QCheckListItem with multiple columns?

[ecphora]

Is there a way to create a QCheckListItem with multiples columns in Qt 3?

I want a function similar to:

QListViewItem( QListView * parent,
QString, QString = QString::null,
QString = QString::null, QString = QString::null,
QString = QString::null, QString = QString::null,
QString = QString::null, QString = QString::null );

but with a check box in the first column.

[jacek]

Every QCheckListItem is a QListViewItem.

[ecphora]

Fair enough. I can write:

QListView* listView;
QCheckListItem *oneColumn = new QCheckListItem( listView, "A" );

with no problem. However, If I write

QCheckListItem *twoColumms = new QCheckListItem( listView, "A", "B" );

under Windows, I get the error message:

error C2664: 'QCheckListItem::QCheckListItem(QCheckListItem *,const QString &,QCheckListItem::Type)' : cannot convert parameter 3 from 'const char [2]' to 'QCheckListItem *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

Similarly, if I write

QCheckListItem *threeColumms = new QCheckListItem( listView, "A", "B", "C" );

the error is:

error C2664: 'QCheckListItem::QCheckListItem(QCheckListItem *,QListViewItem *,const QString &,QCheckListItem::Type)' : cannot convert parameter 2 from 'const char [2]' to 'QCheckListItem *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

If I attempt four or more columns,

QCheckListItem *fourColumms = new QCheckListItem( listView, "A", "B", "C", "D" );

the error is:

error C2661: 'QCheckListItem::QCheckListItem' : no overloaded function takes 5 arguments

None of the QCheckListItem constructors seem to give me the option of having more than one column.

Am I missing something obvious?

[jpn]

QCheckListItem *twoColumms = new QCheckListItem( listView, "A", "B" );

under Windows, I get the error message:

error C2664: 'QCheckListItem::QCheckListItem(QCheckListItem *,const QString &,QCheckListItem::Type)' : cannot convert parameter 3 from 'const char [2]' to 'QCheckListItem *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

QCheckListItem does not have a constructor which would take several column labels.
Try this:

QCheckListItem *twoColumms = new QCheckListItem( listView, "A");
twoColumns->setText(1, "B");

QCheckListItem *twoColumms = new QCheckListItem( listView, "A");
twoColumns->setText(1, "B");

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[ecphora]

That does the trick, and I guess it was fairly obvious, although I didn't think of it.

In the meantime, since I needed to get the job done, I subclassed QListViewItem, and overrode paintCell() and activate() to draw my own checkbox and toggle the state. That approach works too, and I can write my constructor to have multiple strings like the QListViewItem constructor does.

[Chicken Blood Machine]

Surely it would make more sense to do that with QCheckListItem?

[ecphora]

Well, it would have made sense if I'd figured out how to use QCheckListItem with multiple columns first. Like I said, I had to get some code working, and I took the only path I could think of before jpn posted the solution. I really don't mind drawing my own checkbox and maintaining its state. It only took a few minutes to implement.

[Chicken Blood Machine]

Well, it would have made sense if I'd figured out how to use QCheckListItem with multiple columns first. Like I said, I had to get some code working, and I took the only path I could think of before jpn posted the solution. I really don't mind drawing my own checkbox and maintaining its state. It only took a few minutes to implement.

Fair enough, it just seems odd that you'd want to do something that Qt already implements for you, but whatever works I guess...

It seems to me that the overloaded constructors of endless parameter lists (1-9 strings) are unecessary. setText() does the job just fine for as many columns as you want. This constructor style used in Qt3 has certainly been deprecated in Qt4 in favour of a clearer API:

http://doc.trolltech.com/qq/qq13-api...onveniencetrap