TreeViewContent.h

#ifndef TreeViewContent_H
#define TreeViewContent_H
 
/* SPDX-License-Identifier: CC0-1.0 */
 
// parent
#include <QAbstractScrollArea>
 
 
class QEvent;
class QKeyEvent;
template< typename T > class QList;
class QMouseEvent;
class QPoint;
class QResizeEvent;
 
 
namespace Isis {
  class AbstractTreeItem;
  class AbstractTreeModel;
  class TreeView;
 
  class TreeViewContent : public QAbstractScrollArea {
      Q_OBJECT
 
    public:
      TreeViewContent(QWidget *parent);
      virtual ~TreeViewContent();
      QSize minimumSizeHint() const;
      QSize sizeHint() const;
      AbstractTreeModel *getModel();
      void setModel(AbstractTreeModel *someModel);
 
 
    signals:
      void treeSelectionChanged();
      void treeSelectionChanged(QList< AbstractTreeItem * >);
 
 
    public slots:
      void refresh();
 
 
    protected:
      bool eventFilter(QObject *target, QEvent *event);
      void keyPressEvent(QKeyEvent *event);
      void leaveEvent(QEvent *event);
      void mouseDoubleClickEvent(QMouseEvent *event);
      void mouseMoveEvent(QMouseEvent *event);
      void mousePressEvent(QMouseEvent *event);
      void mouseReleaseEvent(QMouseEvent *event);
      void paintEvent(QPaintEvent *event);
      void resizeEvent(QResizeEvent *event);
      void scrollContentsBy(int dx, int dy);
 
 
    private:
      TreeViewContent(const TreeViewContent &other);
      TreeViewContent &operator=(const TreeViewContent &other);
 
 
    private:
      void nullify();
      void paintItemText(QPainter *, int, QPoint, QPoint);
      void drawCollapsedArrow(QPainter *, QRect);
      void drawExpandedArrow(QPainter *, QRect);
      QRect getArrowRect(AbstractTreeItem *item) const;
 
 
    private slots:
      void scrollTo(QList< AbstractTreeItem * >);
      void scrollTo(AbstractTreeItem *);
      void setAlternatingRowColors(bool);
      void updateItemList();
 
 
    private:
      TreeView *m_parentView;
      AbstractTreeModel *m_model;
      QList< AbstractTreeItem * > * m_items;
 
      QPair< AbstractTreeItem *, bool > * m_pressedItem;
 
      QPair< AbstractTreeItem *, bool > * m_hoveredItem;
 
      AbstractTreeItem *m_lastDirectlySelectedItem;
      QList<AbstractTreeItem *> * m_lastShiftSelection;
 
      QPoint *m_mousePressPos;
      int m_rowHeight;
      int m_contentWidth;
      bool m_alternatingRowColors;
 
 
    private:
      static const int ITEM_PADDING = 4;
      static const int ITEM_INDENTATION = 23;
  };
}
 
#endif