QML and Qt Quick

space is usually irrelevant, especially behind an assignment :

I got it working. The problem was I had various objects in the pane that were competing for available height (I think it confused the QML engine). This works: Pane { id: expandingRow property var hiddenContent property int collapsedHeight: 40 property bool expanded: false implicitHeight: expanded ? Math.max(implicitBackgroundHeight + topInset + bottomInset, implicitContentHeight + topPadding + bottomPadding) : collapsedHeight contentItem: ColumnLayout { id: columnLayout height: expandingRow.availableHeight width: expandingRow.availableWidth Pane { id: visiblePane Layout.preferredHeight: collapsedHeight - (expandingRow.padding * 2) Layout.preferredWidth: expandingRow.availableWidth Button { onClicked: expandingRow.expanded = !expandingRow.expanded } } Pane { id: hiddenPane contentChildren: hiddenContent visible: expandingRow.expanded Layout.preferredHeight: hiddenContent.height + (padding * 2) Layout.preferredWidth: expandingRow.availableWidth } } } Thanks to everyone who looked.

@GrecKo This is what I'm working on implementing right now. Would there be a reason to use QAbstractTableModel over QSqlQueryModel?

Use 'undefined' instead. var invalidValue = backend.GetInvalidQVar(); if (invalidValue == undefined) { console.log("Invalid"); } else { console.log("Valid"); }

@shaan7 Works like magic

@GrecKo said in Custom Model with QML_ELEMENT: Maybe try explicitly exposing QSortFilterProxyModel? struct QSortFilterProxyModelForeign { Q_GADGET QML_FOREIGN(QSortFilterProxyModel) QML_NAMED_ELEMENT(QSortFilterProxyModel) // or QML_ANONYMOUS }; I tried without success...

@GrecKo you are a life-saver. Not only is your method simpler, but it works for my cursed Singletons, too! app.aboutToQuit.connect(engine.deleteLater) or in my case (because this is a hybrid app that embeds a QML view inside a larger widgets app): QtWidgets.QApplication.instance().aboutToQuit.connect(qml_view.rootContext().engine().deleteLater)

@__mk__ said in [SOLVED] Time Conversion: Unfortunately, you cannot construct a QTime object directly from a millisecond value What about (untested) QTime QTime::fromMSecsSinceStartOfDay(int msecs) Returns a new QTime instance with the time set to the number of msecs since the start of the day, i.e. since 00:00:00. ?

Thank you so much! This gets me 95% of the way there.

You would have to build the plugin yourself and link against it.

Hi and welcome to devnet, I would suggest you take a look at Qt's network module examples. Especially the fortune client and server. This should give you a starting point.

i got it! The Solution was so simple. For the reimplementation of the QSqlRelationalTableModel i have to define the roleNames. But i doesn't misunderstood the roleTypes. The RoleTypes are pre-defined by Qt like Qt::UserRole or Qt::DisplayRole. To define roles by my self i can use the values over Qt::UserRole (like Qt::UserRole + i). I add simply the first role {Qt::DisplayRole, "display"} to my roleNames and after that my specified roleNames for the other columns. To different the roles to show the correct data yout will reimplement data(...) and figure it out, which roleName the ui be asking for. That's all

what you need to do is install QT design Studio, and make the User Interface there

Thanks @SGaist I will try to post it there then

@bidjiz said in Implementing proper C++ model for QML: Is also important. It should not be on stack. It can be on the stack, it just has to be constructed before the engine.