自定义高级QFileDialog文件过滤器

QFileDialog提供了一个函数---setproxyModel。。就是用这个来玩了。就是override filterAcceptsRow的虚函数，里面定制自己的过滤需求。返回bool   下面就是判断是否是目录，只显示目录文件夹。

 #ifndef PROXY_MODEL_H
 #define PROXY_MODEL_H

 #include <QSortFilterProxyModel>

 class FileFilterProxyModel : public QSortFilterProxyModel
 {
 public:
     FileFilterProxyModel(QObject* parent) :QSortFilterProxyModel(parent){}

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

 #endif

#include "proxymodel.h"

#include <QFileSystemModel>
#include <QDebug>

bool FileFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
{
	QModelIndex index0 = sourceModel()->index(sourceRow, 0, sourceParent);
	QFileSystemModel* fileModel = qobject_cast<QFileSystemModel*>(sourceModel());

	if (fileModel != NULL && fileModel->isDir(index0))
	{
		qDebug() << fileModel->fileName(index0);
		return true;
	}
	else
		return false;
	// uncomment to execute default implementation
	//return QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent);
}

　　

 QFileDialog dialog;
 FileFilterProxyModel* proxyModel = new FileFilterProxyModel();
   dialog.setOption(QFileDialog::DontUseNativeDialog);
 dialog.setProxyModel(proxyModel);
 dialog.exec();

references:

http://*.com/questions/4893122/filtering-in-qfiledialog

http://*.com/questions/2101100/qfiledialog-filtering-folders