Overriding paintEvent in widget which was created in designer and has own child widgets
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Can anybody help me. I am developing an application. It has a widget created in designer. It has QTableView widget and 3 QLabel widgets. I want to display some text, when a model of QTableView has 0 rows. For example "There is no rows in your table". I have overrided paintEvent for my widget. In this event I am drawing fill rectangle with text. But the problem is in child widgets. Child widgets have own paintEvent functions which are called always. I need that these functions are never called when my model has 0 rows. I have tried to use installEventFilter for all child widgets. But it has not helped.
Thanks in advance -
No. There is not what I want. It's just simple.
I have several widgets with the same behaviours. For example: one widget display users, second display cars and so on. Every widget has own QTableView and. Also these widgets have another gui elements like labels combo boxes and so on. I want manually paint the whole widget (with child elements) when QTableView's model has 0 row. I want all my widgets have the same behavior and are painted with one function like:
@void CommonFunctions::paintEmptyWidget(QWidget* widget,
QRect rect,
QString text,
QString noteText)
{
QPainter painter;
painter.begin(widget);
painter.setPen(Qt::black);
painter.setFont(QFont("Tahoma", 16));
painter.drawText(rect, Qt::AlignCenter, text);
painter.end();
}@This function will called in paintEvent(QPaintEvent*) of every widget. if I override paintEvent in a simple widget (which was not created in Designer) it works fine. But if I override paintEvent in widget with UI class it works not so as I want. In this case paintEvent works, but besides this, paintEvent functions of all child widgets are called. But I don't want it.
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Yes. But I can't override the paintEvent of each child widget, because they were created in Designer (with UI). So maximum I can do - is try to install eventFilter on every widget like this:
@MyWidget::MyWIdget(QWidget parent) :
QWidget(parent)
{
QList<QWidget > widgets = findChildren<QWidget>();
foreach(QWidget widget, widgets)
{
widget->installEventFilter(this);
}
}MyWidget::eventFilter(QObject* object, QEvent* event)
{
if(event->type() == QEvent::Paint)
{
QPaintEvent* paintEvent = static_cast<QPaintEvent*>(event);
if(_rowCount == 0)
paintEmptyWidget(widget, /// Function like I describe above
paintEvent->rect(),
"Emty text",
"Note text");
return true;
}
return QWidget::eventFilter(object,event);
}
@
But it doesn't work as I need.[quote author="shoyeb" date="1329193466"]then u need to override the paint event of each child widget...
i am not sure that this will work but atleast u can try..[/quote]