Re： Re： problem about signal itemClicked in MLIST

Stanislav Ionascu

2011-03-07 08:24:31 UTC

Hi,

Is the ListPage::clicked method defined as a slot in ListPage class
definition and the class has a Q_OBJECT macro?
E.g.

class ListPage : public MApplicationPage {
Q_OBJECT
...
public Q_SLOTS:
void clicked(const QModelIndex &);
}

And ListPage class header must me under HEADERS section in the qt
projects file, so the meta object compiler (MOC) would generate the
required code for it to function.

Best Regards,
Stanislav Ionascu.

Post by Sinis
I need MList to show a two level tree model, I append the code to the
class ListCellCreator : public MAbstractCellCreator<MContentItem> {
ListCellCreator();
void updateCell(const QModelIndex & index, MWidget * cell) const;
};
...
void ListCellCreator::updateCell(const QModelIndex & index, MWidget * cell) const {
if (!index.isValid() || !cell) return;
MContentItem * item = qobject_cast<MContentItem *>(cell);
QVariant data = index.data(Qt::DisplayRole);
item->setSubtitle(data.value<QString>());
}
...
void ListPage::createContent()
{
MApplicationPage::createContent();
MLayout * layout = new MLayout(centralWidget());
MLinearLayoutPolicy * policy = new MLinearLayoutPolicy(layout, Qt::Vertical);
MList * list = new MList;
list->setShowGroups(true);
ListCellCreator * creator = new ListCellCreator;
list->setCellCreator(creator);
ListHeaderCreator * headerCreator = new ListHeaderCreator;
list->setHeaderCreator(headerCreator);
list->setItemModel(createModel());
policy->addItem(list);
layout->setPolicy(policy);
centralWidget()->setLayout(layout);
QObject::connect(list, SIGNAL(itemClicked(const QModelIndex &)),
this, SLOT(clicked(const QModelIndex &)));
}
...
void ListPage::clicked(const QModelIndex & index) {
Q_ASSERT(0);
//test
}
I run the code in meego emulator, it shows MList. I click list item,
but ListPage::clicked(const QModelIndex & index) is not be executed,
and i enter DEBUG mode and follow the code with the same result.
PS:I know meegotouch widgetsgallery litter, where could i find more
information about meegotouch widgetsgallery
------------------ 原始邮件 ------------------
发送时间: 2011年3月4日(星期五) 凌晨2:45
主题: Re: Re： [MeeGo-touch-dev] problem about signal itemClicked in
MLIST
If the widget, in this case MContentItem, has the clicked signal, it should just work.
Could you share the part of the code which creates the list cells (The
ListCellCreator class). And how do you check if the signal is emitted
or not?
Does the meegotouch widgetsgallery list page (Lists, Grids and Popups
- > List) work for you? When clicking on the item it should output
"item row number #n clicked", if it works.
Thanks.
Best Regards,
Stanislav Ionascu.

Thanks for your explanation.
But i have a litter puzzled, my ListCellCreator inherits

MAbstractCellCreator<MContentItem> and create widget MContentItem,

MContentItem have a "clicked()" signal, however, i still fail to

emit an "itemClicked" signal. When i clicked mlist,

i can received a "clicked()" signal from some MContentItem instead

of an "itemClicked" signal from mlist.

------------------ 原始邮件 ------------------
发送时间: 2011年3月3日(星期四) 下午5:50
主题: Re: [MeeGo-touch-dev] problem about signal itemClicked in

MLIST

Hi,
For MList to emit an itemClicked signal, your widgets, which are

created

in ListCellCreator, must have a "clicked()" signal.
The itemClicked signals for the headers will not be emitted.
Best Regards,
Stanislav Ionascu.

When i clicked mlist, i find out the signal itemClicked(const
QModelIndex &) would not be emitted.
...
MList * list = new MList;
list->setShowGroup(true);
ListCellCreator * cellCreator = new ListCellCreator ;
list->setCellCreator(cellCreator);
HeaderCellCreator * headerCreator = new HeaderCellCreator ;
list->setHeaderCreator(headerCreator);
list->setModel(model);
connect(list, SIGNAL(itemClicked(const QModelIndex &), this,
SLOT(clickItem(const QModelIndex &)));
...
i code like this, after doing test, when i clicked mlist,
i find signal itemClicked(const QModelIndex &) will not be

emitted,

but the signal in widgets created by ListCellCreator
or HeaderCellCreator can be emitted,
what should i do to get the signal emitted by Mlist instead of
widgets from ListCellCreator or HeaderCellCreator.
Any suggestions are greatly appreciated
Thanks
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