Expander

---

Object Hierarchy:

Description:

Content:

Properties:

• public bool expanded { construct set; get; }
• public string label { construct set; get; }
• public Widget label_widget { set; get; }
• public int spacing { set; get; }
• public bool use_markup { construct set; get; }
• public bool use_underline { construct set; get; }

Creation methods:

• public Expander (string label)
  Creates a new expander using label as the text of the label.
• public Expander.with_mnemonic (string label)
  Creates a new expander using label as the text of the label. If characters in label are preceded by an underscore, they are underlined. If you need a literal underscore character in a label, use '__' (two underscores). The first underlined character represents a keyboard accelerator called a mnemonic. Pressing Alt and that key activates the button.

Methods:

• public bool get_expanded ()
  Queries a Expander and returns its current state. Returns true if the child widget is revealed.
• public unowned string get_label ()
  Fetches the text from a label widget including any embedded underlines indicating mnemonics and Pango markup, as set by set_label. If the label text has not been set the return value will be null. This will be the case if you create an empty button with Button to use as a container.
• public weak Widget get_label_widget ()
  Retrieves the label widget for the frame. See set_label_widget.
• public int get_spacing ()
  Gets the value set by set_spacing.
• public bool get_use_markup ()
  Returns whether the label's text is interpreted as marked up with the Pango text markup
  language. See set_use_markup.
• public bool get_use_underline ()
  Returns whether an embedded underline in the expander label indicates a mnemonic. See set_use_underline.
• public void set_expanded (bool expanded)
  Sets the state of the expander. Set to true, if you want the child widget to be revealed, and false if you want the child widget to be hidden.
• public void set_label (string label)
  Sets the text of the label of the expander to label.
• public void set_label_widget (Widget label_widget)
  Set the label widget for the expander. This is the widget that will appear embedded alongside the expander arrow.
• public void set_spacing (int spacing)
  Sets the spacing field of expander, which is the number of pixels to place between expander and the child.
• public void set_use_markup (bool use_markup)
  Sets whether the text of the label contains markup in Pango's text markup
  language. See set_markup.
• public void set_use_underline (bool use_underline)
  If true, an underline in the text of the expander label indicates the next character should be used for the mnemonic accelerator key.

Signals:

• public virtual void activate ()