How to update items in a QTreeView

Hi all,

I am a newbie using Qt and I am stuck with this problem. Let me resume ...

I am trying to display a tree containing nodes representing resource items.
Those items have several attributes (image id, ...) and booleans such as resourceVisible [true|false].

I am able to display the tree with icons representing my booleans (using a delegate). I also use a QSortFilterProxyModel to filter the rows.

Now I would like to update the model when the user click on the icon representing the boolean resourceVisible. But I can't have it work :-\

Here is my program

Structure defining a resource:

Code:

struct ResourceTreeItem {
 
	ResourceTreeItem(std::string resourceID=""):m_resourceID(resourceID), m_resourceVisible(true), m_contentVisible(true),
	m_boundaryBoxVisible(true), m_mosaicked(true), m_IDVisible(true) {}
 
	ResourceTreeItem(const ResourceTreeItem& copy): m_resourceID(copy.m_resourceID), m_resourceVisible(copy.m_resourceVisible), m_contentVisible(copy.m_contentVisible),
	m_boundaryBoxVisible(copy.m_boundaryBoxVisible), m_mosaicked(copy.m_mosaicked), m_IDVisible(copy.m_IDVisible) {}
 
	std::string m_resourceID;
	bool m_resourceVisible;
	bool m_contentVisible;
	bool m_boundaryBoxVisible;
	bool m_mosaicked;
	bool m_IDVisible;
};

A node (based on Editable Tree Model Example):

Code:

class ResourceTreeNode {
public:
    ResourceTreeNode(const ResourceTreeItem& data, ResourceTreeNode* parent = 0);
    ~ResourceTreeNode();
 
    QVariant data(int column) const;
    bool setData(int column, const QVariant& value);
    ResourceTreeNode* child(int number);
    ResourceTreeNode* parent();
 
    int childCount() const;
    int childNumber() const;
    bool insertChildren(int position, int count, ResourceTreeItem resourceTreeItem);
    bool removeChildren(int position, int count);
 
private:
    ResourceTreeNode* m_parent;
    ResourceTreeItem m_resourceTreeItem;
    QList<ResourceTreeNode*> m_childrens;
 
};

A custom model (also based on Editable Tree Model Example):

Code:

class QResourceTreeModel : public QAbstractItemModel
{
	Q_OBJECT
 
public slots:
	void itemClicked(const QModelIndex &index);
 
public:
	static const int NB_COLUMN = 6;
 
	QResourceTreeModel(QObject *parent = 0) : QAbstractItemModel(parent), m_root(0) {}
       QResourceTreeModel(ResourceTreeNode* root, QObject *parent = 0) : QAbstractItemModel(parent), m_root(root) {}
 
	void setRootNode(ResourceTreeNode* node);
 
	QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const;
	QModelIndex parent(const QModelIndex& index) const;
 
 
	int rowCount(const QModelIndex &parent = QModelIndex()) const;
	int columnCount(const QModelIndex &parent = QModelIndex()) const;
 
	QVariant data(const QModelIndex &index, int role) const;
	QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
 
private:
	ResourceTreeNode* getNode(const QModelIndex& index) const;
	ResourceTreeNode* m_root;
};

Basically I connect the signal clicked(const QModelIndex &) to my slot itemClicked(const QModelIndex &index) so I can update the corresponding cell in the tree.

Here is some key methods ...

Code:

QVariant ResourceTreeNode::data(int column) const
{
        switch (column) {
	case 0:
		return QVariant(m_resourceTreeItem.m_resourceVisible);
	case 1:
return QVariant(m_resourceTreeItem.m_resourceID.c_str());
	case 2:
		return QVariant(m_resourceTreeItem.m_contentVisible);
	case 3:
		return QVariant(m_resourceTreeItem.m_boundaryBoxVisible);
	case 4:
		return QVariant(m_resourceTreeItem.m_mosaicked);
	case 5:
		return QVariant(m_resourceTreeItem.m_IDVisible);
	default:
		return QVariant();
	}
 
	return QVariant();
}

Code:

bool ResourceTreeNode::setData(int column, const QVariant& value) {
 
	if (column < 0 || column >= 5) {
		return false;
	}
 
	switch (column) {
	case 0:
		m_resourceTreeItem.m_resourceVisible = value.toBool();
	case 1:
		m_resourceTreeItem.m_resourceID =  value.toString().toStdString();
	case 2:
		m_resourceTreeItem.m_contentVisible = value.toBool();
	case 3:
		m_resourceTreeItem.m_boundaryBoxVisible = value.toBool();
	case 4:
		m_resourceTreeItem.m_mosaicked = value.toBool();
	case 5:
		m_resourceTreeItem.m_IDVisible = value.toBool();
	default:
		break;
	}
 
	return true;
}

Code:

void QResourceTreeModel::itemClicked(const QModelIndex &index) {
       if ((index.isValid()) && (index.column() != 1)) {
 
           /* The idea is to store false if it was true or true if it was false */
 
            ResourceTreeNode* node = getNode(index);
            bool result = node->setData(index.column(), QVariant(!node->data(index.column()).toBool()));
 
            if (result) {
	        emit dataChanged(index, index);
	    }
        }
}

My problem comes from the method ResourceTreeNode::getNode(index) in QResourceTreeModel::itemClicked(index). The returned node does not contain any ResourceTreeItem? I used a log in getNode() and the problem only happen when I call getNode() from my slot. Somebody have any hints?