Retrieving and Setting a Window's Position

The position of a Window is a set of screen coordinates that indicate the location of the GUI window's top-left corner relative to the virtual screen.

position

You can retrieve a window's current position using the position method:

window = Window.new
pos = window.position
pos[:x] # the x-coordinate of the position
pos[:y] # the y-coordinate of the position

The returned position is a NamedTuple(x: Int32, y: Int32).

position must be called from within a run block definition.

set_position and position=

A window's position can be set manually in your application's logic using the set_position method:

window = Window.new
window.set_position(100, 100) # sets the window's top-left corner at (100, 100)

Of course, you can also use named arguments:

window.set_position(x: 100, y: 100)

set_position accepts two distinct arguments:

• x, the x-coordinate of the desired position.
• y, the y-coordinate of the desired position.

Both arguments are of type Int32.

Alternatively, you can set a window's position with the position= method to achieve the same thing:

window.position = {x: 100, y: 100} # sets the window's top-left corner at (100, 100)

position= accepts only one argument:

• pos, the desired location of the window's top-left corner.

pos is of type NamedTuple(x: Int32, y: Int32)

Both set_position and position= must be called from within a run block definition.