treeview.h

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#ifndef TREEVIEW_H
#define TREEVIEW_H

#include <QWidget>

class TreeItem;
class QSqlQueryModel;
class QPushButton;
class QComboBox;

class TreeItemSelectionBox : public QWidget
{
    Q_OBJECT
public:
    TreeItemSelectionBox(TreeItem *treeItem, QWidget * parent = 0);

private slots:
    void slot_commitButton_clicked();
    void setupModel(QSqlQueryModel *model);

signals:
    void signal_commitSelection(int newItemId, QString columnName);
    void signal_commitSelection(QString newPath);

private:
    QComboBox *selectionBox;
    QPushButton *commitSelection;
    TreeItem *treeItem;
    QString path;
};

#include <QWidgetAction>

class TreeItemSetupAction : public QWidgetAction
{
    Q_OBJECT
public:
    TreeItemSetupAction(TreeItem *treeItem, QObject *parent = 0);
    TreeItemSelectionBox *defaultWidget();

private slots:
    void slot_executeAction(QString newPath);

private:
    TreeItem *m_treeItem;
};

#include <QMenu>

class ProjectTreeModel;
class QModelIndex;

class TreeViewMenu : public QMenu
{
    Q_OBJECT
public:
    TreeViewMenu(const QModelIndex &index, QWidget *parent = 0);

private:
    void AddSubMenu();

private slots:
    void slot_actionTriggered(QAction *action);
    void removeSelected();

private:
    ProjectTreeModel *m_model;
    TreeItem *m_treeItem;
    TreeItemSetupAction *m_action;
    const QModelIndex *index;
};

#include <QStyledItemDelegate>

class TreeViewDelegate : public QStyledItemDelegate
{
    Q_OBJECT
public:
    TreeViewDelegate(QObject *parent = 0);
    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                          const QModelIndex &index) const;
    void setEditorData(QWidget *editor, const QModelIndex &index) const;
    void setModelData(QWidget *editor, QAbstractItemModel *model,
                      const QModelIndex &index) const;
    void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option,
                              const QModelIndex &index) const;
};

#include <QList>

#include "treeitem.h"

typedef QList<TreePath> TreePathList;

Q_DECLARE_METATYPE(TreePathList);

#include <QTreeView>

class ProjectTreeView : public QTreeView
{
    Q_OBJECT
public:
    ProjectTreeView(QWidget *parent = 0);
    ~ProjectTreeView();

    virtual void setModel(QAbstractItemModel *model);
    ProjectTreeModel *model();

protected:
    void contextMenuEvent(QContextMenuEvent *e);

protected slots:
    virtual void onCollapse(const QModelIndex &index);
    virtual void onExpand(const QModelIndex &index);

private slots:
    void restoreExpandedItems();
    void saveExpandedItems();

private:
    TreePathList expandedTreePaths;
};

#endif // TREEVIEW_H