class Gtk::FixedLayout
- Gtk::FixedLayout
- Gtk::LayoutManager
- GObject::Object
- Reference
- Object
Overview
Gtk::FixedLayout is a layout manager which can place child widgets
at fixed positions.
Most applications should never use this layout manager; fixed positioning and sizing requires constant recalculations on where children need to be positioned and sized. Other layout managers perform this kind of work internally so that application developers don't need to do it. Specifically, widgets positioned in a fixed layout manager will need to take into account:
-
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, Gtk::FixedLayout 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 depending on the text direction, e.g. to put labels
to the right of the thing they label when using an RTL language;
Gtk::FixedLayout won't be able to do that for you.
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.
Defined in:
lib/gi-crystal/src/auto/gtk-4.0/fixed_layout.crConstructors
-
.new : self
Creates a new
Gtk::FixedLayout.
Class Method Summary
-
.g_type : UInt64
Returns the type id (GType) registered in GLib type system.
Instance methods inherited from class Gtk::LayoutManager
allocate(widget : Gtk::Widget, width : Int32, height : Int32, baseline : Int32) : Nil
allocate,
layout_changed : Nil
layout_changed,
layout_child(child : Gtk::Widget) : Gtk::LayoutChild
layout_child,
measure(widget : Gtk::Widget, orientation : Gtk::Orientation, for_size : Int32) : Nil
measure,
request_mode : Gtk::SizeRequestMode
request_mode,
widget : Gtk::Widget?
widget
Constructor methods inherited from class Gtk::LayoutManager
new
new
Class methods inherited from class Gtk::LayoutManager
g_type : UInt64
g_type
Instance methods inherited from class GObject::Object
bind_property(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags) : GObject::Binding
bind_property,
bind_property_full(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags, transform_to : GObject::Closure, transform_from : GObject::Closure) : GObject::Binding
bind_property_full,
data(key : String) : Pointer(Void)?
data,
finalize
finalize,
freeze_notify : Nil
freeze_notify,
getv(names : Enumerable(String), values : Enumerable(_)) : Nil
getv,
notify(property_name : String) : Nil
notify,
notify_by_pspec(pspec : GObject::ParamSpec) : Nil
notify_by_pspec,
notify_signal
notify_signal,
property(property_name : String, value : _) : Nil
property,
qdata(quark : UInt32) : Pointer(Void)?
qdata,
ref_count : UInt32
ref_count,
run_dispose : Nil
run_dispose,
set_data(key : String, data : Pointer(Void)?) : Nil
set_data,
set_property(property_name : String, value : _) : Nil
set_property,
steal_data(key : String) : Pointer(Void)?
steal_data,
steal_qdata(quark : UInt32) : Pointer(Void)?
steal_qdata,
thaw_notify : Nil
thaw_notify,
to_unsafe : Pointer(Void)
to_unsafe,
watch_closure(closure : GObject::Closure) : Nil
watch_closure
Constructor methods inherited from class GObject::Object
cast(obj : GObject::Object) : self
cast,
cast?(obj : GObject::Object) : self?
cast?,
new(pointer : Pointer(Void), transfer : GICrystal::Transfer)new new, newv(object_type : UInt64, parameters : Enumerable(GObject::Parameter)) : self newv