qtTreeWidgetExtensions.h

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/*********************************************************************
** Copyright (c) 2013 MAK Technologies, Inc.
** All rights reserved.
*********************************************************************/


#pragma once


#include <vrfGuiCoreQt/vrfGuiCoreQt.h>

#include <QtGui/QTreeWidget>
#include <QtGui/QKeyEvent>

class QMimeData;

namespace makVrf
{
   class DT_DLL_VRFGUICOREQT DtTreeWidget : public QTreeWidget
   {
      Q_OBJECT

   public:
      DtTreeWidget(QWidget* parent);

      virtual ~DtTreeWidget();

      virtual QTreeWidgetItem* lastItem() const;

      QTreeWidgetItem* itemFromIndex(const QModelIndex& idx) { return QTreeWidget::itemFromIndex(idx); };

      QModelIndex indexFromItem(QTreeWidgetItem *item, int column = 0) const
      {
         return QTreeWidget::indexFromItem(item, column);
      }

      virtual int indexOfChild(QTreeWidgetItem*) const;

      unsigned int depth(QTreeWidgetItem*) const;

      QTreeWidgetItem* nextSibling(QTreeWidgetItem*) const;

      void setAllowEmptySelection(bool);

      bool allowEmptySelection() const;

   signals:

      void mouseLeftPressed(QTreeWidgetItem*, QMouseEvent*, int col);

      void rightClickOnItem(QTreeWidgetItem*, QMouseEvent*, int col);

      void contentsMoving(int, int);

   protected:

      virtual void mousePressEvent(QMouseEvent *event);

      virtual void mouseReleaseEvent(QMouseEvent *event);

      virtual void scrollContentsBy(int, int);

      virtual QSize sizeHint() const;

      virtual QItemSelectionModel::SelectionFlags selectionCommand(const QModelIndex &index,
                                                                    const QEvent *event = 0) const;

      virtual QItemSelectionModel::SelectionFlags selectionBehaviorFlags() const;

   protected:

      bool myMouseRightClick;
      bool myAllowEmptySelection;
   };

   inline void DtTreeWidget::setAllowEmptySelection(bool b)
   {
      myAllowEmptySelection = b;
   }

   inline bool DtTreeWidget::allowEmptySelection() const
   {
      return myAllowEmptySelection;
   }
}