[SOLVED]How to delete an item from the treeview by droping an item to pushbutton or to an group box

[mrjj]

@Ratzz said:

But i do not want the user to allow listview items to dragged to pushbutton/groupbox

So why can you not check there ?

also
http://doc.qt.io/qt-5/qtreewidget.html#dropMimeData
Seems to be when something is dropped on Tree and im confused what it has to do with the
Groupbox ?

[Ratzz]

@mrjj
Since the groupbox is deletes item as you suggested it also deletes listview items when dragged.

[mrjj]

@Ratzz
And the DragGBox do have
void dragEnterEvent(QDragEnterEvent* event) {
event->acceptProposedAction();
}

So why cant you just check that sender if the accepted one and then acccept or if not then
reject the drop?

[Ratzz]

@mrjj
dragEnterEvent shoud be used for main class?

[mrjj]

@mrjj said:
For the DropGroupBox class.
I assume you use that one?

[Ratzz]

@mrjj
yes i have used this one.
Since its different class how to pull the sender to it?
can you just drop me some piece of code.

[Ratzz]

@mrjj
Not it does not allow even the treeview items to drop

[mrjj]

STOP
sender() not working for events it seems.
So cannot work.
So its a no go.

[Ratzz]

@mrjj
ok fine.. what next?!

[mrjj]

@Ratzz
you can use
QWidget * QDropEvent::source() const

read here
http://doc.qt.io/qt-5.5/qdropevent.html#source

[Ratzz]

@mrjj
this way?

    void dragEnterEvent(QDragEnterEvent* event) {
        QWidget * theone= dynamic_cast<QWidget*>(event->source());
        if( theone == NULL )
        {
            event->acceptProposedAction();
        }
    }

[mrjj]

@Ratzz
almost but must be the type you want to allow
QTreeView * theone= dynamic_cast<QTreeView*>(event->source());
if( theone != NULL )
{
event->acceptProposedAction();
}

so it says if it IS a Treeview then say ok
For other types, it should not allow then. (red sign)
I hope :)

[Ratzz]

@mrjj
yes its working fine :)
i should implement for Pushbutton also .

[mrjj]

@Ratzz
Super :)

[Ratzz]

@mrjj
when i click delete button i do ui->label->setText(QString::number(parent->rowCount())); which gives me count of the number of rows. But if i drag the row will be deleted but count is not getting updated. how to update it ?
Should it be done on GroupDropBox??

[mrjj]

@Ratzz
GroupBox would not know about parent.
The Tree should update when the It is removed.

But then you drag, do you call the buttons on_click so the
ui->label->setText(QString::number(parent->rowCount()))
is executed ?
The groupBox example does not call anything as the Tree removes the item it self so
I assume that is why you dont see Count Changes.

[mrjj]

Hi
you could also cheat a bit and use a timer.

QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(updateMinorFrameCount()));
timer->start(1000);

[Ratzz]

@mrjj
cheating works fine :)