——updated dynamic part to at least compile, updated code and download ——-
Hello !
(Using Qt 5.3)
I tried to create a compact sample, but its still too big to post all the files here separately.
Here is a link to “bindtest.zip” via uploaded.com, beware of spam/ugly pix:
http://ul.to/lqemy5jx
Okay, i will try to post the essence of the files here anyways (6000 char limit)
I tried to create a simple Class in C++ containing a StringList and an index.
I Instantiated two Objects of this Class and exposed them via “setContextProperty”
This should be used in QML to initialize a ListView and to be in sync with it.
So whenever a User changes the index in QML, C++ should be notified AND vice versa.
So when i create two Component qml files using the hardwired names set in “setContextProperty” it seems to work fine.
But for the life of me i cannot create a single component file and pass the DataObject to it as a parameter, i simply do not know how to do it, although i tried.
My “final” target ist to create a QML Object dynamically and pass the DataObject to it, this does not work either :-(
So here it comes, code snippets of my sample Project:
Declaring my oh-so-simple Class (DataObject.h)
...
Q_PROPERTY( int index MEMBER m_index NOTIFY indexChanged )
public slots:
int count() const { return m_Elements.count(); }
QString at(int idx) const { return m_Elements.at(idx); }
public:
void setIndex(int theInt) { m_index = theInt; }
signals:
void indexChanged(int);
public: // too lazy to write accessors for this sample, so make it public
QStringList m_Elements;
private:
int m_index;
...
Registering it in main.cpp:
qmlRegisterType<DataObject>("bindtestTypes", 1, 0, "DataObject");
Here is the part of “dialog.cpp” that initializes and exposes two DataObects:
//preparing first list
m_firstDO.m_Elements = QStringList() << "A" << "B" << "C" << "D";
m_firstDO.setIndex(0);
...
//publish the 2 Dataobjects
m_engine.rootContext()->setContextProperty( "cppDataList_1", &m_firstDO);
m_engine.rootContext()->setContextProperty( "cppDataList_2", &m_secondDO);
Here is the QML file “ShowLists.qml” that should simply show the 2 ListVies on Top of each other, i commented the 2 NOT working approaches that i would love to work, especially the dynamic one:
import QtQuick 2.2
import QtQuick.Window 2.1
import bindtestTypes 1.0
Window {
visible: true
width: 200
height: 400
Rectangle{
anchors.fill: parent
//dynamic: does not work :-(
//needs click to be activated
// Rectangle{
// id:upperList
// anchors.top: parent.top;
// anchors.left: parent.left
// width:200
// height:200
// MouseArea{
// anchors.fill: parent
// onClicked: {
// var component = Qt.createComponent("SimpleList.qml");
// var dyncbb = component.createObject(parent, {"theDO": cppDataList_1});
// }
// }
// }
// Rectangle{
// id:lowerList
// anchors.bottom: parent.bottom;
// anchors.left: parent.left
// width:200
// height:200
// MouseArea{
// anchors.fill: parent
// onClicked: {
// var component = Qt.createComponent("SimpleList.qml");
// var dyncbb = component.createObject(parent, {"theDO": cppDataList_2});
// }
// }
// }
//static: would not be my first choice but isnt working anyways...
// SimpleList {
// id:upperList
// property DataObject theDO: cppDataList_1
// anchors.top: parent.top;
// anchors.left: parent.left
// }
// SimpleList {
// id:lowerList
// property DataObject theDO: cppDataList_2
// anchors.bottom: parent.bottom;
// anchors.left: parent.left
// }
//hardwired works, but its not workable for my rather complex project...
SimpleList1 {
id:upperList
anchors.top: parent.top;
anchors.left: parent.left
}
SimpleList2 {
id:lowerList
anchors.bottom: parent.bottom;
anchors.left: parent.left
}
}
}
So, can anyone of you help me to get this solved ??
Greetings & thanks for any help !
Nils
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