Hi,
You have to use "setModelColumn"
videoCombo.setModelColumn(0);
videoCombo.setModel(model);
On 08/04/2014 03:26 ص, Jeffrey Scott
Flesher Gmail wrote:
Does anyone have a working example of how to use QueryModel to
bind to WComboBox or another like type of widget?
I could not find any examples and my guess below is not working.
I am trying to bind a single table with one column
class TheVideo
{
public:
TheVideo();
std::string categories; // categories for Combo box
std::string name; // Name for Combo box
template<class Action>
void persist(Action &a)
{
Wt::Dbo::field(a, categories, "categories");
Wt::Dbo::field(a, name, "name");
}
};
// My class is derived from Wt::Dbo::Session, I read from an XML
file and correctly populate the table in this class
Wt::Dbo::QueryModel< Wt::Dbo::ptr<TheVideo> > *model =
new Wt::Dbo::QueryModel< Wt::Dbo::ptr<TheVideo> >();
model->setQuery(query< Wt::Dbo::ptr<TheVideo>
>("select u from video u").where("categories = ?").bind("IAM"),
false);
model->addColumn("name");
videoCombo.setModel(model);
I have several rows in the table with the categories = IAM, but
inspecting the model, currentRow_ = -1, I get a segment fault on
setModel.
Thanks
On Thu, 2014-03-13 at 08:27 -0700, Jason H wrote:
Why wouldn't you just use a QSql[Query|Table]Model for the combo box?
Or in Wt, a Wt::Dbo::QueryModel< Result >
QXmlStreamReader is easy if the schema is easy. You just get elements as they occur.
________________________________
From: Jeffrey Scott Flesher Gmail <jeffrey.scott.fles...@gmail.com>
To: Wt <witty-interest@lists.sourceforge.net>
Sent: Tuesday, March 11, 2014 7:23 PM
Subject: [Wt-interest] Can you use XML or SQL as a data source for WComboBox?
I do not see any examples of it, beside one very confusing forum thread, with no full example code, I did not find anything else, I am mostly interested in XML.
My guess would be that I would use:
combo = new WComboBox(this);
WStandardItemModel *si = new WStandardItemModel();
and use QXmlStreamReader to read in the data, and attach it with:
WStandardItem *i = new WStandardItem();
i->setData(p1.key, UserRole);
i->setText(p1.name);
si->appendRow(i);
combo->setModel(si);
Found this at http://andres.jaimes.net/799/how-to-use-a-combobox-with-cwt-witty/
I can work on this and get it to work with no problem, but I was wondering if there is an easier way, or if this is the way to do it.
Do you have a Wt class to read XML?
or is QXmlStreamReader just as easy and fast?
Thanks
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