I am trying to use Qtreewidget as listview (like in C#) to display some data. As seen on the image below, while new datas displayed during the runtime, the widget doesn't focus on the last entry.That is what I want but couldn't find a method to make it focus on the last entry. In other words, I want it to be scrolled down to the last entry. Is there any way to do it or do I have to use something another to handle this ?
Thanks in advance.
Maybe this code will helps you:
QTreeWidget *mytree = new QTreeWidget(this);
...
mytree->scrollToBottom();
Related
I'm stuck. With QTableView + QStandartItemModel + QSortFilterProxyModel I can only add 1 QLineEdit for 1 specific column line_edit.textChanged.connect(filter_model.setFilterRegExp). Moreover I can't figure out how to add widget item to QTableView but only to QTableWidget (which i can't use because of filter?). I may give up the idea of adding widget and just make my whole row open another dialog on double click.But still I don't understand how to filter multiple columns at the same time. Thanks in advance
Moreover I can't figure out how to add widget item to QTableView
You need use QtGui.QItemDelegate for such thing. Have a look at this nice code snippet (not mine). And please read Qt manual about QItemDelegate and Model View Delegate pattern.
I have a database, which tables should viewed in a widget. Seems simple, but I can't decide what to du or use.
Each row of the table should be viewed as one list view item, for instance, imagine table with this fields: id, title, content, date, number.
I need to view it as a list view (not hard-coded, it may also be another thing, if it is possible or better), and the label of the list view item should be the title field. But when the user clicks or double clicks on that item it should open all the contents of the current row in a separate widget. The all of these can be implemented easily by me, but I can't understand what to use: QListView with its model, or QListWidget? Or maybe QSqlTableModel? The last one is unfamiliar to me, I can read about from documentation, but if you have heard or met some kind things/applications, please provide a better solution for described problem.
Hope I could explain my problem correctly,
Thanks in advance.
Have you read about model/view programming in Qt? Basically you should use some model (QSqlTableModel, QSqlQueryModel, QSqlRelationalTableModel or create your own) an then attach it to QListView or QListWidget.
HI..
i am new to QT,i want to know how to customize the listview in QT i.e i want to add multiple icon in single row.. etc.. i tried lot i am not getting how to do that..
i tried with Qlistwidget, in tat i can only insert single row with one image.. i am not able to place multiple icon with desired locations..
please assist me, which control is good listview or listwidget.
and how to customize the same according to my view
if you have any sample examples. please provide me the link.
Thanks
You can implement a delegate to customize the rendering of the items in your view.
From the model/view programming docs: delegates are responsible for rendering individual items in the views.
See the pixelator sample for example usage.
Take a look at QTableView or QTableWidget. You can insert the icons in the first two columns and the text in the third column. Or any other way you like it.
I guess you can use some delegates.
Have a look at http://qt.nokia.com/doc/4.6/model-view-delegate.html
Hope it helps !
I'm showing a popup menu to select some values in a QTableWidget. The lowest item is a "Modify list" entry, when I select it a new window should automatically appear and the QComboBox should vanish and the cell return to a Qt::DisplayRole state.
Now Qt has all those nice API-calls like QTableWidget.edit() and QTableWidget.editItem(), what I'm really looking for is a QTableWidget.endEditing(), preferably without specifying the index of the cell, though I could get that using this call:
table.currentIndex()
… but I don't know if I can guarantee that the current cell is the cell being edited at all times.
Is there an API to close those kind of editors?
QTableWidget inherits 19 public slots from QWidget. One of those is setDisabled(), which should disable input events for that widget and all of its children.
I would try:
table.setDisabled( true );
table.setDisabled( false );
Although you said it does not work for you, there is an alternative method:
If you don't like that (the table loses focus, I believe), you can try using EditTriggers. For example:
table.setEditTriggers( QAbstractItemView::NoEditTriggers );
table.setCurrentItem(None) is what worked for me. (Don’t forget to block signals if you use some cellChanged/itemChanged slot function.)
This is with PyQt. For C++ I think replace None with NULL.
You may be able to use QTableWidget.closePersistentEditor() to close the editor. However, QAbstractItemView.closeEditor() may be closer to what you want, especially since you seem to be comfortable with the QModelIndex-based API and are already using a custom editor widget.
In my case, none of the options worked properly. So, I figured: I need to send the key press event to the line edit itself. The following works with QTreeView but probably does work with any other view or widget that opens a line edit to edit cells.
QWidget* editingWidget = treeView->findChild<QLineEdit*>();
if(editingWidget)
{
QKeyEvent keyPressEvent(QEvent::KeyPress, Qt::Key_Return, Qt::NoModifier);
QApplication::sendEvent(editingWidget, &keyPressEvent);
QApplication::processEvents(); // see note below
}
In my case, I wanted to start editing another field directly when having finished editing one item. That is why I put processEvents there, in most cases you can probably remove that line.
PS: yeah, it's C++, but should be easily adaptable to Python. I found this thread when I searched for the C++ solution, so maybe it helps anyone else, too.
I can't speak for list widgets. But, I got here trying to do something similar.
I was double-clicking a cell, and based on the column, bringing up a sub-form with a list, then when that was closed move to the next appropriate column based on the value selected.
My problem was I could get the value in the cell and "select" the next appropriate cell, but the original cell stayed selected in edit mode!
It finally dawned on me that my double-click was selecting the cell, ie. editing.
A single-click selects the cell but doesn't open an edit mode.
Side note: Never could get that sub-form to act truly modal, so I created a loop in the calling form: while the sub form was visible, with the only code being app.processEvents()
I've got a QTableView for which I want to display the last column always in edit mode. (It's a QComboBox where the user should be able to always change the value.)
I think I've seen the solution in the Qt documentation, but I can't find it anymore. Is there a simple way of doing it?
I think I could archive this effect by using openPersistentEditor() for every cell, but I'm looking for a better way. (Like specifying it only one time for the whole column.)
One way to get the automatic editing behaviour is to call the view's setEditTriggers() function with the QAbstractItemView::AllEditTriggers value.
To display the contents of a given column in a certain way, take a look at QAbstractItemView::setItemDelegateForColumn(). This will let you specify a custom delegate just for those items that need it. However, it won't automatically create an editor widget for each of them (there could in principle be thousands of them), but you could use the delegate to render each item in a way that makes it look like an editor widget.
There are two possibilities:
Using setIndexWidget, but Trolltech writes:
This function should only be used to
display static content within the
visible area corresponding to an item
of data. If you want to display custom
dynamic content or implement a custom
editor widget, subclass QItemDelegate
instead.
(And it breaks the Model/View pattern…)
Or using a delegate's paint method. But here you have to implement everything like enabled/disabled elements yourself.
The QAbstractItemModel::flags virtual function is called to test if an item is editable (see Qt::ItemIsEditable). Take a look at Making the Model Editable in the Model/View Programming documentation.
I can't see an easy way to do this, but you might be able to manage by using a delegate. I honestly don't know exactly how it would work, but you should be able to get something working if you try hard enough. If you get a proper delegate, you should be able to set it on a whole view, one cell of a view, or just a column or row.