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ColumnLayout is a subclass of DialogLayout. If you want you can easily add it to another DialogLayout, but then you need to add it to it's groups like any other widget.

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TWL - The Themable Widget Library

ok, thanks! This seems to work!



edit:

It seems to work the same if this is commented or not:


What exactly does that do?

edit 2:

How do I center or put these fields closer to right border? I'd also like to make vertical gaps smaller:
default:


would like (bad photoshop):

You should really try reading the javadoc.

As for adding a row without adding any widgets to it - it's kind of useless waste of CPU and memory.

Your screenshot shows only 2 widgets per row - so you should create a Columns object with only 2 fields: "label", "single-adjuster"
As they both start with "label" it will end up with a merged column - eg all labels are equal wide.
But as the 2nd column is different, it will take the same width as the other 3 columns.

Now you only need to make sure that your adjusters can be stretched (setting maxWidth to 32767 or the constant MAX).
Alternative you can use the widget alignment value FILL to force the widgets to take the whole space (but that might also stretch them vertically).

As for the vertical gap between rows - you can either change the default gap size, or you can add another vertical gap between rows (see getRootPanel).

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TWL - The Themable Widget Library

I don't understand this part.

There is no setMaxWidth() or maxWidth variable, so I tried myWidget.setMaxSize(32767 ,myWidget.getHeight()) on the widget; but looks the same.

I don't see a alignment setting or variable in Widget.

The maxWidth must be set in the theme. It's default value is 0 which means "do not stretch and use preferred size" and a value > 0 sets the maximum width that widget can get.

The widget alignment is set in the DialogLayout / ColumnLayout class. Either using DialogLayout.setWidgetAlignment() after adding the widget or directly when adding it using eg with ColumnLayout .Row.add(Widget, Alignment).

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TWL - The Themable Widget Library