using alignment enum in an array

mzimmers

Hi all -

I have a multicolumn table used in several places. The caller can specify column widths by overriding some properties, which are defined as follows:

property int cellWidth: 200 // or whatever

property int widthCell0: cellWidth
property int widthCell1: cellWidth
property int widthCell2: cellWidth
property variant columnWidths: [widthCell0, widthCell1, widthCell2]

Repeater {
   Column {
      Rectangle {
         id: columnRect
         width: if (index < currentData.length) {
                  columnWidths[index]
               } else {
                  cellWidth
               }
...

This works fine. But when I attempt to apply a similar solution for alignment, I get an error.

    property int aligncell0: Text.AlignLeft
    property int aligncell1: Text.AlignRight
    property int aligncell2: Text.AlignLeft
    property int columnAligns: [alignCell0, alignCell1, alignCell2]
...
Text { // Text is a child of the Rectangle above.
   anchors.verticalCenter: parent.verticalCenter
   horizontalAlignment:
      columnAligns[index]
...

If I make my array type variant, I get this error:

file:///home/mzimmers/git/KOL-UI/src/lib/qml/SortedTable.qml:234: TypeError: Cannot read property '3' of undefined

If I make my array type int, I don't get an error, but it doesn't work. Can someone explain what I'm doing wrong?

Thanks...

kshegunov

@mzimmers said in using alignment enum in an array:

property int columnAligns: [alignCell0, alignCell1, alignCell2]

This stores the size of the array. So you're trying to use an int as an array so the QML engine chokes on it.

property array columnAligns ...

should fix it.

Here's my favorite talk on that subject: https://www.destroyallsoftware.com/talks/wat

PS. Also JS is case sensitive. aligncell0 != alignCell0

mzimmers

@kshegunov property array seems broken:

    property int alignCell0: Text.AlignLeft
    property int alignCell1: Text.AlignRight
    property int alignCell2: Text.AlignLeft
    property int alignCell3: Text.AlignLeft
    property int alignCell4: Text.AlignLeft
    property int alignCell5: Text.AlignLeft
    property array columnAligns: [alignCell0, alignCell1, alignCell2, alignCell3, alignCell4, alignCell5]

Gives me:

file:///home/mzimmers/git/KOL-UI/src/lib/qml/SortedTable.qml:42 Expected property type

line 42 is the property array.

Thanks for catching my Case typos...

kshegunov

@mzimmers said in using alignment enum in an array:

line 42 is the property array.

Yes, I'm a dum-dum. Just use var is what I meant to write, but failed miserably.

mzimmers

Right you are (about var, not the dum-dum part). It works fine now. Thanks!

I also changed my variant (in the first example) to var, as I discovered today that variant is obsolete. FWIW...

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using alignment enum in an array