Details
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Bug
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Resolution: Done
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P3: Somewhat important
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5.11.0
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None
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f5f36b0db64e77822ef3053245c993ed14949192 (qt/qtquickcontrols2/5.12)
Description
https://doc.qt.io/qt-5/qml-qtquick-controls2-pane.html#content-sizing says:
If only a single item is used within a Pane, it will resize to fit the implicit size of its contained item. This makes it particularly suitable for use together with layouts.
It then shows an example of this:
Pane {
ColumnLayout {
anchors.fill: parent
CheckBox { text: qsTr("E-mail") }
CheckBox { text: qsTr("Calendar") }
CheckBox { text: qsTr("Contacts") }
}
}
What it doesn't mention is that if the contentItem has no implicitWidth/Height, it will use the implicitWidth/Height of the first child item of contentItem. This previously happened here in QML, and happens here in C++ in 5.12.
This surprised me, as I understand that the following code would result in the contentWidth being equal to the implicitWidth of the text:
import QtQuick 2.10 import QtQuick.Window 2.10 import QtQuick.Controls 2.3 Window { id: root width: 400 height: 440 visible: true title: pane.contentWidth Pane { id: pane contentItem: Label { text: "Info!" anchors.centerIn: parent } } }
But I wouldn't expect it to use the Label's implicitWidth here:
import QtQuick 2.10 import QtQuick.Window 2.10 import QtQuick.Controls 2.3 Window { id: root width: 400 height: 440 visible: true title: pane.contentWidth Pane { id: pane contentItem: Item { Label { text: "Info!" anchors.centerIn: parent } } } }
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