I test a simple QML(Qt sdk version 5.3.2) program like this
import QtQuick 2.3
import QtQuick.Controls 1.2
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
id: appWin
Text {
text: qsTr("Hello World")
anchors.bottom: parent.bottom
}
}
I want the text will be layed on the bottom of application window, that's work. But if I change anchors.bottom: parent.bottom
to anchors.bottom: appWin.bottom
(via id), anchors not work anymore, is this a bug?
ApplicationWindow
does not ultimately derive from Item
, so it does not have an anchors
property that's why using the window's id
does not work. So why does using parent
? Because the children you define in an ApplicationWindow
become children of an intermediate Item
called contentItem
:
If you assign an Item to the data list, it becomes a child of the Window's contentItem, so that it appears inside the window. The item's parent will be the window's contentItem, which is the root of the Item ownership tree within that Window. ... It should not generally be necessary to refer to the data property, as it is the default property for Window and thus all child items are automatically assigned to this property.
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