setting arguments in reused QML file

mzimmers

Hi all -

I've looked through the docs, but didn't find quite what I wanted. I have a QML file (SortedTable.qml) that is used by several displays. I need to modify it so the parent can specify the widths of the columns.

Currently, the column widths are formatted like this:

 property int cellWidth: width / (viewModel.header().length + extraCols_)
 property real cellStretch0: cellWidth * 1.7
 property real cellStretch1: cellWidth * 0.4
 property real cellStretch2: cellWidth * 0.9
 property real cellStretch3: cellWidth
 property variant columnWidths: [cellStretch0, cellStretch1, cellStretch2, cellStretch3]

And the property columnWidths is used in various places in SortedTable.

I'd like to move the cellStretchN definitions out of SortedTable, into the parent files, but have a default value for them in SortedTable. I'm sure this can be done, but I need a pointer on how.

Thanks...

ODБOï

hi @mzimmers
If i understand the question correctly, there is nothig special to do here, you can let whatever default value in Sorted Table.qml and then reassign that value when you create SortedTable components

mzimmers

@LeLev here's what I tried:

SortedTable.qml:

Item {
  id: root
  property int cellWidth: width / (viewModel.header().length + extraCols_)
  property real cellStretch0: cellWidth
  property real cellStretch1: cellWidth
  property real cellStretch2: cellWidth
  property real cellStretch3: cellWidth

and in the parent:

  SortedTable {
      property real cellStretch0: cellWidth * 1.7
      property real cellStretch1: cellWidth * 0.4
      property real cellStretch2: cellWidth * 0.9
      property real cellStretch3: cellWidth

but it doesn't "take" (the values in the parent aren't used).

ODБOï

@mzimmers said in setting arguments in reused QML file:

SortedTable {
property real cellStretch0: cellWidth * 1.7

you are re-declaring the properties, you just need to assing the new values like this

SortedTable {
      cellStretch0: cellWidth * 1.7
     cellStretch1: cellWidth * 0.4

but i'm not sure columnWidths will be updated in the component, you might need to reassign it

mzimmers

@LeLev thank you! This works fine. And the array does indeed update -- I guess it's created on-the-fly when the screen is invoked.

Thanks again for the help.

ODБOï

@mzimmers You're welcome :)
BTW "variant" qml type is obsolete. If possible, you should use "var" instead
see here https://doc.qt.io/qt-5/qml-variant.html