QDirModel::setNameFilters

[Smudge]

Hi,

Has anyone out there used

QDirModel::setNameFilters(const QStringList &filters)

QDirModel::setNameFilters(const QStringList &filters)

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?

I have been trying to set a basic toggle filter on my View to display directories and jpegs in a given path, turning the filter off seems to work with:

mpHostPathModel->setNameFilters(QStringList() << "*");

mpHostPathModel->setNameFilters(QStringList() << "*");

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but an attempt to turn it on with:

mpHostPathModel->setNameFilters(QStringList() << "*.jpg");

mpHostPathModel->setNameFilters(QStringList() << "*.jpg");

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Causes the view to reset to the root directory with only a few directories available

Has anyone used it with success, can anyone give examples of how to use it as the helptext is pretty vague.

Thanks,
Andy.

[Smudge]

In case anyone's interested, I found an alternative method using QSortFilterProxyModel!

Created a class based on the proxy model
header:

class QHostProxyModel : public QSortFilterProxyModel
{
	Q_OBJECT
public:
	QHostProxyModel(QObject *parent = 0);
 
	inline void setFilterList(const QStringList &filter)
		{ mFilterList = filter; };
 
protected:
	virtual bool filterAcceptsRow(int source_row,
					const QModelIndex &source_parent) const;
 
private:
	QStringList mFilterList;
};

class QHostProxyModel : public QSortFilterProxyModel
{
	Q_OBJECT
public:
	QHostProxyModel(QObject *parent = 0);

	inline void setFilterList(const QStringList &filter)
		{ mFilterList = filter; };

protected:
	virtual bool filterAcceptsRow(int source_row,
					const QModelIndex &source_parent) const;

private:
	QStringList mFilterList;
};

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source:

QHostProxyModel::QHostProxyModel(QObject *parent)
: QSortFilterProxyModel(parent)
, mFilterList()
{
}
 
bool QHostProxyModel::filterAcceptsRow(int source_row,
										const QModelIndex &source_parent) const
{
	QDirModel *pSourceModel = (QDirModel *)sourceModel();
	QModelIndex index = pSourceModel->index(source_row, 0, source_parent);
 
	if( pSourceModel->isDir(index) )
	{
		return TRUE;
	}
 
	if( mFilterList.count() == 0 )
	{
		return TRUE;
	}
 
 
	QString filterIndex;
	foreach( filterIndex, mFilterList )
	{
		QString fileType = pSourceModel->
			data(index).toString().right(filterIndex.length()).toLower();
		if( fileType == filterIndex )
		{
			return TRUE;
		}
	}
 
	return FALSE;
}

QHostProxyModel::QHostProxyModel(QObject *parent)
: QSortFilterProxyModel(parent)
, mFilterList()
{
}

bool QHostProxyModel::filterAcceptsRow(int source_row,
										const QModelIndex &source_parent) const
{
	QDirModel *pSourceModel = (QDirModel *)sourceModel();
	QModelIndex index = pSourceModel->index(source_row, 0, source_parent);

	if( pSourceModel->isDir(index) )
	{
		return TRUE;
	}

	if( mFilterList.count() == 0 )
	{
		return TRUE;
	}


	QString filterIndex;
	foreach( filterIndex, mFilterList )
	{
		QString fileType = pSourceModel->
			data(index).toString().right(filterIndex.length()).toLower();
		if( fileType == filterIndex )
		{
			return TRUE;
		}
	}

	return FALSE;
}

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Then created the model/view using:

mpHostPathModel	= new QDirModel;
mpHostProxyModel = new QHostProxyModel(this);
mpHostProxyModel->setFilterList(QStringList() << ".jpg");
mpHostProxyModel->setSourceModel(mpHostPathModel);
ui.mpHostDriveView->setModel(mpHostProxyModel);

mpHostPathModel	= new QDirModel;
mpHostProxyModel = new QHostProxyModel(this);
mpHostProxyModel->setFilterList(QStringList() << ".jpg");
mpHostProxyModel->setSourceModel(mpHostPathModel);
ui.mpHostDriveView->setModel(mpHostProxyModel);

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Hope that helps anyone with similar problems,
Andy.