How to make tab's item to be created programmatically? - qt

Question

I dynamically add tabs to TabView and pass tab's item to c++ for futher processing. The problem is that method tabview.getTab(tabview.getTab(tabview.count-1).item) returns null for the which index is >0. Here is code:
//main.qml
import QtQuick 2.2
import QtQuick.Controls 1.1
import QtQuick.Layouts 1.1
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
signal tabAdded(variant c)
ColumnLayout{
anchors.fill: parent
TabView{
visible: true
id:tabview
Layout.fillHeight: true
Layout.fillWidth: true
}
Button{
text: "add tab"
onClicked:{
var c = Qt.createComponent("Tab.qml");
tabview.addTab("tab", c)
// tabAdded(tabview.getTab(tabview.count-1).item)
console.log(tabview.getTab(tabview.count-1).item)
}
}
}
}
//Tab.qml
import QtQuick 2.0
import QtQuick.Controls 1.1
Item{
signal tabButtonClicked()
anchors.fill: parent
Button{
text: "tabButton"
anchors.centerIn: parent
onClicked: tabButtonClicked()
}
}
I figured out that tabview.getTab(index).item returns apropriate value if tab(index) was activated manually (by clicking with mouse on it). It seems like tab's item is created only when user firstly activate tab. So, how to make item to be created immediately after tab creation?

Answer 1

Every tab in TableView is represented by a Tab component that inherits from Loader component. If you want force the Tab to load its contents, just set active property to true. This property controls when the component must be loaded. So now, your button code looks like this:
Button{
text: "add tab"
onClicked:{
var c = Qt.createComponent("Tab.qml");
tabview.addTab("tab", c);
var last = tabview.count-1;
tabview.getTab(last).active = true; // Now the content will be loaded
console.log(tabview.getTab(last).item);
}
I hope this help you.