qtgui

I have a QGraphicsEllipseItem that I want to be movable and triggering signals on moving. So I subclassed QGraphicsEllipseItem and QObject and overrode the itemChange method to trigger a signal. That all seems to work but the positions that are reported seem to be relative to the old position of the item. Even if asking the item for its position seems only to retrieve the relative coordinates. Here is some code to make clear what I have done: class MyGraphicsEllipseItem: public QObject, public QGraphicsEllipseItem { Q_OBJECT public: MyGraphicsEllipseItem(qreal x, qreal y, qreal w, qreal h,

I am trying to handle exception in my Qt application, I went through a couple of posts which indicated of overriding the QApplication::notify method to handle exceptions in a efficient way in Qt. I am not sure where should I add this overriden method. Is it the mainwindow.h or main.cpp? I added the following function in my MainWindow.h: bool notify(QObject * rec, QEvent * ev) { try { return QApplication::notify(rec,ev); } catch(Tango::DevFailed & e) { QMessageBox::warning(0, "error", "error"); } return false; } When I build my project I get the following error: error: cannot call member

I need to display QLineEdit with "Browse" button at my form. When user clicks button, QFileDialog should be opened, and so on. This is pretty common thing, but I can't find ready-made solution for that. I expected in Qt Designer some widget like QFileSelect , or something like that, but found nothing similar. Should I implement it by hand? Or, what is the correct way to do this? Should I implement it by hand? Or, what is the correct way to do this? Yes, I agree with you that it is a common thing, but unfortunately you will need to implement this yourself. The good news is that you can do this

I'm currently trying to get the icon based on a file extension, but it seems like QFileIconProvider will only return an icon if it can actually read an existing file. Is there any way I can get a QIcon based off of a file extension? One alternative would be to write a temporary file with the desired extension, but that is very inefficient so I'm looking for a way around. Any help would be appreciated! Here's my solution for Windows: iconprovider.h: class IconProvider { public: static IconProvider * instance(); static QIcon fileIcon(const QString &filename); static QIcon dirIcon(); private:

In Firefox/Chrome/InternetExplorer/Safari/Opera pop-ups from the combobox expand as the content, see Firefox picture: QComboBox pop-up does not expand the content. Pop-ups are limited by the size of QComboBox , see QWebView picture: So I implemented the QComboBox::showPopup : void newQComboBox::showPopup() { int width = this->width(); this->view()->setTextElideMode( Qt::ElideNone ); const int iconSize = this->iconSize().width(); const QFontMetrics fontMetrics = this->fontMetrics(); const int j = this->count(); for( int i=0; i < j; ++i ) { const int textWidth = fontMetrics.width( this->itemText