Class Fixed

java.lang.Object
org.javagi.base.ProxyInstance
org.gnome.gobject.TypeInstance
org.gnome.gobject.GObject
org.gnome.gobject.InitiallyUnowned
org.gnome.gtk.Widget
org.gnome.gtk.Fixed
All Implemented Interfaces:
Accessible, Buildable, ConstraintTarget, Proxy
@Generated("org.javagi.JavaGI") public class Fixed extends Widget implements Accessible, Buildable, ConstraintTarget

Places its child widgets at fixed positions and with fixed sizes.

GtkFixed 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 GtkFixed, 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, GtkFixed 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 GtkFixed. 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 GtkFixed, by all means use the widget. But you should be aware of the tradeoffs.

  • Constructor Details

    • Fixed

      public Fixed(MemorySegment address)
      Create a Fixed instance for the provided memory address.
      Parameters:
      address - the memory address of the native object

    • Fixed

      public Fixed()
      Create a new Fixed.

  • Method Details

    • getType

      public static @Nullable Type getType()
      Get the GType of the Fixed class.
      Returns:
      the GType

    • getMemoryLayout

      public static MemoryLayout getMemoryLayout()
      The memory layout of the native struct.
      Returns:
      the memory layout

    • asParent

      protected Fixed asParent()
      Return this instance as if it were its parent type. Comparable to the Java super keyword, but ensures the parent typeclass is also used in native code.
      Overrides:
      asParent in class Widget
      Returns:
      the instance as if it were its parent type

    • getChildPosition

      public void getChildPosition(Widget widget, Out<Double> x, Out<Double> y)

      Retrieves the translation transformation of the given child GtkWidget in the GtkFixed.

      See also: getChildTransform(Widget).

      Parameters:
      widget - a child of this Fixed
      x - the horizontal position of the widget
      y - the vertical position of the widget

    • getChildTransform

      public @Nullable Transform getChildTransform(Widget widget)
      Retrieves the transformation for widget set using gtk_fixed_set_child_transform().
      Parameters:
      widget - a GtkWidget, child of this Fixed
      Returns:
      a GskTransform

    • move

      public void move(Widget widget, double x, double y)
      Sets a translation transformation to the given x and y coordinates to the child widget of the GtkFixed.
      Parameters:
      widget - the child widget
      x - the horizontal position to move the widget to
      y - the vertical position to move the widget to

    • put

      public void put(Widget widget, double x, double y)
      Adds a widget to a GtkFixed at the given position.
      Parameters:
      widget - the widget to add
      x - the horizontal position to place the widget at
      y - the vertical position to place the widget at

    • remove

      public void remove(Widget widget)
      Removes a child from fixed.
      Parameters:
      widget - the child widget to remove

    • setChildTransform

      public void setChildTransform(Widget widget, @Nullable Transform transform)

      Sets the transformation for widget.

      This is a convenience function that retrieves the FixedLayoutChild instance associated to widget and calls FixedLayoutChild.setTransform(Transform).

      Parameters:
      widget - a GtkWidget, child of this Fixed
      transform - the transformation assigned to widget to reset widget's transform

    • builder

      public static Fixed.Builder<? extends Fixed.Builder> builder()
      A Fixed.Builder object constructs a Fixed with the specified properties. Use the various set...() methods to set properties, and finish construction with Fixed.Builder.build().
      Returns:
      the builder object