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。

 1 #ifndef PROXY_MODEL_H

 2 #define PROXY_MODEL_H

 3 

 4 #include <QSortFilterProxyModel>

 5 

 6 

 7 class FileFilterProxyModel : public QSortFilterProxyModel

 8 {

 9 public:

10     FileFilterProxyModel(QObject* parent) :QSortFilterProxyModel(parent){}

11 

12 protected:

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

14 };

15 

16 

17 #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);

}

　　

 

1 QFileDialog dialog;

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

3 dialog.setProxyModel(proxyModel);

4 dialog.exec();

 

 

 

 

 

references:

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

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