QML and Qt Quick

I suggest you try this simple "example":http://doc-snapshot.qt-project.org/qdoc/qml-qtquick-shadereffect.html first. and then try other examples. @ import QtQuick 2.0 Rectangle { width: 200; height: 100 Row { Image { id: img; sourceSize { width: 100; height: 100 } source: "qt-logo.png" } ShaderEffect { width: 100; height: 100 property variant src: img vertexShader: " uniform highp mat4 qt_Matrix; attribute highp vec4 qt_Vertex; attribute highp vec2 qt_MultiTexCoord0; varying highp vec2 coord; void main() { coord = qt_MultiTexCoord0; gl_Position = qt_Matrix * qt_Vertex; }" fragmentShader: " varying highp vec2 coord; uniform sampler2D src; uniform lowp float qt_Opacity; void main() { lowp vec4 tex = texture2D(src, coord); gl_FragColor = vec4(vec3(dot(tex.rgb, vec3(0.344, 0.5, 0.156))), tex.a) * qt_Opacity; }" } } } @

"Overview of the new features in Qt Quick":http://blog.qt.digia.com/blog/2013/06/21/overview-of-the-new-features-in-qt-quick/ bq. Jens Bache-Wiig says: June 21, 2013 at 22:26 Sure for instance: anchors.margins: Qt.platform.os === "mac" ? 12 : 4 Alternatively you can use this in a loader to load different files based on platform.

You can return QVariantList, "QVariantList and QVariantMap to JavaScript Array and Object":http://qt-project.org/doc/qt-5/qtqml-cppintegration-data.html

Well then you can use the "contentItem":http://qt-project.org/doc/qt-5.0/qtquick/qml-qtquick2-flickable.html#contentItem-prop and get the childrens and then access its x and y. E.g @ listview.contentItem.children[1].x listview.contentItem.children[1].y @ This gives the item a index 1 in ListView.

it turns out it's all because of my dropshadow code like this: @ DropShadow { id: rectShadow; anchors.fill: source cached: true; verticalOffset: 0; radius: 8.0; samples: 16; color: "#80000000"; smooth: true; source: container; } @ I have drawn a shadow around the container(window),webview was in within the window of course,so I still don't know why it's happened,but I can resolve it by simply comment these codes,it works fine now. Thanks to my rubber duck

Found the solution, use loader to load the ComboBox when insert or "Your text to link here...":http://stackoverflow.com/questions/20833809/initialize-error-of-combobox-cannot-read-property-constructor-of-undefined#comment31247640_20833809

Thanks, but childrenRect.width can (should) not change because it is not dependant on its parents width. If it were then we would have a binding loop.

Ok, I found: @ QQmlContext *context1 = new QQmlContext(engine, qApp); context1->setContextProperty("myList", modelList_1 ); QQmlComponent component1(engine, QUrl::fromLocalFile("myScene.qml"), this); QObject object1 = component1.beginCreate( context1 ); qobject_cast<QQuickItem>(object1)->setParentItem( window1 ); component1.completeCreate(); QQmlContext *context2 = new QQmlContext(engine, qApp); context2->setContextProperty("myList", modeList_2 ); QQmlComponent component2(engine, QUrl::fromLocalFile&#40;"myScene.qml"&#41;, this&#41;; QObject *object2 = component2.beginCreate( context2 ); qobject_cast<QQuickItem*>(object2)->setParentItem( window2 ); component2.completeCreate(); QQmlContext *context3 = new QQmlContext(engine, qApp); context3->setContextProperty("myList", modelList_3 ); QQmlComponent component3(engine, QUrl::fromLocalFile&#40;"myScene.qml"&#41;, this&#41;; QObject *object3 = component3.beginCreate( context3 ); qobject_cast<QQuickItem*>(object3)->setParentItem( window3 ); component3.completeCreate(); @ So, I don't have of name conflict (each scene uses "myList" model name, but shows differents data). But why it isn't possible to set property into internal context? There is an explication?

@ import QtQuick 2.0 ListModel { dynamicRoles: true ListElement { someitems:[ ListElement{ recordID: Math.round(Math.random()*1000) eqType: 0 message: "some text" }, ListElement{ recordID: Math.round(Math.random()*1000) eqType: 0 message: "some text" }, ListElement{ recordID: Math.round(Math.random()*1000) eqType: 0 message: "some text" } ] } } @

Problem fixed, i had to delete anchors.fill: parent from Listview1 and Listview2 :)

color: "#00000000" // ARGB fully transparent

Thanks for answer, I solved this problem, I using qt for android apps, and now qt doesn't support audio engine for android,

Did you use "StackView":http://qt-project.org/doc/qt-5/qml-qtquick-controls-stackview.html ?

[quote author="ThomasHartmann" date="1387619330"]I recently did some research about using llvmpipe for Qt Quick 2 on Windows. So far it looks very promising. Performance is reasonable and even the shader examples run. Here are the instructions how to build llvmpipe on Windows: https://sites.google.com/site/buildllvmpipe/ llvmpipe on Windows is basically another opengl32.dll that you have to use instead of the system one. I would recommend renaming it though, to make sure your application uses the correct dll in all cases. [/quote] any prebuild dll for win7 and winXP?Besides, where should we place the dll?What name should we give the dll if we want to rename it?Thanks

See https://bugreports.qt-project.org/browse/QTBUG-34712 It a bug in Item.contains() :-(