ProjectItemTreeView.cpp

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#include "ProjectItemTreeView.h"

#include <QAbstractItemView>
#include <QDesktopWidget>
#include <QEvent>
#include <QObject>
#include <QRect>
#include <QTreeView>
#include <QVBoxLayout>
#include <QWidget>

#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 {
    QDesktopWidget deskTop;
    QRect availableSpace = deskTop.availableGeometry(deskTop.primaryScreen());
    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);
  }

}