about use QAbstractItemModel and directly use QTreeWidget/QListWidget

opengpu2

i know use QAbstractItemModel is more elegant, and only 1 QAbstractItemModel , can be with many View(QListView/QTreeView, etc).
but i met some problem:

how can i preview the picture file if i use QAbstractItemModel method.
when i use QTreeWidget, while i create the QTreeWidgetItem, i can setIcon.
how i can show all the dir and files in QTreeView, but only selected dir and its child files in the QListView.
when i use QTreeWidget and QListWidget, i can control this all by myself.

thank you

mcosta

Hi,

If I understood correctly you're implementing a sort of FileBrowser. (More info you provide, more you'll get :) )

For question 1 you can write your model in such way to show the file picture (writing the ::data() method in the right way

For question 2 you could use a QSortFilterProxyModel to filter the contents to show

opengpu2

yep, is there any open source demo of FileBrowser?

opengpu2

and in ur opinion, which method should i use, the QAbstractItemModel or directly use QTreeWidget/QListWidget?
i will preview the file in the QListWidget as picture or even more complicated things(eg, many small widget which contains dynamic OpenGL Models)
thank you

opengpu2

and how i deal with the Drag and Drop problem while i use QAbstractItemModel.
eg.some TreeView allow DragDrop,while others donot allowed.
and in the Drag and Drop, i willl pass some Data to the MainWindow.
is it able and easy to do all this work use QAbstractItemModel?

opengpu2

and i will search or filter on some View, even re-sort the files on some View.
is it able and easy to do all this work use QAbstractItemModel?

mcosta

Simple question, Why you don't use QFileSystemModel for that?

opengpu2

thank you,is there any examples of QSortFilterProxyModel ?
it seems not work for me to show only files&sub-dir of a Dir in the List, while the Tree shows all the Dir

opengpu2

QFileSystemModel is not suitable for me, because i want to read data from my database

SGaist

Hi,

So QSqlTableModel ?

Vince Golubic

This might help (I hope I understand your question)
Assuming you have a ui pointer established to a QTreeView or QTreeWidget (Note: some of the following only apply to TreeView (see documentation), but I hope you see the point:

	        ui->treeView->setSelectionMode(QAbstractItemView::SingleSelection);
			ui->treeView->setSelectionMode(QAbstractItemView::ExtendedSelection);
			ui->treeView->setSelectionBehavior(QAbstractItemView::SelectRows);
		    ui->treeView->setIndentation(12);
			ui->treeView->header()->setHighlightSections(true);
			ui->treeView->header()->setProperty("showSortIndicator", QVariant(false))
		    ui->treeView->expandAll();
		    ui->treeView->show();
			model = new TreeModel (mainObj*, this );
            ui->treeView->setDragDropMode(QAbstractItemView::InternalMove);

Hope that helps - Vince