Description

Gnome::Gtk4::Fixed places its child widgets at fixed positions and with fixed sizes.

Gnome::Gtk4::Fixed performs no automatic layout management.

For most applications, you should not use this container! It keeps you from having to learn about the other GTK containers, but it results in broken applications. With Gnome::Gtk4::Fixed, the following things will result in truncated text, overlapping widgets, and other display bugs:

• Themes, which may change widget sizes.

• Fonts other than the one you used to write the app will of course change the size of widgets containing text; keep in mind that users may use a larger font because of difficulty reading the default, or they may be using a different OS that provides different fonts.

• Translation of text into other languages changes its size. Also, display of non-English text will use a different font in many cases.

In addition, Gnome::Gtk4::Fixed does not pay attention to text direction and thus may produce unwanted results if your app is run under right-to-left languages such as Hebrew or Arabic. That is: normally GTK will order containers appropriately for the text direction, e.g. to put labels to the right of the thing they label when using an RTL language, but it can’t do that with Gnome::Gtk4::Fixed. So if you need to reorder widgets depending on the text direction, you would need to manually detect it and adjust child positions accordingly.

Finally, fixed positioning makes it kind of annoying to add/remove UI elements, since you have to reposition all the other elements. This is a long-term maintenance problem for your application.

If you know none of these things are an issue for your application, and prefer the simplicity of Gnome::Gtk4::Fixed, by all means use the widget. But you should be aware of the tradeoffs.

Class initialization

new

:native-object

Create an object using a native object from elsewhere. See also Gnome::N::TopLevelSupportClass.

multi method new ( N-Object :$native-object! )

new-fixed

Creates a new Gnome::Gtk4::Fixed.

method new-fixed ( --> Gnome::Gtk4::Fixed \)

Methods

get-child-position

Retrieves the translation transformation of the given child Gnome::Gtk4::Widget in the Gnome::Gtk4::Fixed.

See also: .get-child-transform().

method get-child-position ( N-Object() $widget, Num() $x, Num() $y )

• $widget; a child of $fixed.

• $x; (transfer ownership: full) the horizontal position of the $widget.

• $y; (transfer ownership: full) the vertical position of the $widget.

get-child-transform

Retrieves the transformation for $widget set using .set-child-transform().

method get-child-transform ( N-Object() $widget --> N-Object )

• $widget; a Gnome::Gtk4::Widget, child of $fixed.

Return value; a Gnome::Gsk4::N-Transform.

move

Sets a translation transformation to the given $x and $y coordinates to the child $widget of the Gnome::Gtk4::Fixed.

method move ( N-Object() $widget, Num() $x, Num() $y )

• $widget; the child widget.

• $x; the horizontal position to move the widget to.

• $y; the vertical position to move the widget to.

put

Adds a widget to a Gnome::Gtk4::Fixed at the given position.

method put ( N-Object() $widget, Num() $x, Num() $y )

• $widget; the widget to add.

• $x; the horizontal position to place the widget at.

• $y; the vertical position to place the widget at.

remove

Removes a child from $fixed.

method remove ( N-Object() $widget )

• $widget; the child widget to remove.

set-child-transform

Sets the transformation for $widget.

This is a convenience function that retrieves the Gnome::Gtk4::FixedLayoutChild instance associated to $widget and calls .set-transform() in class Gnome::Gtk4::FixedLayoutChild.

method set-child-transform ( N-Object() $widget, N-Object $transform )

• $widget; a Gnome::Gtk4::Widget, child of $fixed.

• $transform; the transformation assigned to $widget to reset $widget's transform