Hello guys !
It might be useful to use qmlRegister**Type (uncreatable, singleton etc.) to
expose C++ components to QML. But if you really want to use rootContext()-
>setContextProperty, you have to be cautious.
Actually, if you pass the qml file to the view before registering C++
components, the QML components won't be able to see the C++ ones, so you have
to call setContextProperty before calling setSource (or calling the
createView("main.qml") method).
You have to call the parameter-less method createView(), and then, call
setView(QQuickView *, QString) to pass the source QML file.
But beware, there is a bug in the template. See
https://lists.sailfishos.org/pipermail/devel/2013-August/000529.html.
Hopes it helps (because I'm not very clear in this mail)
Cheers,
Lucien
Le dimanche 4 août 2013 17:05:01 christopher.l...@thurweb.ch a écrit :
> Hi Martin
>
> Curiouser and Curiouser!
>
> Just to be sure, I went back and tested your suggestion in a demo
> project based on the default "Hello Sailors" new project template.
>
> Here I pass the c++ property cppproperty with the value "Hello World".
> In the QML FirstPage this is concatenated to the "Hello Sailors" label
> text.
>
> I still get this error:
> file:///opt/sdk/setContextPropertyDemo/usr/share/setContextPropertyDemo/page
> s/FirstPage.qml:34: ReferenceError: cppproperty is not defined
>
> Yet the app displays "Hello Sailors: Hello world".
>
> So a property can be passed as you suggested, it can be used. The
> error must be wrong!
>
> Chris
>
> P.s you test the same by creating a default new Sailfish project, and
> replacing the main.cpp and FirstPage.qml with the code below.
>
>
> //start main.cpp
> #include <QGuiApplication>
> #include <QQuickView>
> #include <QQmlContext>
>
> #include "sailfishapplication.h"
>
> Q_DECL_EXPORT int main(int argc, char *argv[])
> {
> QScopedPointer<QGuiApplication>
> app(Sailfish::createApplication(argc, argv));
> QScopedPointer<QQuickView> view(Sailfish::createView("main.qml"));
> view->rootContext()->setContextProperty("cppproperty", "Hello world");
> Sailfish::showView(view.data());
>
> return app->exec();
> }
> //end main.cpp
>
>
> //start FirstPage.qml
> import QtQuick 2.0
> import Sailfish.Silica 1.0
> import Sailfish.Silica.theme 1.0
>
>
> Page {
> id: page
>
> // To enable PullDownMenu, place our content in a SilicaFlickable
> SilicaFlickable {
> anchors.fill: parent
>
> // PullDownMenu and PushUpMenu must be declared in
> SilicaFlickable, SilicaListView or SilicaGridView
> PullDownMenu {
> MenuItem {
> text: "Show Page 2"
> onClicked: pageStack.push(Qt.resolvedUrl("SecondPage.qml"))
> }
> }
>
> // Tell SilicaFlickable the height of its content.
> contentHeight: childrenRect.height
>
> // Place our content in a Column. The PageHeader is always
> placed at the top
> // of the page, followed by our content.
> Column {
> width: page.width
> spacing: Theme.paddingLarge
> PageHeader {
> title: "UI Template"
> }
> Label {
> x: Theme.paddingLarge
> text: "Hello Sailors: " + cppproperty
> color: Theme.secondaryHighlightColor
> font.pixelSize: Theme.fontSizeLarge
> }
> }
> }
> }
> //end FirstPage.qml
>
> Zitat von "Martin Grimme" <martin.gri...@gmail.com>:
> > Hi,
> >
> > you don't want to set the context property on the
> > QmlApplicationViewer, which was dead Nokia code to target Symbian and
> > Harmattan, anyway.
> > QmlApplicationViewer was derived from QmlView, where it got the
> > rootContext() method from.
> >
> > With Qt5, QmlView was renamed to QQuickView. And when using the
> >
> > functions from sailfishapplication.h, you get a QQuickView*, e.g.:
> > QScopedPointer<QQuickView> view(Sailfish::createView("main.qml"));
> > view->rootContext()->setContextProperty("platform", platformId);
> >
> > Martin
> >
> > 2013/8/4, christopher.l...@thurweb.ch <christopher.l...@thurweb.ch>:
> >> Hi all
> >>
> >> What is the recommended way to pass simple c++ properties from the
> >> main.cpp to the QML part of a project using the Qt 5 Alpha?
> >>
> >> In the good old days of the first Alpha, I used to do this Harmattan
> >> style using
> >>
> >> QmlApplicationViewer viewer;
> >> viewer.rootContext()->setContextProperty("platform", platformId);
> >>
> >> This would make the c++ property platformId available to my qml code
> >> as the property platform.
> >>
> >> Now with Qt5 / Alpha 2 the QmlApplicationViewer is no longer created.
> >>
> >> The tutorial linked below suggests that the QmlApplicationViewer files
> >> could be ported to Qt5, so I guess I could grab these files from an
> >> old Harmattan project and do that.
> >>
> >> https://qt-project.org/doc/qt-5.0/qtdoc/portingqmlapp.html
> >>
> >> But somehow that feels like carting old baggage around.
> >>
> >> Is their a Sailfish native way of doing the same?
> >>
> >> Thanks
> >>
> >> Chris
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> SailfishOS.org Devel mailing list
>
> _______________________________________________
> SailfishOS.org Devel mailing list
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