different items in one cell QTableWidget - qt

Question

I am learning Qt and create a small example like this.
table
I have read some suggested questions which relate to my problem here but right now they are not easy for me to understand.
This is my code, above function is calendar interaction, below function is for showing items:
SmallExample::SmallExample(QWidget *parent)
: QWidget(parent)
{
.........
connect(ui.tableWidget, SIGNAL(itemDoubleClicked(QTableWidgetItem*)), this, SLOT(calendar_clicked(QTableWidgetItem*)));
}
void SmallExample::calendar_clicked(QTableWidgetItem* tableitem)
{
int column = tableitem->column();
SmallExample::row = tableitem->row();
if (column == 2) {
if (!calendar) {
calendar = new QCalendarWidget();
}
calendar->setWindowTitle("Calendar");
calendar->setWindowModality(Qt::WindowModal);
calendar->show();
connect(calendar, SIGNAL(activated(const QDate&)), this, SLOT(date_selected(const QDate&)));
}
}
void SmallExample::date_selected(const QDate&)
{
QTableWidgetItem *itemcalendar = new QTableWidgetItem;
QIcon icon(":/icon/calendar.jpg");
itemcalendar->setIcon(icon);
SmallExample::ui.tableWidget->setItem(SmallExample::row, 0, itemcalendar);
QString text= SmallExample::calendar->selectedDate().toString("dd.MM.yyyy");
QTableWidgetItem *datetext = new QTableWidgetItem;
datetext->setText(text);
SmallExample::ui.tableWidget->setItem(SmallExample::row, 0, datetext);
SmallExample::calendar->close();
}
I know when datetext is added, the itemcalendar will be overwritten, so it does not appear any more. I want both of which will appear, but I don't know how to solve this. Thanks in advance!
update code:
void SmallExample::date_selected(const QDate&)
{
QTableWidgetItem *itemcalendar = SmallExample::ui.tableWidget->item(SmallExample::row, 2);
QIcon icon(":/icon/calendar.jpg");
itemcalendar->setIcon(icon);
QString date = SmallExample::calendar->selectedDate().toString("dd.MM.yyyy")
itemcalendar->setText(date);
}

Answer 1

Maybe you should consider using a QStyledItemDelegate for the second column of your table.
See this post and the star example from Qt documentation.
Here is a code sample:
class CalendarDelegate : public QStyledItemDelegate
{
public:
CalendarDelegate (QObject *parent = 0) :
QStyledItemDelegate(parent)
{
}
void CalendarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
painter->save();
QIcon icon(":/icon/calendar.jpg");
QSize iconsize = option.decorationSize;
painter->drawPixmap(0.0, 0.0, icon.pixmap(iconsize.width(), iconsize.height()));
painter->restore();
}
}
And then in the SmallExample class constructor:
SmallExample::ui.tableWidget->setItemDelegateForColumn(2, new CalendarDelegate(this));

Answer 2

If you set one time only icon and another time text, you can try such code, with item method:
QTableWidgetItem *itemcalendar = new QTableWidgetItem;
QIcon icon(":/icon/calendar.jpg");
itemcalendar->setIcon(icon);
SmallExample::ui.tableWidget->setItem(SmallExample::row, 2, itemcalendar);
...
QTableWidgetItem* itemcalendar = SmallExample::ui.tableWidget->item(SmallExample::row, 2);
itemcalendar->setText(date);

Answer 3

This is how your code should look like:
QTableWidgetItem *itemcalendar = new QTableWidgetItem;
QIcon icon(":/icon/calendar.jpg");
itemcalendar->setIcon(icon);
itemcalendar->setText(SmallExample::calendar->selectedDate().toString("dd.MM.yyyy"));
SmallExample::ui.tableWidget->setItem(SmallExample::row, 2, itemcalendar);
I have just tried this example and it works as expected (both text and icon appears in item) no matter in which order I set icon and text.
You don't have to create new item evety time you choose date in date_selected, use item as Kirill suggested:
QTableWidgetItem *itemcalendar = SmallExample::ui.tableWidget->item(SmallExample::row, 2);
QString date = SmallExample::calendar->selectedDate().toString("dd.MM.yyyy");
itemcalendar->setText(date);