Checkboxes and spinboxes to list

Q139

Hi,
How to align text in QlistWidget?
How to add checkboxes and spinboxes to QlistWidget or QlistView?
If it all in docs plese point to the right material.

? Offline

Hi! You need to subclass QListWidgetItem, see QListWidgetItem Class.

samdol

@Q139
You may look into
http://doc.qt.io/qt-4.8/qt-itemviews-spinboxdelegate-example.html
It uses QTableView, but you can do the same thing on QListView.

Q139

Thanks for pointing in right direction

? Offline

To add to samdol, here is the same link for Qt 5: Spin Box Delegate Example

Q139

Is it possible to load frame designed via ui designer to list also?

mrjj

@Q139
Hi
Yes you could use UI file but its really not working
that way and would be very heavy when just a few items in list.

However, you can easy draw in UI and the just take the code and use.
( the UI files is translated to c++ code to create what you have drawn)
Please see inside the setupUI() found in mainwindow

Q139

@mrjj Good tips, will just code then.

mrjj

@Q139
:)
The normal trick is that when editing its real widgets but when not editing the row
then its just drawn. This is to keep it non heavy.

But if you only have few items in list, there is also
http://doc.qt.io/qt-5/qlistwidget.html#setItemWidget

That lets you set widget with no fuss.
This solution have bad performance very fast.

Q139

That seems easyest way , list will be max 20 item and updated rarely mostly.

mrjj

@Q139
Ok. On a desktop class pc. i had over 1000 with no issue but
if you run on weaker devices, redraw can be issue.
But not with 20 :)

VRonin

How to align text in QlistWidget

use something like listWidgetItem->setData(Qt::TextAlignmentRole, Qt::AlignCenter); or listWidget->model()->setData(listWidget->model()->index(row,0),Qt::AlignCenter,Qt::TextAlignmentRole);

How to add checkboxes

use something like listWidgetItem->setFlags(listWidgetItem->flags() | Qt::ItemIsUserCheckable);

and spinboxes to QlistWidget or QlistView?

Subclass QStyledItemDelegate and set it on the view or, if you just need the editor, subclass QItemeditorFactory and apply it to your default delegate.

P.S.
Rather than using the Q*Widgets (which I hate) why not separate the model and the view?! http://doc.qt.io/qt-5/model-view-programming.html

Q139

Tryed manual code but decided to do design ui to position items better.

for(uint n=0; n<set_to_use.extra.corSetVec.size(); n++){
    if(ui->corSetList->count() <= n){//to initialize more items
        ui->corSetList->addItem("");
    }
    corSetStruct co=set_to_use.extra.corSetVec[n];
    corSetListComponent * wid = new corSetListComponent;// ui widget
    wid->setStructToUI(co);// data to ui widget
    wid->vecIndex=n; 
    
    QSize siz; // to set item size
    siz.setHeight(wid->height());
    siz.setWidth(ui->corSetList->width()-4); //-4 to avoid creating slider bar
    ui->corSetList->item(n)->setSizeHint(siz);
    ui->corSetList->setItemWidget(ui->corSetList->item(n),wid); 
}

This solved it so far, may not be best code but it work for now.
Would qListWidget delete the corSetListComponent * wid = new corSetListComponent; from ram after list item removed?