![]() MainWindow and ImageViewer using Designer B.MainWindow and ImageViewer using Designer A.Note that we were able to delete the previously created "000" directory!Ĭlass TreeViewDirModelDialog : public QDialogĮxplicit TreeViewDirModelDialog(QWidget *parent = 0) So, move on to the next slot which is "delete" slot: Let's see if the directory "000" has been made: Run the code if we can make a new directory: QString name = QInputDialog::getText(this, "Name", "Enter a name") QModelIndex index = ui->treeView->currentIndex() Then, as a next step, let's work on the "Make dir" slot: Yes, it's sorted, selected, expanded, etc. To check we're on track, let's run the code:īecause the list in the current directory TreeView is not sorted, we need to setup sort criteria:Ī little bit more work needed for the initial status of the TreeView: TreeViewDirModelDialog::~TreeViewDirModelDialog()Īt this point, we have already included headers in modelviewdialog.h: Reimplemented from QAbstractItemView::setModel(). QTreeView::setModel(QAbstractItemModel * model) TreeViewDirModelDialog::TreeViewDirModelDialog(QWidget *parent) : ![]() Now, let's do some implementation coding in treeviewdirmodeldialog.cpp: In the simplest case, it can be used with a suitable display widget as part of a browser or filer. This class provides access to the local filesystem, providing functions for renaming and removing files and directories, and for creating new directories. The QFileSystemModel class is a more performant alternative. The usage of QDirModel is not recommended anymore. The QDirModel class provides a data model for the local filesystem. Put the following line in the private section of treeviewdirmodeldialog.h: Void TreeViewDirModelDialog::on_pushButton_2_clicked() Void TreeViewDirModelDialog::on_pushButton_clicked() Let's setup slots for the three buttons by "Go to slot."->clicked(). Since we finished layout, now is the time for coding. We'll use Model-Based TreeView rather than simple Item-Based Tree Widget: However, it's worth investigating their approach of using "delegate" with their Model/View pattern. The advantage of having a delegate in this framework is that it allows the way items of data are rendered and edited to be customized. To allow flexible handling of user input, we introduce the concept of the delegate. This separation makes it possible to display the same data in several different views, and to implement new types of views, without changing the underlying data structures. ![]() This still separates the way that data is stored from the way that it is presented to the user, but provides a simpler framework based on the same principles. If the view and the controller objects are combined, the result is the model/view architecture. In this example, we'll use Qt Gui application with QDialog:Īs we discussed in other ModelView tutorials, Qt's MVC may not be the same as the conventional MVC. ![]()
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