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I am creating a print layout in QGIS. I created a rectangle and I would like to fill it with a line pattern, in such a way that there are exactly five repetitions of the pattern through its height. However, QGIS enables me to choose the spacing, not the number of repetitions, so I would like to use the field calculator to specify height_of_this_rectangle / 4 as spacing.

The problem is that I don't understand how to access the height of the rectangle as a variable in the field calculator expression.

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You can calculate the height of the rectangle using the following expression:

bounds_height( $geometry)

This will calculate the maximum height of the bounding box of your geometry

enter image description here

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  • I cannot use $geometry in print layout mode. It evaluates to NULL, so that bounds_height cannot extract anything useful from it. Does $geometry work for you in print layout mode?
    – Giovanni Mascellani
    Sep 14, 2020 at 15:12
  • Is the rectangle that you are considering to use a geometry contained in a layer or a simple shape created in the layout?
    – Val P
    Sep 14, 2020 at 16:22
  • It is a rectangle shape created in the print layout manager, so the second one that you say.
    – Giovanni Mascellani
    Sep 15, 2020 at 6:29

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