Hi all.
I've got a problem and hope you can help me.
I have multiple QQmlWidgets where different instances of same components
should be shown.
The components are created at runtime and use specific properties from
it's parent widget.
The problem is, that there are multiple nested items in those
components, so they are loading very slow.
I've decided to load them all to QQmlEngine at application preload
stage, and after just create them when necessary.
So all my QQmlWidgets got same QQmlEngine and same root context.
To differ properties of different widgets I'm creating every instance of
component in separate context (one per QQmlWidget).
After creating I'm setting parent item of newly created object to root
item of QQmlWidget;
The problem is that the root item is referenced in the dynamically
created objects and they could not find it.
Can you suggest any solution? I'm posting simplified version of my code
below.
---main.cpp
QQmlEngine* e = new QQmlEngine;
QWidget* ww1 = new QWidget;
QWidget* ww2 = new QWidget;
QQuickWidget* w1 = new QQuickWidget(e, ww1);
QQuickWidget* w2 = new QQuickWidget(e, ww2);
w1->setSource(QUrl::fromLocalFile("main.qml"));
w2->setSource(QUrl::fromLocalFile("main.qml"));
QQmlComponent* comp = new QQmlComponent(e, "comp.qml");
QQmlContext* c1 = new QQmlContext(e);
QQmlContext* c2 = new QQmlContext(e);
QQuickItem* it1 = qobject_cast<QQuickItem*>(comp->create(c1));
it1->setParentItem(w1->rootObject());
QQuickItem* it2 = qobject_cast<QQuickItem*>(comp->create(c2));
it2->setParentItem(w2->rootObject());
ww1->show();
ww2->show();
--- main.qml
Rectangle {
id: root
}
--- comp.qml
Rectangle {
anchors.top : root.top
}
--- the error
comp.qml - ReferenceError: root is not defined
Thanks in advance.
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