QtQuick 2.0: Unable to find a renderable master window

Peter K

Whenever I try some example files that use the new features of QtQuick 2.0, the window pops up at minimum (incorrect) size and stays blank after resizing. The debugger shows the following error, showing that it does not recognize certain QtQuick 2.0 properties and that something window related goes wrong:
@
file:///D:/Documents/Visual Studio 2012/Projects/Qt5Test/particles_example_02.qml:63:13: Cannot assign to non-existent property "speed"
speed : AngleDirection { angle: 270; angleVariation: 10; magnitude: 100}
^
Remove me: fixing toplevel window flags
Unable to find a renderable master window QQuickView(0x6d2388) when trying to render QQuickView(0x6d2388)
@
The Qml and C++ source are provided below.

I have compiled the Qt 5.0.0 RC2 source using the MSVC 2012 makespec using
@
configure -debug-and-release -opensource -mp -nomake tests
nmake
@

The process did not en in an error.

However the same error shows up in Qt Creator when using the ready made libraries for MSVC 2010, using the initial code when creating a QtQuick 2.0 project, having only modified the qml source file.

Qml Source:
@
import QtQuick 2.0
import QtQuick.Particles 2.0

Rectangle {
id: root
width: 360
height: 600
color: "black"

ParticleSystem {
    anchors.fill: parent

    ImageParticle {
        source: "resources/particle.png"
        colorVariation: 1.0
    }

    Emitter {
        height: 10; width: 10
        anchors.bottom: parent.bottom
        anchors.horizontalCenter: parent.horizontalCenter

        speed : AngleDirection { angle: 270; angleVariation: 10; magnitude: 100}
        lifeSpan: 8000
        sizeVariation: 5

    }

    Gravity {
       anchors.fill: parent 
angle: 90
       acceleration: 15
    }
}

}
@

C++ source:
@
#include <QtGui>
#include <QtQuick>

int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QQuickView* view = new QQuickView;
view->setSource(QUrl("particles_example_02.qml"));
view->show();

QObject::connect(view->engine(), SIGNAL(quit()), &app, SLOT(quit()));

return app.exec();
}
@

Zamx

I don't know if this will fix your problem, but the configure option -debug-and-release is only available for mac.

416365416c

[quote author="Peter K" date="1355652408"]Whenever I try some example files that use the new features of QtQuick 2.0, the window pops up at minimum (incorrect) size and stays blank after resizing. The debugger shows the following error, showing that it does not recognize certain QtQuick 2.0 properties and that something window related goes wrong:
@
file:///D:/Documents/Visual Studio 2012/Projects/Qt5Test/particles_example_02.qml:63:13: Cannot assign to non-existent property "speed"
speed : AngleDirection { angle: 270; angleVariation: 10; magnitude: 100}
^
@

[/quote]

That property in Emitter was renamed to velocity months ago. Where did you get that example using "speed"?

Peter K

"Developer-Guides":http://qt-project.org/wiki/Developer-Guides under "Particles and Graphics Effects in Qt Quick 2". Download link: "here":http://get.qt.nokia.com/developerguides/qteffects/particles_src.zip.