2016-06-08 9:46 GMT+02:00 Elvis Stansvik <elvst...@gmail.com>:
> Hi all,
>
> Consider the following:
>
> import QtQuick 2.4
> import QtQuick.Window 2.2
> import QtQuick.Controls 1.3
>
> Window {
> width: 500
> height: 500
>
> ListModel {
> id: libraryModel
> ListElement {
> title: "A Masterpiece"
> }
> }
>
> TableView {
> model: libraryModel
> anchors.fill: parent
>
> onModelChanged: {
> console.log('model changed');
> console.log('rowCount: ' + rowCount);
> console.log('columnCount: ' + columnCount);
> }
>
> Component.onCompleted: model = libraryModel
>
> TableViewColumn {
> role: "title"
> title: "Title"
> }
> }
> }
>
> This will give the output:
>
> qml: model changed
> qml: rowCount: 0
> qml: columnCount: 0
> qml: model changed
> qml: rowCount: 1
> qml: columnCount: 1
>
> because for some reason, when modelChanged is initially emitted, the
> view has no rows/columns yet, but when it is subsequently set (in
> Component.onCompleted), it has. I find this quite strange, and it
> prevents me from doing e.g. getColumn(0).resizeToContents() in
> onModelChanged without checking if there's a column (I know that is
> sloppy anyway, since the model may have been set to null, but
> still...).
And even disregarding the sloppiness issue, it also forces me to do
the model = libraryModel in Component.onCompleted, so that the model
is set a second time.
Elvis
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