableSpace = (QGuiApplication::primaryScreen()->availableGeometry());
    return QSize(.15 * availableSpace.width(), .5 * availableSpace.height());
  }
 
 
  ProjectItemTreeView::~ProjectItemTreeView() {}
 
 
  QTreeView *ProjectItemTreeView::treeView() {
    return m_treeView;
  }
 
 
  void ProjectItemTreeView::setInternalModel(ProjectItemModel *model) {
    disconnect(internalModel(), 0, this, 0);
 
    AbstractProjectItemView::setInternalModel(model);
 
    m_treeView->reset();
    m_treeView->setModel(model);
    m_treeView->setSelectionModel( model->selectionModel() );
    m_treeView->setSelectionMode(QAbstractItemView::ExtendedSelection);
 
    connect( model, SIGNAL( itemAdded(ProjectItem *) ),
             this, SLOT( onItemAdded(ProjectItem *) ) );
 
  }
 
 
  void ProjectItemTreeView::onItemAdded(ProjectItem *item) {
    ProjectItem *parent = item->parent();
    if (!parent) {
      return;
    }
    if ( !parent->isImageList() && !parent->isControlList() ) {
      m_treeView->expand( parent->index() );
    }
  }
 
 
  bool ProjectItemTreeView::eventFilter(QObject *watched, QEvent *event) {
    if (event->type() == QEvent::DragEnter) {
      return true;
    }
    else if (event->type() == QEvent::Drop) {
      return true;
    }
 
    return AbstractProjectItemView::eventFilter(watched, event);
  }
 
}