ModelButtonProtocol

public protocol ModelButtonProtocol : ButtonProtocol

GtkModelButton is a button class that can use a GAction as its model. In contrast to GtkToggleButton or GtkRadioButton, which can also be backed by a GAction via the GtkActionable:action-name property, GtkModelButton will adapt its appearance according to the kind of action it is backed by, and appear either as a plain, check or radio button.

Model buttons are used when popovers from a menu model with gtk_popover_new_from_model(); they can also be used manually in a GtkPopoverMenu.

When the action is specified via the GtkActionable:action-name and GtkActionable:action-target properties, the role of the button (i.e. whether it is a plain, check or radio button) is determined by the type of the action and doesn’t have to be explicitly specified with the GtkModelButton:role property.

The content of the button is specified by the GtkModelButton:text and GtkModelButton:icon properties.

The appearance of model buttons can be influenced with the GtkModelButton:centered and GtkModelButton:iconic properties.

Model buttons have built-in support for submenus in GtkPopoverMenu. To make a GtkModelButton that opens a submenu when activated, set the GtkModelButton:menu-name property. To make a button that goes back to the parent menu, you should set the GtkModelButton:inverted property to place the submenu indicator at the opposite side.

Example

<object class="GtkPopoverMenu">
  <child>
    <object class="GtkBox">
      <property name="visible">True</property>
      <property name="margin">10</property>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="action-name">view.cut</property>
          <property name="text" translatable="yes">Cut</property>
        </object>
      </child>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="action-name">view.copy</property>
          <property name="text" translatable="yes">Copy</property>
        </object>
      </child>
      <child>
        <object class="GtkModelButton">
          <property name="visible">True</property>
          <property name="action-name">view.paste</property>
          <property name="text" translatable="yes">Paste</property>
        </object>
      </child>
    </object>
  </child>
</object>

CSS nodes

(plain Language Example):

modelbutton
├── <child>
╰── check

(plain Language Example):

modelbutton
├── <child>
╰── radio

(plain Language Example):

modelbutton
├── <child>
╰── arrow

GtkModelButton has a main CSS node with name modelbutton, and a subnode, which will have the name check, radio or arrow, depending on the role of the button and whether it has a menu name set.

The subnode is positioned before or after the content nodes and gets the .left or .right style class, depending on where it is located.

(plain Language Example):

button.model
├── <child>
╰── check

Iconic model buttons (see GtkModelButton:iconic) change the name of their main node to button and add a .model style class to it. The indicator subnode is invisible in this case.

The ModelButtonProtocol protocol exposes the methods and properties of an underlying GtkModelButton instance. The default implementation of these can be found in the protocol extension below. For a concrete class that implements these methods and properties, see ModelButton. Alternatively, use ModelButtonRef as a lighweight, unowned reference if you already have an instance you just want to use.